Quad, 8-Bit, 100 MSPS,
Serial LVDS 1.8 V ADC
AD9287
Data Sheet
FEATURES
FUNCTIONAL BLOCK DIAGRAM
APPLICATIONS
Medical imaging and nondestructive ultrasound
Portable ultrasound and digital beam-forming systems
Quadrature radio receivers
Diversity radio receivers
Tape drives
Optical networking
Test equipment
GENERAL DESCRIPTION
The AD9287 is a quad, 8-bit, 100 MSPS analog-to-digital converter (ADC) with an on-chip sample-and-hold circuit designed
for low cost, low power, small size, and ease of use. The product
operates at a conversion rate of up to 100 MSPS and is optimized
for outstanding dynamic performance and low power in
applications where a small package size is critical.
The ADC requires a single 1.8 V power supply and LVPECL-/
CMOS-/LVDS-compatible sample rate clock for full performance
operation. No external reference or driver components are
required for many applications.
The ADC automatically multiplies the sample rate clock for the
appropriate LVDS serial data rate. A data clock output (DCO) for
Rev. F
PDWN
AVDD
DRVDD
AD9287
DRGND
8
VIN + A
VIN – A
T/H
PIPELINE
ADC
VIN + B
VIN – B
T/H
PIPELINE
ADC
VIN + C
VIN – C
T/H
PIPELINE
ADC
VIN + D
VIN – D
T/H
PIPELINE
ADC
SERIAL
LVDS
D+A
D–A
SERIAL
LVDS
D+B
D–B
SERIAL
LVDS
D+C
D–C
SERIAL
LVDS
D+D
D–D
8
8
8
VREF
SENSE
FCO+
+
–
REFT
REFB
REF
SELECT
0.5V
SERIAL PORT
INTERFACE
DATA RATE
MULTIPLIER
FCO–
DCO+
DCO–
RBIAS AGND CSB SDIO/ODM SCLK/DTP CLK+ CLK–
05966-001
4 ADCs integrated into 1 package
133 mW ADC power per channel at 100 MSPS
SNR = 49 dB (to Nyquist)
ENOB = 7.85 bits
SFDR = 65 dBc (to Nyquist)
Excellent linearity
DNL = ±0.2 LSB (typical)
INL = ±0.2 LSB (typical)
Serial LVDS (ANSI-644, default)
Low power, reduced signal option (similar to IEEE 1596.3)
Data and frame clock outputs
295 MHz full-power analog bandwidth
2 V p-p input voltage range
1.8 V supply operation
Serial port control
Full-chip and individual-channel power-down modes
Flexible bit orientation
Built-in and custom digital test pattern generation
Programmable clock and data alignment
Programmable output resolution
Standby mode
Figure 1.
capturing data on the output and a frame clock output (FCO)
for signaling a new output byte are provided. Individual-channel
power-down is supported and typically consumes less than
2 mW when all channels are disabled.
The ADC contains several features designed to maximize
flexibility and minimize system cost, such as programmable
clock and data alignment and programmable digital test pattern
generation. The available digital test patterns include built-in
deterministic and pseudorandom patterns, along with custom userdefined test patterns entered via the serial port interface (SPI).
The AD9287 is available in an RoHS compliant, 48-lead LFCSP. It
is specified over the industrial temperature range of −40°C to
+85°C.
PRODUCT HIGHLIGHTS
1.
2.
3.
4.
5.
Small Footprint. Four ADCs are contained in a small, spacesaving package.
Low power of 133 mW/channel at 100 MSPS.
Ease of Use. A data clock output (DCO) is provided that
operates at frequencies of up to 400 MHz and supports
double data rate (DDR) operation.
User Flexibility. The SPI control offers a wide range of flexible
features to meet specific system requirements.
Pin-Compatible Family. This includes the AD9219 (10-bit),
AD9228 (12-bit), and AD9259 (14-bit).
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2006–2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
AD9287
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Analog Input Considerations ................................................... 19
Applications ....................................................................................... 1
Clock Input Considerations ...................................................... 21
General Description ......................................................................... 1
Serial Port Interface (SPI) .............................................................. 29
Functional Block Diagram .............................................................. 1
Hardware Interface ..................................................................... 29
Product Highlights ........................................................................... 1
Memory Map .................................................................................. 31
Revision History ............................................................................... 3
Reading the Memory Map Table .............................................. 31
Specifications..................................................................................... 4
Reserved Locations .................................................................... 31
AC Specifications.......................................................................... 5
Default Values ............................................................................. 31
Digital Specifications ................................................................... 6
Logic Levels ................................................................................. 31
Switching Specifications .............................................................. 7
Evaluation Board ............................................................................ 35
Timing Diagrams .............................................................................. 8
Power Supplies ............................................................................ 35
Absolute Maximum Ratings .......................................................... 10
Input Signals................................................................................ 35
Thermal Impedance ................................................................... 10
Output Signals ............................................................................ 35
ESD Caution ................................................................................ 10
Default Operation and Jumper Selection Settings ................. 36
Pin Configuration and Function Descriptions ........................... 11
Alternative Analog Input Drive Configuration...................... 37
Equivalent Circuits ......................................................................... 13
Outline Dimensions ....................................................................... 51
Typical Performance Characteristics ........................................... 15
Ordering Guide .......................................................................... 51
Theory of Operation ...................................................................... 19
Rev. F | Page 2 of 51
Data Sheet
AD9287
REVISION HISTORY
1/15—Rev. E to Rev. F
Changes to Figure 2........................................................................... 8
Changes to Figure 4........................................................................... 9
12/11—Rev. D to Rev. E
Changes to Output Signals Section and Figure 60......................35
Change to Default Operation and Jumper Selection Settings
Section ..............................................................................................36
Changes to Figure 63 ......................................................................39
Added Endnote 2 in Ordering Guide ...........................................51
4/10—Rev. C to Rev. D
Changes to Table 16 ........................................................................33
Updated Outline Dimensions ........................................................51
Changes to Ordering Guide ...........................................................51
1/10—Rev. B to Rev. C
Updated Outline Dimensions ........................................................51
Changes to Ordering Guide ...........................................................52
7/07—Rev. A to Rev. B
Changes to Figure 2 and Figure 4.................................................... 7
Changes to Table 17 ........................................................................48
5/07—Rev. 0 to Rev. A
Changes to Logic Output (SDIO/ODM)........................................ 5
Change to Pipeline Latency ............................................................. 6
Added Endnote 2 to Table 4............................................................. 6
Changes to Figure 2 to Figure 4....................................................... 7
Changes to Figure 10 ......................................................................12
Change to Figure 15 Caption ......................................................... 14
Changes to Figure 29 ...................................................................... 16
Changes to Figure 41 ...................................................................... 19
Changes to Clock Duty Cycle Considerations Section .............. 20
Changes to Power Dissipation and Power-Down Mode Section ...21
Changes to Figure 50 to Figure 52 Captions ............................... 23
Change to Table 8 ............................................................................ 23
Changes to Table 9 Endnote .......................................................... 24
Changes to Digital Outputs and Timing Section ........................ 25
Added Table 10 ................................................................................ 25
Changes to RBIAS Pin Section ...................................................... 26
Deleted Figure 53 and Figure 54 ................................................... 26
Changes to Figure 56 ...................................................................... 27
Changes to Hardware Interface Section ....................................... 28
Added Figure 57 .............................................................................. 29
Changes to Table 15 ........................................................................ 29
Changes to Reading the Memory Map Table Section ................ 30
Changes to Output Signals Section............................................... 34
Changes to Figure 60 ...................................................................... 34
Changes to Default Operation and
Jumper Selection Settings Section ................................................ 35
Changes to Alternative Analog Input Drive
Configuration Section .................................................................... 36
Changes to Figure 63 ...................................................................... 38
Changes to Table 17 ........................................................................ 46
Changes to Ordering Guide ........................................................... 50
7/06—Revision 0: Initial Version
Rev. F | Page 3 of 51
AD9287
Data Sheet
SPECIFICATIONS
AVDD = 1.8 V, DRVDD = 1.8 V, 2 V p-p differential input, 1.0 V internal reference, AIN = −0.5 dBFS, unless otherwise noted.
Table 1.
Parameter1
RESOLUTION
ACCURACY
No Missing Codes
Offset Error
Offset Matching
Gain Error
Gain Matching
Differential Nonlinearity (DNL)
Integral Nonlinearity (INL)
TEMPERATURE DRIFT
Offset Error
Gain Error
Reference Voltage (1 V Mode)
REFERENCE
Output Voltage Error (VREF = 1 V)
Load Regulation at 1.0 mA (VREF = 1 V)
Input Resistance
ANALOG INPUTS
Differential Input Voltage (VREF = 1 V)
Common-Mode Voltage
Differential Input Capacitance
Analog Bandwidth, Full Power
POWER SUPPLY
AVDD
DRVDD
IAVDD
IDRVDD
Total Power Dissipation (Including Output Drivers)
Power-Down Dissipation
Standby Dissipation2
CROSSTALK
CROSSTALK (Overrange Condition)3
Temp
Min
8
Full
Full
Full
Full
Full
Full
Full
Typ
Guaranteed
±5
±5
±6
±0.5
±0.2
±0.2
Full
Full
Full
±2
±17
±21
Full
Full
Full
±5
3
6
Full
Full
Full
Full
2
AVDD/2
7
295
Full
Full
Full
Full
Full
Full
Full
Full
Full
1.7
1.7
1.8
1.8
260
34.5
530
2
72
−100
−100
Max
Unit
Bits
±23.4
±23.4
mV
mV
% FS
% FS
LSB
LSB
±2
±0.8
±0.65
ppm/°C
ppm/°C
ppm/°C
±30
mV
mV
kΩ
V p-p
V
pF
MHz
1.9
1.9
274
38
562
4
V
V
mA
mA
mW
mW
mW
dB
dB
See the AN-835 Application Note, Understanding High Speed ADC Testing and Evaluation, at www.analog.com for definitions and for details on how these tests were
completed.
2
Can be controlled via the SPI.
3
Overrange condition is specific with 6 dB of the full-scale input range.
1
Rev. F | Page 4 of 51
Data Sheet
AD9287
AC SPECIFICATIONS
AVDD = 1.8 V, DRVDD = 1.8 V, 2 V p-p differential input, 1.0 V internal reference, AIN = −0.5 dBFS, unless otherwise noted.
Table 2.
Parameter1
SIGNAL-TO-NOISE RATIO (SNR)
fIN = 2.4 MHz
fIN = 49.7 MHz
fIN = 70 MHz
SIGNAL-TO-NOISE AND DISTORTION RATIO (SINAD)
fIN = 2.4 MHz
fIN = 49.7 MHz
fIN = 70 MHz
EFFECTIVE NUMBER OF BITS (ENOB)
fIN = 2.4 MHz
fIN = 49.7 MHz
fIN = 70 MHz
SPURIOUS-FREE DYNAMIC RANGE (SFDR)
fIN = 2.4 MHz
fIN = 49.7 MHz
fIN = 70 MHz
WORST HARMONIC (Second or Third)
fIN = 2.4 MHz
fIN = 49.7 MHz
fIN = 70 MHz
WORST OTHER (Excluding Second or Third)
fIN = 2.4 MHz
fIN = 49.7 MHz
fIN = 70 MHz
TWO-TONE INTERMODULATION DISTORTION (IMD)—
AIN1 AND AIN2 = −7.0 dBFS
fIN1 = 15 MHz, fIN2 = 16 MHz
fIN1 = 70 MHz, fIN2 = 71 MHz
1
Temp
Min
Typ
Max
Unit
Full
Full
Full
46.5
49.2
49.0
49.0
dB
dB
dB
Full
Full
Full
46.0
49.0
48.5
48.5
dB
dB
dB
Full
Full
Full
7.43
7.88
7.85
7.85
Bits
Bits
Bits
Full
Full
Full
54.0
70.0
65.0
62.0
dBc
dBc
dBc
Full
Full
Full
−70.0
−65.0
−62.0
−54.0
dBc
dBc
dBc
Full
Full
Full
−77.0
−74.0
−71.0
−58.5
dBc
dBc
dBc
25°C
25°C
70.0
68.5
dBc
dBc
See the AN-835 Application Note, Understanding High Speed ADC Testing and Evaluation, at www.analog.com for definitions and for details on how these tests were
completed.
Rev. F | Page 5 of 51
AD9287
Data Sheet
DIGITAL SPECIFICATIONS
AVDD = 1.8 V, DRVDD = 1.8 V, 2 V p-p differential input, 1.0 V internal reference, AIN = −0.5 dBFS, unless otherwise noted.
Table 3.
Parameter1
CLOCK INPUTS (CLK+, CLK−)
Logic Compliance
Differential Input Voltage2
Input Common-Mode Voltage
Input Resistance (Differential)
Input Capacitance
LOGIC INPUTS (PDWN, SCLK/DTP)
Logic 1 Voltage
Logic 0 Voltage
Input Resistance
Input Capacitance
LOGIC INPUT (CSB)
Logic 1 Voltage
Logic 0 Voltage
Input Resistance
Input Capacitance
LOGIC INPUT (SDIO/ODM)
Logic 1 Voltage
Logic 0 Voltage
Input Resistance
Input Capacitance
LOGIC OUTPUT (SDIO/ODM)3
Logic 1 Voltage (IOH = 800 μA)
Logic 0 Voltage (IOL = 50 μA)
DIGITAL OUTPUTS (D + x, D − x), (ANSI-644)
Logic Compliance
Differential Output Voltage (VOD)
Output Offset Voltage (VOS)
Output Coding (Default)
DIGITAL OUTPUTS (D + x, D − x),
(Low Power, Reduced Signal Option)
Logic Compliance
Differential Output Voltage (VOD)
Output Offset Voltage (VOS)
Output Coding (Default)
Temp
Min
Full
Full
25°C
25°C
250
Full
Full
25°C
25°C
1.2
Full
Full
25°C
25°C
1.2
Full
Full
25°C
25°C
1.2
0
Typ
Max
Unit
CMOS/LVDS/LVPECL
mV p-p
V
kΩ
pF
1.2
20
1.5
3.6
0.3
V
V
kΩ
pF
3.6
0.3
V
V
kΩ
pF
DRVDD + 0.3
0.3
V
V
kΩ
pF
30
0.5
70
0.5
30
2
Full
Full
1.79
0.05
V
V
454
1.375
mV
V
250
1.30
mV
V
LVDS
Full
Full
247
1.125
Offset binary
LVDS
Full
Full
150
1.10
Offset binary
See the AN-835 Application Note, Understanding High Speed ADC Testing and Evaluation, at www.analog.com for definitions and for details on how these tests were
completed.
2
This is specified for LVDS and LVPECL only.
3
This is specified for 13 SDIO pins sharing the same connection.
1
Rev. F | Page 6 of 51
Data Sheet
AD9287
SWITCHING SPECIFICATIONS
AVDD = 1.8 V, DRVDD = 1.8 V, 2 V p-p differential input, 1.0 V internal reference, AIN = −0.5 dBFS, unless otherwise noted.
Table 4.
Parameter1, 2
CLOCK3
Maximum Clock Rate
Minimum Clock Rate
Clock Pulse Width High (tEH)
Clock Pulse Width Low (tEL)
OUTPUT PARAMETERS3
Propagation Delay (tPD)
Rise Time (tR) (20% to 80%)
Fall Time (tF) (20% to 80%)
FCO Propagation Delay (tFCO)
DCO Propagation Delay (tCPD)4
DCO to Data Delay (tDATA)4
DCO to FCO Delay (tFRAME)4
Data to Data Skew
(tDATA-MAX − tDATA-MIN)
Wake-Up Time (Standby)
Wake-Up Time (Power-Down)
Pipeline Latency
APERTURE
Aperture Delay (tA)
Aperture Uncertainty (Jitter)
Out-of-Range Recovery Time
Temp
Min
Full
Full
Full
Full
100
Full
Full
Full
Full
Full
2.0
Full
Full
Full
(tSAMPLE/16) − 300
(tSAMPLE/16) − 300
Typ
Max
10
5
5
2.0
2.7
300
300
2.7
tFCO +
(tSAMPLE/16)
(tSAMPLE/16)
(tSAMPLE/16)
±50
3.5
3.5
(tSAMPLE/16) + 300
(tSAMPLE/16) + 300
±150
Unit
MSPS
MSPS
ns
ns
ns
ps
ps
ns
ns
ps
ps
ps
25°C
25°C
Full
600
375
8
ns
μs
CLK cycles
25°C
25°C
25°C
500
<1
2
ps
ps rms
CLK cycles
See the AN-835 Application Note, Understanding High Speed ADC Testing and Evaluation, at www.analog.com for definitions and for details on how these tests were
completed.
Measured on standard FR-4 material.
3
Can be adjusted via the SPI.
4
tSAMPLE/16 is based on the number of bits multiplied by 2; delays are based on half duty cycles.
1
2
Rev. F | Page 7 of 51
AD9287
Data Sheet
TIMING DIAGRAMS
N–1
VIN ± x
tA
N
tEL
tEH
CLK–
CLK+
tCPD
DCO–
DCO+
tFRAME
tFCO
FCO+
FCO–
tPD
tDATA
D–x
MSB
N–9
D6
N–9
D5
N–9
D4
N–9
D3
N–9
D2
N–9
D1
N–9
D0
N–9
MSB
N–8
D6
N–8
D5
N–8
D4
N–8
D3
N–8
D2
N–8
D1
N–8
05966-040
D+x
Figure 2. 8-Bit Data Serial Stream, MSB First (Default)
N–1
VIN ± x
tA
N
tEH
tEL
CLK–
CLK+
tCPD
DCO–
DCO+
tFRAME
tFCO
FCO–
FCO+
tPD
tDATA
MSB
N–9
D10
N–9
D9
N–9
D8
N–9
D7
N–9
D6
N–9
D5
N–9
D+x
Figure 3. 12-Bit Data Serial Stream, MSB First
Rev. F | Page 8 of 51
D4
N–9
D3
N–9
0
D2
N–9
0
D1
N–9
0
D0
N–9
0
MSB
N–8
D10
N–8
05966-039
D–x
Data Sheet
AD9287
N–1
VIN ± x
tA
N
tEL
tEH
CLK–
CLK+
tCPD
DCO–
DCO+
tFRAME
tFCO
FCO+
FCO–
tPD
tDATA
D–x
D0
N–9
D1
N–9
D2
N–9
D3
N–9
D4
N–9
D5
N–9
D6
N–9
LSB
N–8
D0
N–8
D1
N–8
D2
N–8
D3
N–8
D4
N–8
05966-041
LSB
N–9
D+x
Figure 4. 8-Bit Data Serial Stream, LSB First
Rev. F | Page 9 of 51
AD9287
Data Sheet
ABSOLUTE MAXIMUM RATINGS
Table 5.
Parameter
ELECTRICAL
AVDD
DRVDD
AGND
AVDD
Digital Outputs
(D + x, D − x, DCO+,
DCO−, FCO+, FCO−)
CLK+, CLK−
VIN + x, VIN − x
SDIO/ODM
PDWN, SCLK/DTP, CSB
REFT, REFB, RBIAS
VREF, SENSE
ENVIRONMENTAL
Operating Temperature
Range (Ambient)
Maximum Junction
Temperature
Lead Temperature
(Soldering, 10 sec)
Storage Temperature
Range (Ambient)
With
Respect To
Rating
AGND
DRGND
DRGND
DRVDD
DRGND
−0.3 V to +2.0 V
−0.3 V to +2.0 V
−0.3 V to +0.3 V
−2.0 V to +2.0 V
−0.3 V to +2.0 V
Stresses at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product reliability.
THERMAL IMPEDANCE
AGND
AGND
AGND
AGND
AGND
AGND
−0.3 V to +3.9 V
−0.3 V to +2.0 V
−0.3 V to +2.0 V
−0.3 V to +3.9 V
−0.3 V to +2.0 V
−0.3 V to +2.0 V
−40°C to +85°C
Table 6.
Air Flow Velocity (m/sec)
0.0
1.0
2.5
1
θJB
θJC
12.6
1.2
Unit
°C/W
°C/W
°C/W
θJA for a 4-layer PCB with solid ground plane (simulated). Exposed pad
soldered to PCB.
ESD CAUTION
150°C
θJA1
24
21
19
300°C
−65°C to +150°C
Rev. F | Page 10 of 51
Data Sheet
AD9287
REFB
VREF
SENSE
RBIAS
AVDD
VIN + B
VIN – B
41
40
39
38
37
REFT
44
42
AVDD
45
43
AVDD
46
VIN – C
VIN + C
48
47
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
PIN 1
INDICATOR
AV DD 1
AV DD 2
VIN – D 3
EXPOSED PADDLE, PIN 0
(BOTTOM OF PACKAGE)
VIN + D 4
AV DD 5
AV DD 6
AD9287
CLK– 7
TOP VIEW
(Not to Scale)
36
AV DD
35
AV DD
34
VIN – A
33
VIN + A
32
AV DD
31
PDWN
24
DCO+
NOTES
1. THE EXPOSED PAD MUST BE CONNECTED TO ANALOG GROUND.
Figure 5. 48-Lead LFCSP Pin Configuration, Top View
Table 7. Pin Function Descriptions
Pin No.
0
1, 2, 5, 6, 9, 10, 27, 32,
35, 36, 39, 45, 46
11, 26
12, 25
3
4
7
8
13
14
15
16
17
18
19
20
21
22
23
24
28
29
30
31
33
Mnemonic
AGND
AVDD
Description
Analog Ground (Exposed Paddle)
1.8 V Analog Supply
DRGND
DRVDD
VIN − D
VIN + D
CLK−
CLK+
D−D
D+D
D−C
D+C
D−B
D+B
D−A
D+A
FCO−
FCO+
DCO−
DCO+
SCLK/DTP
SDIO/ODM
CSB
PDWN
VIN + A
Digital Output Driver Ground
1.8 V Digital Output Driver Supply
ADC D Analog Input Complement
ADC D Analog Input True
Input Clock Complement
Input Clock True
ADC D Digital Output Complement
ADC D Digital Output True
ADC C Digital Output Complement
ADC C Digital Output True
ADC B Digital Output Complement
ADC B Digital Output True
ADC A Digital Output Complement
ADC A Digital Output True
Frame Clock Output Complement
Frame Clock Output True
Data Clock Output Complement
Data Clock Output True
Serial Clock/Digital Test Pattern
Serial Data IO/Output Driver Mode
Chip Select Bar
Power-Down
ADC A Analog Input True
Rev. F | Page 11 of 51
05966-003
23
D–B
D–C
D–D
DCO–
DRVDD
FCO–
DRGND
25
FCO+ 22
26
DRVDD 12
21
DRGND 11
20
AV DD
D+A
27
D – A 19
SCLK/DTP
AV DD 10
D + B 18
28
17
AV DD 9
15
SDIO/ODM
D + C 16
29
13
CSB
CLK+ 8
D + D 14
30
AD9287
Pin No.
34
37
38
40
41
42
43
44
47
48
Data Sheet
Mnemonic
VIN − A
VIN − B
VIN + B
RBIAS
SENSE
VREF
REFB
REFT
VIN + C
VIN − C
Description
ADC A Analog Input Complement
ADC B Analog Input Complement
ADC B Analog Input True
External resistor sets the internal ADC core bias current
Reference Mode Selection
Voltage Reference Input/Output
Differential Reference (Negative)
Differential Reference (Positive)
ADC C Analog Input True
ADC C Analog Input Complement
Rev. F | Page 12 of 51
Data Sheet
AD9287
EQUIVALENT CIRCUITS
DRVDD
V
V
D–
VIN ± x
D+
DRGND
Figure 6. Equivalent Analog Input Circuit
CLK+
V
05966-005
05966-030
V
Figure 9. Equivalent Digital Output Circuit
10Ω
10kΩ
1.25V
10kΩ
SCLK/DTP
AND
PDWN
10Ω
1kΩ
30kΩ
05966-033
05966-032
CLK–
Figure 7. Equivalent Clock Input Circuit
Figure 10. Equivalent SCLK/DTP and PDWN Input Circuit
RBIAS
350Ω
05966-031
30kΩ
05966-035
SDIO/ODM
100Ω
Figure 8. Equivalent SDIO/ODM Input Circuit
Figure 11. Equivalent RBIAS Circuit
Rev. F | Page 13 of 51
AD9287
Data Sheet
AVDD
70kΩ
CSB
1kΩ
6kΩ
Figure 14. Equivalent VREF Circuit
Figure 12. Equivalent CSB Input Circuit
1kΩ
05966-036
SENSE
05966-037
05966-034
VREF
Figure 13. Equivalent SENSE Circuit
Rev. F | Page 14 of 51
Data Sheet
AD9287
TYPICAL PERFORMANCE CHARACTERISTICS
AIN = –0.5dBFS
SNR = 49.21dB
ENOB = 7.88 BITS
SFDR = 70.89dBc
–10
–30
AMPLITUDE (dBFS)
–50
–70
–90
0
5
10
15
20
25
30
35
40
45
50
FREQUENCY (MHz)
–110
05966-055
–110
Figure 15. Single-Tone 32k FFT with fIN = 2.4 MHz, fSAMPLE = 100 MSPS
0
5
10
15
20
25
30
35
40
45
50
FREQUENCY (MHz)
Figure 18. Single-Tone 32k FFT with fIN = 170 MHz, fSAMPLE = 100 MSPS
AIN = –0.5dBFS
SNR = 49.17dB
ENOB = 7.87 BITS
SFDR = 62.44dBc
–10
AIN = –0.5dBFS
SNR = 48.07dB
ENOB = 7.69 BITS
SFDR = 61.37dBc
–10
–30
AMPLITUDE (dBFS)
–30
–50
–70
–50
–70
–90
–90
0
5
10
15
20
25
30
35
40
45
50
FREQUENCY (MHz)
–110
05966-059
–110
0
10
15
20
25
30
35
40
45
50
FREQUENCY (MHz)
Figure 19. Single-Tone 32k FFT with fIN = 190 MHz, fSAMPLE = 100 MSPS
Figure 16. Single-Tone 32k FFT with fIN = 70 MHz, fSAMPLE = 100 MSPS
AIN = –0.5dBFS
SNR = 49.16dB
ENOB = 7.87 BITS
SFDR = 70.32dBc
–10
5
05966-052
AMPLITUDE (dBFS)
–70
05966-051
–90
–50
AIN = –0.5dBFS
SNR = 48.32dB
ENOB = 7.73 BITS
SFDR = 54.48dBc
–10
–30
AMPLITUDE (dBFS)
–30
–50
–70
–50
–70
–90
–90
0
5
10
15
20
25
30
FREQUENCY (MHz)
35
40
45
50
–110
05966-060
–110
Figure 17. Single-Tone 32k FFT with fIN = 120 MHz, fSAMPLE = 100 MSPS
0
5
10
15
20
25
30
FREQUENCY (MHz)
35
40
45
50
05966-053
AMPLITUDE (dBFS)
–30
AMPLITUDE (dBFS)
AIN = –0.5dBFS
SNR = 48.36dB
ENOB = 7.74 BITS
SFDR = 65.17dBc
–10
Figure 20. Single-Tone 32k FFT with fIN = 225 MHz, fSAMPLE = 100 MSPS
Rev. F | Page 15 of 51
AD9287
Data Sheet
80
80
75
70
70
60
2V p-p, SFDR
SNR/SFDR (dB)
SNR/SFDR (dB)
2V p-p, SFDR
65
60
55
50
40
30
60dB REFERENCE
50
20
2V p-p, SNR
2V p-p, SNR
45
30
40
50
60
70
80
90
100
fSAMPLE (MSPS)
0
–60
–50
–40
–30
–20
–10
0
ANALOG INPUT LEVEL (dBFS)
05966-058
20
05966-061
40
10
10
Figure 24. SNR/SFDR vs. Analog Input Level, fIN = 35 MHz, fSAMPLE = 100 MSPS
Figure 21. SNR/SFDR vs. fSAMPLE, fIN = 10.3 MHz, fSAMPLE = 100 MSPS
80
AIN1 AND AIN2 = –7dBFS
SFDR = 72.90dBc
IMD2 = 70.43dBc
IMD3 = 71.97dBc
–10
70
AMPLITUDE (dBFS)
–30
60
50
2V p-p, SNR
–70
–90
40
–110
20
30
40
50
60
70
80
90
100
fSAMPLE (MSPS)
0
05966-062
30
10
–50
10
15
20
25
30
35
40
45
50
FREQUENCY (MHz)
Figure 25. Two-Tone 32k FFT with fIN1 = 15 MHz and fIN2 = 16 MHz,
fSAMPLE = 100 MSPS
Figure 22. SNR/SFDR vs. fSAMPLE, fIN = 35 MHz, fSAMPLE = 100 MSPS
80
AIN1 AND AIN2 = –7dBFS
SFDR = 71.14dBc
IMD2 = 69.46dBc
IMD3 = 70.33dBc
–10
70
60
AMPLITUDE (dBFS)
–30
2V p-p, SFDR
SNR/SFDR (dB)
5
05966-049
SNR/SFDR (dB)
2V p-p, SFDR
50
40
30
60dB REFERENCE
20
2V p-p, SNR
–50
–70
–90
–110
–50
–40
–30
–20
ANALOG INPUT LEVEL (dBFS)
–10
0
05966-057
0
–60
Figure 23. SNR/SFDR vs. Analog Input Level, fIN = 10.3 MHz, fSAMPLE = 100 MSPS
Rev. F | Page 16 of 51
0
5
10
15
20
25
30
35
40
45
50
FREQUENCY (MHz)
Figure 26. Two-Tone 32k FFT with fIN1 = 70 MHz and fIN2 = 71 MHz,
fSAMPLE = 100 MSPS
05966-050
10
Data Sheet
AD9287
80
0.5
75
0.4
0.3
65
0.2
60
0.1
55
2V p-p, SNR (dB)
50
0
–0.1
45
–0.2
40
–0.3
35
–0.4
10
1
100
–0.5
05966-063
30
1000
ANALOG INPUT FREQUENCY (MHz)
0
50
100
150
200
250
CODE
Figure 27. SNR/SFDR vs. Analog Input Frequency, fSAMPLE = 100 MSPS
05966-066
2V p-p, SFDR (dBc)
DNL (LSB)
SNR/SFDR (dB)
70
Figure 30. DNL, fIN = 2.4 MHz, fSAMPLE = 100 MSPS
–45.0
80
75
–45.5
65
–46.0
2V p-p, SFDR
CMRR (dB)
SINAD/SFDR (dB)
70
60
55
–46.5
–47.0
50
2V p-p, SNR
05966-075
–47.5
45
–20
0
20
40
60
80
TEMPERATURE (°C)
–48.0
10
05966-064
40
–40
20
25
30
35
40
45
50
ANALOG INPUT FREQUENCY (MHz)
Figure 31. CMRR vs. Analog Input Frequency, fSAMPLE = 100 MSPS
Figure 28. SINAD/SFDR vs. Temperature, fIN = 10.3 MHz, fSAMPLE = 100 MSPS
0
1.0
–0.2
INPUT FULL-SCALE AMPLITUDE (dB)
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–0.4
–0.6
–0.8
–1.0
–1.2
–1.4
–1.6
0
50
100
150
200
CODE
250
–2.0
10
20
30
40
50
60
70
80
90
fSAMPLE (MSPS)
Figure 29. INL, fIN = 2.4 MHz, fSAMPLE = 100 MSPS
Figure 32. Input Full-Scale Amplitude vs. fSAMPLE
Rev. F | Page 17 of 51
100
05966-048
–1.8
–1.0
05966-065
INL (LSB)
15
AD9287
Data Sheet
0
NPR = 40.12dB
NOTCH = 18MHz
NOTCH WIDTH = 3MHz
–1
–50
–70
–90
–2
–3dB CUTOFF = 295MHz
–3
–4
–5
–6
–7
–8
–9
–110
0
5
10
15
20
25
30
35
40
45
FREQUENCY (MHz)
50
05966-054
AMPLITUDE (dB)
–30
05966-077
FUNDAMENTAL LEVEL (dBFS)
–10
Figure 33. Noise Power Ratio (NPR), fSAMPLE = 100 MSPS
–10
0
50
100
150
200
250
300
350
400
450
500
FREQUENCY (MHz)
Figure 34. Full-Power Bandwidth vs. Frequency, fSAMPLE = 100 MSPS
Rev. F | Page 18 of 51
Data Sheet
AD9287
THEORY OF OPERATION
The AD9287 architecture consists of a pipelined ADC divided into
three sections: a 4-bit first stage followed by eight 1.5-bit stages and
a final 3-bit flash. Each stage provides sufficient overlap to correct
for flash errors in the preceding stage. The quantized outputs from
each stage are combined into a final 8-bit result in the digital
correction logic. The pipelined architecture permits the first stage
to operate with a new input sample while the remaining stages
operate with preceding samples. Sampling occurs on the rising
edge of the clock.
inductors or ferrite beads is required when driving the converter
front end at high IF frequencies. Either a shunt capacitor or two
single-ended capacitors can be placed on the inputs to provide a
matching passive network. This ultimately creates a low-pass
filter at the input to limit unwanted broadband noise. See the
AN-742 Application Note, the AN-827 Application Note, and the
Analog Dialogue article “Transformer-Coupled Front-End for
Wideband A/D Converters” (Volume 39, April 2005) for more
information at www.analog.com. In general, the precise values
depend on the application.
Each stage of the pipeline, excluding the last, consists of a low
resolution flash ADC connected to a switched-capacitor DAC
and an interstage residue amplifier (for example, a multiplying
digital-to-analog converter (MDAC)). The residue amplifier
magnifies the difference between the reconstructed DAC output
and the flash input for the next stage in the pipeline. One bit of
redundancy is used in each stage to facilitate digital correction of
flash errors. The last stage simply consists of a flash ADC.
The analog inputs of the AD9287 are not internally dc-biased.
Therefore, in ac-coupled applications, the user must provide
this bias externally. Setting the device so that VCM = AVDD/2 is
recommended for optimum performance, but the device can
function over a wider range with reasonable performance, as
shown in Figure 36 and Figure 37.
The analog input to the AD9287 is a differential switchedcapacitor circuit designed for processing differential input
signals. The circuit can support a wide common-mode range
while maintaining excellent performance. By using an input
common-mode voltage of midsupply, users can minimize
signal-dependent errors and achieve optimum performance.
fIN = 2.4MHz
fSAMPLE = 100MSPS
SFDR (dBc)
70
60
50
SNR (dB)
40
30
20
10
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
ANALOG INPUT COMMON-MODE VOLTAGE (V)
Figure 36. SNR/SFDR vs. Common-Mode Voltage,
fIN = 2.4 MHz, fSAMPLE = 100 MSPS
H
CPAR
90
H
VIN + x
80
CSAMPLE
S
S
S
S
SNR/SFDR (dB)
H
05966-006
H
CPAR
fIN = 30MHz
fSAMPLE = 100MSPS
70
CSAMPLE
VIN – x
05966-067
ANALOG INPUT CONSIDERATIONS
80
SNR/SFDR (dB)
The output staging block aligns the data, corrects errors, and
passes the data to the output buffers. The data is then serialized
and aligned to the frame and data clocks.
90
Figure 35. Switched-Capacitor Input Circuit
SFDR (dBc)
60
50
SNR (dB)
40
30
20
Rev. F | Page 19 of 51
10
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
ANALOG INPUT COMMON-MODE VOLTAGE (V)
Figure 37. SNR/SFDR vs. Common-Mode Voltage,
fIN = 30 MHz, fSAMPLE = 100 MSPS
1.6
05966-068
The clock signal alternately switches the input circuit between
sample mode and hold mode (see Figure 35). When the input
circuit is switched to sample mode, the signal source must be
capable of charging the sample capacitors and settling within
one-half of a clock cycle. A small resistor in series with each
input can help reduce the peak transient current injected from
the output stage of the driving source. In addition, low-Q inductors
or ferrite beads can be placed on each leg of the input to reduce
high differential capacitance at the analog inputs and therefore
achieve the maximum bandwidth of the ADC. Such use of low-Q
AD9287
Data Sheet
ADT1-1WT
1:1 Z RATIO
For best dynamic performance, the source impedances driving
VIN + x and VIN − x should be matched such that commonmode settling errors are symmetrical. These errors are reduced
by the common-mode rejection of the ADC. An internal
reference buffer creates the positive and negative reference
voltages, REFT and REFB, respectively, that define the span of
the ADC core. The output common-mode of the reference buffer
is set to midsupply, and the REFT and REFB voltages and span
are defined as
C
R
2V p-p
49.9Ω
1C
VIN + x
R
AVDD
ADC
AD9287
DIFF
VIN – x
AGND
C
1kΩ
05966-008
1kΩ
0.1μF
1C
DIFF IS OPTIONAL
Figure 38. Differential Transformer-Coupled Configuration
for Baseband Applications
REFT = 1/2 (AVDD + VREF)
REFB = 1/2 (AVDD − VREF)
Span = 2 × (REFT − REFB) = 2 × VREF
2V p-p
16nH
ADT1-1WT
0.1μF 1:1 Z RATIO 16nH
33Ω
VIN + x
65Ω
It can be seen from these equations that the REFT and REFB
voltages are symmetrical about the midsupply voltage and, by
definition, the input span is twice the value of the VREF voltage.
499Ω
16nH
2.2pF
ADC
AD9287
1kΩ
33Ω
VIN – x
AVDD
05966-047
1kΩ
Maximum SNR performance is achieved by setting the ADC to
the largest span in a differential configuration. In the case of the
AD9287, the largest input span available is 2 V p-p.
0.1μF
1kΩ
Figure 39. Differential Transformer-Coupled Configuration
for IF Applications
Differential Input Configurations
Single-Ended Input Configuration
There are several ways to drive the AD9287 either actively or
passively; however, optimum performance is achieved by driving
the analog input differentially. For example, using the AD8332
differential driver to drive the AD9287 provides excellent performance and a flexible interface to the ADC (see Figure 41) for
baseband applications. This configuration is commonly used
for medical ultrasound systems.
A single-ended input may provide adequate performance in costsensitive applications. In this configuration, SFDR and distortion
performance degrade due to the large input common-mode swing.
If the application requires a single-ended input configuration,
ensure that the source impedances on each input are well matched
in order to achieve the best possible performance. A full-scale
input of 2 V p-p can be applied to the ADC’s VIN + x pin while the
VIN − x pin is terminated. Figure 40 details a typical singleended input configuration.
For applications where SNR is a key parameter, differential
transformer coupling is the recommended input configuration
(see Figure 38 and Figure 39), because the noise performance of
most amplifiers is not adequate to achieve the true performance
of the AD9287.
AVDD
C
R
2V p-p
Regardless of the configuration, the value of the shunt capacitor,
C, is dependent on the input frequency and may need to be
reduced or removed.
0.1µF
49.9Ω
1C
AVDD
1kΩ 25Ω
0.1µF
VIN + x
1kΩ
ADC
AD9287
DIFF
R
VIN – x
C
05966-009
1kΩ
1C
DIFF IS OPTIONAL
Figure 40. Single-Ended Input Configuration
0.1μF
LOP
0.1μF 120nH
VIP
AVDD
VOH
INH
22pF
0.1μF
187Ω
AD8332
LNA
VGA
+
VOL
LON
274Ω
187Ω
VIN
680nH
VIN + x
10kΩ
AVDD
33Ω
LMD
18nF
68pF
33Ω
10kΩ
1kΩ
ADC
AD9287
10kΩ
VIN – x
10kΩ
LPF
05966-007
1V p-p
680nH
0.1μF
Figure 41. Differential Input Configuration Using the AD8332 with Two-Pole, 16 MHz Low-Pass Filter
Rev. F | Page 20 of 51
Data Sheet
AD9287
Figure 42 shows a preferred method for clocking the AD9287. The
low jitter clock source is converted from a single-ended signal to a
differential signal using an RF transformer. The back-to-back
Schottky diodes across the secondary transformer limit clock
excursions into the AD9287 to approximately 0.8 V p-p
differential. This helps prevent the large voltage swings of the
clock from feeding through to other portions of the AD9287, and
it preserves the fast rise and fall times of the signal, which are
critical to low jitter performance.
AD9510/AD9511/
AD9512/AD9513/
AD9514/AD9515
0.1µF
CLK+
CLK
50Ω1
0.1µF
CLK+
CLK–
0.1µF
50Ω
Figure 45. Single-Ended 1.8 V CMOS Sample Clock
AD9510/AD9511/
AD9512/AD9513/
AD9514/AD9515
ADC
AD9287
CLK
05966-024
SCHOTTKY
DIODES:
HSM2812
AD9510/AD9511/
AD9512/AD9513/
AD9514/AD9515
CLK+
CLK–
100Ω
PECL DRIVER
0.1µF
CLK
150Ω
50Ω1
240Ω
ADC
AD9287
CLK–
240Ω
05966-025
50Ω1
RESISTORS ARE OPTIONAL.
Figure 43. Differential PECL Sample Clock
0.1µF
CLK+
AD9510/AD9511/
AD9512/AD9513/
AD9514/AD9515
0.1µF
CLK+
CLK
0.1µF
CLK–
LVDS DRIVER
100Ω
0.1µF
CLK
150Ω
ADC
AD9287
CLK–
50Ω1
RESISTORS ARE OPTIONAL.
05966-026
50Ω1
ADC
AD9287
CLK–
Figure 46. Single-Ended 3.3 V CMOS Sample Clock
0.1µF
CLK
0.1µF
CLK+
150Ω RESISTORS ARE OPTIONAL.
Another option is to ac-couple a differential PECL signal to the
sample clock input pins as shown in Figure 43. The AD9510/
AD9511/AD9512/AD9513/AD9514/AD9515 family of clock
drivers offers excellent jitter performance.
0.1µF
OPTIONAL 0.1µF
100Ω
0.1µF
Figure 42. Transformer-Coupled Differential Clock
0.1µF
CMOS DRIVER
CLK+
CLK–
CLK+
CLK
50Ω1
0.1µF
0.1µF
39kΩ
150Ω RESISTORS ARE OPTIONAL.
CLK+
100Ω
CLK+
ADC
AD9287
CLK
0.1µF
0.1µF
Mini-Circuits®
ADT1-1WT, 1:1Z
0.1µF
XFMR
OPTIONAL
0.1µF
100Ω
CMOS DRIVER
05966-027
For optimum performance, the AD9287 sample clock inputs
(CLK+ and CLK−) should be clocked with a differential signal.
This signal is typically ac-coupled to the CLK+ and CLK− pins
via a transformer or capacitors. These pins are biased internally
and require no additional biasing.
in parallel with a 39 kΩ resistor (see Figure 45). Although the
CLK+ input circuit supply is AVDD (1.8 V), this input is
designed to withstand input voltages of up to 3.3 V and
therefore offers several selections for the drive logic voltage.
05966-028
CLOCK INPUT CONSIDERATIONS
Figure 44. Differential LVDS Sample Clock
In some applications, it is acceptable to drive the sample clock
inputs with a single-ended CMOS signal. In such applications,
CLK+ should be driven directly from a CMOS gate, and the
CLK− pin should be bypassed to ground with a 0.1 μF capacitor
Clock Duty Cycle Considerations
Typical high speed ADCs use both clock edges to generate a variety
of internal timing signals. As a result, these ADCs may be sensitive
to the clock duty cycle. Commonly, a 5% tolerance is required on
the clock duty cycle to maintain dynamic performance characteristics. The AD9287 contains a duty cycle stabilizer (DCS) that
retimes the nonsampling edge, providing an internal clock signal
with a nominal 50% duty cycle. This allows a wide range of clock
input duty cycles without affecting the performance of the AD9287.
When the DCS is on, noise and distortion performance are nearly
flat for a wide range of duty cycles. However, some applications
may require the DCS function to be off. If so, keep in mind that
the dynamic range performance can be affected when operated
in this mode. See the Memory Map section for more details on
using this feature.
Jitter in the rising edge of the input is an important concern, and it
is not reduced by the internal stabilization circuit. The duty cycle
control loop does not function for clock rates of less than 20 MHz
nominal. The loop has a time constant associated with it that
must be considered in applications where the clock rate can
change dynamically. This requires a wait time of 1.5 μs to 5 μs
after a dynamic clock frequency increase (or decrease) before
the DCS loop is relocked to the input signal. During the period
that the loop is not locked, the DCS loop is bypassed and the
internal device timing is dependent on the duty cycle of the input
clock signal. In such applications, it may be appropriate to disable
the duty cycle stabilizer. In all other applications, enabling the
DCS circuit is recommended to maximize ac performance.
Rev. F | Page 21 of 51
AD9287
Data Sheet
Clock Jitter Considerations
Power Dissipation and Power-Down Mode
High speed, high resolution ADCs are sensitive to the quality of the
clock input. The degradation in SNR at a given input frequency (fA)
due only to aperture jitter (tJ) can be calculated by
As shown in Figure 48, the power dissipated by the AD9287 is
proportional to its sample rate. The digital power dissipation
does not vary significantly because it is determined primarily by
the DRVDD supply and bias current of the LVDS output drivers.
600
AVDD CURRENT
250
550
200
500
TOTAL POWER
150
450
100
400
50
DRVDD CURRENT
0
0
20
40
60
80
100
POWER (mW)
The clock input should be treated as an analog signal in cases
where aperture jitter may affect the dynamic range of the AD9287.
Power supplies for clock drivers should be separated from the
ADC output driver supplies to avoid modulating the clock signal
with digital noise. Low jitter, crystal-controlled oscillators are the
best clock sources. If the clock is generated from another type of
source (by gating, dividing, or another method), it should be
retimed by the original clock during the last step.
300
350
300
120
ENCODE (MSPS)
Refer to the AN-501 Application Note and to the AN-756
Application Note for more in-depth information about jitter
performance as it relates to ADCs at www.analog.com.
130
Figure 48. Supply Current vs. fSAMPLE for fIN = 10.3 MHz, fSAMPLE = 100 MSPS
RMS CLOCK JITTER REQUIREMENT
120
100
16 BITS
90
14 BITS
80
12 BITS
70
10 BITS
60
8 BITS
50
40
0.125ps
0.25ps
0.5ps
1.0ps
2.0ps
30
1
10
100
ANALOG INPUT FREQUENCY (MHz)
1000
05966-038
SNR (dB)
110
Figure 47. Ideal SNR vs. Input Frequency and Jitter
Rev. F | Page 22 of 51
05966-069
In this equation, the rms aperture jitter represents the root mean
square of all jitter sources, including the clock input, analog input
signal, and ADC aperture jitter. IF undersampling applications
are particularly sensitive to jitter (see Figure 47).
CURRENT (mA)
SNR Degradation = 20 × log 10(1/2 × π × fA × tJ)
Data Sheet
AD9287
By asserting the PDWN pin high, the AD9287 is placed into
power-down mode. In this state, the ADC typically dissipates
3 mW. During power-down, the LVDS output drivers are placed
into a high impedance state. If any of the SPI features are changed
before the power-down feature is enabled, the chip continues to
function after PDWN is pulled low without requiring a reset. The
AD9287 returns to normal operating mode when the PDWN
pin is pulled low. This pin is both 1.8 V and 3.3 V tolerant.
placed as close to the receiver as possible. If there is no far-end
receiver termination or there is poor differential trace routing,
timing errors may result. To avoid such timing errors, it is recommended that each trace length be less than 24 inches and that
the differential output traces be close together and at equal
lengths. An example of the FCO and data stream with proper
trace length and position is shown in Figure 49.
There are several other power-down options available when
using the SPI. The user can individually power down each
channel or put the entire device into standby mode. The latter
option allows the user to keep the internal PLL powered when
fast wake-up times (~600 ns) are required. See the Memory
Map section for more details on using these features.
Digital Outputs and Timing
The AD9287 differential outputs conform to the ANSI-644 LVDS
standard on default power-up. This can be changed to a low power,
reduced signal option (similar to the IEEE 1596.3 standard) via the
SDIO/ODM pin or SPI. The LVDS standard can further reduce the
overall power dissipation of the device by approximately 17 mW.
See the SDIO/ODM Pin section or Table 16 in the Memory Map
section for more information. The LVDS driver current is derived
on-chip and sets the output current at each output equal to a
nominal 3.5 mA. A 100 Ω differential termination resistor placed at
the LVDS receiver inputs results in a nominal 350 mV swing at
the receiver.
The AD9287 LVDS outputs facilitate interfacing with LVDS
receivers in custom ASICs and FPGAs for superior switching
performance in noisy environments. Single point-to-point net
topologies are recommended with a 100 Ω termination resistor
CH1 500mV/DIV = FCO
CH2 500mV/DIV = DATA
CH3 500mV/DIV = DCO
2.5ns/DIV
05966-056
In power-down mode, low power dissipation is achieved by
shutting down the reference, reference buffer, PLL, and biasing
networks. The decoupling capacitors on REFT and REFB are
discharged when entering power-down mode and must be
recharged when returning to normal operation. As a result, the
wake-up time is related to the time spent in the power-down
mode: shorter cycles result in proportionally shorter wake-up
times. With the recommended 0.1 μF and 2.2 μF decoupling
capacitors on REFT and REFB, approximately 1 sec is required
to fully discharge the reference buffer decoupling capacitors and
approximately 375 μs is required to restore full operation.
Figure 49. LVDS Output Timing Example in ANSI-644 Mode (Default)
An example of the LVDS output using the ANSI-644 standard
(default) data eye and a time interval error (TIE) jitter histogram
with trace lengths less than 24 inches on standard FR-4 material is
shown in Figure 50. Figure 51 shows an example of trace lengths
exceeding 24 inches on standard FR-4 material. Notice that the
TIE jitter histogram reflects the decrease of the data eye opening
as the edge deviates from the ideal position. It is the user’s responsibility to determine if the waveforms meet the timing budget of
the design when the trace lengths exceed 24 inches. Additional SPI
options allow the user to further increase the internal termination
(increasing the current) of all four outputs in order to drive longer
trace lengths (see Figure 52). Even though this produces sharper
rise and fall times on the data edges and is less prone to bit errors,
the power dissipation of the DRVDD supply increases when this
option is used. In addition, notice in Figure 52 that the histogram
is improved compared with that shown in Figure 51. See the
Memory Map section for more details.
Rev. F | Page 23 of 51
AD9287
Data Sheet
EYE: ALL BITS
ULS: 10000/15600
EYE: ALL BITS
400
EYE DIAGRAM VOLTAGE (V)
EYE DIAGRAM VOLTAGE (V)
500
0
ULS: 9599/15599
200
0
–200
–400
–500
–1.0ns
–0.5ns
0ns
0.5ns
–1.0ns
1.0ns
–0.5ns
0ns
0.5ns
1.0ns
50
0
–100ps
0ps
100ps
0
–150ps
Figure 50. Data Eye for LVDS Outputs in ANSI-644 Mode with Trace Lengths
Less than 24 Inches on Standard FR-4, External 100 Ω Far Termination Only
EYE: ALL BITS
EYE DIAGRAM VOLTAGE (V)
200
ULS: 9600/15600
–100ps
–50ps
0ps
50ps
100ps
150ps
Figure 52. Data Eye for LVDS Outputs in ANSI-644 Mode with 100 Ω Internal
Termination on and Trace Lengths Greater than 24 Inches on Standard FR-4,
External 100 Ω Far Termination Only
The format of the output data is offset binary by default. An
example of the output coding format can be found in Table 8.
To change the output data format to twos complement, see the
Memory Map section.
0
Table 8. Digital Output Coding
Code
255
128
127
0
–200
–1.0ns
–0.5ns
0ns
0.5ns
1.0ns
100
50
0
–150ps
(VIN + x) − (VIN − x),
Input Span = 2 V p-p (V)
+1.00
0.00
−0.007813
−1.00
Digital Output Offset Binary
(D7 ... D0)
1111 1111
1000 0000
0111 1111
0000 0000
Data from each ADC is serialized and provided on a separate
channel. The data rate for each serial stream is equal to 8 bits
times the sample clock rate, with a maximum of 800 Mbps
(8 bits × 100 MSPS = 800 Mbps). The lowest typical conversion
rate is 10 MSPS. However, if lower sample rates are required for
a specific application, the PLL can be set up via the SPI to allow
encode rates as low as 5 MSPS. See the Memory Map section for
details on enabling this feature.
–100ps
–50ps
0ps
50ps
100ps
150ps
05966-044
TIE JITTER HISTOGRAM (Hits)
50
05966-042
TIE JITTER HISTOGRAM (Hits)
100
05966-043
TIE JITTER HISTOGRAM (Hits)
100
Figure 51. Data Eye for LVDS Outputs in ANSI-644 Mode with Trace Lengths
Greater than 24 Inches on Standard FR-4, External 100 Ω Far Termination Only
Rev. F | Page 24 of 51
Data Sheet
AD9287
Two output clocks are provided to assist in capturing data from
the AD9287. The DCO is used to clock the output data and is
equal to four times the sample clock (CLK) rate. Data is clocked
out of the AD9287 and must be captured on the rising and
falling edges of the DCO that supports double data rate (DDR)
capturing. The FCO is used to signal the start of a new output
byte and is equal to the sample clock rate. See the timing
diagram shown in Figure 2 for more information.
Table 9. Flexible Output Test Modes
Output Test Mode
Bit Sequence
0000
0001
Pattern Name
Off (default)
Midscale short
0010
+Full-scale short
0011
−Full-scale short
0100
Checkerboard
0101
0110
0111
PN sequence long1
PN sequence short1
One-/zero-word toggle
1000
1001
User input
1-/0-bit toggle
1010
1× sync
1011
One bit high
1100
Mixed frequency
1
Digital Output Word 1
N/A
1000 0000 (8-bit)
10 0000 0000 (10-bit)
1000 0000 0000 (12-bit)
10 0000 0000 0000 (14-bit)
1111 1111 (8-bit)
11 1111 1111 (10-bit)
1111 1111 1111 (12-bit)
11 1111 1111 1111 (14-bit)
0000 0000 (8-bit)
00 0000 0000 (10-bit)
0000 0000 0000 (12-bit)
00 0000 0000 0000 (14-bit)
1010 1010 (8-bit)
10 1010 1010 (10-bit)
1010 1010 1010 (12-bit)
10 1010 1010 1010 (14-bit)
N/A
N/A
1111 1111 (8-bit)
11 1111 1111 (10-bit)
1111 1111 1111 (12-bit)
11 1111 1111 1111 (14-bit)
Register 0x19 to Register 0x1A
1010 1010 (8-bit)
10 1010 1010 (10-bit)
1010 1010 1010 (12-bit)
10 1010 1010 1010 (14-bit)
0000 1111 (8-bit)
00 0001 1111 (10-bit)
0000 0011 1111 (12-bit)
00 0000 0111 1111 (14-bit)
1000 0000 (8-bit)
10 0000 0000 (10-bit)
1000 0000 0000 (12-bit)
10 0000 0000 0000 (14-bit)
1010 0011 (8-bit)
10 0110 0011 (10-bit)
1010 0011 0011 (12-bit)
10 1000 0110 0111 (14-bit)
Digital Output Word 2
N/A
Same
Subject to Data
Format Select
N/A
Yes
Same
Yes
Same
Yes
0101 0101 (8-bit)
01 0101 0101 (10-bit)
0101 0101 0101 (12-bit)
01 0101 0101 0101 (14-bit)
N/A
N/A
0000 0000 (8-bit)
00 0000 0000 (10-bit)
0000 0000 0000 (12-bit)
00 0000 0000 0000 (14-bit)
Register 0x1B to Register 0x1C
N/A
No
Yes
Yes
No
No
No
N/A
No
N/A
No
N/A
No
All test mode options except PN sequence short and PN sequence long can support 8- to 14-bit word lengths in order to verify data capture to the receiver.
Rev. F | Page 25 of 51
AD9287
Data Sheet
When the SPI is used, the DCO phase can be adjusted in 60°
increments relative to the data edge. This enables the user to refine
system timing margins if required. The default DCO+ and DCO−
timing, as shown in Figure 2, is 90° relative to the output data edge.
A 10-, 12-, or 14-bit serial stream can also be initiated from the
SPI. This allows the user to implement and test compatibility with
higher resolution systems. However, when using the 12-bit option,
the data stream stuffs four 0s at the end of the 12-bit serial data
(see Figure 3).
When the SPI is used, all of the data outputs can also be
inverted from their nominal state. This is not to be confused
with inverting the serial stream to an LSB-first mode. In default
mode, as shown in Figure 2, the MSB is first in the data output
serial stream. However, this can be inverted so that the LSB is
first in the data output serial stream (see Figure 4).
There are 12 digital output test pattern options available that
can be initiated through the SPI. This is a useful feature when
validating receiver capture and timing. Refer to Table 9 for the
output bit sequencing options available. Some test patterns have
two serial sequential words and can be alternated in various ways,
depending on the test pattern chosen. Note that some patterns do
not adhere to the data format select option. In addition, custom
user-defined test patterns can be assigned in the 0x19, 0x1A,
0x1B, and 0x1C register addresses. All test mode options except
PN sequence short and PN sequence long can support 8- to 14-bit
word lengths in order to verify data capture to the receiver.
The PN sequence short pattern produces a pseudorandom bit
sequence that repeats itself every 29 − 1 or 511 bits. A description
of the PN sequence and how it is generated can be found in
Section 5.1 of the ITU-T 0.150 (05/96) standard. The only
difference is that the starting value must be a specific value
instead of all 1s (see Table 10 for the initial values).
Table 10. PN Sequence
Sequence
PN Sequence Short
PN Sequence Long
Initial
Value
0x0df
0x029b80
First Three Output Samples
(MSB First)
0xbf, 0x93, 0x53
0xf5, 0x91, 0xfd
Consult the Memory Map section for information on how to
change these additional digital output timing features through
the SPI.
SDIO/ODM Pin
The SDIO/ODM pin is for use in applications that do not require
SPI mode operation. This pin can enable a low power, reduced
signal option (similar to the IEEE 1596.3 reduced range link
output standard) if it and the CSB pin are tied to AVDD during
device power-up. This option should only be used when the
digital output trace lengths are less than 2 inches from the LVDS
receiver. When this option is used, the FCO, DCO, and outputs
function normally, but the LVDS signal swing of all channels is
reduced from 350 mV p-p to 200 mV p-p, allowing the user to
further reduce the power on the DRVDD supply.
For applications where this pin is not used, it should be tied low.
In this case, the device pin can be left open, and the 30 kΩ internal
pull-down resistor pulls this pin low. This pin is only 1.8 V tolerant.
If applications require this pin to be driven from a 3.3 V logic level,
insert a 1 kΩ resistor in series with this pin to limit the current.
Table 11. Output Driver Mode Pin Settings
Selected ODM
Normal
Operation
ODM
The PN sequence long pattern produces a pseudorandom bit
sequence that repeats itself every 223 − 1 or 8,388,607 bits. A
description of the PN sequence and how it is generated can be
found in Section 5.6 of the ITU-T 0.150 (05/96) standard. The
only differences are that the starting value must be a specific
value instead of all 1s (see Table 10 for the initial values) and the
AD9287 inverts the bit stream with relation to the ITU standard.
Rev. F | Page 26 of 51
ODM Voltage
10 kΩ to AGND
AVDD
Resulting
Output Standard
ANSI-644
(default)
Low power,
reduced
signal option
Resulting
FCO and DCO
ANSI-644
(default)
Low power,
reduced
signal option
Data Sheet
AD9287
SCLK/DTP Pin
RBIAS Pin
The SCLK/DTP pin is for use in applications that do not require
SPI mode operation. This pin can enable a single digital test
pattern if it and the CSB pin are held high during device powerup. When SCLK/DTP is tied to AVDD, the ADC channel
outputs shift out the following pattern: 1000 0000. The FCO
and DCO function normally while all channels shift out the
repeatable test pattern. This pattern allows the user to perform
timing alignment adjustments among the FCO, DCO, and output
data. For normal operation, this pin should be tied to AGND
through a 10 kΩ resistor. This pin is both 1.8 V and 3.3 V
tolerant.
To set the internal core bias current of the ADC, place a resistor
(nominally equal to 10.0 kΩ) to ground at the RBIAS pin. The
resistor current is derived on-chip and sets the AVDD current of
the ADC to a nominal 260 mA at 100 MSPS. Therefore, it is
imperative that at least a 1% tolerance on this resistor be used to
achieve consistent performance.
Table 12. Digital Test Pattern Pin Settings
Selected DTP
Normal
Operation
DTP
DTP Voltage
10 kΩ to AGND
AVDD
Resulting
D + x and D − x
Normal
operation
1000 0000
Resulting
FCO and DCO
Normal operation
Normal operation
Additional and custom test patterns can also be observed when
commanded from the SPI port. Consult the Memory Map
section for information about the options available.
Voltage Reference
A stable, accurate 0.5 V voltage reference is built into the
AD9287. This is gained up internally by a factor of 2, setting
VREF to 1.0 V, which results in a full-scale differential input span
of 2 V p-p. The VREF is set internally by default; however, the
VREF pin can be driven externally with a 1.0 V reference to
improve accuracy.
When applying the decoupling capacitors to the VREF, REFT,
and REFB pins, use ceramic low ESR capacitors. These capacitors
should be close to the ADC pins and on the same layer of the
PCB as the AD9287. The recommended capacitor values and
configurations for the AD9287 reference pin are shown in
Figure 53.
Table 13. Reference Settings
CSB Pin
The CSB pin should be tied to AVDD for applications that do
not require SPI mode operation. By tying CSB high, all SCLK
and SDIO information is ignored. This pin is both 1.8 V and
3.3 V tolerant.
Selected Mode
External
Reference
Internal,
2 V p-p FSR
Rev. F | Page 27 of 51
SENSE Voltage
AVDD
Resulting VREF (V)
N/A
AGND to 0.2 V
1.0
Resulting
Differential
Span (V p-p)
2 × external
reference
2.0
AD9287
Data Sheet
Internal Reference Operation
External Reference Operation
A comparator within the AD9287 detects the potential at the
SENSE pin and configures the reference. If SENSE is grounded,
the reference amplifier switch is connected to the internal
resistor divider (see Figure 53), setting VREF to 1 V.
The use of an external reference may be necessary to enhance
the gain accuracy of the ADC or to improve thermal drift
characteristics. Figure 56 shows the typical drift characteristics
of the internal reference in 1 V mode.
The REFT and REFB pins establish the input span of the ADC
core from the reference configuration. The analog input fullscale range of the ADC equals twice the voltage of the reference
pin for either an internal or an external reference configuration.
When the SENSE pin is tied to AVDD, the internal reference is
disabled, allowing the use of an external reference. The external
reference is loaded with an equivalent 6 kΩ load. An internal
reference buffer generates the positive and negative full-scale
references, REFT and REFB, for the ADC core. Therefore, the
external reference must be limited to a nominal 1.0 V.
If the reference of the AD9287 is used to drive multiple
converters to improve gain matching, the loading of the reference by the other converters must be considered. Figure 55
depicts how the internal reference voltage is affected by loading.
5
0
–5
VIN – x
VREF ERROR (%)
VIN + x
REFT
ADC
CORE
0.1µF
0.1µF
+
2.2µF
REFB
–15
–20
0.1µF
VREF
–25
0.1µF
05966-083
1µF
–10
0.5V
SELECT
LOGIC
–30
0
0.5
SENSE
1.0
1.5
2.0
2.5
3.0
3.5
CURRENT LOAD (mA)
Figure 55. VREF Error vs. Load
05966-010
0.02
0
–0.02
Figure 53. Internal Reference Configuration
VREF ERROR (%)
–0.04
VIN + x
VIN – x
REFT
ADC
CORE
+
2.2µF
–0.10
–0.12
–0.14
05966-084
0.1µF
VREF
–0.16
0.1µF1
AVDD
0.1µF
–0.08
REFB
EXTERNAL
REFERENCE
1µF1
0.1µF
–0.06
0.5V
–0.18
–40
SELECT
LOGIC
–20
0
20
40
TEMPERATURE (°C)
SENSE
05966-089
Figure 56. VREF Error vs. Temperature
1OPTIONAL.
Figure 54. External Reference Operation
Rev. F | Page 28 of 51
60
80
Data Sheet
AD9287
SERIAL PORT INTERFACE (SPI)
The AD9287 serial port interface allows the user to configure the
converter for specific functions or operations through a structured
register space provided in the ADC. This may provide the user
with additional flexibility and customization, depending on the
application. Addresses are accessed via the serial port and can
be written to or read from via the port. Memory is organized
into bytes that can be further divided into fields, as documented
in the Memory Map section. Detailed operational information
can be found in the AN-877 Application Note, Interfacing to
High Speed ADCs via SPI at www.analog.com.
There are three pins that define the SPI: SCLK, SDIO, and CSB
(see Table 14). The SCLK pin is used to synchronize the read
and write data presented to the ADC. The SDIO pin is a dualpurpose pin that allows data to be sent to and read from the
internal ADC memory map registers. The CSB pin is an active
low control that enables or disables the read and write cycles.
Table 14. Serial Port Pins
Pin
SCLK
SDIO
CSB
Function
Serial Clock. The serial shift clock input. SCLK is used to
synchronize serial interface reads and writes.
Serial Data Input/Output. A dual-purpose pin. The typical
role for this pin is as an input or output, depending on
the instruction sent and the relative position in the
timing frame.
Chip Select Bar (Active Low). This control gates the read
and write cycles.
The falling edge of the CSB in conjunction with the rising edge of
the SCLK determines the start of the framing sequence. During
an instruction phase, a 16-bit instruction is transmitted followed by
one or more data bytes, which is determined by Bit Field W0
and Bit Field W1. An example of the serial timing and its
definitions can be found in Figure 58 and Table 15. During
normal operation, CSB is used to signal to the device that SPI
commands are to be received and processed. When CSB is
brought low, the device processes SCLK and SDIO to obtain
instructions. Normally, CSB remains low until the communication
cycle is complete. However, if connected to a slow device, CSB
can be brought high between bytes, allowing older microcontrollers
enough time to transfer data into shift registers. CSB can be
stalled when transferring one, two, or three bytes of data. When
W0 and W1 are set to 11, the device enters streaming mode and
continues to process data, either reading or writing, until
CSB is taken high to end the communication cycle. This allows
complete memory transfers without requiring additional instructions. Regardless of the mode, if CSB is taken high in the middle
of a byte transfer, the SPI state machine is reset and the device
waits for a new instruction.
In addition to the operation modes, the SPI port configuration
influences how the AD9287 operates. For applications that do
not require a control port, the CSB line can be tied and held high.
This places the remainder of the SPI pins into their secondary
modes, as defined in the SDIO/ODM Pin and SCLK/DTP Pin
sections. CSB can also be tied low to enable 2-wire mode. When
CSB is tied low, SCLK and SDIO are the only pins required for
communication. Although the device is synchronized during
power-up, the user should ensure that the serial port remains
synchronized with the CSB line when using this mode. When
operating in 2-wire mode, it is recommended to use a 1-, 2-,
or 3-byte transfer exclusively. Without an active CSB line,
streaming mode can be entered but not exited.
In addition to word length, the instruction phase determines if
the serial frame is a read or write operation, allowing the serial
port to be used to both program the chip and read the contents
of the on-chip memory. If the instruction is a readback operation,
performing a readback causes the SDIO pin to change from an
input to an output at the appropriate point in the serial frame.
Data can be sent in MSB- or LSB-first mode. MSB-first mode
is the default at power-up and can be changed by adjusting the
configuration register. For more information about this and
other features, see the AN-877 Application Note, Interfacing to
High Speed ADCs via SPI at www.analog.com.
HARDWARE INTERFACE
The pins described in Table 14 compose the physical interface
between the user’s programming device and the serial port of
the AD9287. The SCLK and CSB pins function as inputs when
using the SPI. The SDIO pin is bidirectional, functioning as an
input during write phases and as an output during readback.
If multiple SDIO pins share a common connection, care should
be taken to ensure that proper VOH levels are met. Assuming the
same load for each AD9287, Figure 57 shows the number of SDIO
pins that can be connected together and the resulting VOH level.
This interface is flexible enough to be controlled by either serial
PROMS or PIC microcontrollers, providing the user with an
alternative method, other than a full SPI controller, to program
the ADC (see the AN-812 Application Note at
www.analog.com).
Rev. F | Page 29 of 51
Data Sheet
1.800
1.795
1.790
1.785
1.780
1.775
1.770
1.765
1.760
1.755
1.750
1.745
1.740
1.735
1.730
1.725
1.720
1.715
If the user chooses not to use the SPI, these dual-function pins
serve their secondary functions when the CSB is strapped to
AVDD during device power-up. See the Theory of Operation
section for details on which pin-strappable functions are
supported on the SPI pins.
For users who wish to operate the ADC without using the SPI,
remove any connections from the CSB, SCLK/DTP, and SDIO/
ODM pins. By disconnecting these pins from the control bus, the
ADC can function in its most basic operation. Each of these pins
has an internal termination that floats to its respective level.
0
10
20
30
40
50
60
70
80
90
100
NUMBER OF SDIO PINS CONNECTED TOGETHER
05966-090
VOH (V)
AD9287
Figure 57. SDIO Pin Loading
tDS
tS
tHI
tH
tCLK
tDH
tLO
CSB
SCLK DON’T CARE
R/W
W1
W0
A12
A11
A10
A9
A8
A7
D5
D4
D3
D2
D1
D0
DON’T CARE
05966-012
SDIO DON’T CARE
DON’T CARE
Figure 58. Serial Timing Details
Table 15. Serial Timing Definitions
Parameter
tDS
tDH
tCLK
tS
tH
tHI
tLO
tEN_SDIO
Timing (Minimum, ns)
5
2
40
5
2
16
16
10
tDIS_SDIO
10
Description
Setup time between the data and the rising edge of SCLK
Hold time between the data and the rising edge of SCLK
Period of the clock
Setup time between CSB and SCLK
Hold time between CSB and SCLK
Minimum period that SCLK should be in a logic high state
Minimum period that SCLK should be in a logic low state
Minimum time for the SDIO pin to switch from an input to an output relative to the SCLK
falling edge (not shown in Figure 58)
Minimum time for the SDIO pin to switch from an output to an input relative to the SCLK
rising edge (not shown in Figure 58)
Rev. F | Page 30 of 51
Data Sheet
AD9287
MEMORY MAP
READING THE MEMORY MAP TABLE
RESERVED LOCATIONS
Each row in the memory map register table (Table 16) has eight
address locations. The memory map is divided into three sections:
the chip configuration register map (Address 0x00 to Address 0x02),
the device index and transfer register map (Address 0x05 and
Address 0xFF), and the ADC functions register map (Address 0x08
to Address 0x22).
Undefined memory locations should not be written to except
when writing the default values suggested in this data sheet.
Addresses that have values marked as 0 should be considered
reserved and have a 0 written into their registers during power-up.
The leftmost column of the memory map indicates the register
address number, and the default value is shown in the second
rightmost column. The (MSB) Bit 7 column is the start of the
default hexadecimal value given. For example, Address 0x09, the
clock register, has a default value of 0x01, meaning that Bit 7 = 0,
Bit 6 = 0, Bit 5 = 0, Bit 4 = 0, Bit 3 = 0, Bit 2 = 0, Bit 1 = 0, and
Bit 0 = 1, or 0000 0001 in binary. This setting is the default for
the duty cycle stabilizer in the on condition. By writing a 0 to Bit 6
of this address followed by a 0x01 in Register 0xFF (transfer bit),
the duty cycle stabilizer turns off. It is important to follow each
writing sequence with a transfer bit to update the SPI registers. For
more information on this and other functions, consult the AN-877
Application Note, Interfacing to High Speed ADCs via SPI at
www.analog.com.
DEFAULT VALUES
When the AD9287 comes out of a reset, critical registers are
preloaded with default values. These values are indicated in
Table 16, where an X refers to an undefined feature.
LOGIC LEVELS
An explanation of various registers follows: “Bit is set” is
synonymous with “bit is set to Logic 1” or “writing Logic 1 for
the bit.” Similarly, “clear a bit” is synonymous with “bit is set to
Logic 0” or “writing Logic 0 for the bit.”
Rev. F | Page 31 of 51
AD9287
Data Sheet
Table 16. Memory Map Register
Addr.
(MSB)
(Hex) Register Name
Bit 7
Chip Configuration Registers
00
chip_port_config 0
01
chip_id
02
chip_grade
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
LSB first
1 = on
0 = off
(default)
Soft
reset
1 = on
0 = off
(default)
1
1
Soft
reset
1 = on
0 = off
(default)
LSB first
1 = on
0 = off
(default)
(LSB)
Bit 0
Default
Value
(Hex)
0
0x18
8-bit Chip ID Bits [7:0]
(AD9287 = 0x05), (default)
X
Child ID [6:4]
(identify device variants of Chip ID)
011 = 100 MSPS
Device Index and Transfer Registers
05
device_index_A
X
X
FF
X
ADC Functions
08
modes
09
0D
0x05
The nibbles
should be
mirrored so that
LSB- or MSB-first
mode is set correctly regardless
of shift mode.
Default is unique
chip ID, different
for each device.
This is a readonly register.
Child ID used to
differentiate
graded devices.
X
X
X
X
Read
only
Data
Channel
C
1 = on
(default)
0 = off
X
Data
Channel
B
1 = on
(default)
0 = off
X
Data
Channel
A
1 = on
(default)
0 = off
SW
transfer
1 = on
0 = off
(default)
0x0F
Bits are set to
determine which
on-chip device
receives the next
write command.
0x00
Synchronously
transfers data
from the master
shift register to
the slave.
0x00
Determines
various generic
modes of chip
operation.
0x01
Turns the
internal duty
cycle stabilizer
on and off.
0x00
When this register is set, the
test data is placed
on the output
pins in place of
normal data.
X
Clock
Channel
DCO
1 = on
0 = off
(default)
X
Clock
Channel
FCO
1 = on
0 = off
(default)
X
Data
Channel
D
1 = on
(default)
0 = off
X
X
X
X
X
clock
X
X
X
X
test_io
User test mode
00 = off (default)
01 = on, single alternate
10 = on, single once
11 = on, alternate once
Reset
PN long
gen
1 = on
0 = off
(default)
Reset
PN short
gen
1 = on
0 = off
(default)
Internal power-down mode
000 = chip run (default)
001 = full power-down
010 = standby
011 = reset
Duty
X
X
X
cycle
stabilizer
1 = on
(default)
0 = off
Output test mode—see Table 9 in the
Digital Outputs and Timing section
0000 = off (default)
0001 = midscale short
0010 = +FS short
0011 = −FS short
0100 = checkerboard output
0101 = PN 23 sequence
0110 = PN 9 sequence
0111 = one-/zero-word toggle
1000 = user input
1001 = 1-/0-bit toggle
1010 = 1× sync
1011 = one bit high
1100 = mixed bit frequency
(format determined by output_mode)
device_update
Default Notes/
Comments
X
Rev. F | Page 32 of 51
Data Sheet
AD9287
Addr.
(Hex)
14
Register Name
output_mode
(MSB)
Bit 7
X
15
output_adjust
16
Bit 5
X
X
Bit 6
0 = LVDS
ANSI-644
(default)
1 = LVDS
low power
(IEEE
1596.3
similar)
X
output_phase
X
19
user_patt1_lsb
1A
Bit 4
X
(LSB)
Bit 0
Bit 1
00 = offset binary
(default)
01 = twos
complement
Default
Value
(Hex)
0x00
Bit 3
X
Bit 2
Output
invert
1 = on
0 = off
(default)
Output driver
termination
00 = none (default)
01 = 200 Ω
10 = 100 Ω
11 = 100 Ω
X
X
X
X
X
B7
B6
B5
B4
0011 = output clock phase adjust
(0000 through 1010)
0000 = 0° relative to data edge
0001 = 60° relative to data edge
0010 = 120° relative to data edge
0011 = 180° relative to data edge (default)
0101 = 300° relative to data edge
0110 = 360° relative to data edge
1000 = 480° relative to data edge
1001 = 540° relative to data edge
1010 = 600° relative to data edge
1011 to 1111 = 660° relative to data edge
B3
B2
B1
B0
0x00
user_patt1_msb
B15
B14
B13
B12
B11
B10
B9
B8
0x00
1B
user_patt2_lsb
B7
B6
B5
B4
B3
B2
B1
B0
0x00
1C
user_patt2_msb
B15
B14
B13
B12
B11
B10
B9
B8
0x00
21
serial_control
LSB first
1 = on
0 = off
(default)
X
X
X
000 = 8 bits (default, normal bit
stream)
001 = 8 bits
010 = 10 bits
011 = 12 bits
100 = 14 bits
22
serial_ch_stat
X
X
X
X
<10
MSPS,
low
encode
rate
mode
1 = on
0 = off
(default)
X
Rev. F | Page 33 of 51
X
X
Channel
output
reset
1 = on
0 = off
(default)
X
Channel
powerdown
1 = on
0 = off
(default)
0x00
0x03
0x00
0x00
Default Notes/
Comments
Configures the
outputs and the
format of the
data.
Determines
LVDS or other
output properties.
Primarily functions to set the
LVDS span and
common-mode
levels in place of
an external
resistor.
On devices that
utilize global
clock divide,
determines
which phase of
the divider
output is used to
supply the
output clock.
Internal latching
is unaffected.
User-defined
pattern, 1 LSB.
User-defined
pattern, 1 MSB.
User-defined
pattern, 2 LSB.
User-defined
pattern, 2 MSB.
Serial stream
control. Default
causes MSB first
and the native
bit stream
(global).
Used to power
down individual
sections of a
converter (local).
AD9287
Data Sheet
Power and Ground Recommendations
Exposed Paddle Thermal Heat Slug Recommendations
When connecting power to the AD9287, it is recommended
that two separate 1.8 V supplies be used: one for analog (AVDD)
and one for digital (DRVDD). If only one supply is available, it
should be routed to the AVDD first and then tapped off and
isolated with a ferrite bead or a filter choke preceded by
decoupling capacitors for the DRVDD. The user can employ
several different decoupling capacitors to cover both high and
low frequencies. These should be located close to the point of
entry at the PC board level and close to the parts, with minimal
trace lengths.
It is required that the exposed paddle on the underside of the
ADC be connected to analog ground (AGND) to achieve the
best electrical and thermal performance of the AD9287. An
exposed continuous copper plane on the PCB should mate to
the AD9287 exposed paddle, Pin 0. The copper plane should
have several vias to achieve the lowest possible resistive thermal
path for heat dissipation to flow through the bottom of the PCB.
These vias should be solder-filled or plugged.
A single PC board ground plane should be sufficient when
using the AD9287. With proper decoupling and smart partitioning of the PC board’s analog, digital, and clock sections,
optimum performance can be easily achieved.
To maximize the coverage and adhesion between the ADC
and PCB, partition the continuous copper plane by overlaying a
silkscreen on the PCB into several uniform sections. This provides
several tie points between the ADC and PCB during the reflow
process, whereas using one continuous plane with no partitions
only guarantees one tie point. See Figure 59 for a PCB layout
example. For detailed information on packaging and the PCB
layout of chip scale packages, see the AN-772 Application Note,
A Design and Manufacturing Guide for the Lead Frame Chip
Scale Package (LFCSP) at www.analog.com.
05966-013
SILKSCREEN PARTITION
PIN 1 INDICATOR
Figure 59. Typical PCB Layout
Rev. F | Page 34 of 51
Data Sheet
AD9287
EVALUATION BOARD
board individually. Use P501 to connect a different supply for
each section. At least one 1.8 V supply is needed for AVDD_DUT
and DRVDD_DUT; however, it is recommended that separate
supplies be used for analog and digital signals and that each supply
have a current capability of 1 A. To operate the evaluation board
using the VGA option, a separate 5.0 V analog supply (AVDD_5 V)
is needed. To operate the evaluation board using the SPI and alternate clock options, a separate 3.3 V analog supply (AVDD_3.3 V)
is needed in addition to the other supplies.
The AD9287 evaluation board provides all of the support circuitry required to operate the ADC in its various modes and
configurations. The converter can be driven differentially using a
transformer (default) or an AD8332 driver. The ADC can also be
driven in a single-ended fashion. Separate power pins are provided
to isolate the DUT from the drive circuitry of the AD8332. Each
input configuration can be selected by changing the connection
of various jumpers (see Figure 62 to Figure 66). Figure 60 shows
the typical bench characterization setup used to evaluate the ac
performance of the AD9287. It is critical that the signal sources
used for the analog input and clock have very low phase noise
(<1 ps rms jitter) to realize the optimum performance of the
converter. Proper filtering of the analog input signal to remove
harmonics and lower the integrated or broadband noise at the
input is also necessary to achieve the specified noise performance.
INPUT SIGNALS
When connecting the clock and analog sources to the evaluation
board, use clean signal generators with low phase noise, such as
Rohde & Schwarz SMHU or HP8644 signal generators or the
equivalent, as well as a 1 m, shielded, RG-58, 50 Ω coaxial cable.
Enter the desired frequency and amplitude from the ADC specifications tables. Typically, most Analog Devices evaluation boards
can accept approximately 2.8 V p-p or 13 dBm sine wave input
for the clock. When connecting the analog input source, it is
recommended to use a multipole, narrow-band, band-pass filter
with 50 Ω terminations. Good choices of such band-pass filters
are available from TTE, Allen Avionics, and K&L Microwave, Inc.
The filter should be connected directly to the evaluation board
if possible.
See Figure 62 to Figure 70 for the complete schematics and
layout diagrams demonstrating the routing and grounding
techniques that should be applied at the system level.
POWER SUPPLIES
This evaluation board has a wall-mountable switching power
supply that provides a 6 V, 2 A maximum output. Connect the
supply to the rated 100 V ac to 240 V ac wall outlet at 47 Hz to
63 Hz. The other end of the supply is a 2.1 mm inner diameter
jack that connects to the PCB at P503. Once on the PC board,
the 6 V supply is fused and conditioned before connecting to
three low dropout linear regulators that supply the proper bias
to each of the various sections on the board.
OUTPUT SIGNALS
The default setup uses the Analog Devices HSC-ADC-FIFO5INTZ to interface with the Analog Devices standard dual-channel
FIFO data capture board (HCS-ADC-EVALCZ). Two of the
eight channels can be evaluated at the same time. For more
information on the channel settings and optional settings of
these boards, visit www.analog.com/FIFO.
When operating the evaluation board in a nondefault condition,
L504 to L507 can be removed to disconnect the switching
power supply. This enables the user to bias each section of the
WALL OUTLET
100V TO 240V AC
47Hz TO 63Hz
+
–
+
AVDD_3.3V
GND
VCC
GND
–
GND
AVDD_5V
XFMR
INPUT
CLK
INTERPOSER
BOARD
AD9287
EVALUATION BOARD
ROHDE & SCHWARZ,
SMHU,
2V p-p SIGNAL
SYNTHESIZER
3.3V
3.3V
+
CH A TO CH D
8-BIT
SERIAL
LVDS
SPI
Figure 60. Evaluation Board Connection
Rev. F | Page 35 of 51
HSC-ADC-EVALCZ
FIFO DATA
CAPTURE
BOARD
PC
RUNNING
ADC
ANALYZER
AND SPI
USER
SOFTWARE
USB
CONNECTION
SPI
SPI
SPI
05966-014
BAND-PASS
FILTER
1.8V
–
DRVDD_DUT
–
GND
ROHDE & SCHWARZ,
SMHU,
2V p-p SIGNAL
SYNTHESIZER
1.8V
+
+
GND
5.0V
–
SWITCHING
POWER
SUPPLY
AVDD_DUT
6V DC
2A MAX
AD9287
Data Sheet
DEFAULT OPERATION AND JUMPER SELECTION
SETTINGS
A differential LVPECL clock can also be used to clock the
ADC input using the AD9515 (U202). Populate R225 and
R227 with 0 Ω resistors and remove R217 and R218 to
disconnect the default clock path inputs. In addition, populate
C207 and C208 with a 0.1 μF capacitor and remove C210 and
C211 to disconnect the default clock path outputs. The
AD9515 has many pin-strappable options that are set to a
default mode of operation. Consult the AD9515 data sheet
for more information about these and other options.
The following is a list of the default and optional settings or
modes allowed on the AD9287 Rev. A evaluation board.
•
POWER: Connect the switching power supply that is
provided with the evaluation kit between a rated 100 V ac
to 240 V ac wall outlet at 47 Hz to 63 Hz and P503.
•
AIN: The evaluation board is set up for a transformercoupled analog input with an optimum 50 Ω impedance
match of 190 MHz of bandwidth (see Figure 61). For more
bandwidth response, the differential capacitor across the
analog inputs can be changed or removed. The common
mode of the analog inputs is developed from the center tap
of the transformer or AVDD_DUT/2.
0
In addition, an on-board oscillator is available on the OSC201
and can act as the primary clock source. The setup is quick
and involves installing R212 with a 0 Ω resistor and setting
the enable jumper (J205) to the on position. If the user wishes
to employ a different oscillator, two oscillator footprint options
are available (OSC201) to check the ADC performance.
•
PDWN: To enable the power-down feature, short J201 to
AVDD on the PDWN pin.
•
SCLK/DTP: To enable the digital test patterns on the digital
outputs of the ADC, use J204. If J204 is tied to AVDD during
device power-up, Test Pattern 1000 0000 is enabled. See the
SCLK/DTP Pin section for details.
•
SDIO/ODM: To enable the low power, reduced signal option
(similar to the IEEE 1595.3 reduced range link LVDS output
standard), use J203. If J203 is tied to AVDD during device
power-up, it enables the LVDS outputs in a low power,
reduced signal option from the default ANSI-644 standard.
This option changes the signal swing from 350 mV p-p to
200 mV p-p, reducing the power of the DRVDD supply. See
the SDIO/ODM Pin section for more details.
•
CSB: To enable processing of the SPI information on the SDIO
and SCLK pins, tie J202 low in the always enable mode. To
ignore the SDIO and SCLK information, tie J202 to AVDD.
•
Non-SPI Mode: For users who wish to operate the DUT
without using SPI, remove Jumpers J202, J203, and J204.
This disconnects the CSB, SCLK/DTP, and SDIO/ODM pins
from the control bus, allowing the DUT to operate in its
simplest mode. Each of these pins has internal termination
and will float to its respective level.
•
D + x, D − x: If an alternative data capture method to the setup
shown in Figure 60 is used, optional receiver terminations,
R206 to R211, can be installed next to the high speed backplane connector.
–2
–3dB CUTOFF = 190MHz
AMPLITUDE (dBFS)
–4
–6
–8
–10
–12
–16
05966-088
–14
0
50
100
150
200
250
300
350
400
450
500
FREQUENCY (MHz)
Figure 61. Evaluation Board Full-Power Bandwidth
•
VREF: VREF is set to 1.0 V by tying the SENSE pin to ground,
R237. This causes the ADC to operate in 2.0 V p-p full-scale
range. A separate external reference option using the ADR510
is also included on the evaluation board. Populate R231 and
R235 and remove C214. Proper use of the VREF options is
noted in the Voltage Reference section.
•
RBIAS: RBIAS has a default setting of 10 kΩ (R201) to
ground and is used to set the ADC core bias current.
•
CLOCK: The default clock input circuitry is derived from a
simple transformer-coupled circuit using a high bandwidth
1:1 impedance ratio transformer (T201) that adds a very
low amount of jitter to the clock path. The clock input is
50 Ω terminated and ac-coupled to handle single-ended
sine wave types of inputs. The transformer converts the
single-ended input to a differential signal that is clipped
before entering the ADC clock inputs.
Rev. F | Page 36 of 51
Data Sheet
AD9287
ALTERNATIVE ANALOG INPUT DRIVE
CONFIGURATION
The following is a brief description of the alternative analog input
drive configuration using the AD8332 dual VGA. If this drive
option is in use, some components may need to be populated, in
which case all the necessary components are listed in Table 17. For
more details on the AD8332 dual VGA, including how it works
and its optional pin settings, consult the AD8332 data sheet.
To configure the analog input to drive the VGA instead of the
default transformer option, the following components need to
be removed and/or changed.
•
Remove R102, R115, R128, R141, R161, R162, R163, R164,
T101, T102, T103, and T104 in the default analog input path.
•
Populate R101, R114, R127, and R140 with 0 Ω resistors in
the analog input path.
•
Populate R105, R113, R118, R124, R131, R137, R151, and
R160 with 0 Ω resistors in the analog input path to connect
the AD8332.
•
Populate R152, R153, R154, R155, R156, R157, R158, R159,
C103, C105, C110, C112, C117, C119, C124, and C126
with 10 kΩ resistors to provide an input common-mode
level to the ADC analog inputs.
•
Remove R305, R306, R313, R314, R405, R406, R412, and
R424 to configure the AD8332.
In this configuration, L301 to L308 and L401 to L408 are
populated with 0 Ω resistors to allow signal connection and use
of a filter if additional requirements are necessary.
Rev. F | Page 37 of 51
AD9287
Data Sheet
AVDD_DUT
R105
DNP
R152
DNP
CH_A
FB102 R108
10Ω 33Ω
T101
1
6
R106
DNP
CM1
R103
0Ω
R102
64.9Ω
C101
0.1µF
R104
0Ω
P102
VGA INPUT CONNECTION DNP
INH1 AIN
CHANNEL A
R101
P101
DNP
AIN
2
5
3
4
CM1
VIN_A
R161
499Ω C103
DNP
C104
2.2pF
R109
1kΩ
FB103 R110
10Ω
33Ω
C105
DNP
R156
DNP
R107
DNP
R113
FB101
DNP
10Ω C102
0.1µF CH_A
CM1
VIN_A
E101
AVDD_DUT
R111
1kΩ R112
1kΩ
C106
DNP
C107
0.1µF
AVDD_DUT
AVDD_DUT
R118
DNP
VGA INPUT CONNECTION
INH2
CHANNEL B
R114
P103
DNP
AIN
R115
64.9Ω
P104
DNP
AIN
R153
DNP
CH_B
FB105 R121
10Ω 33Ω
T102
1
FB104
10Ω C108
0.1µF
2
5
3
4
R162
499Ω C110
DNP
C111
2.2pF
R123
1kΩ
FB106 R122
10Ω
33Ω
C112
DNP
R157
DNP
CM2
R120
DNP
R124
C109
DNP
0.1µF CH_B
R116
0Ω
VIN_B
R119
DNP
CM2
R117
0Ω
6
VIN_B
CM2
E102
AVDD_DUT
R125
1kΩ R126
1kΩ
C114
0.1µF
C113
DNP
AVDD_DUT
AVDD_DUT
R131
DNP
R154
DNP
CH_C
P106
VGA INPUT CONNECTION DNP
INH3 AIN
CHANNEL C
R127
P105
DNP
AIN
R128
64.9Ω
R129
0Ω
R130
0Ω
C115
0.1µF
FB108 R134
10Ω 33Ω
T103
1
6
R132
DNP
CM3
2
5
3
4
CM3
VIN_C
R163
499Ω C117
DNP
C118
2.2pF
R135
1kΩ
FB109 R136
33Ω
10Ω
C119
DNP
VIN_C
R158
DNP
R133
DNP
R137
FB107
DNP
10Ω C116
0.1µF CH_C
CM3
E103
R138
1kΩ R139
1kΩ
C121
0.1µF
C120
DNP
AVDD_DUT
AVDD_DUT
R151
DNP
VGA INPUT CONNECTION
INH4
CHANNEL D
R140
P107
DNP
AIN
R141
64.9Ω
R155
DNP
CH_D
FB111 R146
10Ω 33Ω
T104
1
P108
DNP
AIN
R142
0Ω
FB110 C122
10Ω 0.1µF
2
CM4
3
R143
0Ω C123
0.1µF CH_D
CM4
6
R144
DNP
5
4
R160
DNP
CM4
VIN_D
R164
499Ω C124
DNP
C125
2.2pF
R148
1kΩ
FB112 R147
10Ω
33Ω
C126
DNP
R159
DNP
R145
DNP
VIN_D
E104
AVDD_DUT
R149
1kΩ R150
1kΩ
C128
0.1µF
C127
DNP
DNP: DO NOT POPULATE
Figure 62. Evaluation Board Schematic, DUT Analog Inputs
Rev. F | Page 38 of 51
AVDD_DUT
05966-015
AVDD_DUT
P201
ENCODE
INPUT
ENC
DNP
P203
CLOCK CIRCUIT
ENC
AVDD
AVDD
VIN – D
VIN + D
AVDD
AVDD
CLK–
CLK+
AVDD
AVDD
DRGND
DRVDD
AD9287 LFCSP
CHC
CHC
CHB
C224
0.1µF
R216
0Ω
AVDD
AVDD
VIN – A
VIN + A
AVDD
PDWN
C216
0.1µF
R218
0Ω
R217
0Ω
OPT_CLK
OPT_CLK
5
6
2
1
R221
10kΩ
1
1
U202
2
J203
2
J202
J201
DNP
3
3
1
CR201
HSMS2812
S10 S9 S8 S7 S6 S5 S4 S3 S2 S1 S0
DNP: DO NOT POPULATE
R237
0Ω
C211
0.1µF
C210
0.1µF
19
18
22
23
R240
243Ω
R255
0Ω
R254
DNP
C209
0.1µF
DNP
C208
0.1µF
DNP
1
1
R253
0Ω
R252
DNP
CLK
E203
LVDS OUTPUT
E202
CLK
C217
0.1µF
C218
0.1µF
AVDD_3.3V
AVDD_3.3V
S10
AVDD_3.3V
S9
AVDD_3.3V
S8
AVDD_3.3V
S7
AVDD_3.3V
S6
LVPECL OUTPUT
C215
0.1µF
DNP
CLIP SINE OUT (DEFAULT)
CLK
R243
100Ω
R241
243Ω
R251
0Ω
R250
DNP
CLK
R249
0Ω
R247
0Ω
R245
0Ω
R248
DNP
R246
DNP
C207
0.1µF
DNP
AVDD_3.3V
S5
AVDD_3.3V
S4
AVDD_3.3V
S3
AVDD_3.3V
S2
AVDD_3.3V
S1
AVDD_3.3V
S0
R242
100Ω
DTP ENABLE
ODM ENABLE
R244
DNP
VREF = 1V
DNP VREF = 0.5V(1+R232/R233)
VREF = EXTERNAL
DNP
ALWAYS ENABLE SPI
PWDN ENABLE
R261
0Ω
R263
0Ω
R265
0Ω
R260
DNP
R262
DNP
R264
DNP
CHD
CHC
CHB
CHA
FCO
DCO
C219
0.1µF
C220
0.1µF
C221
0.1µF
44
45
46
47
48
49
50
A1
A2
A3
A4
A5
A6
A7
A8
A9
GNDAB1
GNDAB2
GNDAB3
GNDAB4
GNDAB5
GNDAB6
GNDAB7
GNDAB8
B1
B2
B3
B4
B5
B6
B7
B8
B9
11
12
13
14
15
16
17
18
19
HEADER 6469169-1
1
2
21
3
22
4
23
5
24
25
6
26
7
27
8
28
9
29
51
D1 41
C1
31 GNDAB10
30
C10
B10 20
10
GNDAB9
D3 43
C3
33
GNDCD2
52
32 C2GNDCD1 D2 42
53
P202
GNDCD10
60
D10
C10
GNDCD9
40
59
D9
C9
39
GNDCD8
58
D8
C8
38
GNDCD7
57
D7
C7
37
GNDCD6
56
D6
C6
36
GNDCD5
55
D5
C5
35
GNDCD4
54
D4
C4
34
GNDCD3
DIGITAL OUTPUTS
C222
0.1µF
C223
0.1µF
R205 TO R211
OPTIONAL OUTPUT
TERMINATIONS
NC = NO CONNECT
SDO_CHB
CSB4_CHB
CSB3_CHB
SDI_CHB
SCLK_CHB
R259
0Ω
R257
0Ω
R258
DNP
R256
DNP
VSENSE_DUT
VREF = 0.5V
R236
DNP
DNP
R235
DNP
R234
DNP
VREF SELECT
REMOVE C214 WHEN USING EXTERNAL VREF
C213
0.1µF R233
DNP
C214
1µF
R232
DNP
VREF_DUT
REFERENCE CIRCUIT
R231
DNP
1
3
SDIO_ODM 2
J204 3
1
SCLK_DTP 2
CSB_DUT
R202
100kΩ
R230
10kΩ
R229
4.99kΩ
GND_PAD
2 CLK
OUT0
3
OUT0B
CLKB
AD9515
SIGNAL = AVDD_3.3V;4,17,20,21,24,26,29,30
5
SYNCB
OUT1
SIGNAL = DNC;27,28
OUT1B
E201
R224
0Ω
R223
0Ω
R239
10kΩ
C212
0.1µF
V+
AVDD_DUT
R228
470kΩ
ADR510
1V
TRIM/NC
V–
OPTIONAL CLOCK DRIVE CIRCUIT
R222
4.02kΩ
AVDD_3.3V
AVDD_DUT
GND
DRVDD_DUT
AVDD_DUT
AVDD_DUT
VIN_A
VIN_A
AVDD_DUT
R226
49.9Ω
DNP
C206
0.1µF
R238
DNP
R220
DNP
T201
3
4
R227
0Ω
DNP
R225
0Ω
DNP
36
35
34
33
32
31
30
29
28
27
26
25
AVDD_3.3V
CSB
SDIO/ODM
SCLK/DTP
AVDD
DRGND
DRVDD
DISABLE
1
R219
R215
DNP
10kΩ
OPT_CLK
J205
ENABLE
R214
10kΩ
OPT_CLK
C205
0.1µF
VFAC3H-L
R213
49.9kΩ
R212
0Ω
DNP
OSC201
14 VCC
OE 1
12 VCC' OE' 3
10
5
OUT' GND'
8 OUT GND 7
2
AVDD_3.3V
CHD
CHD
OPTIONAL CLOCK
OSCILLATOR
1
2
3
4
5
6
7
8
9
10
11
12
AVDD_3.3V
AVDD_DUT
AVDD_DUT
VIN_D
VIN_D
AVDD_DUT
AVDD_DUT
CLK
CLK
AVDD_DUT
AVDD_DUT
GND
DRVDD_DUT
R201
10kΩ
CHB
CHA
CHA
FCO
FCO
U201
VIN_C
VIN_C
C203
0.1µF
AVDD_DUT
AVDD_DUT
D–D
D+D
D–C
D+C
D–B
D+B
D–A
D+A
FCO–
FCO+
DCO–
DCO+
C201
0.1µF
C202
2.2µF
VREF_DUT
VSENSE_DUT
VIN – C
VIN + C
AVDD
AVDD
REFT
REFB
VREF
SENSE
RBIAS
AVDD
VIN + B
VIN – B
48
47
46
45
44
43
42
41
40
39
38
37
AVDD_DUT
VIN_B
VIN_B
REFERENCE
DECOUPLING
RSET 32
13
14
15
16
17
18
19
20
21
22
23
24
R266
100kΩ - DNP
R203
100kΩ
VS 1
C204
0.1µF
2
DCO
DCO
R267
100kΩ - DNP
R204
100kΩ
GND 31
CW
AVDD_DUT
33
3
AVDD_DUT
U203
R205
10kΩ
1
Figure 63. Evaluation Board Schematic, DUT, VREF, Clock Inputs, and Digital Output Interface
6
7
8
9
10
11
12
13
14
15
16
25
VREF
S10
S9
S8
S7
S6
S5
S4
S3
S2
S1
S0
Rev. F | Page 39 of 51
SDO_CHA
CSB2_CHA
CSB1_CHA
SDI_CHA
SCLK_CHA
CHD R211
DNP
CHC R210
DNP
CHB R209
DNP
CHA R208
DNP
R207
FCO DNP
DCO R206
DNP
05966-016
OPTIONAL
EXT REF
Data Sheet
AD9287
CH_C
JP301
R311
10kΩ
DNP
C310
0.1µF
VOL2
VOH2
COMM
19
18
17
C309
1000pF
R310
187Ω
INH2
VPS2
LON2
RCLMP
GAIN
MODE
VCM2
VIN2
VIP2
COM2
LOP2
16
15
14
13
12
11
10
9
C321
0.1µF
R314
10kΩ
DNP
VG
C313
0.1µF
C314
0.1µF
R317
274Ω
C322
0.018µF
C318
22pF
C325
0.1µF
C326
10µF
R318
10kΩ
C323
22pF
L309
120nH
INH4
L310
120nH
C324
0.1µF
INH3
Figure 64. Evaluation Board Schematic, Optional DUT Analog Input Drive and SPI Interface Circuit
Rev. F | Page 40 of 51
05966-017
C319
0.1µF
DNP: DO NOT POPULATE
C308
0.1µF
6
7
8
4
5
C320
0.1µF
AVDD_5V
C317
0.018µF
LMD1
LMD2
AD8332
AVDD_5V
R316
274Ω
NC
22
21
COMM
VOH1
ENBV
ENBL
HILO
VCM1
VIN1
VIP1
COM1
LOP1
R306
374Ω
R309
187Ω
VOL1
VPSV
24
23
R308
187Ω
1
2
3
C316
0.1µF
AVDD_5V
C306 C307
0.1µF 0.1µF
LON1
VPS1
INH1
U301
C304
DNP L308
0Ω
R304
DNP
RCLAMP PIN
HILO PIN = LO = ±50mV
HILO PIN = H = ±75mV
L306 L307
0Ω
0Ω
EXTERNAL VARIABLE GAIN DRIVE
VG
1
VARIABLE GAIN CIRCUIT
(0V TO 1.0V DC) VG
2
GND
CW
AVDD_5V
R320
R319
39kΩ
10kΩ
MODE PIN
POSITIVE GAIN SLOPE = 0V TO 1.0V
NEGATIVE GAIN SLOPE = 2.25V TO 5.0V
C303
L305 DNP
0Ω R303
DNP
20
POWER DOWN ENABLE
(0V TO 1V = DISABLE POWER)
AVDD_5V
C315
10µF
C302
L302 L303 DNP L304
0Ω
0Ω
0Ω
R307
187Ω
C312
0.1µF
R315
10kΩ
C301
L301 DNP
0Ω
R305
374Ω
25
26
27
28
29
30
31
32
C311
0.1µF
R302
DNP
C305
0.1µF
R312
10kΩ
R313
10kΩ
DNP
HILO PIN
HI GAIN RANGE = 2.25V TO 5.0V
LO GAIN RANGE = 0V TO 1.0V
OPTIONAL VGA DRIVE CIRCUIT FOR CHANNEL C AND CHANNEL D
R301
DNP
AVDD_5V
CH_D
POPULATE L301 TO L308 WITH
0Ω RESISTORS OR DESIGN
YOUR OWN FILTER.
CH_C
Data Sheet
CH_D
AD9287
HILO PIN
HI GAIN RANGE = 2.25V TO 5.0V
LO GAIN RANGE = 0V TO 1.0V
R414
10kΩ
R412
10kΩ
DNP
AVDD_5V
OPTIONAL VGA DRIVE CIRCUIT FOR CHANNEL A AND CHANNEL B
POWER DOWN ENABLE
(0V TO 1V = DISABLE POWER)
C413
10µF
C410
0.1µF
C409
0.1µF
C414
0.1µF
25
26
27
28
29
30
31
32
CH_B
R407
187Ω
C415
0.018µF
R415
274Ω
ENBV
ENBL
HILO
VCM1
VIN1
VIP1
COM1
LOP1
U401
CH_B
R408
187Ω
R405
374Ω
Figure 65. Evaluation Board Schematic, Optional DUT Analog Input Drive and SPI Interface Circuit (Continued)
AD8332
L409
120nH
C416
0.1µF
INH2
C419
0.1µF
C418
22pF
C406 C407
0.1µF 0.1µF
AVDD_5V
C405
0.1µF
24
23
L406 L407
0Ω
0Ω
20
NC
22
21
VOL1
VPSV
R409
187Ω
C422
0.1µF
L410
120nH
C421
22pF
INH1
C417
0.1µF
VG
R413
10kΩ
DNP
C423
0.1µF
R424
10kΩ
DNP
DNP: DO NOT POPULATE
C426 R417
10µF 10kΩ
C424
0.1µF
C412
0.1µF
POPULATE L401 TO L408 WITH
0Ω RESISTORS OR DESIGN
YOUR OWN FILTER.
C425
0.1µF
16
15
14
13
12
11
10
9
R410
187Ω
C411
1000pF
C408
0.1µF
RCLMP
GAIN
MODE
VCM2
VIN2
VIP2
COM2
LOP2
R406
374Ω
LMD1
LMD2
COMM
VOH1
1
2
3
LON1
VPS1
INH1
AVDD_5V
R411
10kΩ
CH_A
C404
DNP L408
0Ω
R404
DNP
CH_A
4
5
AVDD_5V
RCLAMP PIN
HILO PIN = LO = ±50mV
HILO PIN = H = ±75mV
MODE PIN
POSITIVE GAIN SLOPE = 0V TO 1.0V
NEGATIVE GAIN SLOPE = 2.25V TO 5.0V
19
18
17
VOL2
VOH2
COMM
INH2
VPS2
LON2
AVDD_5V
6
7
8
R416
C420
0.018µF 274Ω
S401
3
4
RESET/REPROGRAM
1
2
C427
0.1µF
8
VSS
7
GP0
6
GP1
CR401
MCLR/
GP2 5
GP3
PIC12F629
R419
261Ω
4
1 VDD
2
GP5
3
GP4
U402
AVDD_5V
J402
AVDD_3.3V
E401
+5V = PROGRAMMING = AVDD_5V
+3.3V = NORMAL OPERATION = AVDD_3.3V
R418
4.75kΩ
OPTIONAL
PIC PROGRAMMING HEADER
SPI CIRCUITRY FROM FIFO
CSB1_CHA
R423
0Ω, DNP
R422
0Ω, DNP
R421
0Ω, DNP
R426
0Ω
C403
L405 DNP
0Ω R403
DNP
MCLR/GP3
10
8
6
9
7 MCLR/GP3
5 GP0
3 GP1
PICVCC
4
GP0
GP1
R430
10kΩ
R429
10kΩ
R425
10kΩ
SCLK_CHA
R428
0Ω
C402
L402 L403 DNP L404
0Ω
0Ω
0Ω
J401
SDI_CHA
R420
0Ω
C401
L401 DNP
0Ω
1
2
Rev. F | Page 41 of 51
PICVCC
SDO_CHA
VCC 5
Y2 4
U404
2 GND
3 A2
VCC 5
Y2 4
NC7WZ16
Y1 6
1 A1
U403
2 GND
3 A2
C428
0.1µF
SCLK_DTP
AVDD_DUT
CSB_DUT
C429
0.1µF
AVDD_DUT
R431
1kΩ
AVDD_DUT
SDIO_ODM
R433
1kΩ
AVDD_3.3V
REMOVE WHEN USING
OR PROGRAMMING PIC (U402)
R432
NC7WZ07
1kΩ
Y1 6
1 A1
R427
0Ω
R402
DNP
05966-018
R401
DNP
Data Sheet
AD9287
1
3
2
+
C501
10µF
3.3V_AVDD
DUT_DRVDD
P4 4
P5 5
P6 6
P7 7
3
INPUT
L501
10µH
L508
10µH
L502
10µH
L503
10µH
OUTPUT4
2
OUTPUT1
4
OUTPUT4
4
2
2
FER501
L505
10µH
C513
1µF
L504
10µH
+3.3V AVDD_3.3V
DUT_DRVDD
DUT_AVDD
C507
0.1µF
C534
1µF
PWR_IN
C532
1µF
PWR_IN
3
3
C517
0.1µF
C525
0.1µF
C527
0.1µF
C519
0.1µF
INPUT
2
OUTPUT4 4
OUTPUT1
ADP3339AKC-5
INPUT
2
OUTPUT4 4
OUTPUT1
ADP3339AKC-3.3
U502
C516
0.1µF
C524
0.1µF
C526
0.1µF
C518
0.1µF
DECOUPLING CAPACITORS
U504
DRVDD_DUT +1.8V DRVDD_DUT
C509
0.1µF
AVDD_3.3V
C505
0.1µF
AVDD_5V
R501
261Ω
CR501
PWR_IN
+1.8V AVDD_DUT
+5.0V
D502
3A
SHOT_RECT
DO-214AB
AVDD_DUT
C503
0.1µF
AVDD_5V
4
3
CHOKE_COIL
1
C515
1µF
C506
10µF
C508
10µF
C504
10µF
C502
10µF
D501
S2A_RECT
2A
DO-214AA
OUTPUT1
ADP3339AKC-1.8
U503
INPUT
ADP3339AKC-1.8
DNP: DO NOT POPULATE
C512
1µF
PWR_IN
C514
1µF
PWR_IN
3
DUT_AVDD
P2 2
P3 3
U501
5V_AVDD
P501
P1 1
P8 8
F501
SMDC110F
OPTIONAL POWER INPUT
P503
POWER SUPPLY INPUT
6V, 2V MAXIMUM
GND
1
GND
1
GND
1
GND
Rev. F | Page 42 of 51
C528
0.1µF
C520
0.1µF
C535
1µF
L507
10µH
C533
1µF
L506
10µH
H2
H1
H4
H3
C530
0.1µF
C522
0.1µF
C531
0.1µF
C523
0.1µF
5V_AVDD
3.3V_AVDD
MOUNTING HOLES
CONNECTED TO GROUND
C529
0.1µF
C521
0.1µF
05966-019
Figure 66. Evaluation Board Schematic, Power Supply Inputs
1
AD9287
Data Sheet
AD9287
05966-020
Data Sheet
Figure 67. Evaluation Board Layout, Primary Side
Rev. F | Page 43 of 51
Data Sheet
05966-021
AD9287
Figure 68. Evaluation Board Layout, Ground Plane
Rev. F | Page 44 of 51
AD9287
05966-022
Data Sheet
Figure 69. Evaluation Board Layout, Power Plane
Rev. F | Page 45 of 51
Data Sheet
05966-023
AD9287
Figure 70. Evaluation Board Layout, Secondary Side (Mirrored Image)
Rev. F | Page 46 of 51
Data Sheet
AD9287
Table 17. Evaluation Board Bill of Materials (BOM)1
Reference Designator
AD9287LFCSP_REVA
C101, C102, C107,
C108, C109, C114,
C115, C116, C121,
C122, C123, C128,
C201, C203, C204,
C205, C206, C210,
C211, C212, C213,
C216, C217, C218,
C219, C220, C221,
C222, C223, C224,
C310, C311, C312,
C313, C314, C316,
C319, C320, C321,
C324, C325, C409,
C410, C412, C414,
C416, C417, C419,
C422, C423, C424,
C425, C427, C428,
C429, C503, C505,
C507, C509, C516,
C517, C518, C519,
C520, C521, C522,
C523, C524, C525,
C526, C527, C528,
C529, C530, C531
C104, C111, C118,
C125
Device
PCB
Capacitor
Package
PCB
402
Value
PCB
0.1 μF, ceramic,
X5R, 10 V, 10% tol
Manufacturer
Manufacturer’s
Part Number
Murata
GRM155R71C104KA88D
Capacitor
402
Murata
GRM1555C1H2R2GZ01B
Capacitor
805
Murata
GRM219R60J106KE19D
1
C315, C326, C413,
C426
C202
Capacitor
603
Murata
GRM188C70J225KE20D
6
2
C309, C411
Capacitor
402
Murata
GRM155R71H102KA01D
7
4
Capacitor
402
AVX
0402YC183KAT2A
8
4
Capacitor
402
Murata
GRM1555C1H220JZ01D
9
1
C317, C322, C415,
C420
C318, C323, C418,
C421
C501
Capacitor
1206
Rohm
TCA1C106M8R
10
9
Capacitor
603
Murata
GRM188R61C105KA93D
11
8
Capacitor
805
0.1 μF, ceramic,
X7R, 50 V, 10% tol
Murata
GRM21BR71H104KA01L
12
4
Capacitor
603
GRM188R60J106M
1
Diode
SOT-23
2
CR401, CR501
LED
603
Agilent
Technologies
Panasonic
HSMS2812-TRIG
14
15
1
D502
Diode
DO-214AB
10 μF, ceramic,
X5R, 6.3 V, 20% tol
30 V, 20 mA, dual
Schottky
Green, 4 V, 5 m
candela
3 A, 30 V, SMC
Murata
13
C214, C512, C513,
C514, C515, C532,
C533, C534, C535
C305, C306, C307,
C308, C405, C406,
C407, C408
C502, C504, C506,
C508
CR201
2.2 pF, ceramic,
COG, 0.25 pF tol,
50 V
10 μF, 6.3 V ±10%
ceramic, X5R
2.2 μF, ceramic,
X5R, 6.3 V, 10% tol
1000 pF, ceramic,
X7R, 25 V, 10% tol
0.018 μF, ceramic,
X7R, 16 V, 10% tol
22 pF, ceramic,
NPO, 5% tol, 50 V
10 μF, tantalum,
16 V, 20% tol
1 μF, ceramic, X5R,
6.3 V, 10% tol
16
1
D501
Diode
DO-214AA
2 A, 50 V, SMC
Item
1
2
Qty.
1
75
3
4
4
4
5
Rev. F | Page 47 of 51
Micro
Commercial Co.
Micro
Commercial Co.
LNJ314G8TRA
SK33-TP
S2A-TP
AD9287
Data Sheet
Value
6.0 V, 2.2 A tripcurrent resettable
fuse
10 μH, 5 A, 50 V,
190 Ω @ 100 MHz
10 Ω, test freq
100 MHz, 25% tol,
500 mA
Manufacturer
Tyco/Raychem
Manufacturer’s
Part Number
NANOSMDC110F-2
Murata
DLW5BSN191SQ2L
Murata
BLM18BA100SN1B
100 mil header
jumper, 2-pin
100 mil header
jumper, 3-pin
100 mil header
male, 4 × 3 triple
row straight
100 mil header,
male, 2 × 5 double
row straight
10 μH, bead core
3.2 × 2.5 × 1.6
SMD, 2 A
120 nH, test freq
100 MHz, 5% tol,
150 mA
0 Ω, 1/8 W, 5% tol
Samtec
TSW-102-07-G-S
Samtec
TSW-103-07-G-S
Samtec
TSW-104-08-G-T
Samtec
TSW-105-08-G-D
Murata
BLM31PG500SN1L
Murata
LQG15HNR12J02B
NIC
Components
NRC10ZOTRF
Clock oscillator,
100.00 MHz, 3.3 V
Side-mount SMA
for 0.063" board
thickness
1469169-1, right
angle 2-pair,
25 mm, header
assembly
SC1153, power
supply connector
10 kΩ, 1/16 W,
5% tol
Valpey Fisher
VFAC3H-L-100MHz
Johnson
Components
142-0710-851
Tyco
6469169-1
Switchcraft
RAPC722X
NIC
Components
NRC04J103TRF
402
0 Ω, 1/16 W,
5% tol
NIC
Components
NRC04Z0TRF
Resistor
402
603
NIC
Components
NIC
Components
NRC04F64R9TRF
Resistor
64.9 Ω, 1/16 W,
1% tol
0 Ω, 1/10 W,
5% tol
Item
17
Qty.
1
Reference Designator
F501
Device
Fuse
Package
1210
18
1
FER501
Choke coil
2020
19
12
Ferrite bead
603
20
1
FB101, FB102, FB103,
FB104, FB105, FB106,
FB107, FB108, FB109,
FB110, FB111, FB112
JP301
Connector
2-pin
21
2
J205, J402
Connector
3-pin
22
1
J201 to J204
Connector
12-pin
23
1
J401
Connector
10-pin
24
8
L501, L502, L503, L504,
L505, L506, L507, L508
Ferrite bead
1210
25
4
L309, L310, L409, L410
Inductor
402
26
16
Resistor
805
27
1
L301, L302, L303, L304,
L305, L306, L307, L308,
L401, L402, L403, L404,
L405, L406, L407, L408
OSC201
Oscillator
SMT
28
5
P101, P103, P105,
P107, P201
Connector
SMA
29
1
P202
Connector
Header
30
1
P503
Connector
0.1", PCMT
31
15
Resistor
402
32
14
Resistor
33
4
34
4
R201, R205, R214,
R215, R221, R239,
R312, R315, R318,
R411, R414, R417,
R425, R429, R430
R103, R117, R129,
R142, R216, R217,
R218, R223, R224,
R237, R420, R426,
R427, R428
R102, R115, R128,
R141
R104, R116, R130,
R143
Rev. F | Page 48 of 51
NRC06Z0TRF
Data Sheet
Item
35
Qty.
15
36
8
37
4
38
AD9287
Manufacturer’s
Part Number
NRC04F1001TRF
Device
Resistor
Package
402
Value
1 kΩ, 1/16 W,
1% tol
Manufacturer
NIC
Components
Resistor
402
33 Ω, 1/16 W,
5% tol
NIC
Components
NRC04J330TRF
Resistor
402
Resistor
402
39
1
R222
Resistor
402
40
1
R213
Resistor
402
NIC
Components
NIC
Components
NIC
Components
Susumu
41
1
R229
Resistor
402
2
R230, R319
Potentiometer
3-lead
NIC
Components
BC
Components
NRC04F4991TRF
42
43
1
R228
Resistor
402
1
R320
Resistor
402
45
8
Resistor
402
46
4
Resistor
402
47
4
Resistor
402
48
11
Resistor
201
374 Ω, 1/16 W,
1% tol
274 Ω, 1/16 W,
1% tol
0 Ω, 1/20 W, 5% tol
NIC
Components
NIC
Components
Panasonic
49
1
R307, R308, R309,
R310, R407, R408,
R409, R410
R305, R306, R405,
R406
R316, R317, R415,
R416
R245, R247, R249,
R251, R253, R255,
R257, R259, R261,
R263, R265
R418
NIC
Components
NIC
Components
NIC
Components
NRC04J474TRF
44
499 Ω, 1/16 W,
1% tol
100 kΩ, 1/16 W,
1% tol
4.02 kΩ, 1/16 W,
1% tol
49.9 Ω, 1/16 W,
0.5% tol
4.99 kΩ, 1/16 W,
5% tol
10 kΩ, cermet
trimmer
potentiometer,
18-turn top adjust,
10%, 1/2 W
470 kΩ, 1/16 W,
5% tol
39 kΩ, 1/16 W,
5% tol
187 Ω, 1/16 W,
1% tol
NRC04F4990TRF
3
Reference Designator
R109, R111, R112,
R123, R125, R126,
R135, R138, R139,
R148, R149, R150,
R431, R432, R433
R108, R110, R121,
R122, R134, R136,
R146, R147
R161, R162, R163,
R164
R202, R203, R204
Resistor
402
50
1
R419
Resistor
402
51
1
R501
Resistor
603
52
2
R240, R241
Resistor
402
53
2
R242, R243
Resistor
402
54
1
S401
Switch
SMD
NIC
Components
NIC
Components
NIC
Components
NIC
Components
NIC
Components
Panasonic
55
5
T101, T102, T103, T104,
T201
Transformer
CD542
56
2
U501, U503
IC
SOT-223
4.75 kΩ, 1/16 W,
1% tol
261 Ω, 1/16 W,
1% tol
261 Ω, 1/16 W,
1% tol
243 Ω, 1/16 W,
1% tol
100 Ω, 1/16 W,
1% tol
Light touch,
100GE, 5 mm
ADT1-1WT, 1:1
impedance ratio
transformer
ADP3339AKC-1.8,
1.5 A, 1.8 V LDO
regulator
Rev. F | Page 49 of 51
NRC04F1003TRF
NRC04F4121TRF
RR0510R-49R9-D
CT94EW103
NRC04J393TRF
NRC04F1870TRF
NRC04F3740TRF
NRC04F2740TRF
ERJ-1GE0R00C
NRC04J472TRF
NRC04F2610TRF
NRC06F2610TRF
NRC04F2430TRF
NRC04F1000TRF
EVQ-PLDA15
Mini-Circuits
ADT1-1WT+
Analog Devices
ADP3339AKCZ-1.8
AD9287
Data Sheet
Item
57
Qty.
2
Reference Designator
U301, U401
Device
IC
Package
LFCSP,
CP-32
58
59
60
1
1
1
U504
U502
U201
IC
IC
IC
SOT-223
SOT-223
LFCSP,
CP-48-1
61
1
U203
IC
SOT-23
62
1
U202
IC
63
1
U403
IC
64
1
U404
IC
65
1
U402
IC
LFCSP
CP-32-2
SC70,
MAA06A
SC70,
MAA06A
8-SOIC
1
Value
AD8332ACP,
ultralow noise
precision dual
VGA
ADP3339AKC-5
ADP3339AKC-3.3
AD9287BCPZ-100,
quad, 8-bit, 100
MSPS serial LVDS
1.8 V ADC
ADR510ARTZ, 1.0 V,
precision low
noise shunt
voltage reference
AD9515BCPZ
Manufacturer
Analog Devices
Manufacturer’s
Part Number
AD8332ACPZ
Analog Devices
Analog Devices
Analog Devices
ADP3339AKCZ-5
ADP3339AKCZ-3.3
AD9287BCPZ-100
Analog Devices
ADR510ARTZ
Analog Devices
AD9515BCPZ
NC7WZ07
Fairchild
NC7WZ07P6X_NL
NC7WZ16
Fairchild
NC7WZ16P6X_NL
Flash prog
mem 1k × 14,
RAM size 64 × 8,
20 MHz speed,
PIC12F controller
series
Microchip
PIC12F629-I/SN
This BOM is RoHS compliant.
Rev. F | Page 50 of 51
Data Sheet
AD9287
OUTLINE DIMENSIONS
0.30
0.23
0.18
0.60 MAX
0.60 MAX
37
36
PIN 1
INDICATOR
6.85
6.75 SQ
6.65
48
1
0.50
REF
*5.55
5.50 SQ
5.45
EXPOSED
PAD
(BOTTOM VIEW)
25
24
TOP VIEW
1.00
0.85
0.80
12° MAX
0.80 MAX
0.65 TYP
0.50
0.40
0.30
13
12
0.22 MIN
5.50 REF
0.05 MAX
0.02 NOM
COPLANARITY
0.08
0.20 REF
SEATING
PLANE
PIN 1
INDICATOR
FOR PROPER CONNECTION OF
THE EXPOSED PAD, REFER TO
THE PIN CONFIGURATION AND
FUNCTION DESCRIPTIONS
SECTION OF THIS DATA SHEET.
*COMPLIANT TO JEDEC STANDARDS MO-220-VKKD-2
WITH EXCEPTION TO EXPOSED PAD DIMENSION.
02-23-2010-C
7.10
7.00 SQ
6.90
Figure 71. 48-Lead Lead Frame Chip Scale Package [LFCSP_VQ]
7 mm × 7 mm Body, Very Thin Quad
(CP-48-8)
Dimensions shown in millimeters
ORDERING GUIDE
Model1
AD9287ABCPZ-100
AD9287ABCPZRL7-100
AD9287-100EBZ
1
2
Notes
Temperature
Range
−40°C to +85°C
−40°C to +85°C
2
Package Description
48-Lead Lead Frame Chip Scale Package [LFCSP_VQ]
48-Lead Lead Frame Chip Scale Package [LFCSP_VQ] 7” Tape and Reel
Evaluation Board
Z = RoHS Compliant Part.
Interposer board (HSC-ADC-FIFO5-INTZ) is required to connect to HSC-ADC-EVALCZ data capture board.
©2006–2015 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D05966-0-1/15(F)
Rev. F | Page 51 of 51
Package
Option
CP-48-8
CP-48-8