Low Power, High Speed
Rail-to-Rail Input/Output Amplifier
AD8029/AD8030/AD8040
Data Sheet
CONNECTION DIAGRAMS
Automotive safety and vision systems
Battery-powered instrumentation
Filters
A-to-D drivers
Buffering
DISABLE
7
+VS
+IN 3
6
VOUT
–VS 4
5
NC
NC = NO CONNECT
VOUT 1
–VS 2
+
+IN 3
Figure 1. SOIC-8 (R)
–
6
+VS
5
DISABLE
4
–IN
03679-A-002
8
Figure 2. SC70-6 (KS)
VOUT 1 1
14
VOUT 4
–IN 1 2
13
–IN 4
+IN 1 3
12
+IN 4
+VS 4
11
–VS
+VOUT 2
+IN 2 5
10
+IN 3
–IN 2
–IN 2 6
9
–IN 3
VOUT 2 7
8
VOUT 3
VOUT 1 1
8
+VS
–IN 1 2
7
+IN 1 3
6
–VS 4
5
+IN 2
Figure 3. SOIC-8 (R) and
SOT23-8 (RJ)
03679-A-001
APPLICATIONS
NC 1
–IN 2
03679-A-003
Qualified for automotive applications
Low power: 1.3 mA supply current/amplifier
High speed
125 MHz, –3 dB bandwidth (G = +1)
60 V/µs slew rate
80 ns settling time to 0.1%
Rail-to-rail input and output
No phase reversal, inputs 200 mV beyond rails
Wide supply range: 2.7 V to 12 V
Offset voltage: 6 mV maximum
Low input bias current
+0.7 µA to –1.5 µA
Small packaging
SOIC-8, SC70-6, SOT23-8, SOIC-14, TSSOP-14
03679-A-004
FEATURES
Figure 4. SOIC-14 (R) and
TSSOP-14 (RU)
GENERAL DESCRIPTION
The AD8029 (single), AD8030 (dual), and AD8040 (quad) are
rail-to-rail input and output high speed amplifiers with a quiescent
current of only 1.3 mA per amplifier. Despite their low power
consumption, the amplifiers provide excellent performance with
125 MHz small signal bandwidth and 60 V/µs slew rate. Analog
Devices, Inc., proprietary XFCB process enables high speed and
high performance on low power.
systems where component density requires lower power
dissipation. The AD8040W is an automotive grade version,
qualified for automotive applications.
The AD8029/AD8030 are the only low power, rail-to-rail input
and output high speed amplifiers available in SOT23 and SC70
micro packages. The amplifiers are rated over the extended
industrial temperature range, –40°C to +125°C.
This family of amplifiers exhibits true single-supply operation
with rail-to-rail input and output performance for supply voltages
ranging from 2.7 V to 12 V. The input voltage range extends
200 mV beyond each rail without phase reversal. The dynamic
range of the output extends to within 40 mV of each rail.
The versatility of the AD8029/AD8030/AD8040 allows the user
to operate the amplifiers on a wide range of supplies while consuming less than 6.5 mW of power. These features extend the
operation time in applications ranging from battery-powered
systems with large bandwidth requirements to high speed
Rev. B
INPUT
4.5
4.0
OUTPUT
3.5
VOLTAGE (V)
The AD8029/AD8030/AD8040 provide excellent signal quality
with minimal power dissipation. At G = +1, SFDR is –72 dBc at
1 MHz and settling time to 0.1% is only 80 ns. Low distortion
and fast settling performance make these amplifiers suitable
drivers for single-supply analog-to-digital converters.
5.0
3.0
2.5
2.0
1.5
1.0
G = +1
0.5 VS = +5V
RL = 1kΩ TIED TO MIDSUPPLY
0
TIME (µs)
1µs/DIV
03679-A-010
Figure 5. Rail-to-Rail Response
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Technical Support
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AD8029/AD8030/AD8040
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1 Theory of Operation ...................................................................... 16 Applications ....................................................................................... 1 Input Stage ................................................................................... 16 Connection Diagrams ...................................................................... 1 Output Stage................................................................................ 16 General Description ......................................................................... 1 Applications..................................................................................... 17 Specifications..................................................................................... 3 Wideband Operation ................................................................. 17 Specifications with ±5 V Supply ................................................. 3 Output Loading Sensitivity ....................................................... 17 Specifications with +5 V Supply ................................................. 4 Disable Pin .................................................................................. 18 Specifications with +3 V Supply ................................................. 5 Circuit Considerations .............................................................. 19 Absolute Maximum Ratings............................................................ 7 Design Tools and Technical Support ....................................... 19 Maximum Power Dissipation ..................................................... 7 Outline Dimensions ....................................................................... 20 ESD Caution .................................................................................. 7 Ordering Guide .......................................................................... 21 Typical Performance Characteristics ............................................. 8 REVISION HISTORY
10/12—Rev. A to Rev. B
Added Automotive Model, AD8040W ............................ Universal
Changes to Features Section............................................................ 1
Changes to General Description Section ...................................... 1
Changes to Specifications Section, Table 1, Added Automotive
Specifications..................................................................................... 3
Moved ESD Caution to Absolute Maximum Ratings Section .... 7
Changes to Figure 17 ........................................................................ 9
Updated Outline Dimensions ....................................................... 20
Changes to Ordering Guide .......................................................... 21
11/03—Rev. 0 to Rev. A
Added AD8040 part ....................................................... Universal
Change to Figure 5 ....................................................................... 1
Changes to Specifications ............................................................ 3
Changes to Figures 10–12 ............................................................ 7
Change to Figure 14 ..................................................................... 8
Changes to Figures 20 and 21 ..................................................... 9
Inserted new Figure 36............................................................... 11
Change to Figure 40 ................................................................... 12
Inserted new Figure 41............................................................... 12
Added Output Loading Sensitivity section ............................. 16
Changes to Table 5 ...................................................................... 17
Changes to Power Supply Bypassing section .......................... 18
Changes to Ordering Guide ...................................................... 20
Rev. B | Page 2 of 24
Data Sheet
AD8029/AD8030/AD8040
SPECIFICATIONS
SPECIFICATIONS WITH ±5 V SUPPLY
Table 1. VS = ±5 V @ TA = 25°C, G = +1, RL = 1 kΩ to ground, unless otherwise noted. All specifications are per amplifier.
Parameter
DYNAMIC PERFORMANCE
–3 dB Bandwidth
Conditions
Min
Typ
G = +1, VO = 0.1 V p-p
AD8040W only: TMIN to TMAX
G = +1, VO = 2 V p-p
AD8040W only: TMIN to TMAX
G = +2, VO = 0.1 V p-p
G = +1, VO = 2 V Step
G = –1, VO = 2 V Step
G = +2, VO = 2 V Step
80
80
14
9
125
Max
Unit
6
62
63
80
MHz
MHz
MHz
MHz
MHz
V/μs
V/μs
ns
Input Voltage Noise
fC = 1 MHz, VO = 2 V p-p
fC = 5 MHz, VO = 2 V p-p
f = 100 kHz
–74
–56
16.5
dBc
dBc
nV/√Hz
Input Current Noise
f = 100 kHz
1.1
Crosstalk (AD8030/AD8040)
f = 5 MHz, VIN = 2 V p-p
–79
pA/√Hz
dB
PNP Active, VCM = 0 V
1.6
Bandwidth for 0.1 dB Flatness
Slew Rate
Settling Time to 0.1%
NOISE/DISTORTION PERFORMANCE
Spurious Free Dynamic Range (SFDR)
DC PERFORMANCE
Input Offset Voltage
19
AD8040W only: TMIN to TMAX
NPN Active, VCM = 4.5 V
2
AD8040W only: TMIN to TMAX
Input Offset Voltage Drift
Input Bias Current1
TMIN to TMAX
NPN Active, VCM = 4.5 V
TMIN to TMAX
AD8040W only: TMIN to TMAX
PNP Active, VCM = 0 V
TMIN to TMAX
AD8040W only: TMIN to TMAX
30
0.7
1
–1.7
2
Input Offset Current
Open-Loop Gain
INPUT CHARACTERISTICS
Input Resistance
Input Capacitance
Input Common-Mode Voltage Range
Common-Mode Rejection Ratio
±0.1
AD8040W only: TMIN to TMAX
Vo = ±4.0 V
AD8040W only: TMIN to TMAX
65
62
5
mV
9.5
mV
6
mV
9.5
mV
1.3
1.3
–2.8
–2.8
±0.9
±0.9
74
μV/°C
μA
μA
μA
μA
μA
μA
μA
μA
dB
dB
6
2
–5.2 to +5.2
90
MΩ
pF
V
dB
dB
DISABLE Low Voltage
–VS + 0.8
V
DISABLE Low Current
–6.5
μA
DISABLE High Voltage
–VS + 1.2
V
0.2
μA
150
ns
85
ns
VCM = –4.5 V to +3 V, RL = 10 kΩ
AD8040W only: TMIN to TMAX
80
80
DISABLE PIN (AD8029)
DISABLE High Current
Turn-Off Time
Turn-On Time
OUTPUT CHARACTERISTICS
Output Overdrive Recovery Time
(Rising/Falling Edge)
Output Voltage Swing
50% of DISABLE to <10% of Final VO,
VIN = –1 V, G = –1
50% of DISABLE to <10% of Final VO,
VIN = –1 V, G = –1
VIN = +6 V to –6 V, G = –1
RL = 1 kΩ
AD8040W only: TMIN to TMAX
RL = 10 kΩ
AD8040W only: TMIN to TMAX
Rev. B | Page 3 of 24
55/45
–VS + 0.22
–VS + 0.22
–VS + 0.05
–VS + 0.05
+VS – 0.22
+VS – 0.22
+VS – 0.05
+VS – 0.05
ns
V
V
V
V
AD8029/AD8030/AD8040
Parameter
Short-Circuit Current
Off Isolation (AD8029)
Capacitive Load Drive
POWER SUPPLY
Operating Range
Quiescent Current/Amplifier
Data Sheet
Conditions
Min
Sinking and Sourcing
VIN = 0.1 V p-p, f = 1 MHz, DISABLE = Low
30% Overshoot
Typ
20
pF
1.4
AD8040W only: TMIN to TMAX
1
DISABLE = Low, AD8029 only
Power Supply Rejection Ratio
Vs ± 1 V
AD8040W only: TMIN to TMAX
150
73
72
Unit
mA
dB
2.7
Quiescent Current (Disabled)
Max
170/160
–55
12
1.5
V
mA
1.85
mA
200
µA
80
dB
dB
Plus, +, (or no sign) indicates current into pin; minus (–) indicates current out of pin.
SPECIFICATIONS WITH +5 V SUPPLY
Table 2. VS = 5 V @ TA = 25°C, G = +1, RL = 1 kΩ to midsupply, unless otherwise noted. All specifications are per amplifier.
Parameter
DYNAMIC PERFORMANCE
–3 dB Bandwidth
Conditions
Min
Typ
G = +1, VO = 0.1 V p-p
80
80
13
8
120
G = +2, VO = 0.1 V p-p
G = +1, VO = 2 V Step
G = –1, VO = 2 V Step
G = +2, VO = 2 V Step
6
55
60
82
fC = 1 MHz, VO = 2 V p-p
fC = 5 MHz, VO = 2 V p-p
f = 100 kHz
f = 100 kHz
f = 5 MHz, VIN = 2 V p-p
–73
–55
16.5
1.1
–79
dBc
dBc
nV/√Hz
pA/√Hz
dB
PNP Active, VCM = 2.5 V
1.4
G = +1, VO = 2 V p-p
AD8040W only: TMIN to TMAX
Settling Time to 0.1%
NOISE/DISTORTION PERFORMANCE
Spurious Free Dynamic Range (SFDR)
Input Voltage Noise
Input Current Noise
Crosstalk (AD8030/AD8040)
DC PERFORMANCE
Input Offset Voltage
18
AD8040W only: TMIN to TMAX
NPN Active, VCM = 4.5 V
1.8
AD8040W only: TMIN to TMAX
Input Offset Voltage Drift
Input Bias Current1
TMIN to TMAX
NPN Active, VCM = 4.5 V
TMIN to TMAX
PNP Active, VCM = 2.5 V
TMIN to TMAX
25
0.8
1
–1.8
2
±0.1
Input Offset Current
AD8040W only: TMIN to TMAX
Open-Loop Gain
Vo = 1 V to 4 V
AD8040W only: TMIN to TMAX
INPUT CHARACTERISTICS
Input Resistance
Input Capacitance
Input Common-Mode Voltage Range
Common-Mode Rejection Ratio
Unit
MHz
MHz
MHz
MHz
MHz
V/µs
V/µs
ns
AD8040W only: TMIN to TMAX
Bandwidth for 0.1 dB Flatness
Slew Rate
Max
VCM = 0.25 V to 2 V, RL = 10 kΩ
AD8040W only: TMIN to TMAX
DISABLE PIN (AD8029)
DISABLE Low Voltage
DISABLE Low Current
DISABLE High Voltage
Rev. B | Page 4 of 24
65
62
80
80
74
5
8.5
6
8.5
1.2
–2.8
±0.9
±0.9
mV
mV
mV
mV
µV/°C
µA
µA
µA
µA
µA
µA
dB
dB
6
2
–0.2 to +5.2
90
MΩ
pF
V
dB
dB
–VS + 0.8
–6.5
–VS + 1.2
V
µA
V
Data Sheet
Parameter
DISABLE High Current
Turn-Off Time
Turn-On Time
OUTPUT CHARACTERISTICS
Overdrive Recovery Time
(Rising/Falling Edge)
Output Voltage Swing
AD8029/AD8030/AD8040
Conditions
Min
50% of DISABLE to <10% of Final VO,
VIN = –1 V, G = –1
50% of DISABLE to <10% of Final VO,
VIN = –1 V, G = –1
Max
VIN = –1 V to +6 V, G = –1
RL = 1 kΩ
ns
45/50
–VS + 0.17
–VS + 0.17
–VS + 0.04
–VS + 0.04
RL = 10 kΩ
AD8040W only: TMIN to TMAX
Sinking and Sourcing
Vin = 0.1 V p-p, f = 1 MHz, DISABLE = Low
30% Overshoot
+VS – 0.17
+VS – 0.17
+VS – 0.04
+VS – 0.04
95/60
–55
15
2.7
12
1.5
1.75
200
1.3
AD8040W only: TMIN to TMAX
Quiescent Current (Disabled)
Power Supply Rejection Ratio
DISABLE = Low, AD8029 only
VS ± 1 V
140
80
73
72
AD8040W only: TMIN to TMAX
1
Unit
µA
ns
90
AD8040W only: TMIN to TMAX
Short-Circuit Current
Off Isolation (AD8029)
Capacitive Load Drive
POWER SUPPLY
Operating Range
Quiescent Current/Amplifier
Typ
0.2
155
ns
V
V
V
V
mA
dB
pF
V
mA
mA
µA
dB
dB
Plus, +, (or no sign) indicates current into pin; minus (–) indicates current out of pin.
SPECIFICATIONS WITH +3 V SUPPLY
Table 3. VS = +3 V @ TA = 25°C, G = +1, RL = 1 kΩ to midsupply, unless otherwise noted. All specifications are per amplifier.
Parameter
DYNAMIC PERFORMANCE
–3 dB Bandwidth
Conditions
Min
Typ
G = +1, VO = 0.1 V p-p
80
80
13
8
112
G = +2, VO = 0.1 V p-p
G = +1, VO = 2 V Step
G = –1, VO = 2 V Step
G = +2, VO = 2 V Step
6
55
57
110
fC = 1 MHz, VO = 2 V p-p
fC = 5 MHz, VO = 2 V p-p
f = 100 kHz
f = 100 kHz
f = 5 MHz, VIN = 2 V p-p
–72
–60
16.5
1.1
–80
dBc
dBc
nV/√Hz
pA/√Hz
dB
PNP Active, VCM = 1.5 V
1.1
G = +1, VO = 2 V p-p
AD8040W only: TMIN to TMAX
Settling Time to 0.1%
NOISE/DISTORTION PERFORMANCE
Spurious Free Dynamic Range (SFDR)
Input Voltage Noise
Input Current Noise
Crosstalk (AD8030/AD8040)
DC PERFORMANCE
Input Offset Voltage
18
AD8040W only: TMIN to TMAX
NPN Active, VCM = 2.5 V
1.6
AD8040W only: TMIN to TMAX
Input Offset Voltage Drift
Input Bias Current1
Input Bias Current1
Unit
MHz
MHz
MHz
MHz
MHz
V/µs
V/µs
ns
AD8040W only: TMIN to TMAX
Bandwidth for 0.1 dB Flatness
Slew Rate
Max
TMIN to TMAX
NPN Active, VCM = 2.5 V
TMIN to TMAX
PNP Active, VCM = 1.5 V
TMIN to TMAX
Input Offset Current
AD8040W only: TMIN to TMAX
Rev. B | Page 5 of 24
24
0.7
1
–1.5
1.6
±0.1
5
8
6
8
1.2
–2.5
±0.9
±0.9
mV
mV
mV
mV
µV/°C
µA
µA
µA
µA
µA
µA
AD8029/AD8030/AD8040
Parameter
Open-Loop Gain
Data Sheet
Conditions
Vo = 0.5 V to 2.5 V
AD8040W only: TMIN to TMAX
INPUT CHARACTERISTICS
Input Resistance
Input Capacitance
Input Common-Mode Voltage Range
Common-Mode Rejection Ratio
VCM = 0.25 V to 1.25 V, RL = 10 kΩ
AD8040W only: TMIN to TMAX
DISABLE PIN (AD8029)
DISABLE Low Voltage
DISABLE Low Current
DISABLE High Voltage
DISABLE High Current
Turn-Off Time
Turn-On Time
OUTPUT CHARACTERISTICS
Output Overdrive Recovery Time
(Rising/Falling Edge)
Output Voltage Swing
78
78
50% of DISABLE to <10% of Final VO,
VIN = –1 V, G = –1
50% of DISABLE to <10% of Final VO,
VIN = –1 V, G = –1
VIN = –1 V to +4 V, G = –1
RL = 1 kΩ
AD8040W only: TMIN to TMAX
RL = 10 kΩ
AD8040W only: TMIN to TMAX
Short-Circuit Current
Off Isolation (AD8029)
Capacitive Load Drive
POWER SUPPLY
Operating Range
Quiescent Current/Amplifier
Min
64
62
Typ
73
MΩ
pF
V
dB
dB
–VS + 0.8
–6.5
–VS + 1.2
0.2
165
V
µA
V
µA
ns
95
ns
75/100
–VS + 0.09
–VS + 0.09
–VS + 0.04
–VS + 0.04
Sinking and Sourcing
VIN = 0.1 V p-p, f = 1 MHz, DISABLE = Low
30% Overshoot
+VS – 0.09
+VS – 0.09
+VS – 0.04
+VS – 0.04
80/40
–55
10
2.7
1.3
DISABLE = Low, AD8029 only
VS ± 1 V
AD8040W only: TMIN to TMAX
1
Plus, +, (or no sign) indicates current into pin; minus (–) indicates current out of pin.
Rev. B | Page 6 of 24
70
68
Unit
dB
dB
6
2
–0.2 to +3.2
88
AD8040W only: TMIN to TMAX
Quiescent Current (Disabled)
Power Supply Rejection Ratio
Max
145
76
12
1.4
1.75
200
ns
V
V
V
V
mA
dB
pF
V
mA
mA
µA
dB
dB
Data Sheet
AD8029/AD8030/AD8040
ABSOLUTE MAXIMUM RATINGS
RMS output voltages should be considered. If RL is referenced to
VS–, as in single-supply operation, then the total drive power is
VS × IOUT.
Table 4. AD8029/AD8030/AD8040 Stress Ratings
Rating
12.6 V
See Figure 6
±VS ± 0.5 V
±1.8 V
–65°C to +125°C
–40°C to +125°C
300°C
If the rms signal levels are indeterminate, consider the worst
case, when VOUT = VS/4 for RL to midsupply:
PD = (VS × I S ) +
RL
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
MAXIMUM POWER DISSIPATION
The maximum safe power dissipation in the AD8029/AD8030/
AD8040 package is limited by the associated rise in junction
temperature (TJ) on the die. The plastic encapsulating the die
locally reaches the junction temperature. At approximately
150°C, which is the glass transition temperature, the plastic
changes its properties. Even temporarily exceeding this
temperature limit may change the stresses that the package
exerts on the die, permanently shifting the parametric
performance of the AD8029/AD8030/AD8040. Exceeding a
junction temperature of 175°C for an extended period can
result in changes in silicon devices, potentially causing failure.
Airflow increases heat dissipation, effectively reducing θJA. Also,
more metal directly in contact with the package leads from
metal traces, through holes, ground, and power planes reduce
the θJA. Care must be taken to minimize parasitic capacitances
at the input leads of high speed op amps, as discussed in the
PCB Layout section.
Figure 6 shows the maximum safe power dissipation in the
package versus the ambient temperature for the SOIC-8
(125°C/W), SOT23-8 (160°C/W), SOIC-14 (90°C/W),
TSSOP-14 (120°C/W), and SC70-6 (208°C/W) packages on a
JEDEC standard 4-layer board. θJA values are approximations.
2.5
The still-air thermal properties of the package and PCB (θJA),
ambient temperature (TA), and the total power dissipated in the
package (PD) determine the junction temperature of the die.
The junction temperature can be calculated as
2.0
SOIC-14
1.5
TSSOP-14
SOIC-8
1.0
0.5
SOT-23-8
SC70-6
0
–40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
TJ = TA + (PD × θJA)
03679-A-018
150°C
Figure 6. Maximum Power Dissipation
The power dissipated in the package (PD) is the sum of the
quiescent power dissipation and the power dissipated in the
package due to the load drive for all outputs. The quiescent
power is the voltage between the supply pins (VS) times the
quiescent current (IS). Assuming the load (RL) is referenced to
midsupply, the total drive power is VS/2 × IOUT, some of which is
dissipated in the package and some in the load (VOUT × IOUT).
The difference between the total drive power and the load
power is the drive power dissipated in the package.
Output Short Circuit
Shorting the output to ground or drawing excessive current
from the AD8029/AD8030/AD8040 could cause catastrophic
failure.
ESD CAUTION
PD = Quiescent Power + (Total Drive Power – Load Power)
V V
PD = (VS × I S ) +  S × OUT
RL
 2
(VS /4 )2
In single-supply operation with RL referenced to VS–, worst case
is VOUT = VS/2.
MAXIMUM POWER DISSIPATION (W)
Parameter
Supply Voltage
Power Dissipation
Common-Mode Input Voltage
Differential Input Voltage
Storage Temperature
Operating Temperature Range
Lead Temperature Range
(Soldering 10 sec)
Junction Temperature
 VOUT 2
–

RL

Rev. B | Page 7 of 24
AD8029/AD8030/AD8040
Data Sheet
TYPICAL PERFORMANCE CHARACTERISTICS
Default Conditions: VS = 5 V (TA = 25°C, RL = 1 kΩ tied to midsupply, unless otherwise noted.)
0.2
1
NORMALIZED CLOSED-LOOP GAIN (dB)
–1
–2
G = +10
RF = 9kΩ, RG = 1kΩ
–3
–4
–5
G = +1
RF = 0Ω
G = +2
RF = RG = 1kΩ
–6
–7
–8
–9
–10
–11
–12
–13
–14
0.1
VO = 0.1V p-p
1
0
–0.1
G = +1
–0.2
–0.3
–0.4
G = +2
–0.5
–0.6
–0.7
–0.8
10
FREQUENCY (MHz)
100
1
1000
NORMALIZED CLOSED-LOOP GAIN (dB)
CLOSED-LOOP GAIN (dB)
Figure 10. 0.1 dB Flatness Frequency Response
+3V
±5V
–1
100
03679-A-011
1
G = +1
VO = 0.1V p-p
0
10
FREQUENCY (MHz)
03679-0-004
Figure 7. Small Signal Frequency Response for Various Gains
1
RF = 1kΩ
DASHED LINES: VOUT = 2V p-p
0.1 SOLID LINES: VOUT = 0.1V p-p
NORMALIZED CLOSED-LOOP GAIN (dB)
G = –1
RF = RG = 1kΩ
0
–2
–3
–4
+5V
–5
–6
–7
G = +2
VO = 0.1V p-p
RF = 1kΩ
0
–1
–2
–3
±5V
–4
–5
–6
+5V
–7
+3V
–8
–8
1
10
100
FREQUENCY (MHz)
1000
1
Figure 8. Small Signal Frequency Response for Various Supplies
1
1
NORMALIZED CLOSED-LOOP GAIN (dB)
±5V
CLOSED-LOOP GAIN (dB)
–1
–2
+3V
–3
–4
–5
–6
+5V
–7
100
03679-A-012
Figure 11. Small Signal Frequency Response for Various Supplies
G = +1
VO = 2V p-p
0
10
FREQUENCY (MHz)
03679-0-005
–8
G = +2
VO = 2V p-p
0
RF = 1kΩ
–1
VS = ±5
–2
VS = +5
–3
–4
VS = +3
–5
–6
–7
–8
1
10
FREQUENCY (MHz)
100
1
03679-0-006
Figure 9. Large Signal Frequency Response for Various Supplies
10
FREQUENCY (MHz)
100
03679-A-013
Figure 12. Large Signal Frequency Response for Various Supplies
Rev. B | Page 8 of 24
Data Sheet
AD8029/AD8030/AD8040
2
6
CLOSED-LOOP GAIN (dB)
3
2
G = +1
1 VO = 0.1V p-p
20pF
10pF
5pF
1
0
–1
0pF
–2
VICM = VS+ – 0.2V
VICM = 0V
0
CLOSED-LOOP GAIN (dB)
G = +1
5 V = 0.1V p-p
O
4
–3
–4
–5
–1
VICM = VS– + 0.2V
–2
–3
–4
–5
–6
–6
–7
–7
–8
–8
1
10
100
FREQUENCY (MHz)
1000
1
Figure 13. Small Signal Frequency Response for Various CLOAD
1
NORMALIZED CLOSED-LOOP GAIN (dB)
2
+125°C
+85°C
+25°C
CLOSED-LOOP GAIN (dB)
–2
–3
–4
–5
2V p-p
1V p-p
–6
0.1V p-p
1
10
FREQUENCY (MHz)
0
–40°C
–1
–2
–3
–4
–5
–7
–8
–6
100
1
10
100
FREQUENCY (MHz)
03679-A-014
80
225
1
70
G = +1
VO = 2V p-p
0
50
40
135
30
20
90
10
0
45
+125°C
–1
CLOSED-LOOP GAIN (dB)
180
OPEN-LOOP PHASE (Degrees)
60
1000
03679-0-014
Figure 17. Small Signal Frequency Response vs. Temperature
Figure 14. Frequency Response for Various Output Amplitudes
OPEN-LOOP GAIN (dB)
G = +1
VO = 0.1V p-p
1
–1
+25°C
–2
+85°C
–3
–4
–40°C
–5
–6
–7
–10
–20
10
1000
03679-0-013
Figure 16. Small Signal Frequency Response for Various
Input Common-Mode Voltages
G = +2
RF = 1kΩ
0
10
100
FREQUENCY (MHz)
03679-0-010
100
1k
10k
100k
1M
FREQUENCY (Hz)
10M
100M
0
1G
–8
1
03679-0-054
Figure 15. Open-Loop Gain and Phase vs. Frequency
10
FREQUENCY (MHz)
100
03679-0-015
Figure 18. Large Signal Frequency Response vs. Temperature
Rev. B | Page 9 of 24
AD8029/AD8030/AD8040
Data Sheet
–40
G = +1
VOUT = 2V p-p
–45 RL = 1kΩ
SECOND HARMONIC: SOLID LINE
THIRD HARMONIC: DASHED LINE
–55
–50
HARMONIC DISTORTION (dBc)
HARMONIC DISTORTION (dBc)
–35
–65
VS = +3V
–75
–85
VS = +5V
VS = ±5V
G = +1
VOUT = 2V p-p
SECOND HARMONIC: SOLID LINE
THIRD HARMONIC: DASHED LINE
–60
–70
RL = 1kΩ
–80
–90
RL = 5kΩ
–100
–95
RL = 2kΩ
–105
0.01
0.1
1
FREQUENCY (MHz)
–110
0.01
10
–40
–40
VS = +5V
VS = +3V
–55
–60
–65
–70
–75
G = +1
VOUT = 2V p-p
FREQ = 1MHz
–50
VS = +10V
HARMONIC DISTORTION (dBc)
HARMONIC DISTORTION (dBc)
G = +2
FREQ = 1MHz
–45 RF = 1kΩ
–80
0.5
2.5
3.5
4.5
5.5
6.5
7.5
OUTPUT AMPLITUDE (V p-p)
8.5
VS = +5V
VS = +3V
–60
–70
–80
–90
SECOND HARMONIC: SOLID LINE
THIRD HARMONIC: DASHED LINE
SECOND HARMONIC: SOLID LINE
THIRD HARMONIC: DASHED LINE
1.5
10
03679-0-075
Figure 22. Harmonic Distortion vs. Frequency and Load
Figure 19. Harmonic Distortion vs. Frequency and Supply Voltage
–50
0.1
1
FREQUENCY (MHz)
03679-0-016
–100
1.0
9.5
1.5
03679-A-015
2.0
2.5
3.0
3.5
INPUT COMMON-MODE VOLTAGE (V)
4.0
03679-0-020
Figure 23. Harmonic Distortion vs. Input Common Mode Voltage
Figure 20. Harmonic Distortion vs. Output Amplitude
–30
1000
100
100
10
G = +2
–60
G = –1
–70
–80
–90
VOLTAGE NOISE
1
10
CURRENT NOISE
G = +1
–100
–110
0.01
SECOND HARMONIC: SOLID LINE
THIRD HARMONIC: DASHED LINE
0.1
1
FREQUENCY (MHz)
1
10
10
03679-A-016
100
1k
10k
100k
FREQUENCY (Hz)
0.1
10M
1M
03679-0-069
Figure 24. Voltage and Current Noise vs. Frequency
Figure 21. Harmonic Distortion vs. Frequency and Gain
Rev. B | Page 10 of 24
CURRENT NOISE (pA/ Hz)
–50
VOLTAGE NOISE (nV/ Hz)
HARMONIC DISTORTION (dBc)
VS = +5V
VOUT = 2.0V p-p
–40 R = 1kΩ
L
RF = 1kΩ
Data Sheet
AD8029/AD8030/AD8040
100
100
75
G = +1
VS = ±2.5V
75
25
0
–25
–50
25
0
–25
–50
–75
–75
25mV/DIV
25mV/DIV
20ns/DIV
TIME (ns)
TIME (ns)
03679-0-022
2.5
G = +1
2.0 VS = ±2.5V
5.0
4V p-p
INPUT
4.5
4.0
1.0
3.5
2V p-p
VOLTAGE (V)
0.5
0
–0.5
–1.0
3.0
2.5
2.0
1.5
–1.5
1.0
G = +1
0.5 VS = +5V
RL = 1kΩ TIED TO MIDSUPPLY
0
TIME (Seconds)
–2.0
0.5V/DIV
25ns/DIV
TIME (ns)
03679-A-023
Figure 26. Large Signal Transient Response
OUTPUT
1µs/DIV
03679-0-059
Figure 29. Rail-to-Rail Response, G = +1
4
4
INPUT
3
G = –1 (RF = 1kΩ)
RL = 1kΩ
VS = ±2.5V
INPUT
3
2
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
1.5
OUTPUT VOLTAGE (V)
03679-0-025
Figure 28. Small Signal Transient Response with Capacitive Load
Figure 25. Small Signal Transient Response
1
20ns/DIV
–100
–100
–2.5
CL = 20pF
CL = 10pF
CL = 5pF
50
OUTPUT VOLTAGE (mV)
OUTPUT VOLTAGE (mV)
50
G = +1
VS = ±2.5V
OUTPUT
0
–1
G = +1
RL = 1kΩ
VS = ±2.5V
2
OUTPUT
1
0
–1
–2
–2
–3
–3
1V/DIV
200ns/DIV
1V/DIV
–4
200ns/DIV
–4
TIME (ns)
TIME (ns)
03679-0-024
Figure 30. Input Overdrive Recovery
Figure 27. Output Overdrive Recovery
Rev. B | Page 11 of 24
03679-0-027
AD8029/AD8030/AD8040
Data Sheet
VIN (250mV/DIV)
VOUT (500mV/DIV)
G = +2
VS = ±2.5V
G = +2
+1V
+0.1%
+0.1%
VOUT – 2VIN (0.1%/DIV)
VOUT – 2VIN (0.1%/DIV)
–0.1%
–0.1%
VOUT (500mV/DIV)
–1V
500ns/DIV
20ns/DIV
03679-0-062
03679-0-063
Figure 31. Long-Term Settling Time
Figure 34.0.1% Short-Term Settling Time
0
–20
–10
–30
–20
+PSRR
–40
–30
PSRR (dB)
CMRR (dB)
–50
–60
–70
–40
–50
–60
–70
–PSRR
–80
–80
–90
–90
–100
1k
–100
10k
100k
1M
10M
FREQUENCY (Hz)
100M
1G
10k
100M
1G
03679-0-033
–30
VIN
G = +1
RL = 1kΩ
DISABLE = LOW
VIN = 0.1V p-p
–40
DRIVE AMP
50Ω
1kΩ
–50
–60
CROSSTALK (dB)
–40
OUTPUT (dB)
10M
Figure 35. PSRR vs. Frequency
–20
–50
–60
LISTEN AMP
VOUT
–70
1kΩ
–80
CROSSTALK = 20log
–90
( )
VOUT
VIN
AD8030
(AMP 2 DRIVE
AMP 1 LISTEN)
–100
–110
–70
AD8040
(AMP 4 DRIVE
AMP 1 LISTEN)
–120
–80
0.1
1M
FREQUENCY (Hz)
Figure 32. Common-Mode Rejection Ratio vs. Frequency
–30
100k
03679-0-078
1
10
FREQUENCY (MHz)
100
1000
–130
0.01
03679-0-055
Figure 33. AD8029 Off-Isolation vs. Frequency
0.1
1.0
10
FREQUENCY (MHz)
100
Figure 36. AD8030/AD8040 Crosstalk vs. Frequency
Rev. B | Page 12 of 24
1000
03679-A-005
1k
Data Sheet
AD8029/AD8030/AD8040
4
2.5
2.0
VS = +10V
INPUT OFFSET VOLTAGE (mV)
1.0
0.5
0
–0.5
–1.0
–1.5
–2.5
–1
0
1
2
3
4
5
6
7
8
9
INPUT COMMON-MODE VOLTAGE (V)
10
1
0
–1
–2
–4
–1
11
–1.2
0.8
NPN ACTIVE
VS = +5
0.6
VS = +3
0.4
–1.6
PNP ACTIVE
–1.8
–25
–10
5
20
35
50
65
TEMPERATURE (°C)
80
0.2
95
110
2
3
4
5
6
7
8
9
INPUT COMMON-MODE VOLTAGE (V)
10
11
Figure 40. Input Offset Voltage vs. Input Common-Mode Voltage
4
3
INPUT OFFSET VOLTAGE (mV)
1.0
VS = ±5
1
03679-A-017
INPUT BIAS CURRENT (NPN ACTIVE) (µA)
–1.0
–1.4
0
03679-0-074
Figure 37. Input Bias Current vs. Input Common-Mode Voltage
2
VS = ±5V
1
VS = +5V
0
–1
VS = +3V
–2
–3
–4
–40
0
125
–25
–10
5
20
35
50
65
TEMPERATURE (°C)
80
95
110
125
03679-0-073
Figure 41. Input Offset Voltage vs. Temperature
Figure 38. Input Bias Current vs. Temperature
120
1.8
COUNT = 1088
MEAN = 0.44mV
STDEV = 1.05mV
1.7
100
1.6
VS = +5V
1.5
80
VS = ±5V
1.4
FREQUENCY
SUPPLY CURRENT (mA)
INPUT BIAS CURRENT (PNP ACTIVE) (µA)
VS = +10V
–3
–2.0
–2.0
–40
VS = +5V
2
1.3
VS = +3V
1.2
1.1
1.0
60
40
20
0.9
0.8
–40
0
–20
0
20
40
60
TEMPERATURE (°C)
80
100
120
–5
–4
–3
–2
–1
0
1
2
3
INPUT OFFSET VOLTAGE (mV)
03679-0-067
Figure 42. Input Offset Voltage Distribution
Figure 39 Quiescent Supply Current vs. Temperature
Rev. B | Page 13 of 24
4
5
03679-0-064
03679-A-006
INPUT BIAS CURRENT (µA)
VS = +5V
VS = +3V
1.5
RL = 1kΩ TO
MIDSUPPLY
G = +1
VS = +3V
3
AD8029/AD8030/AD8040
Data Sheet
1M
1000
G = +1
DISABLE = LOW
OUTPUT IMPEDANCE (Ω)
OUTPUT IMPEDANCE (Ω)
100k
10k
1k
100
100
10
1
10
1
100k
1M
10M
FREQUENCY (Hz)
100M
0.1
1k
1G
100k
1M
10M
FREQUENCY (Hz)
100M
2.0
0.5
LOAD RESISTANCE TIED
TO MIDSUPPLY
0.4
0.2
VOL – VS
0.1
VS = +3V
0
VS = ±2.5V
1.5
INPUT ERROR VOLTAGE (mV)
0.3
VS = +5V VS = ±5V
–0.1
VOH – VS
–0.2
–0.3
1.0
0.5
RL = 10kΩ
0
RL = 1kΩ
–0.5
–1.0
–1.5
–0.4
–0.5
100
1000
LOAD RESISTANCE (Ω)
–2.0
–2.5
10000
–2.0
–1.5
–1.0 –0.5 –0
0.5
1.0
OUTPUT VOLTAGE (V)
1.5
03679-0-041
Figure 46. Input Error Voltage vs. Output Voltage
Figure 44. Output Saturation Voltage vs. Load Resistance
170
OUTPUT SATURATION VOLTAGE (mV)
1G
03679-0-060
Figure 45. Output Impedance vs. Frequency, Enabled
Figure 43. AD8029 Output Impedance vs. Frequency, Disabled
OUTPUT SATURATION VOLTAGE (V)
10k
03679-0-061
150
VS = ±5V
130
110
90
VS = +5V
70
50
30
–40
RL = 1kΩ TIED TO MIDSUPPLY
SOLID LINE: VS+ – VOH
DASHED LINE: VOL – VS–
VS = +3V
–25
–10
5
20
35
50
65
TEMPERATURE (°C)
80
95
110
125
03679-0-066
Figure 42. Output Saturation Voltage vs. Temperature
Rev. B | Page 14 of 24
2.0
2.5
03679-0-072
Data Sheet
AD8029/AD8030/AD8040
1
1.5
DISABLE (–0.5V TO –2V)
VS = +3V, +5V, +10V
0
DISABLE PIN CURRENT (µA)
OUTPUT AMPLITUDE (V)
1.0
0.5
RL = 100Ω
0
OUTPUT DISABLED
RL = 1kΩ
RL = 10kΩ
–0.5
–1
–2
–3
–4
–5
–1.0
–6
VS = ±2.5V
G = –1 (RF = 1kΩ)
–1.5
0
50
100
150
200
TIME (ns)
250
300
–7
0
350
03679-A-020
1.5
DISABLE (–2V TO –0.5V)
OUTPUT AMPLITUDE (V)
OUTPUT ENABLED
0.5
0
RL = 100Ω
RL = 1kΩ
RL = 10kΩ
–0.5
–1.0
–1.5
VS = ±2.5V
G = –1 (RF = 1kΩ)
0
50
100
150
200
TIME (ns)
250
3
03679-A-022
Figure 49. AD8029 DISABLE Pin Current vs. DISABLE Pin Voltage
Figure 47. AD8029 DISABLE Turn-Off Timing
1.0
0.8 1 1.2
2
DISABLE PIN VOLTAGE (V)
300
350
03679-A-021
Figure 48. AD8029 DISABLE Turn-On Timing
Rev. B | Page 15 of 24
AD8029/AD8030/AD8040
Data Sheet
THEORY OF OPERATION
+VS
RTH
ITAIL
SPD
+VS –1.2V
DISABLE
Q9
TO DISABLE
CIRCUITRY
ITH
–VS
Q10
AD8029 ONLY
MTOP
Q1
IN–
OUTPUT
BUFFER
R3 R4
R 1 R2
Q5
CMT
Q2
Q6
VOUT
CMB
Q7
Q8
Q3
IN+
Q4
MBOT
R5 R6 R7 R8
Q11
OUT
IN
COM
–VS
03679-0-051
Figure 50. Simplified Schematic
OUTPUT STAGE
The AD8029 (single), AD8030 (dual), and AD8040 (quad) are
rail-to-rail input and output amplifiers fabricated using Analog
Devices’ XFCB process. The XFCB process enables the
AD8029/ AD8030/AD8040 to operate on 2.7 V to 12 V supplies
with a 120 MHz bandwidth and a 60 V/µs slew rate. A
simplified sche-matic of the AD8029/AD8030/AD8040 is
shown in Figure 50.
The currents derived from the PNP and NPN input differential
pairs are injected into the current mirrors MBOT and MTOP, thus
establishing a common-mode signal voltage at the input of the
output buffer.
INPUT STAGE
1.
It buffers and applies the desired signal voltage to the
output devices, Q10 and Q11.
2.
It senses the common-mode current level in the output
devices.
3.
It regulates the output common-mode current by
establishing a common-mode feedback loop.
For input common-mode voltages less than a set threshold
(1.2 V below VCC), the resistor degenerated PNP differential
pair (comprising Q1 toQ4) carries the entire ITAIL current,
allowing the input voltage to go 200 mV below –VS. Conversely,
input common-mode voltages exceeding the same threshold
cause ITAIL to be routed away from the PNP differential pair and
into the NPN differential pair through transistor Q9. Under this
condition, the input common-mode voltage is allowed to rise
200 mV above +VS while still maintaining linear amplifier
behavior. The transition between these two modes of operation
leads to a sudden, temporary shift in input stage transconductance, gm, and dc parameters (such as the input offset voltage
VOS), which in turn adversely affect the distortion performance.
The SPD block shortens the duration of this transition, thus
improving the distortion performance. As shown in Figure 50,
the input differential pair is protected by a pair of two series
diodes, connected in anti-parallel, which clamp the differential
input voltage to approximately ±1.5 V.
The output buffer performs three functions:
The output devices Q10 and Q11 work in a common-emitter
configuration, and are Miller-compensated by internal
capacitors, CMT and CMB.
The output voltage compliance is set by the output devices’
collector resistance RC (about 25 Ω), and by the required load
current IL. For instance, a light equivalent load (5 kΩ) allows the
output voltage to swing to within 40 mV of either rail, while
heavier loads cause this figure to deteriorate as RC × IL.
Rev. B | Page 16 of 24
Data Sheet
AD8029/AD8030/AD8040
APPLICATIONS
WIDEBAND OPERATION
For example, if using the values shown in Table 5 for a gain of 2,
with resistor values of 2.5 kΩ, the effective load at the output is
1.67 kΩ. For inverting configurations, only the feedback resistor
RF is in parallel with the output load. If the load is greater than
that specified in the data sheet, the amplifier can introduce
nonlinearities in its open-loop response, which increases
distortion. Figure 53 and Figure 54 illustrate effective output
loading and distortion performance. Increasing the resistance of
the feedback network can reduce the current consumption, but
has other implications.
RF
C2
10µF
C1
0.1µF
RG
–
AD8029
VOUT
R1
+
DISABLE
C4
0.1µF
C3
10µF
–VS
–40
VS = 5V
0.1V p-p
VOUT = 2.0V
–50 SECOND HARMONIC – SOLID LINES
THIRD HARMONIC – DOTTED LINES
03679-0-052
HARMONIC DISTORTION (dBc)
R1 = RF||RG
Figure 51. Wideband Non-inverting Gain Configuration
RF
+VS
C2
10µF
C1
0.1µF
VIN
RG
–
AD8029
+
VOUT
RL = 1kΩ
–80
–90
RL = 2.5kΩ
0.1
1.0
FREQUENCY (MHz)
10
10
Figure 53. Gain of 1 Distortion
C3
10µF
–VS
RL = 5kΩ
–100
–120
0.01
C4
0.1µF
R1
–70
–110
DISABLE
R1 = RF||RG
–60
03679-A-008
VIN
03679-A-009
+VS
–40
VS = 5V
0.1V p-p
VOUT = 2.0V
–50 SECOND HARMONIC – SOLID LINES
THIRD HARMONIC – DOTTED LINES
03679-0-053
OUTPUT LOADING SENSITIVITY
To achieve maximum performance and low power dissipation,
the designer needs to consider the loading at the output of
AD8029/AD8030/AD8040. Table 5 shows the effects of output
loading and performance.
When operating at unity gain, the effective load at the amplifier
output is the resistance (RL) being driven by the amplifier. For
gains other than 1, in noninverting configurations, the feedback
network represents an additional current load at the amplifier
output. The feedback network (RF + RG) is in parallel with RL,
which lowers the effective resistance at the output of the
amplifier. The lower effective resistance causes the amplifier to
supply more current at the output. Lower values of feedback
resistance increase the current draw, thus increasing the
amplifier’s power dissipation.
HARMONIC DISTORTION (dBc)
Figure 52. Wideband Inverting Gain Configuration
Rev. B | Page 17 of 24
–60
RF = RL = 1kΩ
–70
–80
RF = RL = 5kΩ
–90
–100
RF = RL = 2.5kΩ
–110
–120
0.01
0.1
1.0
FREQUENCY (MHz)
Figure 54. Gain of 2 Distortion
AD8029/AD8030/AD8040
Data Sheet
Table 5. Effect of Load on Performance
Noninverting
Gain
1
1
1
2
2
2
–1
–1
–1
RF
(kΩ)
0
0
0
1
2.5
5
1
2.5
5
RG
(kΩ)
N/A
N/A
N/A
1
2.5
5
1
2.5
5
RLOAD
(kΩ)
1
2
5
1
2.5
5
1
2.5
5
–3 dB SS BW
(MHz)
120
130
139
36
44.5
43
40
40
34
The feedback resistance (RF || RG) combines with the input
capacitance to form a pole in the amplifier’s loop response. This
can cause peaking and ringing in the amplifier’s response if the
RC time constant is too low. Figure 55 illustrates this effect.
Peaking can be reduced by adding a small capacitor (1 pF–4 pF)
across the feedback resistor. The best way to find the optimal
value of capacitor is to empirically try it in your circuit. Another
factor of higher resistance values is the impact it has on noise
performance. Higher resistor values generate more noise. Each
application is unique and therefore a balance must be reached
between distortion, peaking, and noise performance. Table 5
outlines the trade-offs that different loads have on distortion,
peaking, and noise performance. In gains of 1, 2, and 10,
equivalent loads of 1 kΩ, 2 kΩ, and 5 kΩ are shown.
With increasing load resistance, the distortion and –3 dB
bandwidth improve, while the noise and peaking degrade
slightly.
VS = 5V
VOUT = 0.1V p-p
1
RF = RL = 2.5kΩ
Disable Pin
Voltage
Low
(Disabled)
High
(Enabled)
RL = 5kΩ
RF = RL = 1kΩ
–3
–4
G = +1
–5
–6
G = +2
–7
–8
1
10
100
FREQUENCY (MHz)
1000
Output Noise
(nV/√Hz)
16.5
16.5
16.5
33.5
34.4
36
33.6
34
36
Table 6. Disable Pin Control Voltage
RL = 2.5kΩ
–2
HD3 at 1 MHz,
2 V p-p (dB)
–72
–83
–92.5
–60
–72.5
–86
–57
–68
–80
The AD8029 disable pin allows the amplifier to be shut down
for power conservation or multiplexing applications. When in
the disable mode, the amplifier draws only 150 µA of quiescent
current. The disable pin control voltage is referenced to the
negative supply. The amplifier enters power-down mode any
time the disable pin is tied to the most negative supply or within
0.8 V of the negative supply. If left open, the amplifier will
operate normally. For switching levels, refer to Table 6.
RF = RL = 5kΩ
RL = 1kΩ
0
–1
HD2 at 1 MHz,
2 V p-p (dB)
–80
–84
–87.5
–72
–79
–84
–68
–74
–78
DISABLE PIN
03679-A-007
NORMALIZED CLOSED-LOOP GAIN (dB)
2
Peaking
(dB)
0.02
0.6
1
0
0.2
2
0.01
0.05
1
Figure 55. Frequency Response for Various Feedback/Load Resistances
Rev. B | Page 18 of 24
Supply Voltage
+3 V
+5 V
±5 V
0 V to <0.8 V
0 V to <0.8 V
–5 V to <–4 .2 V
1.2 V to 3 V
1.2 V to 5 V
–3.8 V to +5 V
Data Sheet
AD8029/AD8030/AD8040
CIRCUIT CONSIDERATIONS
PCB Layout
Power Supply Bypassing
High speed op amps require careful attention to PCB layout to
achieve optimum performance. Particular care must be
exercised to minimize lead lengths of the bypass capacitors.
Excess lead inductance can influence the frequency response
and even cause high frequency oscillations. Using a multilayer
board with an internal ground plane can help reduce ground
noise and enable a more compact layout.
Power supply pins are actually inputs to the op amp. Care must
be taken to provide the op amp with a clean, low noise dc
voltage source.
To achieve the shortest possible trace length at the inverting
input, the feedback resistor, RF, should be located the shortest
distance from the output pin to the input pin. The return node
of the resistor RG should be situated as close as possible to the
return node of the negative supply bypass capacitor.
On multilayer boards, all layers beneath the op amp should be
cleared of metal to avoid creating parasitic capacitive elements.
This is especially true at the summing junction, i.e., the inverting input, –IN. Extra capacitance at the summing junction can
cause increased peaking in the frequency response and lower
phase margin.
Grounding
To minimize parasitic inductances and ground loops in high
speed, densely populated boards, a ground plane layer is critical.
Understanding where the current flows in a circuit is critical in
the implementation of high speed circuit design. The length of
the current path is directly proportional to the magnitude of the
parasitic inductances and thus the high frequency impedance of
the path. Fast current changes in an inductive ground return
will create unwanted noise and ringing.
The length of the high frequency bypass capacitor pads and
traces is critical. A parasitic inductance in the bypass grounding
works against the low impedance created by the bypass
capacitor. Because load currents flow from supplies as well as
from ground, the load should be placed at the same physical
location as the bypass capacitor ground. For large values of
capacitors, which are intended to be effective at lower
frequencies, the current return path length is less critical.
Power supply bypassing is employed to provide a low impedance path to ground for noise and undesired signals at all
frequencies. This cannot be achieved with a single capacitor
type; but with a variety of capacitors in parallel the bandwidth
of power supply bypassing can be greatly extended. The bypass
capacitors have two functions:
1.
Provide a low impedance path for noise and undesired
signals from the supply pins to ground.
2.
Provide local stored charge for fast switching conditions
and minimize the voltage drop at the supply pins during
transients. This is typically achieved with large electrolytic
capacitors.
Good quality ceramic chip capacitors should be used and
always kept as close as possible to the amplifier package. A
parallel combination of a 0.1 µF ceramic and a 10 µF electrolytic
covers a wide range of rejection for unwanted noise. The 10 µF
capacitor is less critical for high frequency bypassing and, in
most cases, one per supply line is sufficient. The values of
capacitors are circuit-dependant and should be determined by
the system’s requirements.
DESIGN TOOLS AND TECHNICAL SUPPORT
Analog Devices is committed to the design process by providing
technical support and online design tools. ADI offers technical
support via free evaluation boards, sample ICs, Spice models,
interactive evaluation tools, application notes, phone and email
support—all available at www.analog.com.
Rev. B | Page 19 of 24
AD8029/AD8030/AD8040
Data Sheet
OUTLINE DIMENSIONS
5.00 (0.1968)
4.80 (0.1890)
5
1
4
4.00 (0.1575)
3.80 (0.1496)
6.20 (0.2441)
5.80 (0.2284)
8
14
1
7
6.20 (0.2441)
5.80 (0.2283)
1.27 (0.0500)
BSC
1.27 (0.0500)
BSC
0.25 (0.0098)
0.10 (0.0040)
1.75 (0.0688)
1.35 (0.0532)
0.51 (0.0201)
0.31 (0.0122)
COPLANARITY
0.10
SEATING
PLANE
0.50 (0.0196)
0.25 (0.0099)
45°
0.25 (0.0098)
0.10 (0.0039)
8°
0°
COPLANARITY
0.10
0.25 (0.0098)
0.17 (0.0067)
0.25 (0.0098)
0.17 (0.0067)
1.27 (0.0500)
0.40 (0.0157)
012407-A
5.10
5.00
4.90
5
4
1
2
3
2.40
2.10
1.80
14
8
4.50
4.40
4.30
0.65 BSC
6.40
BSC
1
PIN 1
SEATING
PLANE
0.30
0.15
0.65 BSC
0.46
0.36
0.26
0.22
0.08
COMPLIANT TO JEDEC STANDARDS MO-203-AB
1.05
1.00
0.80
6
5
1
2
3
4
PIN 1
INDICATOR
0.65 BSC
1.95
BSC
0.38 MAX
0.22 MIN
0.22 MAX
0.08 MIN
SEATING
PLANE
8°
4°
0°
0.60
BSC
COMPLIANT TO JEDEC STANDARDS MO-178-BA
0.60
0.45
0.30
12-16-2008-A
1.45 MAX
0.95 MIN
8°
0°
0.75
0.60
0.45
Figure 60. 14-Lead Thin Shrink Small Outline Package [TSSOP]
(RU-14)
Dimensions shown in millimeters
3.00
2.80
2.60
1.30
1.15
0.90
0.30
0.19
SEATING
PLANE
0.20
0.09
COMPLIANT TO JEDEC STANDARDS MO-153-AB-1
3.00
2.90
2.80
7
1.20
MAX
0.15
0.05
COPLANARITY
0.10
Figure 57. 6-Lead Plastic Surface-Mount Package [SC70]
(KS-6)
Dimensions shown in millimeters
8
7
0.40
0.10
1.10
0.80
072809-A
1.00
0.90
0.70
Figure 58. 8-Lead Small Outline Transistor Package [SOT-23]
(RJ-8)
Dimensions shown in millimeters
Rev. B | Page 20 of 24
061908-A
6
1.30 BSC
0.15 MAX
0.05 MIN
45°
8°
0°
Figure 59. 14-Lead Standard Small Outline Package [SOIC_N]
(R-14)
Dimensions shown in millimeters and (inches)
2.20
2.00
1.80
1.70
1.60
1.50
0.50 (0.0197)
0.25 (0.0098)
COMPLIANT TO JEDEC STANDARDS MS-012-AB
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
Figure 56. 8-Lead Standard Small Outline Package, Narrow Body [SOIC_N]
(R-8)
Dimensions shown in millimeters and (inches)
0.10 MAX
COPLANARITY
0.10
SEATING
PLANE
0.51 (0.0201)
0.31 (0.0122)
1.27 (0.0500)
0.40 (0.0157)
COMPLIANT TO JEDEC STANDARDS MS-012-AA
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
1.35
1.25
1.15
1.75 (0.0689)
1.35 (0.0531)
060606-A
8
4.00 (0.1574)
3.80 (0.1497)
8.75 (0.3445)
8.55 (0.3366)
Data Sheet
AD8029/AD8030/AD8040
ORDERING GUIDE
Model1, 2
AD8029ARZ
AD8029AR-REEL
AD8029ARZ-REEL
AD8029AR-REEL7
AD8029ARZ-REEL7
AD8029AKSZ-R2
AD8029AKSZ-REEL
AD8029AKSZ-REEL7
AD8030AR
AD8030ARZ
AD8030ARZ-REEL
AD8030ARZ-REEL7
AD8030ARJZ-R2
AD8030ARJZ-REEL
AD8030ARJZ-REEL7
AD8040ARZ
AD8040ARZ-REEL
AD8040ARZ-REEL7
AD8040ARUZ
AD8040ARU-REEL
AD8040ARUZ-REEL
AD8040ARUZ-REEL7
AD8040WARUZ-REEL7
AD8029AR-EBZ
AD8029AKS-EBZ
AD8030AR-EBZ
AD8030ARJ-EBZ
AD8040AR-EBZ
AD8040ARU-EBZ
1
2
Minimum
Ordering Quantity
98
2,500
2,500
1,000
1,000
250
10,000
3,000
98
98
2,500
1,000
250
10,000
3,000
56
2,500
1,000
96
2,500
2,500
1,000
1,000
Temperature
Range
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Package Description
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead SOIC_N
6-Lead SC70
6-Lead SC70
6-Lead SC70
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead SOIC_N
8-Lead SOT23-8
8-Lead SOT23-8
8-Lead SOT23-8
14-Lead SOIC_N
14-Lead SOIC_N
14-Lead SOIC_N
14-Lead TSSOP
14-Lead TSSOP
14-Lead TSSOP
14-Lead TSSOP
14-Lead TSSOP
Evaluation Board for AD8029, 8-Lead SOIC_N
Evaluation Board for AD8029, 6-Lead SC70
Evaluation Board for AD8030, 8-Lead SOIC_N
Evaluation Board for AD8030, 8-Lead SOT23-8
Evaluation Board for AD8040, 14-Lead SOIC_N
Evaluation Board for AD8040, 14-Lead TSSOP
Package
Option
R-8
R-8
R-8
R-8
R-8
KS-6
KS-6
KS-6
R-8
R-8
R-8
R-8
RJ-8
RJ-8
RJ-8
R-14
R-14
R-14
RU-14
RU-14
RU-14
RU-14
RU-14
Branding
H03
H03
H03
H7B
H7B
H7B
Z = RoHS Compliant Part.
W = Qualified for Automotive Applications.
AUTOMOTIVE PRODUCTS
The AD8040W models are available with controlled manufacturing to support the quality and reliability requirements of automotive
applications. Note that these automotive models may have specifications that differ from the commercial models; therefore, designers
should review the Specifications section of this data sheet carefully. Only the automotive grade products shown are available for use in
automotive applications. Contact your local Analog Devices account representative for specific product ordering information and to
obtain the specific Automotive Reliability reports for these models.
Rev. B | Page 21 of 24
AD8029/AD8030/AD8040
Data Sheet
NOTES
Rev. B | Page 22 of 24
Data Sheet
AD8029/AD8030/AD8040
NOTES
Rev. B | Page 23 of 24
AD8029/AD8030/AD8040
Data Sheet
NOTES
©2003–2012 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D03679-0-10/12(B)
Rev. B | Page 24 of 24