PIN CONFIGURATIONS
OUT 1
+IN 3
NC
7
VCC
6
OUT
5
NC
NC = NO CONNECT
OUT A 1
–IN A 2
+IN A 3
V– 4
AD8642
TOP VIEW
(Not to Scale)
8
V+
7
OUT B
6
–IN B
5
+IN B
05072-105
Figure 2. 8-Lead SOIC (R-8)
OUT A 1
–IN A 2
AD8642
+IN A 3
TOP VIEW
(Not to Scale)
V– 4
8
V+
7
OUT B
6
–IN B
5
+IN B
05072-064
Figure 3. 8-Lead SOIC (R-8)
Figure 4. 8-Lead MSOP (RM-8)
OUT A 1
14
OUT D
–IN A 2
13
–IN D
12
+IN D
+IN A 3
V+ 4
+IN B 5
AD8643
TOP VIEW
11 V–
(Not to Scale)
10 +IN C
–IN B 6
9
–IN C
OUT B 7
8
OUT C
Figure 5. 14-Lead SOIC (R-14)
+IN B 4
PIN 1
INDICATOR
AD8643
TOP VIEW
12 –IN D
11 +IN D
10 V–
9 +IN C
NOTES
1. NC = NO CONNECT.
2. EXPOSED PAD SHOULD BE CONNECTED TO V+.
05072-104
–IN A 1
+IN A 2
V+ 3
–IN B 5
The AD8641/AD8642/AD8643 are fully specified over the
extended industrial temperature range of –40°C to +125°C. The
AD8641 is available in 5-lead SC70 and 8-lead SOIC lead-free
packages. The AD8642 is available in 8-lead MSOP and 8-lead
SOIC lead-free packages. The AD8643 is available in 14-lead
SOIC and 16-lead, 3 mm × 3 mm, LFCSP lead-free packages.
TOP VIEW
(Not to Scale)
8
05072-103
The AD8641/AD8642/AD8643 are suitable for applications
utilizing multichannel boards that require low power to manage
heat. Other applications include photodiodes, ATE reference
level drivers, battery management, and industrial controls.
AD8641
05072-102
NC 1
–IN 2
13 NC
The AD8641/AD8642/AD8643 are low power, precision JFET
input amplifiers featuring extremely low input bias current and
rail-to-rail output. The ability to swing nearly rail-to-rail at the
input and rail-to-rail at the output enables designers to buffer
CMOS DACs, ASICs, and other wide output swing devices in
single-supply systems. The outputs remain stable with
capacitive loads of more than 500 pF.
–IN
Figure 1. 5-Lead SC70 (KS-5)
14 OUT D
GENERAL DESCRIPTION
4
TOP VIEW
(Not to Scale)
+IN 3
16 NC
Line-/battery-powered instruments
Photodiode amplifiers
Precision current sensing
Medical instrumentation
Industrial controls
Precision filters
Portable audio
ATE
VCC
05072-101
VEE 2
VEE 4
APPLICATIONS
5
AD8641
–IN C 8
Low supply current: 250 μA max
Very low input bias current: 1 pA max
Low offset voltage: 750 μV max
Single-supply operation: 5 V to 26 V
Dual-supply operation: ±2.5 V to ±13 V
Rail-to-rail output
Unity-gain stable
No phase reversal
SC70 package
15 OUT A
FEATURES
OUT B 6
OUT C 7
Data Sheet
Low Power, Rail-to-Rail Output, Precision
JFET Amplifiers
AD8641/AD8642/AD8643
Figure 6. 16-Lead LFCSP (CP-16) (Not Drawn to Scale)
Rev. E
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
www.analog.com
Fax: 781.461.3113 ©2004–2011 Analog Devices, Inc. All rights reserved.
AD8641/AD8642/AD8643
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1 Absolute Maximum Ratings ............................................................5 Applications....................................................................................... 1 Thermal Resistance .......................................................................5 General Description ......................................................................... 1 ESD Caution...................................................................................5 Pin Configurations ........................................................................... 1 Typical Performance Characteristics ..............................................6 Revision History ............................................................................... 2 Outline Dimensions ....................................................................... 13 Specifications..................................................................................... 3 Ordering Guide .......................................................................... 15 Electrical Characteristics............................................................. 3 REVISION HISTORY
9/11—Rev. D to Rev. E
Changes to Thermal Resistance Section........................................ 5
7/11—Rev. C to Rev. D
Changes to Figure 6.......................................................................... 1
11/10—Rev. B to Rev. C
Changes to Figure 6.......................................................................... 1
Added Thermal Resistance Section and Table 4 .......................... 5
Updated Outline Dimensions ....................................................... 13
Changes to Ordering Guide .......................................................... 15
4/05—Rev. A to Rev. B
Added AD8643 ...................................................................Universal
Added 14-Lead SOIC .........................................................Universal
Added 16-Lead LFCSP.......................................................Universal
Updated Outline Dimensions ....................................................... 13
Changes to Ordering Guide .......................................................... 14
3/05—Rev. 0 to Rev. A
Added AD8642 ...................................................................Universal
Changes to General Description .....................................................1
Added Figure 3 and Figure 4............................................................1
Changes to Specifications.................................................................3
Changes to Absolute Maximum Ratings........................................5
Changes to Figure 22.........................................................................8
Changes to Figure 23.........................................................................9
Changes to Figure 41...................................................................... 12
Updated Outline Dimensions....................................................... 13
Changes to Ordering Guide .......................................................... 14
10/04—Initial Version: Revision 0
Rev. E | Page 2 of 16
Data Sheet
AD8641/AD8642/AD8643
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
VS = 5.0 V, VCM = 2.5 V, TA = 25°C, unless otherwise noted.
Table 1.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Symbol
Conditions
Min
VOS
Typ
Max
Unit
50
750
1
1.5
1.6
1
180
0.5
60
3
93
140
2.5
μV
mV
mV
mV
pA
pA
pA
pA
V
dB
V/mV
μV/°C
0.01
±6
V
V
V
V
mA
AD8643 LFCSP only
–40°C < TA < +85°C
+85°C < TA < +125°C, VCM = 1.5 V
Input Bias Current
IB
0.25
–40°C < TA < +125°C
Input Offset Current
IOS
–40°C < TA < +125°C
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
Offset Voltage Drift
OUTPUT CHARACTERISTICS
Output Voltage High
CMRR
AVO
∆VOS/∆T
VCM = 0 V to 2.5 V
RL = 10 kΩ, VO = 0.5 to 4.5 V
–40°C < TA < +125°C
VOH
IL = 1 mA, –40°C to +125°C
Output Voltage Low
0
74
80
4.95
4.94
VOL
IL = 1 mA, –40°C to +125°C
Output Current
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current/Amplifier
IOUT
PSRR
ISY
VS = 5 V to 26 V
90
107
195
–40°C < TA < +125°C
DYNAMIC PERFORMANCE
Slew Rate
Gain Bandwidth Product
Phase Margin
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
Current Noise Density
SR
GBP
250
270
dB
μA
μA
AD8641, AD8642
AD8643
2
3
2.5
50
V/μs
MHz
MHz
Degrees
f = 0.1 Hz to 10 Hz
f = 1 kHz
f = 1 kHz
4.0
28.5
0.5
μV p-p
nV/√Hz
fA/√Hz
Øm
eN p-p
eN
iN
0.05
0.05
Rev. E | Page 3 of 16
AD8641/AD8642/AD8643
Data Sheet
VS= ±13 V, VCM = 0 V, TA =25°C, unless otherwise noted.
Table 2.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Symbol
Conditions
Min
VOS
Typ
Max
Unit
70
750
1
1.5
1
260
0.5
65
+10
107
290
2.5
μV
mV
mV
pA
pA
pA
pA
V
dB
V/mV
μV/°C
±12
V
V
V
V
mA
AD8643 LFCSP only
–40° < TA < +125°C
Input Bias Current
IB
0.25
–40°C < TA < +125°C
Input Offset Current
IOS
–40°C < TA < +125°C
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
Offset Voltage Drift
OUTPUT CHARACTERISTICS
Output Voltage High
CMRR
AVO
∆VOS/∆T
VCM = −13 V to +10 V
RL = 10 kΩ, VO = –11 V to +11 V
–40°C < TA < +125°C
VOH
IL = 1 mA, –40°C to +125°C
Output Voltage Low
–13
90
215
+12.95
+12.94
VOL
–12.95
–12.94
IL = 1 mA, –40°C to +125°C
Output Current
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current/Amplifier
IOUT
PSRR
ISY
VS = ±2.5 V to ±13 V
90
107
200
–40°C < TA < +125°C
DYNAMIC PERFORMANCE
Slew Rate
Gain Bandwidth Product
Phase Margin
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
Current Noise Density
SR
GBP
Øm
eN p-p
eN
iN
f = 0.1 Hz to 10 Hz
f = 1 kHz
f = 1 kHz
Rev. E | Page 4 of 16
290
330
dB
μA
μA
3
3.5
60
V/μs
MHz
Degrees
4.2
27.5
0.5
μV p-p
nV/√Hz
fA/√Hz
Data Sheet
AD8641/AD8642/AD8643
ABSOLUTE MAXIMUM RATINGS
Absolute maximum ratings apply at 25°C, unless otherwise noted.
Table 3.
Parameter
Supply Voltage
Input Voltage
Differential Input Voltage
Output Short-Circuit Duration
Storage Temperature Range
KS-5, R-8, RM-8, R-14, CP-16 Packages
Operating Temperature Range
Junction Temperature Range
KS-5, R-8, RM-8, R-14, CP-16 Packages
Lead Temperature (Soldering, 60 sec)
Rating
27.3 V
VS− to VS+
±Supply Voltage
Indefinite
−65°C to +150°C
−40°C to +125°C
−65°C to +150°C
300°C
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.
THERMAL RESISTANCE
θJA is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages. This
was measured using a standard 4-layer board. For the LFCSP
package, solder the exposed pad to a copper plane, which
should be connected to V+.
Table 4.
Package Type
5-Lead SC70 (KS)
8-Lead SOIC (R)
8-Lead MSOP (RM)
14-Lead SOIC (R)
16-Lead LFCSP (CP)
ESD CAUTION
Rev. E | Page 5 of 16
θJA
430
121
142
110
81
θJC
149
43
45
36
16
Unit
°C/W
°C/W
°C/W
°C/W
°C/W
AD8641/AD8642/AD8643
Data Sheet
TYPICAL PERFORMANCE CHARACTERISTICS
20
80
VSY = ±13V
VSY = 5V
VCM = 1.5V
18
70
16
NUMBER OF AMPLIFIERS
FREQUENCY
60
50
40
30
20
14
12
10
8
6
9.5
10.0
9.0
8.5
8.0
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
0
TCVOS (μV/°C)
Figure 7. Input Offset Voltage
05072-005
VOS (mV)
1.0
0
05072-002
0
–0.60
–0.55
–0.50
–0.45
–0.40
–0.35
–0.30
–0.25
–0.20
–0.15
–0.10
–0.05
0
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0.55
0.60
2
0.5
4
10
Figure 10. Offset Voltage Drift
16
4.5
VSY = ±13V
4.0
14
VSY = ±13V
TA = 25°C
3.0
INPUT BIAS (pA)
NUMBER OF AMPLIFIERS
3.5
12
10
8
6
2.5
2.0
1.5
1.0
4
0.5
2
OFFSET VOLTAGE (μV/°C)
–0.5
05072-003
9.5
10.0
9.0
8.5
8.0
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0
0.5
0
–15 –13 –11
–9
–7
–5
–3
–1
1
3
5
7
9
11
13
15
VCM (V)
05072-006
0
Figure 11. Input Bias Current vs. VCM
Figure 8. Offset Voltage Drift
0.5
70
VSY = ±2.5V
0.4
60
VSY = ±13V
TA = 25°C
0.3
INPUT BIAS (pA)
0.2
40
30
0.1
0
–0.1
–0.2
20
–0.3
10
–15.0 –12.5 –10.0 –7.5
–5.0
–2.5
0
2.5
5.0
7.5
10.0
VCM (V)
Figure 12. Input Bias Current vs. VCM
Figure 9. Input Offset Voltage
Rev. E | Page 6 of 16
12.5
15.0
05072-007
VOS (mV)
05072-004
0
–0.4
–0.5
–0.60
–0.55
–0.50
–0.45
–0.40
–0.35
–0.30
–0.25
–0.20
–0.15
–0.10
–0.05
0
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0.55
0.60
FREQUENCY
50
Data Sheet
AD8641/AD8642/AD8643
1000
500
VSY = ±13V
VSY = 5V
400
200
VOS (μV)
INPUT BIAS CURRENT (pA)
300
100
10
100
0
–100
–200
1
–300
–400
25
50
75
100
125
150
TEMPERATURE (°C)
–500
0
0.5
1.0
1.5
2.0
05072-011
0
05072-008
0.1
2.5
VCM (V)
Figure 16. Input Offset Voltage vs. VCM
Figure 13. Input Bias Current vs. Temperature
10M
1.0
VSY = +5V OR ±5V
0.8
OPEN-LOOP GAIN (V/V)
0.6
INPUT BIAS (pA)
0.4
0.2
0
–0.2
–0.4
1M
VSY = ±13V
VSY = ±2.5V
100k
–0.6
–4
–3
–2
–1
0
1
2
3
4
5
VCM (V)
10k
0.1
Figure 14. Input Bias Current vs. VCM
1000
900
100
1000
A
B
800
C
700
100
AVO (V/mV)
600
500
400
300
D
E
10
200
A. VSY = ±13V, VO = ±11V, RL = 10kΩ
B. VSY = ±13V, VO = ±11V, RL = 2kΩ
C. VSY = +5V, VO = +0.5V/+4.5V, RL = 10kΩ
D. VSY = +5V, VO = +0.5V/+4.5V, RL = 2kΩ
E. VSY = +5V, VO = +0.5V/+4.5V, RL = 600Ω
100
0
–100
–9
–7
–5
–3
–1 0 1
3
5
7
9
VCM (V)
11
13
15
05072-010
VOS (μV)
10
Figure 17. Open-Loop Gain vs. Load Resistance
VSY = ±13V
–15 –13 –11
1
LOAD RESISTANCE (kΩ)
1
–50
–30
–10
10
30
50
70
90
110
130
TEMPERATURE (°C)
Figure 18. Open-Loop Gain vs. Temperature
Figure 15. Input Offset Voltage vs. VCM
Rev. E | Page 7 of 16
150
05072-013
–5
05072-009
–1.0
05072-012
–0.8
AD8641/AD8642/AD8643
Data Sheet
10000
600
VSY = ±13V
VSY = ±13V
500
SATURATION VOLTAGE (mV)
OFFSET VOLTAGE (μV)
400
300
200
100
0
100kΩ
–100
–200
–300
10kΩ 1kΩ
VSY – VOH
1000
100
–VSY – VOL
10
–400
–10
–5
0
5
10
15
OUTPUT VOLTAGE (V)
1
0.001
05072-014
–600
–15
0.01
0.1
1
10
05072-017
–500
100
LOAD CURRENT (mA)
Figure 22. Output Saturation Voltage vs. Load Current
Figure 19. Input Error Voltage vs. Output Voltage for Resistive Loads
10000
250
VSY = ±5V
200
VSY = 5V
POS RAIL
VSY – VOH
0
RL = 10kΩ
RL = 100kΩ
–50
–100
–150
–200
1000
RL = 100kΩ RL = 1kΩ
RL = 10kΩ
NEG RAIL
RL = 2kΩ
–300
–350
0
50
100
150
200
250
300
350
OUTPUT VOLTAGE FROM SUPPLY RAIL (mV)
100
10
1
0.001
05072-015
–250
VOL
0.01
0.1
1
10
Figure 23. Output Saturation Voltage vs. Load Current
800
70
VSY = ±13V
RL = 2kΩ
CL = 40pF
60
700
50
600
500
315
270
225
40
180
GAIN
GAIN (dB)
ISY (μA)
100
LOAD CURRENT (mA)
Figure 20. Input Error Voltage vs. Output Voltage
Within 300 mV of Supply Rails
400
300
+25°C
30
135
20
PHASE
90
10
45
0
0
+125°C
200
–55°C
–10
–45
–20
–90
0
8
12
16
VSY (V)
20
24
28
05072-016
100
4
05072-018
RL = 2kΩ
Figure 21. Quiescent Current vs. Supply Voltage at Different Temperatures
Rev. E | Page 8 of 16
–30
10k
–135
100k
1M
10M
FREQUENCY (Hz)
Figure 24. Open-Loop Gain and Phase Margin vs. Frequency
PHASE (Degrees)
RL = 1kΩ
50
05072-019
100
SATURATION VOLTAGE (mV)
INPUT VOLTAGE (μV)
150
Data Sheet
AD8641/AD8642/AD8643
50
GAIN
30
270
120
225
100
180
80
135
20
90
PHASE
10
45
0
0
–10
–20
–90
–30
10k
–135
100k
1M
VSY = ±13V
60
40
20
0
–45
–20
05072-020
GAIN (dB)
40
140
–40
–60
1k
10M
10k
100k
1M
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 25. Open-Loop Gain and Phase Margin vs. Frequency
Figure 28. CMRR vs. Frequency
140
70
60
50
10M
05072-023
60
315
CMRR (dB)
VSY = 5V
RL = 2kΩ
CL = 40pF
PHASE (Degrees)
70
VSY = ±13V
RL = 2kΩ
CL = 40pF
120
VSY = 5V
100
80
40
CMRR (dB)
GAIN (dB)
G = +100
30
20
G = +10
10
60
40
20
0
0
–20
–20
–40
10k
100k
1M
10M
FREQUENCY (Hz)
–60
1k
05072-021
–30
1k
10k
10M
10M
Figure 29. CMRR vs. Frequency
140
70
50
1M
FREQUENCY (Hz)
Figure 26. Closed-Loop Gain vs. Frequency
60
100k
05072-024
–10
05072-025
G = +1
VSY = 5V
RL = 2kΩ
CL = 40pF
120
VSY = ±13V
100
+PSRR
80
40
PSRR (dB)
20
G = +10
10
60
40
–PSRR
20
0
0
G = +1
–10
–20
–20
–40
–30
1k
10k
100k
1M
10M
FREQUENCY (Hz)
05072-022
GAIN (dB)
G = +100
30
Figure 27. Closed-Loop Gain vs. Frequency
–60
1k
10k
100k
1M
FREQUENCY (Hz)
Figure 30. PSRR vs. Frequency
Rev. E | Page 9 of 16
AD8641/AD8642/AD8643
Data Sheet
140
1.0
VSY = 5V
100
1
VIN
INPUT BIAS (pA)
0.4
60
40
–PSRR
20
0.2
0
–0.2
0
–0.4
–20
–0.6
–40
–0.8
2
100k
1M
10M
FREQUENCY (Hz)
VOUT
–1.0
CH1 –4
10.0V –3CH2 –2
10.0V–1
–5
CH1 4 1.00V5
0M400μ1s
2 A 3
T
0.00000s
VCM (V)
05072-009
10k
05072-026
–60
1k
Figure 34. No Phase Reversal
Figure 31. PSRR vs. Frequency
15
1000
VSY = ±13V
VS = ±13V
GAIN = +5
G = +100
10
100
TS + (1%)
OUTPUT SWING (V)
10
G = +10
1
G = +1
0.1
5
TS + (0.1%)
0
–5
TS – (0.1%)
–10
10k
100k
1M
10M
100M
FREQUENCY (Hz)
–15
05072-027
0.01
1k
TS – (1%)
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
SETTLING TIME (μs)
Figure 32. Output Impedance vs. Frequency
05072-030
ZOUT (Ω)
VSY = ±13V
0.6
+PSRR
80
PSRR (dB)
T
0.8
05072-029
120
Figure 35. Output Swing and Error vs. Settling Time
70
1000
VS = ±13V
RL = 10kΩ
VIN = 100mV p-p
AV = +1
VSY = 5V
G = +100
60
100
OVERSHOOT (%)
10
G = +10
1
G = +1
40
OS–
30
OS+
20
0.1
0.01
1k
10k
100k
1M
10M
FREQUENCY (Hz)
100M
Figure 33. Output Impedance vs. Frequency
0
1
10
100
1000
CAPACITANCE (pF)
Figure 36. Small Signal Overshoot vs. Load Capacitance
Rev. E | Page 10 of 16
05072-031
10
05072-028
ZOUT (Ω)
50
Data Sheet
AD8641/AD8642/AD8643
70
1k
40
OS–
30
OS+
20
0
1
10
100
1000
CAPACITANCE (pF)
10
1
05072-032
10
100
10
100
Figure 37. Small Signal Overshoot vs. Load Capacitance
10k
Figure 40. Voltage Noise Density
1k
1.0
VS = ±13V
G = +1M
CH1 p-p = 4.26V
VSY = 5V
VOLTAGE NOISE DENSITY (nV/ Hz)
0.8
0.6
0.4
INPUT BIAS (pA)
1k
FREQUENCY (Hz)
0.2
10
–0.2
–0.4
10
05072-033
–0.6
100
–1.0
CH1 –4
1.00V –3
–5
–2
–1
0M1.00s1
2 A CH1
3
1
05072-009
–0.8
4–20.0V5
VCM (V)
10
100
1k
10k
FREQUENCY (Hz)
05072-036
OVERSHOOT (%)
50
VSY = ±13V
05072-035
60
VOLTAGE NOISE DENSITY (nV/ Hz)
VS = ±2.5V
RL = 10kΩ
VIN = 100mV p-p
AV = +1
Figure 41. Voltage Noise Density
Figure 38. 0.1 Hz to 10 Hz Noise
0.004
1.0
VS = ±2.5V
G = +1M
CH1 p-p = 4.06V
0.8
VSY = ±13V
LOAD = 100kΩ
GAIN = +1
0.001
8V p-p INPUT
0.6
THD + NOISE (%)
0.2
10
–0.2
–0.4
1V p-p INPUT
2V p-p INPUT
0.0001
4V p-p INPUT
0.00001
–1.0
CH1 –4
1.00V –3
–5
–2
–1
0M1.00s1
2 A CH1
3
VCM (V)
4–20.0V5
0.000001
05072-009
–0.8
1
100
1k
10k
20k
FREQUENCY (Hz)
Figure 42. Total Harmonic Distortion + Noise vs. Frequency
Figure 39. 0.1 Hz to 10 Hz Noise
Rev. E | Page 11 of 16
05072-037
–0.6
05072-034
INPUT BIAS (pA)
0.4
AD8641/AD8642/AD8643
Data Sheet
–40
20kΩ
–50
2kΩ
–
–60
+
–70
VIN
–
2kΩ
2kΩ
+
–80
VIN = 18V p-p
–110
–120
VIN = 4.5V p-p
–130
–140
–150
–160
20
VIN = 9V p-p
100
05072-041
(dB)
–90
–100
1k
10k
100k
FREQUENCY (Hz)
Figure 43. Channel Separation
Rev. E | Page 12 of 16
Data Sheet
AD8641/AD8642/AD8643
OUTLINE DIMENSIONS
2.20
2.00
1.80
1.35
1.25
1.15
5
2.40
2.10
1.80
4
1
2
3
0.65 BSC
1.10
0.80
0.10 MAX
COPLANARITY
0.10
SEATING
PLANE
0.30
0.15
0.40
0.10
0.46
0.36
0.26
0.22
0.08
072809-A
1.00
0.90
0.70
COMPLIANT TO JEDEC STANDARDS MO-203-AA
Figure 44. 5-Lead Thin Shrink Small Outline Transistor Package [SC70]
(KS-5)
Dimensions shown in millimeters
5.00 (0.1968)
4.80 (0.1890)
1
5
4
1.27 (0.0500)
BSC
0.25 (0.0098)
0.10 (0.0040)
COPLANARITY
0.10
SEATING
PLANE
6.20 (0.2441)
5.80 (0.2284)
1.75 (0.0688)
1.35 (0.0532)
0.51 (0.0201)
0.31 (0.0122)
0.50 (0.0196)
0.25 (0.0099)
45°
8°
0°
0.25 (0.0098)
0.17 (0.0067)
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.
Figure 45. 8-Lead Standard Small Outline Package [SOIC_N]
(R-8)
Dimensions shown in millimeters and (inches)
Rev. E | Page 13 of 16
012407-A
8
4.00 (0.1574)
3.80 (0.1497)
AD8641/AD8642/AD8643
Data Sheet
3.20
3.00
2.80
8
3.20
3.00
2.80
5.15
4.90
4.65
5
1
4
PIN 1
IDENTIFIER
0.65 BSC
0.95
0.85
0.75
15° MAX
1.10 MAX
0.80
0.55
0.40
0.23
0.09
6°
0°
0.40
0.25
10-07-2009-B
0.15
0.05
COPLANARITY
0.10
COMPLIANT TO JEDEC STANDARDS MO-187-AA
Figure 46. 8-Lead Mini Small Outline Package [MSOP]
(RM-8)
Dimensions shown in millimeters
8.75 (0.3445)
8.55 (0.3366)
8
14
1
6.20 (0.2441)
5.80 (0.2283)
7
1.27 (0.0500)
BSC
0.25 (0.0098)
0.10 (0.0039)
COPLANARITY
0.10
0.50 (0.0197)
0.25 (0.0098)
1.75 (0.0689)
1.35 (0.0531)
SEATING
PLANE
0.51 (0.0201)
0.31 (0.0122)
45°
8°
0°
1.27 (0.0500)
0.40 (0.0157)
0.25 (0.0098)
0.17 (0.0067)
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.
060606-A
4.00 (0.1575)
3.80 (0.1496)
Figure 47. 14-Lead Standard Small Outline Package [SOIC_N]
(R-14)
Dimensions shown in millimeters and (inches)
0.60 MAX
3.00
BSC SQ
BOTTOM VIEW
13
12
0.45
TOP
VIEW
2.75
BSC SQ
0.80 MAX
0.65 TYP
12° MAX
SEATING
PLANE
0.05 MAX
0.02 NOM
0.30
0.23
0.18
1
*1.65
1.50 SQ
1.35
EXPOSED
PAD
0.50
BSC
0.90
0.85
0.80
16
PIN 1
INDICATOR
9
4
8
5
0.25 MIN
1.50 REF
FOR PROPER CONNECTION OF
THE EXPOSED PAD, REFER TO
THE PIN CONFIGURATION AND
FUNCTION DESCRIPTIONS
SECTION OF THIS DATA SHEET.
0.20 REF
*COMPLIANT TO JEDEC STANDARDS MO-220-VEED-2
EXCEPT FOR EXPOSED PAD DIMENSION.
Figure 48. 16-Lead Lead Frame Chip Scale Package [LFCSP_VQ]
3 mm × 3 mm Body, Very Thin Quad (CP-16-3)
Dimensions shown in millimeters
Rev. E | Page 14 of 16
07-17-2008-A
PIN 1
INDICATOR
0.50
0.40
0.30
Data Sheet
AD8641/AD8642/AD8643
ORDERING GUIDE
Model 1
AD8641AKSZ-R2
AD8641AKSZ-REEL7
AD8641AKSZ-REEL
AD8641ARZ
AD8641ARZ-REEL7
AD8641ARZ-REEL
AD8642ARMZ
AD8642ARMZ-REEL
AD8642ARZ
AD8642ARZ-REEL7
AD8642ARZ-REEL
AD8643ARZ
AD8643ARZ-REEL7
AD8643ARZ-REEL
AD8643ACPZ-R2
AD8643ACPZ-REEL7
AD8643ACPZ-REEL
1
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
Package Description
5-Lead SC70
5-Lead SC70
5-Lead SC70
8-lead SOIC_N
8-lead SOIC_N
8-lead SOIC_N
8-lead MSOP
8-lead MSOP
8-lead SOIC_N
8-lead SOIC_N
8-lead SOIC_N
14-lead SOIC_N
14-lead SOIC_N
14-lead SOIC_N
16-Lead LFCSP_VQ
16-Lead LFCSP_VQ
16-Lead LFCSP_VQ
Z = RoHS Compliant Part.
Rev. E | Page 15 of 16
Package Option
KS-5
KS-5
KS-5
R-8
R-8
R-8
RM-8
RM-8
R-8
R-8
R-8
R-14
R-14
R-14
CP-16-3
CP-16-3
CP-16-3
Branding
A07
A07
A07
A0A
A0A
AUA
AUA
AUA
AD8641/AD8642/AD8643
Data Sheet
NOTES
©2004–2011 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D05072-0-9/11(E)
Rev. E | Page 16 of 16