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Low Power, Precision, Auto-Zero Op Amps AD8538/AD8539
FEATURES
Low offset voltage: 13 V maximum Input offset drift: 0.03 V/C Single-supply operation: 2.7 V to 5.5 V High gain, CMRR, and PSRR Low input bias current: 25 pA Low supply current: 180 A
PIN CONFIGURATIONS
OUT V- +IN
1 5
V+
AD8538
2 3 4
-IN
Figure 1. 5-Lead TSOT-23 (UJ-5)
APPLICATIONS
Mobile communications Portable instrumentation Battery-powered devices Sensor interfaces Temperature measurement Electronic scales
NC
1
8
NC V+
-IN 2 +IN 3 V-
AD8538
7
NC = NO CONNECT
Figure 2. 8-Lead SOIC_N (R-8)
GENERAL DESCRIPTION
The AD8538/AD8539 are very high precision amplifiers featuring extremely low offset voltage, low input bias current, and low power consumption. The supply current is less than 215 A maximujm per amplifier at 5.0 V. Operation is fully specified from 2.7 V to 5.0 V single supply (1.35 V to 2.5 V dual supply). The AD8538/AD8539 operate at very low power making these amplifiers ideal for battery-powered devices and portable equipment. The AD8538/AD8539 are specified over the extended industrial temperature range (-40C to +125C). The AD8538 amplifier is available in 5-lead TSOT-23, and 8-lead, narrow body SOIC packages, and the AD8539 amplifier is available in 8-lead, narrow body SOIC and 8-lead MSOP.
OUT A 1 -IN A 2 +IN A 3
8
V+ OUT B +IN B
06741-033
06741-034
AD8539
7 6 5
TOP VIEW V- 4 (Not to Scale)
-IN B
Figure 3. 8-Lead SOIC_N (R-8)
OUT A 1 -IN A 2 +IN A 3 V- 4
8
AD8539
TOP VIEW (Not to Scale)
V+ OUT B -IN B +IN B
7 6 5
Figure 4. 8-Lead MSOP (RM-8)
Rev. A
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 (c)2005-2007 Analog Devices, Inc. All rights reserved.
06741-001
6 OUT TOP VIEW 4 (Not to Scale) 5 NC
06741-002
TOP VIEW (Not to Scale)
AD8538/AD8539 TABLE OF CONTENTS
Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Pin Configurations ........................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 AD8538 Electrical Specifications ............................................... 3 AD8539 Electrical Specifications ............................................... 5 Absolute Maximum Ratings ............................................................7 Thermal Resistance .......................................................................7 ESD Caution...................................................................................7 Typical Performance Characteristics ..............................................8 AD8538 Characteristics................................................................8 AD8539 Characteristics............................................................. 14 Outline Dimensions ....................................................................... 20 Ordering Guide .......................................................................... 21
REVISION HISTORY
5/07--Rev. 0 to Rev. A Added AD8539 ...................................................................Universal Changes to Specifications Section.................................................. 3 Added Table 3, Renumbered Tables Sequentially ........................ 5 Added Table 4, Renumbered Tables Sequentially ........................ 6 Changes to Thermal Resistance Section........................................ 7 Added Figure 32 and Figure 33..................................................... 13 Added AD8539 Characteristics Section, Renumbered Figures Sequentially ..................................................................................... 14 Updated Outline Dimensions....................................................... 20 Changes to Ordering Guide .......................................................... 21 10/05--Revision 0: Initial Version
Rev. A | Page 2 of 24
AD8538/AD8539 SPECIFICATIONS
AD8538 ELECTRICAL SPECIFICATIONS
@ VS = 5.0 V, VCM = 2.5 V, VO = 2.5 V, TA = 25C, unless otherwise specified. Table 1.
Parameter INPUT CHARACTERISTICS Offset Voltage Input Bias Current Symbol VOS -40C TA +125C IB -40C TA +85C -40C TA +125C Input Offset Current Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain Offset Voltage Drift OUTPUT CHARACTERISTICS Output Voltage High IOS -40C TA +125C CMRR AVO VOS/T VOH VCM = 0 V to 5 V -40C TA +125C, VCM = 0.2 V to 4.8 V RL = 10 k, VO = 0.1 V to 4.9 V -40C TA +125C -40C TA +125C RL = 100 k to ground -40C TA +125C, RL = 100 k to ground RL = 10 k to ground -40C TA +125C, RL = 10 k to ground RL = 100 k to V+ -40C TA +125C, RL = 100 k to V+ RL = 10 k to V+ -40C TA +125C, RL = 10 k to V+ 0 115 100 115 110 150 135 141 135 0.03 4.998 4.970 1.9 2.8 17 20 25 105 100 125 125 150 190 0.4 10 0.05 430 65 2.0 50 5 7 20 30 15 35 0.7 20 Conditions Min Typ 5 Max 13 30 25 100 1.0 50 150 5 Unit V V pA pA nA pA pA V dB dB dB dB V/C V V V V mV mV mV mV mA dB dB A A V/s s ms kHz Degrees V p-p nV/Hz
0.1
4.99 4.98 4.95 4.94
Output Voltage Low
VOL
Short-Circuit Limit POWER SUPPLY Power Supply Rejection Ratio Supply Current/Amplifier DYNAMIC PERFORMANCE Slew Rate Settling Time 0.01% Overload Recovery Time Gain Bandwidth Product Phase Margin NOISE PERFORMANCE Voltage Noise Voltage Noise Density
ISC PSRR ISY VS = 2.7 V to 5.0 V -40C TA +125C IO = 0 -40C TA +125C RL =10 k G = 1, 2 V step, CL = 20 pF, RL = 1 k
180 215
SR tS GBP OM en p-p en
RL = 10 k, RL = 100 k, CL = 20 pF f = 0.1 Hz to 10 Hz f = 1 kHz
Rev. A | Page 3 of 24
AD8538/AD8539
@ VS = 2.7 V, VCM = 1.35 V, VO = 1.35 V, TA = 25C, unless otherwise specified. Table 2.
Parameter INPUT CHARACTERISTICS Offset Voltage Input Bias Current Symbol VOS -40C TA +125C IB -40C TA +85C -40C TA +125C Input Offset Current Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain Offset Voltage Drift OUTPUT CHARACTERISTICS Output Voltage High IOS -40C TA +125C CMRR AVO VOS/T VOH VCM = 0 V to 2.5 V -40C TA +125C RL = 10 k, VO = 0.1 V to 1.7 V -40C TA +125C -40C TA +125C RL = 100 k to ground -40C TA +125C, RL = 100 k to ground RL = 10 k to ground -40C TA +125C, RL = 10 k to ground RL = 100 k to V+ -40C TA +125C, RL = 100 k to V+ RL = 10 k to V+ -40C TA +125C, RL = 10 k to V+ 0 110 100 110 105 140 135 140 135 0.03 2.698 2.68 1.7 2.4 14 20 8 105 100 125 125 150 190 0.35 5 0.05 430 65 2.0 50 5 5 20 25 15 35 0.7 20 Conditions Min Typ 5 Max 13 30 25 100 1.0 50 150 2.7 Unit V V pA pA nA pA pA V dB dB dB dB V/C V V V V mV mV mV mV mA dB dB A A V/s s ms kHz Degrees V p-p nV/Hz
0.1
2.68 2.68 2.67 2.66
Output Voltage Low
VOL
Short-Circuit Limit POWER SUPPLY Power Supply Rejection Ratio Supply Current/Amplifier DYNAMIC PERFORMANCE Slew Rate Settling Time 0.01% Overload Recovery Time Gain Bandwidth Product Phase Margin NOISE PERFORMANCE Voltage Noise Voltage Noise Density
ISC PSRR ISY VS = 2.7 V to 5.5 V -40C TA +125C IO = 0 -40C TA +125C RL = 10 k G = 1, 1 V step, CL = 20 pF, RL = 1 k
180 215
SR tS GBP OM en p-p en
RL = 10 k, RL = 100 k, CL = 20 pF f = 0.1 Hz to 10 Hz f = 1 kHz
Rev. A | Page 4 of 24
AD8538/AD8539
AD8539 ELECTRICAL SPECIFICATIONS
@ VS = 5.0 V, VCM = 2.5 V, VO = 2.5 V, TA = 25C, unless otherwise specified. Table 3.
Parameter INPUT CHARACTERISTICS Offset Voltage Input Bias Current Symbol VOS -40C TA +125C IB -40C TA +85C -40C TA +125C Input Offset Current Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain Offset Voltage Drift OUTPUT CHARACTERISTICS Output Voltage High CMRR AVO VOS/T VOH -40C TA +125C VCM = 0 V to 5 V -40C TA +125C, VCM = 0.2 V to 4.8 V RL = 10 k, VO = 0.1 V to 4.9 V -40C TA +125C -40C TA +125C RL = 100 k to ground -40C TA +125C, RL = 100 k to ground RL = 10 k to ground -40C TA +125C, RL = 10 k to ground RL = 100 k to V+ -40C TA +125C, RL = 100 k to V+ RL = 10 k to V+ -40C TA +125C, RL = 10 k to V+ IOS -40C TA +125C 0 0.2 115 100 110 110 15 35 0.7 20 Conditions Min Typ 5 Max 15 30 60 125 1.0 70 400 5 4.8 Unit V V pA pA nA pA pA V V dB dB dB dB V/C V V V V mV mV mV mV mA dB dB A A V/s s ms kHz Degrees V p-p nV/Hz
135 130 130 125 0.03 4.994 4.97 5 6 20 24 25
0.1
4.99 4.98 4.95 4.94
Output Voltage Low
VOL
7 8 25 30
Short-Circuit Limit POWER SUPPLY Power Supply Rejection Ratio Supply Current/Amplifier DYNAMIC PERFORMANCE Slew Rate Settling Time 0.01% Overload Recovery Time Gain Bandwidth Product Phase Margin NOISE PERFORMANCE Voltage Noise Voltage Noise Density
ISC PSRR ISY VS = 2.7 V to 5.0 V -40C TA +125C IO = 0 -40C TA +125C RL =10 k G = 1, 2 V step, CL = 20 pF, RL = 1 k 105 100
125 125 170
210 225
SR tS GBP OM en p-p en
RL = 10 k, RL = 100 k, CL = 20 pF f = 0.1 Hz to 10 Hz f = 1 kHz
0.4 10 0.05 430 65 1.2 52
Rev. A | Page 5 of 24
AD8538/AD8539
@ VS = 2.7 V, VCM = 1.35 V, VO = 1.35 V, TA = 25C, unless otherwise specified. Table 4.
Parameter INPUT CHARACTERISTICS Offset Voltage Input Bias Current Symbol VOS -40C TA +125C IB -40C TA +85C -40C TA +125C Input Offset Current Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain Offset Voltage Drift OUTPUT CHARACTERISTICS Output Voltage High CMRR AVO VOS/T VOH -40C TA +125C VCM = 0 V to 2.7 V -40C TA +125C, VCM = 0.2 V to 2.5 V RL = 10 k, VO = 0.1 V to 2.6 V -40C TA +125C -40C TA +125C RL = 100 k to ground -40C TA +125C, RL = 100 k to ground RL = 10 k to ground -40C TA +125C, RL = 10 k to ground RL = 100 k to V+ -40C TA +125C, RL = 100 k to V+ RL = 10 k to V+ -40C TA +125C, RL = 10 k to V+ IOS -40C TA +125C 0 0.2 110 100 110 105 15 35 0.7 20 Conditions Min Typ 5 Max 16 30 25 125 1.0 50 300 2.7 2.5 Unit V V pA pA nA pA pA V dB dB dB dB V/C V V V V mV mV mV mV mA dB dB A A V/s s ms kHz Degrees V p-p nV/Hz
130 125 130 125 0.03 2.693 2.68 5 6 14 20 8
0.1
2.68 2.68 2.67 2.66
Output Voltage Low
VOL
7 8 20 25
Short-Circuit Limit POWER SUPPLY Power Supply Rejection Ratio Supply Current/Amplifier DYNAMIC PERFORMANCE Slew Rate Settling Time 0.01% Overload Recovery Time Gain Bandwidth Product Phase Margin NOISE PERFORMANCE Voltage Noise Voltage Noise Density
ISC PSRR ISY VS = 2.7 V to 5.5 V -40C TA +125C IO = 0 -40C TA +125C RL = 10 k G = 1, 1 V step, CL = 20 pF, RL = 105 100
125 125 210 225 0.35 8 0.05 430 65 2.0 55
SR tS GBP OM en p-p en
RL = 10 k, RL = 100 k, CL = 20 pF f = 0.1 Hz to 10 Hz f = 1 kHz
Rev. A | Page 6 of 24
AD8538/AD8539 ABSOLUTE MAXIMUM RATINGS
TA = 25C, unless otherwise noted. Table 5.
Parameter Supply Voltage Input Voltage Differential Input Voltage Output Short-Circuit Duration to GND Storage Temperature Range Lead Temperature (Soldering, 60 sec) Operating Temperature Range Junction Temperature Range Rating +6 V VSS - 0.3 V to VDD + 0.3 V 6 V Observe derating curve -65C to +150C 300C -40C to +125C -65C to +150C
THERMAL RESISTANCE
JA is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages. Table 6. Thermal Characteristics
Package Type 5-Lead TSOT-23 (UJ-5) 8-Lead SOIC_N (R-8) 8-Lead MSOP (RM-8) JA 207 125 145 JC 61 43 45 Unit C/W C/W C/W
ESD CAUTION
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. Absolute maximum ratings apply at 25C, unless otherwise noted.
Rev. A | Page 7 of 24
AD8538/AD8539 TYPICAL PERFORMANCE CHARACTERISTICS
AD8538 CHARACTERISTICS
AD8538 only, VSY = 5 V or 2.5 V, unless otherwise noted.
450 400 350 300 250 200 150 100
06741-003
VSY = 5V 0V < VCM < 5V TA = 25C
INPUT BIAS CURRENT (pA)
700 600 500 400 300 200 100 0 25
VSY = 5V AND 2.7V
NUMBER OF AMPLIFIERS
0 -10.0 -8.4 -6.8 -5.2 -3.6 -2.0 -0.4 1.2 2.8 4.4 6.0 7.6 9.2 INPUT OFFSET VOLTAGE (V)
45
65
85
105
125
TEMPERATURE (C)
Figure 5. AD8538 Input Offset Voltage Distribution
14 12
NUMBER OF AMPLIFIERS SUPPLY CURRENT (A)
160
Figure 8. AD8538 Input Bias Current vs. Temperature
VSY = 5V -40C < TA < +125C
TA = 25C 140 120 100 80 60 40
06741-007
10 8 6 4 2 0
06741-004
20 0
0
0.012 0.024 0.036 0.048
0.060 0.072 0.084 0.096
0
1
2
3
4
5
TCVOS (V/C)
SUPPLY VOLTAGE (V)
Figure 6. AD8538 Input Offset Voltage Drift Distribution
10 8
INPUT OFFSET VOLTAGE (V)
200
Figure 9. AD8538 Supply Current vs. Supply Voltage
VSY = 5V TA = 25C
6 4 2 0 -2 -4 -6
06741-005
SUPPLY CURRENT (A)
150
VSY = 5V VSY = 2.7V
100
50
06741-008
-8 -10 0 1 2 3 4 5
0 -40
10
60 TEMPERATURE (C)
110
INPUT COMMON-MODE VOLTAGE (V)
Figure 7. AD8538 Input Offset Voltage vs. Input Common-Mode Voltage
Figure 10. AD8538 Supply Current vs. Temperature
Rev. A | Page 8 of 24
06741-006
50
AD8538/AD8539
10000 VSY = 5V TA = 25C
70 60 50 135
OUTPUT SATURATION VOLTAGE (mV)
1000
OPEN-LOOP GAIN (dB)
VSY - VOH 100 VOL 10 SOURCE
40 30 20 M 10 0
90
45
1 SINK
06741-009
0 VSY = 2.5V AND 1.35V RL = 100k CL = 20pF 10k 100k
0.1
-10 -20 1k
0.01
0.1 LOAD CURRENT (mA)
1
10
FREQUENCY (Hz)
Figure 11. AD8538 Output Saturation Voltage vs. Load Current
35
Figure 14. AD8538 Open-Loop Gain and Phase vs. Frequency
120
VSY = 5V RL = 10k VSY - VOH
VSY = 5V AND 2.7V TA = 25C
OUTPUT SATURATION VOLTAGE (mV)
30 25 20 VOL 15 10 5 0 -40
100
80
CMRR (dB)
60
40
20
06741-010 06741-013
-25
-10
5
20
35
50
65
80
95
110
125
0 100
1k
10k FREQUENCY (Hz)
100k
1M
TEMPERATURE (C)
Figure 12. AD8538 Output Saturation Voltage vs. Temperature
60
Figure 15. AD8538 CMRR vs. Frequency
100 VSY = 2.5V AND 1.35V TA = 25C
VSY = 5V AND 2.7V CL = 20pF RL = 2k AV = 100
80 +PSRR
CLOSED-LOOP GAIN (dB)
40
20
AV = 10
PSRR (dB)
60 -PSRR 40
0
AV = 1
20
06741-011 06741-014
-20 1k
10k
100k
1M
0 100
1k
10k FREQUENCY (Hz)
100k
1M
FREQUENCY (Hz)
Figure 13. AD8538 Closed-Loop Gain vs. Frequency
Figure 16. AD8538 PSRR vs. Frequency
Rev. A | Page 9 of 24
06741-012
0.01 0.001
-45 1M
OPEN-LOOP PHASE SHIFT (Degrees)
AD8538/AD8539
1000 VSY = 5V AND 2.7V AV = 100 VOLTAGE (1V/DIV)
VSY = 5V AV = 1 CL = 300pF RL = 10k
100
OUTPUT IMPEDANCE ()
10
AV = 10
1
AV = 1
0.1
06741-022
0.01 100
1k
10k FREQUENCY (Hz)
100k
1M
TIME (4s/DIV)
Figure 17. AD8538 Closed-Loop Output Impedance vs. Frequency
60
Figure 20. AD8538 Large Signal Transient Response
VSY = 5V AV = -50
SMALL SIGNAL OVERSHOOT (%)
50
40
VIN (mV)
VSY = 5V TA = 25C RL = 2k
100
0
30
OS+
0
06741-015
-2.5 TIME (10s/DIV)
0
1
10
100
1000
LOAD CAPACITANCE (pF)
Figure 18. AD8538 Small Signal Overshoot vs. Load Capacitance
VSY = 5V AND 2.7V AV = 1 CL = 300pF RL = 2k
Figure 21. AD8538 Positive Overload Recovery
VSY = 5V AV = -50
0 VIN (mV)
VOLTAGE (50mV/DIV)
-100
2.5 VOUT (V)
06741-016
TIME (4s/DIV)
TIME (10s/DIV)
Figure 19. AD8538 Small Signal Transient Response
Figure 22. AD8538 Negative Overload Recovery
Rev. A | Page 10 of 24
06741-019
0
06741-018
10
OS-
VOUT (V)
20
06741-017
AD8538/AD8539
1000 VSY = 5V TA = 25C VIN
VOLTAGE NOISE DENSITY (nV/Hz)
VOLTAGE (1V/DIV)
VOUT
100
10 10
100
1k FREQUENCY (Hz)
10k
06741-021
TIME (200s/DIV)
Figure 23. AD8538 Voltage Noise Density
VSY = 5V AND 2.7V
Figure 25. AD8538 No Phase Reversal
VOLTAGE (500nV/DIV)
TIME (1s/DIV)
Figure 24. AD8538 0.1 Hz to 10 Hz Input Voltage Noise
06741-020
Rev. A | Page 11 of 24
06741-023
VSY = 5V AV = 1 VIN = 6V p-p RL = 10k
AD8538/AD8539
VSY = 2.7 V or 1.35 V, AD8538 only, unless otherwise noted.
180 160 140 VSY = 2.7V 0V < VCM < 2.7V TA = 25C
10000
OUTPUT SATURATION VOLTAGE (mV)
VSY = 2.7V TA = 25C
1000
NUMBER OF AMPLIFIERS
120 100 80 60 40
06741-024
100
10 SOURCE 1 SINK
06741-027
20 0 -10.0 -8.4 -6.8 -5.2 -3.6 -2.0 -0.4 1.2 2.8 4.4 6.0 7.6 9.2 INPUT OFFSET VOLTAGE (V)
0.1 0.001
0.01
0.1
1
LOAD CURRENT (mA)
Figure 26. AD8538 Input Offset Voltage Distribution
35 30
Figure 29. AD8538 Output Saturation Voltage vs. Load Current
30 VSY = 2.7V RL = 10k
OUTPUT SATURATION VOLTAGE (mV)
VSY = 2.7V -40C < TA < +125C
25 VSY = VOH 20
NUMBER OF AMPLIFIERS
25 20 15 10 5 0
15 VOL 10
5
06741-028
06741-025
0
0.012 0.024 0.036 0.048 0.060 0.072 0.084 0.096 TCVOS (V/C)
0 -40
-25
-10
5
20
35
50
65
80
95
110
125
TEMPERATURE (C)
Figure 27. AD8538 Input Offset Voltage Drift Distribution
10 VSY = 2.7V 8 TA = 25C 6 4 2 0 -2 -4 -6 -8 -10 0 0.5 1.0 1.5 2.0 2.5
06741-026
Figure 30. AD8538 Output Saturation Voltage vs. Temperature
80 VSY = 2.7V TA = 25C 70 RL = 2k 60 50 40 30 20 10 0 OS+ OS- 1 10 100
06741-029
SMALL SIGNAL OVERSHOOT (%)
INPUT OFFSET VOLTAGE (V)
1000
INPUT COMMON-MODE VOLTAGE (V)
LOAD CAPACITANCE (pF)
Figure 28. AD8538 Input Offset Voltage vs. Input Common-Mode Voltage
Figure 31. AD8538 Small Signal Overshoot vs. Load Capacitance
Rev. A | Page 12 of 24
AD8538/AD8539
VSY = 2.7V AV = 1 CL = 100pF RL = 10k 1000 VSY = 2.7V TA = 25C
VOLTAGE NOISE DENSITY (nV/Hz)
06741-030
VOLTAGE (500mV/DIV)
100
TIME (4s/DIV)
10 10
100
1k FREQUENCY (Hz)
10k
100k
Figure 32. AD8538 Large Signal Transient Response
Figure 33. AD8538 Voltage Noise Density
Rev. A | Page 13 of 24
06741-032
AD8538/AD8539
AD8539 CHARACTERISTICS
AD8539 only, VS = 5 V or 2.5 V, unless otherwise noted.
800 700
NUMBER OF AMPLIFIERS
500 400 300 200 100 0 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 VOS (V)
INPUT BIAS CURRENT (pA)
600
AD8539 VSY = 5V 0 < VCM < 5V TA = 25C
1000.0 AD8539 VSY = 5V 100.0
10.0
1.0
0.1
5
25
45 65 85 TEMPERATURE (C)
105
125
Figure 34. AD8539 Input Offset Voltage Distribution
60 AD8539 VSY = 2.5V -40C < VCM < 125C 400 350 300 40 ISY (A) 250 200 150 100 10 50
06741-036
Figure 37. AD8539 Input Bias Current vs. Temperature
50
AD8539 VSY = 0V TO 5V -40C < TA < +125C
+125C +85C +25C -40C
NUMBER OF AMPLIFIERS
30
20
0
0.016
0.032
0.048 0.064 TCVOS (V)
0.080
0.096
0
0.5
1.0
1.5
2.0 2.5 VSY (V)
3.0
3.5
4.0
4.5
5.0
Figure 35. AD8539 Input Offset Voltage Drift Distribution
20 AD8539 VSY = 5V 0V < VCM < 5V TA = 25C
Figure 38. AD8539 Supply Current vs. Supply Voltage
400 AD8539 375 350 325
10
VOS (V)
0
ISY (A)
VSY = 2.5V 300 275
VSY = 1.35V
-10
250 225
06741-037
06741-040
-20
0
1
2 VCM (V)
3
4
5
200 -40
-25
-10
5
20 35 50 65 TEMPERATURE (C)
80
95
110
125
Figure 36. AD8539 Input Offset Voltage vs. Input Common-Mode Voltage
Figure 39. AD8539 Supply Current vs. Temperature
Rev. A | Page 14 of 24
06741-039
0
0
06741-038
06741-035
0.01
AD8538/AD8539
10000
OUTPUT SATURATION VOLTAGE (mV)
AD8539
120
SOURCE, VS = 2.5V SINK, VS = 1.35V
120 100 80 60
PHASE (Degrees)
06741-046 06741-045 06741-044
100 80 60
GAIN (Degrees)
1000
40 20 0 -20 -40 -60 AD8539 VSY = 2.5V RL = 2k CL = 20pF 10k 100k FREQUENCY (Hz) 1M
40 20 0 -20 -40 -60 -80
100
SOURCE, VS = 1.35V SINK, VS = 2.5V
10
1
-80 -100
0.01 0.1 1 ILOAD (mA) 10 100
06741-041
-100 -120 10M
0.1 0.001
-120 1k
Figure 40. AD8539 Output Saturation Voltage vs. Load Current
35
Figure 43. AD8539 Open-Loop Gain and Phase vs. Frequency
140
OUTPUT SATURATION VOLTAGE (mV)
30 25 20
AD8539 VS = 5V VDD - VOH, IL = 250A, RL = 10k
120 100
CHANNEL B
AD8539 VSY = 2.5V
CHANNEL A
CMRR (dB)
06741-042
80 60 40
VOL, IL = 250A, RL = 10k 15 10 VDD - VOH, IL = 25A, RL = 100k 5 VOL, IL = 25A, RL = 100k 0 -40 -25 -10 5 20 35 50 65 TEMPERATURE (C) 80 95 110 125
20 0 100
1k
10k 100k FREQUENCY (Hz)
1M
10M
Figure 41. AD8539 Output Saturation Voltage vs. Temperature
60 AV = 100 40
CLOSED-LOOP GAIN (dB)
Figure 44. AD8539 CMRR vs. Frequency
120
AD8539 VSY = 2.5V RL = 2k CL = 20pF
100 PSRR- 80 PSRR+ 60 40 20
AD8539 VSY = 2.5V
AV = 10
PSRR (dB)
20 AV = 1 0
-20
0
06741-043
-40 100
1k
10k 100k FREQUENCY (Hz)
1M
10M
-20 100
1k
10k 100k FREQUENCY (Hz)
1M
10M
Figure 42. AD8539 Closed-Loop Gain vs. Frequency
Figure 45. AD8539 PSRR vs. Frequency
Rev. A | Page 15 of 24
AD8538/AD8539
1000 900 800
VOLTAGE (1V/DIV)
AD8539 VSY = 2.5V
700
ZOUT ()
AD8539 VSY = 5V AV = 1 CL = 300pF RL = 10k
600 500 400 300 200 100
06741-047
AV = 100
AV = 10
AV = 1
0.01 100
1k
10k 100k FREQUENCY (Hz)
1M
10M
TIME (4s/DIV)
Figure 46. AD8539 Closed-Loop Output Impedance vs. Frequency
60 AD8539 VSY = 2.5V RL = 2k
INPUT VOLTAGE (50mV/DIV)
0.15 0.10 0.05 0 -0.05 -0.10 -0.15
Figure 49. AD8539 Large Signal Transient Response
5 AD8539 VSY = 2.5V AV = -50 INPUT VOLTAGE 4 3 2 1 0 -1 OUTPUT VOLTAGE -0.20 -2 -3
06741-051
50
06741-050
OVERSHOOT (%)
40
30 OS+ 20 OS- 10
1
10 100 CAPACITANCE (pF)
1k
06741-048
0
-0.25
TIME (20s/DIV)
Figure 47. AD8539 Small Signal Overshoot vs. Load Capacitance
0.05 0
Figure 50. AD8539 Positive Overload Recovery
7.5 6.5 AD8539 VSY = 2.5V AV = -50 5.5 4.5 3.5 2.5 1.5 OUTPUT VOLTAGE -0.30 0.5 -0.5
06741-052
INPUT VOLTAGE (50mV/DIV)
VOLTAGE (50mV/DIV)
-0.05 -0.10 -0.15 -0.20 -0.25
06741-049
TIME (2s/DIV)
-0.35
TIME (20s/DIV)
Figure 48. AD8539 Small Signal Transient Response
Figure 51. AD8539 Negative Overload Recovery
Rev. A | Page 16 of 24
OUTPUT VOLTAGE (5V/DIV)
AD8539 VSY = 5V AV = 1 CL = 300pF RL = 2k
INPUT VOLTAGE
OUTPUT VOLTAGE (1V/DIV)
AD8538/AD8539
1k AD8539 VSY = 2.5V INPUT VOLTAGE
VOLTAGE (2V/DIV)
VOLTAGE NOISE DENSITY (nV Hz)
AD8539 VSY = 2.5V AV = 1 RL = 10k
100
OUTPUT VOLTAGE
06741-053
10 100
1k
10k FREQUENCY (Hz)
100k
TIME (200s/DIV)
Figure 52. AD8539 Voltage Noise Density
0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6
06741-054
Figure 54. AD8539 No Phase Reversal
0
AD8539 VSY = 5V AV = 1M
-20
AD8539 VSY = 2.5V
CHANNEL SEPARATION (dB)
VOLTAGE (200mV/DIV)
-40 -60 -80 -100 -120 -140
06741-056
-0.8 -5
-4
-3
-2
-1 0 1 TIME (1s/DIV)
2
3
4
5
-160 100
1k
10k FREQUENCY (Hz)
100k
Figure 53. AD8539 0.1 Hz to 10 Hz Input Voltage Noise
Figure 55. AD8539 Channel Separation vs. Frequency
Rev. A | Page 17 of 24
06741-055
AD8538/AD8539
VS = 2.7 V or 1.35 V, TA = 25C, AD8539 only, unless otherwise noted.
350 300 AD8539 VSY = 2.7V 0V < VCM < 2.7V TA = 25C
35
OUTPUT SATURATION VOLTAGE (mV)
30 25 VDD - VOH, RL = 10k 20 15 10 VDD - VOH, RL = 100k 5 VOL, RL = 10k
AD8539 VSY = 2.7V
NUMBER OF AMPLIFIERS
250 200 150 100 50 0 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 VOS
VOL, RL = 100k -25 -10 5 20 35 50 65 80 TEMPERATURE (C) 95 110 125
06741-060
Figure 56. AD8539 Input Offset Voltage Distribution
45 40 35 AD8539 VSY = 1.35V -40C < TA < +125C
06741-057
0 -40
Figure 59. AD8539 Output Saturation Voltage vs. Temperature
80 70 60 AD8539 VSY = 1.35V RL = 2k
NUMBER OF AMPLIFIERS
OVERSHOOT (%)
30 25 20 15 10 5
06741-058
50 40 OS+ 30 20 OS- 10
06741-061
0 0 0.016 0.032 0.048 0.064 TCVOS (V) 0.080 0.096
0
1
10 100 CAPACITANCE (pF)
1k
Figure 57. AD8539 Input Offset Voltage Drift Distribution
20 15 10 5
VOS (V)
Figure 60. AD8539 Small Signal Overshoot vs. Load Capacitance
AD8539 VSY = 1.35V AV = 1 CL = 300pF RL = 10k
0 -5
-10 -15
06741-059
VOLTAGE (500mV/DIV)
AD8539 VSY = 2.7V 0V < VCM < 2.7V TA = 25C
-20
0
0.3
0.6
0.9
1.2 1.5 VCM (V)
1.8
2.1
2.4
2.7
TIME (4s/DIV)
Figure 58. AD8539 Input Offset Voltage vs. Input Common-Mode Voltage
Figure 61. AD8539 Large Signal Transient Response
Rev. A | Page 18 of 24
06741-062
AD8538/AD8539
1k AD8539 VSY = 1.35V 0 -20 AD8539 VSY = 1.35V
VOLTAGE NOISE DENSITY (nV/ Hz)
CHANNEL SEPARATION (dB)
06741-063
-40 -60 -80 -100 -120 -140
06741-064
100
10 100
1k
10k FREQUENCY (Hz)
100k
-160 100
1k
10k FREQUENCY (Hz)
100k
Figure 62. AD8539 Voltage Noise Density
Figure 63. AD8539 Channel Separation vs. Frequency
Rev. A | Page 19 of 24
AD8538/AD8539 OUTLINE DIMENSIONS
2.90 BSC
5
4
1.60 BSC
1 2 3
2.80 BSC
PIN 1 0.95 BSC *0.90 0.87 0.84 1.90 BSC
*1.00 MAX
0.20 0.08 8 4 0 0.60 0.45 0.30
0.10 MAX
0.50 0.30
SEATING PLANE
*COMPLIANT TO JEDEC STANDARDS MO-193-AB WITH THE EXCEPTION OF PACKAGE HEIGHT AND THICKNESS.
Figure 64. 5-Lead Thin Small Outline Transistor Package [TSOT-23] (UJ-5) Dimensions shown in millimeters
5.00 (0.1968) 4.80 (0.1890)
4.00 (0.1574) 3.80 (0.1497)
8 1
5 4
6.20 (0.2441) 5.80 (0.2284)
1.27 (0.0500) BSC 0.25 (0.0098) 0.10 (0.0040) COPLANARITY 0.10 SEATING PLANE
1.75 (0.0688) 1.35 (0.0532)
0.50 (0.0196) 0.25 (0.0099) 8 0 0.25 (0.0098) 0.17 (0.0067) 1.27 (0.0500) 0.40 (0.0157)
45
0.51 (0.0201) 0.31 (0.0122)
COMPLIANT TO JEDEC STANDARDS MS-012-A A 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 65. 8-Lead Standard Small Outline Package [SOIC_N] Narrow Body (R-8) Dimensions shown in millimeters and (inches)
Rev. A | Page 20 of 24
012407-A
AD8538/AD8539
3.20 3.00 2.80
3.20 3.00 2.80 PIN 1
8
5
1
5.15 4.90 4.65
4
0.65 BSC 0.95 0.85 0.75 0.15 0.00 0.38 0.22 SEATING PLANE 1.10 MAX 8 0 0.80 0.60 0.40
0.23 0.08
COPLANARITY 0.10
COMPLIANT TO JEDEC STANDARDS MO-187-AA
Figure 66. 8-Lead Mini Small Outline Package [MSOP] (RM-8) Dimensions shown in millimeters
ORDERING GUIDE
Model AD8538AUJZ-R2 1 AD8538AUJZ-REEL1 AD8538AUJZ-REEL71 AD8538ARZ1 AD8538ARZ-REEL1 AD8538ARZ-REEL71 AD8539ARMZ-R21 AD8539ARMZ-REEL1 AD8539ARZ1 AD8539ARZ-REEL1 AD8539ARZ-REEL71
1
Temperature Range -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C
Package Description 5-Lead TSOT-23 5-Lead TSOT-23 5-Lead TSOT-23 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
Package Option UJ-5 UJ-5 UJ-5 R-8 R-8 R-8 RM-8 RM-8 R-8 R-8 R-8
Branding A0C A0C A0C
A1S A1S
Z = RoHS Compliant Part.
Rev. A | Page 21 of 24
AD8538/AD8539 NOTES
Rev. A | Page 22 of 24
AD8538/AD8539 NOTES
Rev. A | Page 23 of 24
AD8538/AD8539 NOTES
(c)2005-2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06741-0-5/07(A)
Rev. A | Page 24 of 24

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