Datasheet AD8539 Datasheet (ANALOG DEVICES)

Low Power, Precision, Auto-Zero Op Amps
AD8538/AD8539

FEATURES

Low offset voltage: 13 μV maximum Input offset drift: 0.03 μV/°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 μA

APPLICATIONS

Mobile communications Portable instrumentation Battery-powered devices Sensor interfaces Temperature measurement

PIN CONFIGURATIONS

OUT
1
AD8538
V–
2
TOP VIEW
(Not to Scale)
+IN
3
Figure 1. 5-Lead TSOT-23 (UJ-5)
NC
1
AD8538
IN
2
3
+IN
TOP VIEW
(Not to Scale)
4
V
NC = NO CONNECT
Figure 2. 8-Lead SOIC_N (R-8)
V+
5
–IN
4
06741-002
NC
8
V+
7
6
OUT
5
NC
06741-001
Electronic scales

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 μA maximujm per amplifier at 5.0 V. Operation is fully specified from 2.7 V to
1
OUT A
–IN A
+IN A
V–
AD8539
2
3
TOP VIEW
(Not to Scale)
4
Figure 3. 8-Lead SOIC_N (R-8)
8
7
6
5
V+
OUT B
–IN B
+IN B
06741-033
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 (−40°C to +125°C). The AD8538 amplifier is
1
OUT A
–IN A
+IN A
V–
AD8539
2
TOP VIEW
3
(Not to Scale)
4
Figure 4. 8-Lead MSOP (RM-8)
8
7
6
5
V+
OUT B
–IN B
+IN B
06741-034
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.
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her 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 ©2005–2007 Analog Devices, Inc. All rights reserved.
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

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
Absolute Maximum Ratings ............................................................7
Thermal Resistance .......................................................................7
ESD Caution...................................................................................7
Typical Perf or m an c e Charac t e r istics ..............................................8
AD8538 Characteristics................................................................8
AD8539 Characteristics............................................................. 14
Outline Dimensions ....................................................................... 20
Ordering Guide .......................................................................... 21
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 = 25°C, unless otherwise specified.
Table 1.
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage V
OS
−40°C TA ≤ +125°C 30 µV Input Bias Current I
B
−40°C TA ≤ +85°C 35 100 pA
−40°C TA ≤ +125°C 0.7 1.0 nA Input Offset Current I
OS
−40°C TA ≤ +125°C 150 pA Input Voltage Range 0 5 V Common-Mode Rejection Ratio CMRR VCM = 0 V to 5 V 115 150 dB
−40°C TA ≤ +125°C, VCM = 0.2 V to 4.8 V 100 135 dB Large Signal Voltage Gain A
VO
−40°C TA ≤ +125°C 110 135 dB Offset Voltage Drift
ΔV
OS
OUTPUT CHARACTERISTICS
Output Voltage High V
OH
−40°C TA ≤ +125°C, RL = 100 kΩ to ground 4.98 V R
−40°C TA ≤ +125°C, RL = 10 kΩ to ground 4.94 V Output Voltage Low V
OL
−40°C TA ≤ +125°C, RL = 100 kΩ to V+ 2.8 7 mV R
−40°C TA ≤ +125°C, RL = 10 kΩ to V+ 20 30 mV Short-Circuit Limit I
SC
POWER SUPPLY
Power Supply Rejection Ratio PSRR VS = 2.7 V to 5.0 V 105 125 dB
−40°C TA ≤ +125°C 100 125 dB Supply Current/Amplifier I
SY
−40°C TA ≤ +125°C 190 215 µA DYNAMIC PERFORMANCE
Slew Rate SR RL =10 kΩ 0.4 V/µs Settling Time 0.01% t
S
Overload Recovery Time 0.05 ms Gain Bandwidth Product GBP 430 kHz Phase Margin Ø
M
NOISE PERFORMANCE
Voltage Noise e Voltage Noise Density e
n p-p
n
5 13 µV
15 25 pA
20 50 pA
RL = 10 kΩ, VO = 0.1 V to 4.9 V 115 141 dB
/ΔT
−40°C ≤ T
≤ +125°C 0.03 0.1 µV/°C
A
RL = 100 kΩ to ground 4.99 4.998 V
= 10 kΩ to ground 4.95 4.970 V
L
RL = 100 kΩ to V+ 1.9 5 mV
= 10 kΩ to V+ 17 20 mV
L
±25 mA
IO = 0 150 180 µA
G = ±1, 2 V step, CL = 20 pF, RL = 1 kΩ 10 s
RL = 10 kΩ, RL = 100 kΩ, CL = 20 pF 65 Degrees
f = 0.1 Hz to 10 Hz 2.0 µV p-p f = 1 kHz 50
nV/Hz
Rev. A | Page 3 of 24
AD8538/AD8539
@ VS = 2.7 V, VCM = 1.35 V, VO = 1.35 V, TA = 25°C, unless otherwise specified.
Table 2.
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage V
OS
−40°C TA ≤ +125°C 30 µV Input Bias Current I
B
−40°C TA ≤ +85°C 35 100 pA
−40°C TA ≤ +125°C 0.7 1.0 nA Input Offset Current I
OS
−40°C TA ≤ +125°C 150 pA Input Voltage Range 0 2.7 V Common-Mode Rejection Ratio CMRR VCM = 0 V to 2.5 V 110 140 dB
−40°C TA ≤ +125°C 100 135 dB Large Signal Voltage Gain A
VO
−40°C TA ≤ +125°C 105 135 dB Offset Voltage Drift
ΔV
OS
OUTPUT CHARACTERISTICS
Output Voltage High V
OH
−40°C TA ≤ +125°C, RL = 100 kΩ to ground 2.68 V R
−40°C TA ≤ +125°C, RL = 10 kΩ to ground 2.66 V Output Voltage Low V
OL
−40°C TA ≤ +125°C, RL = 100 kΩ to V+ 2.4 5 mV R
−40°C TA ≤ +125°C, RL = 10 kΩ to V+ 20 25 mV Short-Circuit Limit I
SC
POWER SUPPLY
Power Supply Rejection Ratio PSRR VS = 2.7 V to 5.5 V 105 125 dB
−40°C TA ≤ +125°C 100 125 dB Supply Current/Amplifier I
SY
−40°C TA ≤ +125°C 190 215 µA DYNAMIC PERFORMANCE
Slew Rate SR RL = 10 kΩ 0.35 V/µs Settling Time 0.01% t
S
Overload Recovery Time 0.05 ms Gain Bandwidth Product GBP 430 kHz Phase Margin Ø
M
NOISE PERFORMANCE
Voltage Noise e Voltage Noise Density e
n p-p
n
5 13 µV
15 25 pA
20 50 pA
RL = 10 kΩ, VO = 0.1 V to 1.7 V 110 140 dB
/ΔT
−40°C ≤ T
≤ +125°C 0.03 0.1 µV/°C
A
RL = 100 kΩ to ground 2.68 2.698 V
= 10 kΩ to ground 2.67 2.68 V
L
RL = 100 kΩ to V+ 1.7 5 mV
= 10 kΩ to V+ 14 20 mV
L
±8 mA
IO = 0 150 180 µA
G = ±1, 1 V step, CL = 20 pF, RL = 1 kΩ 5 s
RL = 10 kΩ, RL = 100 kΩ, CL = 20 pF 65 Degrees
f = 0.1 Hz to 10 Hz 2.0 µV p-p f = 1 kHz 50
nV/Hz
Rev. A | Page 4 of 24
AD8538/AD8539

AD8539 ELECTRICAL SPECIFICATIONS

@ VS = 5.0 V, VCM = 2.5 V, VO = 2.5 V, TA = 25°C, unless otherwise specified.
Table 3.
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage V
OS
−40°C TA ≤ +125°C 30 µV Input Bias Current I
B
−40°C TA ≤ +85°C 35 125 pA
−40°C TA ≤ +125°C 0.7 1.0 nA Input Offset Current I
OS
−40°C TA ≤ +125°C 400 pA Input Voltage Range 0 5 V
−40°C TA ≤ +125°C 0.2 4.8 V
Common-Mode Rejection Ratio CMRR VCM = 0 V to 5 V 115 135 dB
−40°C TA ≤ +125°C, VCM = 0.2 V to 4.8 V 100 130 dB Large Signal Voltage Gain A
VO
−40°C TA ≤ +125°C 110 125 dB Offset Voltage Drift
ΔV
OS
OUTPUT CHARACTERISTICS
Output Voltage High V
OH
−40°C TA ≤ +125°C, RL = 100 kΩ to ground 4.98 V R
−40°C TA ≤ +125°C, RL = 10 kΩ to ground 4.94 V Output Voltage Low V
OL
−40°C TA ≤ +125°C, RL = 100 kΩ to V+ 6 8 mV R
−40°C TA ≤ +125°C, RL = 10 kΩ to V+ 24 30 mV Short-Circuit Limit I
SC
POWER SUPPLY
Power Supply Rejection Ratio PSRR VS = 2.7 V to 5.0 V 105 125 dB
−40°C TA ≤ +125°C 100 125 dB Supply Current/Amplifier I
SY
−40°C TA ≤ +125°C 225 µA DYNAMIC PERFORMANCE
Slew Rate SR RL =10 kΩ 0.4 V/µs Settling Time 0.01% t
S
Overload Recovery Time 0.05 ms Gain Bandwidth Product GBP 430 kHz Phase Margin Ø
M
NOISE PERFORMANCE
Voltage Noise e Voltage Noise Density e
n p-p
n
5 15 µV
15 60 pA
20 70 pA
RL = 10 kΩ, VO = 0.1 V to 4.9 V 110 130 dB
/ΔT
−40°C ≤ T
≤ +125°C 0.03 0.1 µV/°C
A
RL = 100 kΩ to ground 4.99 4.994 V
= 10 kΩ to ground 4.95 4.97 V
L
RL = 100 kΩ to V+ 5 7 mV
= 10 kΩ to V+ 20 25 mV
L
±25 mA
IO = 0 170 210 µA
G = ±1, 2 V step, CL = 20 pF, RL = 1 kΩ 10 s
RL = 10 kΩ, RL = 100 kΩ, CL = 20 pF 65 Degrees
f = 0.1 Hz to 10 Hz 1.2 µV p-p f = 1 kHz 52
nV/Hz
Rev. A | Page 5 of 24
AD8538/AD8539
@ VS = 2.7 V, VCM = 1.35 V, VO = 1.35 V, TA = 25°C, unless otherwise specified.
Table 4.
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage V
OS
−40°C TA ≤ +125°C 30 µV Input Bias Current I
B
−40°C TA ≤ +85°C 35 125 pA
−40°C TA ≤ +125°C 0.7 1.0 nA Input Offset Current I
OS
−40°C TA ≤ +125°C 300 pA Input Voltage Range 0 2.7 V
−40°C TA ≤ +125°C 0.2 2.5 Common-Mode Rejection Ratio CMRR VCM = 0 V to 2.7 V 110 130 dB
−40°C TA ≤ +125°C, VCM = 0.2 V to 2.5 V 100 125 dB Large Signal Voltage Gain A
VO
−40°C TA ≤ +125°C 105 125 dB Offset Voltage Drift
ΔV
OS
OUTPUT CHARACTERISTICS
Output Voltage High V
OH
−40°C TA ≤ +125°C, RL = 100 kΩ to ground 2.68 V R
−40°C TA ≤ +125°C, RL = 10 kΩ to ground 2.66 V Output Voltage Low V
OL
−40°C TA ≤ +125°C, RL = 100 kΩ to V+ 6 8 mV R
−40°C TA ≤ +125°C, RL = 10 kΩ to V+ 20 25 mV Short-Circuit Limit I
SC
POWER SUPPLY
Power Supply Rejection Ratio PSRR VS = 2.7 V to 5.5 V 105 125 dB
−40°C TA ≤ +125°C 100 125 dB Supply Current/Amplifier I
SY
−40°C TA ≤ +125°C 225 µA DYNAMIC PERFORMANCE
Slew Rate SR RL = 10 kΩ 0.35 V/µs Settling Time 0.01% t
S
Overload Recovery Time 0.05 ms Gain Bandwidth Product GBP 430 kHz Phase Margin Ø
M
NOISE PERFORMANCE
Voltage Noise e Voltage Noise Density e
n p-p
n
5 16 µV
15 25 pA
20 50 pA
RL = 10 kΩ, VO = 0.1 V to 2.6 V 110 130 dB
/ΔT
−40°C ≤ T
≤ +125°C 0.03 0.1 µV/°C
A
RL = 100 kΩ to ground 2.68 2.693 V
= 10 kΩ to ground 2.67 2.68 V
L
RL = 100 kΩ to V+ 5 7 mV
= 10 kΩ to V+ 14 20 mV
L
±8 mA
IO = 0 210 µA
G = ±1, 1 V step, CL = 20 pF, RL = ∞ 8 s
RL = 10 kΩ, RL = 100 kΩ, CL = 20 pF 65 Degrees
f = 0.1 Hz to 10 Hz 2.0 µV p-p f = 1 kHz 55
nV/Hz
Rev. A | Page 6 of 24
AD8538/AD8539

ABSOLUTE MAXIMUM RATINGS

T = 25°C, unless otherwise noted.
A
Table 5.
Parameter Rating
Supply Voltage +6 V Input Voltage V − 0.3 V to V + 0.3 V Differential Input Voltage ±6 V Output Short-Circuit Duration to GND Observe derating curve Storage Temperature Range –65°C to +150°C Lead Temperature (Soldering, 60 sec) 300°C Operating Temperature Range –40°C to +125°C Junction Temperature Range −65°C to +150°C
SS DD
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 25°C, unless otherwise noted.

THERMAL RESISTANCE

θ
is specified for the worst-case conditions, that is, a device
JA
soldered in a circuit board for surface-mount packages.
Table 6. Thermal Characteristics
Package Type θ θ Unit
5-Lead TSOT-23 (UJ-5) 207 61 °C/W 8-Lead SOIC_N (R-8) 125 43 °C/W 8-Lead MSOP (RM-8) 145 45 °C/W
JA JC

ESD CAUTION

Rev. A | Page 7 of 24
AD8538/AD8539

TYPICAL PERFORMANCE CHARACTERISTICS

AD8538 CHARACTERISTICS

AD8538 only, V = 5 V or ±2.5 V, unless otherwise noted.
450
400
350
300
250
200
150
NUMBER OF AMPLIFIERS
100
50
SY
VSY = 5V 0V < V
< 5V
CM
T
= 25°C
A
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 (µV)
06741-003
Figure 5. AD8538 Input Offset Voltage Distribution Figure 8. AD8538 Input Bias Current vs. Temperature
700
VSY = 5V AND 2.7V
600
500
400
300
200
INPUT BIAS CURRENT (pA)
100
0
25 45 65 85 105 125
TEMPERATURE (°C)
06741-006
14
V
= 5V
SY
–40°C < T
12
10
8
6
4
NUMBER OF AMPLIFIERS
2
0
0 0.096
< +125°C
A
0.012 0.024 0.0 36 0.048 0.060 0.072 0.084
TCVOS (µV/°C)
06741-004
Figure 6. AD8538 Input Offset Voltage Drift Distribution
10
VSY = 5V T
= 25°C
8
A
6
4
2
0
–2
–4
INPUT OFFSET VOLTAGE (µV)
–6
–8
–10
05
1234
INPUT COMMON-MODE VOLTAGE (V)
06741-005
Figure 7. AD8538 Input Offset Voltage vs. Input Common-Mode Voltage
160
= 25°C
T
A
140
120
100
80
60
SUPPLY CURRENT (µA)
40
20
0
05
Figure 9. AD8538 Supply Current vs. Supply Voltage
200
150
100
SUPPLY CURRENT (µA)
50
0
–40 10 60 110
Figure 10. AD8538 Supply Current vs. Temperature
1234
SUPPLY VOLTAGE (V)
VSY = 5V
= 2.7V
V
SY
TEMPERATURE (°C)
06741-007
06741-008
Rev. A | Page 8 of 24
AD8538/AD8539
10000
VSY= 5V
= 25°C
T
A
1000
VSY– V
100
10
1
0.1
OUTPUT SATURATION VOLTAGE (mV)
0.01
0.001 1010.10.01
SOURCE
SINK
LOAD CURRENT (mA)
OH
V
OL
06741-009
Figure 11. AD8538 Output Saturation Voltage vs. Load Current Figure 14. AD8538 Open-Loop Gain and Phase vs. Frequency
70
60
50
40
30
20
10
OPEN-LOOP GAIN (dB)
0
VSY = ±2.5V AND ±1.35V
–10
R
= 100k
L
C
= 20pF
L
–20
1k 10k 100k 1M
FREQUENCY (Hz)
ФM
135
90
45
0
OPEN-L OOP PHASE SHIFT (Degrees)
–45
06741-012
35
VSY= 5V
= 10k
R
L
30
25
20
15
10
5
OUTPUT SATURATION VOLTAGE (mV)
0
–40 –25 –10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
VSY– V
OH
V
OL
Figure 12. AD8538 Output Saturation Voltage vs. Temperature
60
40
20
AV = 100
AV = 10
VSY = 5V AND 2.7V
= 20pF
C
L
= 2k
R
L
120
100
80
60
CMRR (dB)
40
20
06741-010
0 100 1M
1k 10k 100k
FREQUENCY ( Hz)
VSY = 5V AND 2.7V T
= 25°C
A
06741-013
Figure 15. AD8538 CMRR vs. Frequency
100
80
60
PSRR (dB)
40
–PSRR
VSY = ±2.5V AND ±1.35V T
= 25°C
A
+PSRR
AV = 1
CLOSED-LOOP GAIN (dB)
0
–20
1k 10k 100k 1M
FREQUENCY ( Hz)
Figure 13. AD8538 Closed-Loop Gain vs. Frequency
06741-011
Rev. A | Page 9 of 24
20
0 100 1M
1k 10k 100k
FREQUENCY ( Hz)
Figure 16. AD8538 PSRR vs. Frequency
06741-014
AD8538/AD8539
1000
VSY = 5V AND 2.7V
100
AV= 100
VSY = 5V
= 1
A
V
= 300pF
C
L
= 10k
R
L
10
1
OUTPUT IMPEDANCE (Ω)
0.1
0.01 100 1k 10k 100k 1M
AV= 10
AV= 1
FREQUENCY ( Hz)
Figure 17. AD8538 Closed-Loop Output Impedance vs. Frequency
60
VSY = 5V T
= 25°C
A
R
= 2k
L
50
40
30
20
SMALL SIGNAL OVERSHOOT (%)
10
0
1 1000
10 100
LOAD CAPACITANCE ( pF)
OS+
OS–
Figure 18. AD8538 Small Signal Overshoot vs. Load Capacitance
VOLTAGE (1V/DIV)
06741-022
TIME (4µs/DIV)
06741-017
Figure 20. AD8538 Large Signal Transient Response
VSY = 5V
=–50
A
V
100
(mV)
IN
0
0
(V) V
OUT
V
06741-015
–2.5
TIME (10µs/DIV)
06741-018
Figure 21. AD8538 Positive Overload Recovery
VSY = 5V AND 2.7V
= 1
A
V
C
= 300pF
L
= 2k
R
L
VOLTAGE (50mV/DIV)
TIME (4µs/DIV)
Figure 19. AD8538 Small Signal Transient Response
06741-016
Rev. A | Page 10 of 24
VSY = 5V A
=–50
V
0
(mV)
IN
–100
2.5
(V) V
OUT
V
0
TIME (10µs/DIV)
Figure 22. AD8538 Negative Overload Recovery
06741-019
AD8538/AD8539
1000
VSY = 5V T
= 25°C
A
100
VOLTAGE NOISE DENSITY (nV/√Hz)
10
10 100 1k 10k
FREQUENCY ( Hz)
Figure 23. AD8538 Voltage Noise Density
V
VOLTAGE (1V/DIV)
VSY = 5V
= 1
A
V
= 6V p-p
V
IN
R
= 10k
06741-021
L
V
IN
OUT
TIME (200µ s/DIV)
Figure 25. AD8538 No Phase Reversal
06741-023
VSY = 5V AND 2.7V
VOLTAGE (500nV/DIV)
TIME (1s/DIV)
06741-020
Figure 24. AD8538 0.1 Hz to 10 Hz Input Voltage Noise
Rev. A | Page 11 of 24
AD8538/AD8539
V = 2.7 V or ±1.35 V, AD8538 only, unless otherwise noted.
SY
180
VSY = 2.7V
< 2.7V
0V < V
160
140
120
100
80
60
NUMBER OF AMPLIFIERS
40
20
CM
= 25°C
T
A
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 (µV)
06741-024
Figure 26. AD8538 Input Offset Voltage Distribution Figure 29. AD8538 Output Saturation Voltage vs. Load Current
10000
VSY = 2.7V T
= 25°C
A
1000
100
10
SOURCE
1
OUTPUT SATURATION VOLT AGE (mV)
0.1
0.001 1
0.01 0.1
SINK
LOAD CURRENT (mA)
06741-027
35
30
25
20
15
10
NUMBER OF AMPLIFIERS
5
0
0 0.012 0.024 0.036 0.048 0.060 0.072 0. 084 0.096
TCVOS (µV/°C)
V
= 2.7V
SY
–40°C < T
< +125°C
A
06741-025
Figure 27. AD8538 Input Offset Voltage Drift Distribution
10
VSY = 2.7V T
= 25°C
A
8
6
4
2
0
–2
–4
INPUT OFFSET VOLTAGE (µV)
–6
–8
–10
02
0.5 1.0 1.5 2.0
INPUT COMMON-MODE VOLTAGE (V)
06741-026
.5
Figure 28. AD8538 Input Offset Voltage vs. Input Common-Mode Voltage
30
VSY = 2.7V R
= 10k
L
25
20
15
10
5
OUTPUT SATURATION VOLTAGE (mV)
0
–40 125
–25–105 203550658095110
VSY = VOH
VOL
TEMPERATURE (°C)
Figure 30. AD8538 Output Saturation Voltage vs. Temperature
80
VSY = 2.7V T
= 25°C
A
70
R
= 2k
L
60
50
40
30
20
SMALL SIGNAL OVERSHOOT (%)
10
0
1 1000
10 100
LOAD CAPACITANCE (p F)
OS+
OS–
Figure 31. AD8538 Small Signal Overshoot vs. Load Capacitance
06741-028
06741-029
Rev. A | Page 12 of 24
AD8538/AD8539
VOLTAGE NOISE DENSITY (nV/√Hz)
1000
100
VSY = 2.7V T
= 25°C
A
VOLTAGE (500mV/DIV)
VSY = 2.7V A
= 1
V
C
= 100pF
L
R
= 10k
L
TIME (4µs/DIV)
Figure 32. AD8538 Large Signal Transient Response
06741-030
10
10 100 1k 10k 100k
FREQUENCY ( Hz)
Figure 33. AD8538 Voltage Noise Density
06741-032
Rev. A | Page 13 of 24
AD8538/AD8539

AD8539 CHARACTERISTICS

AD8539 only, VS = 5 V or ±2.5 V, unless otherwise noted.
800
700
600
AD8539 V
= 5V
SY
0 < V T
= 25°C
A
< 5V
CM
1000.0
100.0
AD8539 V
= 5V
SY
500
400
300
NUMBER OF AMPLI FIERS
200
100
0 –10 –9 –8 –7 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 6 7 8 9 10
V
(µV)
OS
Figure 34. AD8539 Input Offset Voltage Distribution
60
50
40
30
20
NUMBER OF AMPLIFIERS
10
0
0 0.016 0. 032 0.048 0. 064 0. 080 0.096
TCV
OS
(µV)
AD8539 V
= ±2.5V
SY
–40°C < V
< 125°C
CM
06741-035
06741-036
10.0
1.0
INPUT BIAS CURRENT (pA)
0.1
0.01 5 25 45 65 85 105 125
TEMPERATURE ( °C)
Figure 37. AD8539 Input Bias Current vs. Temperature
400
AD8539 V
= 0V TO 5V
SY
350
–40°C < T
300
250
200
(µA)
SY
I
150
100
50
0
0 0. 5 1.0 1.5 2. 0 2.5 3.0 3.5 4.0 4. 5 5.0
< +125°C
A
V
(V)
SY
+125°C
+85°C
+25°C
–40°C
Figure 35. AD8539 Input Offset Voltage Drift Distribution Figure 38. AD8539 Supply Current vs. Supply Voltage
06741-038
06741-039
20
10
(µV)
0
OS
V
–10
–20
012345
V
(V)
CM
AD8539 V
= 5V
SY
0V < V T
= 25°C
A
< 5V
CM
06741-037
Figure 36. AD8539 Input Offset Voltage vs. Input Common-Mode Voltage
Rev. A | Page 14 of 24
400
375
350
325
300
(µA)
SY
I
275
250
225
200
–40 –25 –10 5 20 35 50 65 80 95 110 125
VSY = ±2.5V
VSY = ±1.35V
TEMPERATURE (°C)
AD8539
Figure 39. AD8539 Supply Current vs. Temperature
06741-040
AD8538/AD8539
10000
AD8539
1000
100
SOURCE, VS = ± 1.35V
10
1
OUTPUT SATURATION VOLTAGE (mV)
0.1
0.001 0.01 0. 1 1 10 100
SOURCE, VS = ± 2.5V
SINK, VS = ± 1.35V
I
(mA)
LOAD
SINK, VS = ± 2.5V
Figure 40. AD8539 Output Saturation Voltage vs. Load Current
120
100
80
60
40
20
0
–20
GAIN (Degrees)
–40
–60
AD8539 V
= ±2.5V
–80
SY
R
= 2k
L
–100
C
= 20pF
L
–120
06741-041
1k 10k 100k 1M 10M
FREQUENCY (Hz)
Figure 43. AD8539 Open-Loop Gain and Phase vs. Frequency
120
100
80
60
40
20
0
–20
–40
–60
–80
–100
–120
PHASE (Degrees)
06741-044
35
AD8539 V
= 5V
S
30
25
20
15
10
5
OUTPUT SATURATION VOLTAGE (mV)
0
–40 –25 –10 5 20 35 50 65 80 95 110 125
VDD - VOH, IL = 250µA, RL = 10k
VOL, IL = 250µA, RL = 10k
VDD - VOH, IL = 25µA, RL = 100k
VOL, IL = 25µA, RL = 100k
TEMPERATURE ( °C)
Figure 41. AD8539 Output Saturation Voltage vs. Temperature
60
AV = 100
40
AV = 10
20
AV = 1
0
CLOSED-LOOP GAIN (dB)
–20
AD8539 V
= ±2.5V
SY
R
= 2k
L
C
= 20pF
L
140
120
100
80
60
CMRR (dB)
40
20
0
06741-042
100 1k 10k 100k 1M 10M
CHANNEL B
CHANNEL A
FREQUENCY (Hz)
AD8539 V
= ±2.5V
SY
06741-045
Figure 44. AD8539 CMRR vs. Frequency
PSRR (dB)
120
100
80
60
40
20
0
PSRR–
PSRR+
AD8539 V
= ±2.5V
SY
–40
100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
Figure 42. AD8539 Closed-Loop Gain vs. Frequency
06741-043
Rev. A | Page 15 of 24
–20
100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
Figure 45. AD8539 PSRR vs. Frequency
06741-046
AD8538/AD8539
1000
AD8539
900
V
= ±2.5V
SY
800
700
600
(Ω)
500
OUT
Z
400
300
200
100
0.01 100 1k 10k 100k 1M 10M
Figure 46. AD8539 Closed-Loop Output Impedance vs. Frequency
AV = 100
AV = 10
FREQUENCY (Hz)
AV = 1
AD8539 V
= 5V
SY
A
= 1
V
C
= 300pF
L
R
= 10k
L
VOLTAGE (1V/DIV )
TIME (4µs/DIV)
06741-047
06741-050
Figure 49. AD8539 Large Signal Transient Response
60
AD8539 V
= ±2.5V
SY
R
= 2k
50
L
40
30
OVERSHOOT (%)
20
10
0
1 10 100 1k
CAPACITANCE (pF )
OS+
OS–
Figure 47. AD8539 Small Signal Overshoot vs. Load Capacitance
AD8539 V
= 5V
SY
A
= 1
V
C
= 300pF
L
R
= 2k
L
VOLTAGE (50mV/DIV)
0.15
0.10
0.05
0
–0.05
–0.10
–0.15
INPUT VOLTAGE (50mV/DIV)
–0.20
–0.25
06741-048
INPUT VOLTAGE
OUTPUT VO LTAGE
TIME (20µs/DIV)
AD8539 V
= ±2.5V
SY
A
= –50
V
5
4
3
2
1
0
–1
OUTPUT VOLTAGE (1V/DIV)
–2
–3
06741-051
Figure 50. AD8539 Positive Overload Recovery
INPUT VOLTAGE (50mV/DIV)
0.05
–0.05
–0.10
–0.15
–0.20
–0.25
–0.30
0
INPUT VOLTAG E
OUTPUT VO LTAGE
AD8539 V
= ±2.5V
SY
A
= –50
V
7.5
6.5
5.5
4.5
3.5
2.5
1.5
0.5
OUTPUT VOLTAGE (5V/DIV)
TIME (2µs/DIV)
Figure 48. AD8539 Small Signal Transient Response
06741-049
Rev. A | Page 16 of 24
–0.35
TIME (20µs/DIV)
Figure 51. AD8539 Negative Overload Recovery
–0.5
06741-052
AD8538/AD8539
1k
AD8539 V
= ±2.5V
SY
INPUT VOLTAGE
AD8539 V
= ±2.5V
SY
A
= 1
V
R
= 10k
L
100
VOLTAGE NOI SE DENSITY (nV Hz)
10
100 1k 10k 100k
FREQUENCY (Hz)
Figure 52. AD8539 Voltage Noise Density
0.8 AD8539
= 5V
V
SY
0.6 A
= 1M
V
0.4
0.2
0
–0.2
VOLTAG E (200mV/DI V)
–0.4
–0.6
–0.8
–5 –4 –3 –2 –1 0 1 2 3 4 5
TIME (1s/DIV)
Figure 53. AD8539 0.1 Hz to 10 Hz Input Voltage Noise
OUTPUT
VOLTAGE
VOLTAGE (2V/ DIV)
TIME (200µs/DIV)
06741-053
06741-055
Figure 54. AD8539 No Phase Reversal
0
AD8539 V
= ±2.5V
SY
–20
–40
–60
–80
–100
–120
CHANNEL SEPARATIO N (dB)
–140
–160
06741-054
100 1k 10k 100k
FREQUENCY (Hz)
06741-056
Figure 55. AD8539 Channel Separation vs. Frequency
Rev. A | Page 17 of 24
AD8538/AD8539
V = 2.7 V or ±1.35 V, T = 25°C, AD8539 only, unless otherwise noted.
S A
350
300
250
200
150
AD8539
= 2.7V
V
SY
0V < V
= 25°C
T
A
CM
< 2.7V
35
30
25
20
15
VDD – VOH, RL = 10k
VOL, RL = 10k
AD8539
= 2.7V
V
SY
100
NUMBER OF AMPLIFIERS
50
0
–10 –9 –8 –7 –6 –5 –4 –3 –2 –1 0 1 2 3 4 5 6 7 8 9 10
V
OS
Figure 56. AD8539 Input Offset Voltage Distribution
45
40
35
30
25
20
15
NUMBER OF AMPLIFIERS
10
5
0
0 0.016 0. 032 0.048 0. 064 0. 080 0.096
TCV
OS
(µV)
AD8539
= ±1.35V
V
SY
–40°C < T
< +125°C
A
Figure 57. AD8539 Input Offset Voltage Drift Distribution
20
15
10
5
(µV)
0
OS
V
–5
–10
AD8539 V
= 2.7V
SY
0V < V T
= 25°C
A
CM
< 2.7V
10
5
OUTPUT SATURATION VOLTAGE (mV)
0
06741-057
–40 –25 –10 5 20 35 50 65 80 95 110 125
VDD – VOH, RL = 100k
VOL, RL = 100k
TEMPERATURE ( °C)
06741-060
Figure 59. AD8539 Output Saturation Voltage vs. Temperature
80
AD8539
= ±1.35V
V
SY
70
= 2k
R
L
60
50
40
30
OVERSHOOT (%)
20
10
0
06741-058
1 10 100 1k
CAPACITANCE (pF )
OS+
OS–
06741-061
Figure 60. AD8539 Small Signal Overshoot vs. Load Capacitance
AD8539
= ±1.35V
V
SY
= 1
A
V
= 300pF
C
L
= 10k
R
L
VOLTAGE (500mV/DIV)
–15
–20
0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7
V
(V)
CM
06741-059
Figure 58. AD8539 Input Offset Voltage vs. Input Common-Mode Voltage
Rev. A | Page 18 of 24
TIME (4µs/DIV)
Figure 61. AD8539 Large Signal Transient Response
06741-062
AD8538/AD8539
1k
AD8539
= ±1.35V
V
SY
–20
–40
–60
0
AD8539
= ±1.35V
V
SY
100
VOLTAGE NOISE DENSITY (nV/ Hz)
10
100 1k 10k 100k
FREQUENCY (Hz)
Figure 62. AD8539 Voltage Noise Density Figure 63. AD8539 Channel Separation vs. Frequency
–80
–100
–120
CHANNEL SEPARATION (dB)
–140
–160
06741-063
100 1k 10k 100k
FREQUENCY (Hz)
06741-064
Rev. A | Page 19 of 24
AD8538/AD8539

OUTLINE DIMENSIONS

2.90 BSC
54
0.50
0.30
2.80 BSC
0.95 BSC
*
1.00 MAX
SEATING PLANE
0.20
0.08
8° 4° 0°
1.60 BSC
*
0.90
0.87
0.84
0.10 MAX
123
PIN 1
1.90 BSC
*
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
0.60
0.45
0.30
5.00 (0.1968)
4.80 (0.1890)
4.00 (0.1574)
3.80 (0.1497)
0.25 (0.0098)
0.10 (0.0040)
COPLANARIT Y
0.10
CONTROLL ING DIM ENSIONS ARE IN MILLI METERS; INCH DIMENSI ONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ON LY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
85
1
1.27 (0.050 0)
SEATING
PLANE
COMPLIANT TO JEDEC STANDARDS MS-012-A A
BSC
6.20 (0.244 1)
5.80 (0.228 4)
4
1.75 (0.0688)
1.35 (0.0532)
0.51 (0.020 1)
0.31 (0.012 2)
8° 0°
0.25 (0.0098)
0.17 (0.0067)
Figure 65. 8-Lead Standard Small Outline Package [SOIC_N]
Narrow Body
(R-8)
Dimensions shown in millimeters and (inches)
0.50 (0.0196 )
0.25 (0.0099 )
1.27 (0.050 0)
0.40 (0.015 7)
45°
012407-A
Rev. A | Page 20 of 24
AD8538/AD8539
0.95
0.85
0.75
0.15
0.00
3.20
3.00
2.80
8
5
4
SEATING PLANE
5.15
4.90
4.65
1.10 MAX
0.23
0.08
8° 0°
3.20
3.00
1
2.80
PIN 1
0.65 BSC
0.38
0.22
COPLANARITY
0.10
COMPLIANT TO JEDEC STANDARDS MO-187-AA
Figure 66. 8-Lead Mini Small Outline Package [MSOP]
0.80
0.60
0.40
(RM-8)
Dimensions shown in millimeters

ORDERING GUIDE

Model Temperature Range Package Description Package Option Branding
AD8538AUJZ-R2 −40°C to +125°C 5-Lead TSOT-23 UJ-5 A0C AD8538AUJZ-REEL −40°C to +125°C 5-Lead TSOT-23 UJ-5 A0C AD8538AUJZ-REEL7 −40°C to +125°C 5-Lead TSOT-23 UJ-5 A0C AD8538ARZ −40°C to +125°C 8-Lead SOIC_N R-8 AD8538ARZ-REEL −40°C to +125°C 8-Lead SOIC_N R-8 AD8538ARZ-REEL7 −40°C to +125°C 8-Lead SOIC_N R-8 AD8539ARMZ-R2 −40°C to +125°C 8-Lead MSOP RM-8 A1S AD8539ARMZ-REEL −40°C to +125°C 8-Lead MSOP RM-8 A1S AD8539ARZ −40°C to +125°C 8-Lead SOIC_N R-8 AD8539ARZ-REEL −40°C to +125°C 8-Lead SOIC_N R-8 AD8539ARZ-REEL7 −40°C to +125°C 8-Lead SOIC_N R-8
1
Z = RoHS Compliant Part.
1
1
1
1
1
1
1
1
1
1
1
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
©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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