ANALOG DEVICES ADA4610-2 Service Manual
JFET Dual Operational Amplifier
Data Sheet
ADA4610-2
Rev. A
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Fax: 781.461.3113 ©2011–2012 Analog Devices, Inc. All rights reserved.
NOTES
1. THE EXPOSED PAD MUST BE
CONNECTED TO V –.
1OUT A
2–IN
A
3+IN A
4V–
7 OUT B
8 V+
6 –IN B
5 +IN B
09646-001
PIN 1
INDICATOR
ADA4610-2
TOP VIEW
(Not to S cale)
09646-002
OUT A
1
–IN A
2
+IN A
3
V–
4
V+
8
OUT B
7
–IN B
6
+IN B
5
ADA4610-2
TOP VIEW
(Not to S cale)
FEATURES
Low offset voltage
B grade: 0.4 mV maximum
A grade: 1 mV maximum
Low offset voltage drift
B grade: 4 µV/°C maximum
A grade: 8 µV/°C maximum
Low input bias current: 5 pA typical at V
Dual-supply operation: ±4.5 V to ±15 V
Low noise
7.3 nV/√Hz typical at f = 1 kHz
0.45 µV p-p at 0.1 Hz to 10 Hz
Low distortion: 0.00006%
No phase reversal
Rail-to-rail output
Unity gain stable
APPLICATIONS
Instrumentation
Medical instruments
Multipole filters
Precision current measurement
Photodiode amplifiers
Sensors
Audio
= ±15 V
SY
Low Noise, Precision, Rail-to-Rail Output,
PIN CONFIGURATIONS
Figure 1. 8-Lead LFCSP (CP Suffix)
Figure 2. 8-Lead SOIC_N (R Suffix) and 8-Lead MSOP (RM Suffix)
GENERAL DESCRIPTION
The ADA4610-2 is a dual channel, precision JFET amplifier
that features low input voltage and current noise, offset voltage,
input bias current, and rail-to-rail output.
The combination of low offset, noise, and very low input
bias current makes these amplifiers especially suitable for
high impedance sensor amplification and precise current
measurements using shunts. With excellent dc precision, low
noise, and fast settling time, the ADA4610-2 provides superior
accuracy in medical instruments, electronic measurement, and
automated test equipment. Unlike many competitive amplifiers,
the ADA4610-2 maintains fast settling performance with
substantial capacitive loads. Unlike many older JFET amplifiers,
the ADA4610-2 does not suffer from output phase reversal
when input voltages exceed the maximum common-mode
voltage range.
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 noti ce. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
The fast slew rate and great stability with capacitive loads make
the ADA4610-2a perfect fit for high performance filters. Low
input bias currents, low offset, and low noise result in a wide
dynamic range for photodiode amplifier circuits. Low noise
and distortion, high output current, and excellent speed make
the ADA4610-2 a great choice for audio applications.
The ADA4610-2 is specified over the −40°C to +125°C
extended industrial temperature range.
The ADA4610-2 is available in the 8-lead narrow SOIC, 8-lead
MSOP, and 8-lead LFCSP packages.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
ADA4610-2 Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Pin Configurations ........................................................................... 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Electrical Characteristics ............................................................. 4
Absolute Maximum Ratings ............................................................ 6
REVISION HISTORY
5/12—Rev. 0 to Rev. A
Changes to Data Sheet Title and General Description Section .. 1
Changed Input Impedance, Differential to Input Capacitance,
Differential in Table 1 ....................................................................... 3
Added Input Resistance in Table 1 ................................................. 3
Changed Input Impedance, Differential to Input Capacitance,
Differential in Table 2....................................................................... 4
Added Input Resistance in Table 2 ................................................. 4
Added Figure 9, Figure 10, and Figure 14 ..................................... 8
Added Figure 15 ................................................................................ 9
Updated Outline Dimensions ....................................................... 16
Changes to Ordering Guide .......................................................... 17
12/11—Revision 0: Initial Version
ESD Caution...................................................................................6
Typical Performance Characteristics ..............................................7
Comparative Voltage and Variable Voltage Graphs ............... 13
Applications Information .............................................................. 15
Comparator Operation .............................................................. 15
Outline Dimensions ....................................................................... 16
Ordering Guide .......................................................................... 17
Rev. A | Page 2 of 20
Data Sheet ADA4610-2
Offset Voltage Drift (A Grade)2
ΔVOS/ΔT
1 8 µV/°C
Output Voltage High
VOH
RL = 2 kΩ
4.85
4.90 V
Voltage Noise
en p-p
0.1 Hz to 10 Hz
0.45 μV p-p
SPECIFICATIONS
VSY = ±5 V, VCM = 0 V, TA = 25°C, unless otherwise noted.
Table 1.
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage (B Grade)1 VOS 0.2 0.4 mV
−40°C < TA < +125°C 0.8 mV
Offset Voltage (A Grade)1 VOS 0.4 1 mV
−40°C < TA < +125°C 1.8 mV
Offset Voltage Drift (B Grade)2 ΔVOS/ΔT 0.5 4 µV/°C
Input Bias Current IB 5 25 pA
−40°C < TA < +125°C 1.5 nA
Input Offset Current IOS 2 20 pA
−40°C < TA < +125°C 0.25 nA
Input Voltage Range −2.5 +2.5 V
Common-Mode Rejection Ratio CMRR VCM = −2.5 V to +2.5 V 94 110 dB
−40°C < TA < +125°C 86 dB
Large Signal Voltage Gain AVO RL = 2 kΩ, V
−40°C < TA < +125°C 86 dB
Input Capacitance, Differential VCM = 0 V 3.1 pF
Input Capacitance, Common-Mode VCM = 0 V 4.8 pF
Input Resistance VCM = 0 V >1 × 1013 Ω
OUTPUT CHARACTERISTICS
= −3.5 V to +3.5 V 98 100 dB
OUT
−40°C < TA < +125°C 4.6 V
RL = 600 Ω 4.6 4.89 V
−40°C < TA < +125°C 4.05 V
Output Voltage Low VOL RL = 2 kΩ −4.95 −4.9 V
−40°C < TA < +125°C −4.75 V
RL = 600 Ω −4.9 −4.8 V
−40°C < TA < +125°C −4.4 V
Short-Circuit Current I
±63 mA
SC
POWER SUPPLY
Power Supply Rejection Ratio PSRR VSY = ±4.5 V to ±18 V 106 125 dB
−40°C < TA < +125°C 103 dB
Supply Current/Amplifier IS I
= 0 mA 1.5 1.7 mA
OUT
−40°C < TA < +125°C 1.85 mA
DYNAMIC PERFORMANCE
Gain Bandwidth Product GBP VIN = 5 mV p-p, RL = 2 kΩ, AV = 100 15.4 MHz
Unity-Gain Crossover UGC VIN = 5 mV p-p, RL = 2 kΩ, AV = −10 9.3 MHz
Phase Margin φ
M
61 Degrees
−3 dB Closed-Loop Bandwidth −3 dB AV = 1, VIN = 5 mV p-p 10.6 MHz
NOISE PERFORMANCE
Voltage Noise Density en f = 10 Hz 14 nV/√Hz
f = 100 Hz 8.2 nV/√Hz
f = 1 kHz 7.3 nV/√Hz
f = 10 kHz 7.3 nV/√Hz
1
Offset voltage does not include solder heat resistance.
2
Guaranteed by design and characterization.
Rev. A | Page 3 of 20
ADA4610-2 Data Sheet
Offset Voltage Drift (B Grade)2
ΔVOS/ΔT
0.5 4 µV/°C
−40°C < TA < +125°C
0.25
nA
OUTPUT CHARACTERISTICS
Output Voltage Low
VOL
RL = 2 kΩ
−14.9
−14.85
V
−40°C < TA < +125°C
2.0
mA
ELECTRICAL CHARACTERISTICS
VSY = ±15 V, VCM = 0 V, TA = 25°C, unless otherwise noted.
Table 2.
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage (B Grade)1 VOS 0.2 0.4 mV
−40°C < TA < +125°C 0.8 mV
Offset Voltage (A Grade)1 VOS 0.4 1 mV
−40°C < TA < +125°C 1.8 mV
Offset Voltage Drift (A Grade)2 ΔVOS/ΔT 1 8 µV/°C
Input Bias Current IB 5 25 pA
−40°C < TA < +125°C 1.5 nA
Input Offset Current IOS 2 20 pA
Input Voltage Range −12.5 +12.5 V
Common-Mode Rejection Ratio CMRR VCM = −12.5 V to +12.5 V 100 115 dB
−40°C < TA < +125°C 96 dB
Large Signal Voltage Gain AVO RL = 2 kΩ, V
−40°C < TA < +125°C 91 dB
Input Capacitance, Differential VCM = 0 V 3.1 pF
Input Capacitance, Common-Mode VCM = 0 V 4.8 pF
Input Resistance VCM = 0 V >1 × 1013 Ω
= ±13.5 V 104 107 dB
OUT
Output Voltage High VOH RL = 2 kΩ 14.8 14.9 V
−40°C < TA < +125°C 14.65 V
RL = 600 Ω 14.25 14.47 V
−40°C < TA < +125°C 13.35 V
−40°C < TA < +125°C −14.75 V
RL = 600 Ω −14.68 −14.6 V
−40°C < TA < +125°C −14.3 V
Short-Circuit Current I
±79 mA
SC
POWER SUPPLY
Power Supply Rejection Ratio PSRR VSY = ±4.5 V to ±18 V 106 125 dB
−40°C < TA < +125°C 103 dB
Supply Current/Amplifier ISY I
= 0 mA 1.6 1.85 mA
OUT
DYNAMIC PERFORMANCE
Slew Rate SR RL = 2 kΩ ±172 +25/−61 V/µs
Gain Bandwidth Product GBP VIN = 5 mV p-p, RL = 2 kΩ, AV = 100 16.3 MHz
Unity-Gain Crossover UGC VIN = 5 mV p-p, RL = 2 kΩ, AV = −10 9.3 MHz
Phase Margin φM 66 Degrees
−3 dB Closed-Loop Bandwidth −3 dB AV = 1, VIN = 5 mV p-p 9.50 MHz
Total Harmonic Distortion (THD) + Noise THD + N 1 kHz, G = +1, RL = 2 kΩ, VIN = 6 V rms 0.00006 %
Rev. A | Page 4 of 20
Data Sheet ADA4610-2
f = 1 kHz
7.3 nV/√Hz
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
NOISE PERFORMANCE
Peak-to-Peak Voltage Noise en p-p 0.1 Hz to 10 Hz bandwidth 0.45 µV p-p
Voltage Noise Density en f = 10 Hz 14 nV/√Hz
f = 100 Hz 8.5 nV/√Hz
f = 10 kHz 7.3 nV/√Hz
1
Offset voltage does not include solder heat resistance.
2
Guaranteed by design and characterization.
Rev. A | Page 5 of 20
ADA4610-2 Data Sheet
Electrostatic Discharge
2500 V
8-Lead SOIC_N (R-8)
120
43
°C/W
ABSOLUTE MAXIMUM RATINGS
Table 3.
Parameter Rating
Supply Voltage ±18 V
Input Voltage ±VS
Output Short-Circuit Duration to GND Observe derating curves
Storage Temperature Range −65°C to +150°C
Operating Temperature Range −40°C to +125°C
Junction Temperature Range −65°C to +150°C
Lead Temperature (Soldering, 10 sec) 300°C
(Human Body Model)
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.
Table 4. Thermal Resistance
Package Type θ
8-Lead MSOP (RM-8) 142 45 °C/W
8-Lead LFCSP_VD (CP-8-9) 57 12 °C/W
1
θJA is specified for worst-case conditions, that is, θJA is specified for device
soldered in circuit board for surface-mount packages.
1
θ
JA
Unit
JC
ESD CAUTION
Rev. A | Page 6 of 20
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