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ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

General Description Features

The ICL761X–ICL764X family of monolithic CMOS op ● Pin-for-Pin Second Source
amps combine ultra-low input current with low-power ● 1pA Typical Bias Current—4nA (max) at +125°C
operation over a wide supply voltage range. With pin-
selectable quiescent currents of 10μA, 100μA, or 1000μA ● ±1V to ±8V Wide Supply Voltage Range
per amplifier, these op amps will operate from ±1V to ● Industry-Standard Pinouts
±8V power supplies, or from single supplies from 2V to ● Programmable Quiescent Currents of 10μA,
16V. The CMOS outputs swing to within milli-volts of the 100μA, and 1000μA
supply voltages.
● Monolithic, Low-Power CMOS Design
The ultra-low bias current of 1pA makes this fam-
ily of op amps ideal for long time constant integrators, Ordering Information
picoammeters, low droop rate sample/hold amplifiers and
other applications where input bias and offset currents are ICL76XX M N OP
critical. A low noise current of 0.01pA√Hz and an input
VOS TEMP
impedance of 1012Ω ensure optimum performance with PKG CODE
SELECTION RANGE
very high source impedances in such applications as pH
meters and photodiode amplifiers. C = 0°C to TV= 8-Pin
A = 2mV
70°C TO-99
Applications E = -40°C to PA = 8-Pin
B = 5mV
● Battery-Powered Instruments +85°C Plastic Dip
● Low-Leakage Amplifiers
M = -55°C to SA = 8-Pin
● Long-Time Constant Integrators C = 10mV
+125°C Small SO
● Low-Frequency Active Filters
● Hearing Aids and Microphone Amplifiers JD = 14-Pin
D = 15mV
● Low Droop Rate Sample/Hold Amplifiers CERDIP
● Picoammeters PD = 14-Pin
E = 20mV
Plastic Dip
Pin Configuration
SD = 14-Pin
TOP VIEW SINGLES—ICL7611/12/14/16
Small SO
TO—99
JE = 16-Pin
(IOSET)*
CERDIP
8
OFFSET V+
1 7 PE = 16-Pin
-IN 2 6 OUTPUT
Plastic Dip
SE = 16-Pin
+IN 3 5 OFFSET
4 Small SO
V-
WE – 16-Pin
*PIN 7 CONNECTED TO CASE
Wide SO
8-PIN DIP

+
OFFSET 1 8 (IOSET)*

IN 2 7 V+

+IN 3 6 OUT
Typical Operating Circuit appears at end of data sheet.

V- 4 5 OFFSET

*EXTERNAL COMPENSATION (ICL7614)

19-0942; Rev 4; 7/21

ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

Ordering Information (continued)

ICL7612

ICL7614

ICL7616

ICL7621

ICL7622

ICL7631

ICL7632

ICL7641

ICL7642
ICL7611

Compensated X X X X X X X X
Externally
X
Compensated
Extended
X X
CMVR
Offset null
X X X X X
capability
Programmable
X X X X X
IQ
Fixed IQ-10µA X
Fixed
X X X
IQ-100µA
Fixed IQ-1mA X

Ordering Information (Single/Dual)

PART TEMP RANGE PIN-PACKAGE PART TEMP RANGE PIN-PACKAGE
ICL761XACPA 0°C to +70°C 8 Plastic Dip ICL7621BCSA 0°C to +70°C 8 Slim SO
ICL761XACSA 0°C to +70°C 8 Slim SO ICL7621BCTV 0°C to +70°C TO-99 Metal Can
ICL761XACTV 0°C to +70°C TO-99 Metal Can ICL7621BMTV -55°C to +125°C TO-99 Metal Can
ICL761XAMTV -55°C to +125°C TO-99 Metal Can ICL7621DCPA 0°C to +70°C 8 Plastic Dip
ICL761XBCPA 0°C to +70°C 8 Plastic Dip ICL7621DCSA 0°C to +70°C 8 Slim SO
ICL761XBCSA 0°C to +70°C 8 Slim SO ICL7621DCTV 0°C to +70°C TO-99 Metal Can
ICL761XBCTV 0°C to +70°C TO-99 Metal Can ICL7621DESA+ -40°C to +85°C 8 Slim SO
ICL761XBESA -40°C to +85°C 8 Slim SO ICL7622ACPD 0°C to +70°C 14 Plastic Dip
ICL761XBMTV -55°C to +125°C TO-99 Metal Can ICL7622ACSD 0°C to +70°C 14 Slim SO
ICL761XDCPA 0°C to +70°C 8 Plastic Dip ICL7622ACJD 0°C to +70°C 14 CERDIP
ICL761XDCSA 0°C to +70°C 8 Slim SO ICL7622AMJD -55°C to +125°C 14 CERDIP
ICL761XDCTV 0°C to +70°C TO-99 Metal Can ICL7622BCPD 0°C to +70°C 14 Plastic Dip
ICL761XDESA -40°C to +85°C 8 Slim SO ICL7622BCSA 0°C to +70°C 14 Slim SO
ICL7621ACPA 0°C to +70°C 8 Plastic Dip ICL7622BCJD 0°C to +70°C 14 CERDIP
ICL7621ACSA 0°C to +70°C 8 Slim SO ICL7622BMJD -55°C to +125°C 14 CERDIP
ICL7621ACTV 0°C to +70°C TO-99 Metal Can ICL7622DCPD 0°C to +70°C 14 Plastic Dip
ICL7621AMTV -55°C to +125°C TO-99 Metal Can ICL7622DCSD 0°C to +70°C 14 Slim SO
ICL7621BCPA 0°C to +70°C 8 Plastic Dip ICL7622DCJD 0°C to +70°C 14 CERDIP
Note: X above is replaced by: 1, 2, 4, 8.

www.maximintegrated.com Maxim Integrated │ 2

ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

Pin Configurations

TOP VIEW SINGLES—ICL7611/12/14/16 DUALS—ICL7621/22

TO—99 TO—99

(IOSET)* V+

8 8 14 LEAD
OFFSET V+ OUTA OUTB
1 7 1 7

+
-IN 2 6 OUTPUT -INA 2 6 -INB -INA 1 14 OFFSETA

+IN 3 5 OFFSET +INA 3 5 +IN

B
4 4 +INA 2 13 V+
V- V- + -
A
*PIN 7 CONNECTED TO CASE
OFFSETA 3 12 OUTA

V- 4 11 N.C.
8 LEAD 8 LEAD

+ + OFFSETB 5 10 OUTB
OFFSET 1 8 (IOSET)* OUTA 1 8 V+
B
+ -
A
- + +INB 6 9 V+
-IN 2 7 V+ -INA 2 7 OUTB
B
+ - -INB 7 8 OFFSETB
+IN 3 6 OUT +INA 3 6 -INB

NOTE: PINS 9 & 13 ARE INTERNALLY CONNECTED

V- 4 5 OFFSET V- 4 5 +INB

*EXTERNAL COMPENSATION (ICL7614)

www.maximintegrated.com Maxim Integrated │ 3

ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

Absolute Maximum Ratings (Single/Dual)

Total Supply Voltage (V+ to V-) ...........................................+18V Operating Temperature Ranges:
Input Voltage .......................................(V+ + 0.3V) to (V- - 0.3V) M Series............................................................ -55°C to +125°C
Differential Input Voltage (Note 1) .....±(V+ + 0.3V) to (V- - 0.3V) E Series .............................................................. -40°C to +85°C
Duration of Output Short Circuit (Note 2) ..................... Unlimited C Series ............................................................... -0°C to +70°C
Continuous Power Dissipation (TA = +25°C) Storage Temperature Range ............................ -55°C to +150°C
TO-99 Metal Can (derate 2mW/°C above +25°C) ......250mW Lead Temperature (soldering, 10s) ................................. +300°C
8-Pin Minidip (derate 2mW/°C above +25°C) .............250mW Soldering Temperature (reflow)
14-Pin Plastic (derate 3mW/°C above +25°C) ............375mW Lead(Pb)-Free Packages.............................................+260°C
14-Pin CERDIP (derate 4mW/°C above +25°C) .........500mW Packages Containing Lead..........................................+240°C
16-Pin Plastic (derate 3mW/°C above +25°C) ............375mW
16-Pin CERDIP (derate 4mW/°C above +25°C) .........500mW
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation
of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device reliability.

Note 1: Long-term offset voltage stability will be degraded if large input differential voltages are applied for long periods of time.
Note 2: The outputs may be shorted to ground or to either supply for VSUPP ≤ 10V. Care must be taken to insure that the
dissipation rating is not exceeded.

Electrical Characteristics (Single/Dual)

(VSUPP = ±1.0V, IQ = 10μA, TA = +25°C, unless otherwise noted.)

ICL76XXA ICL76XXB
PARAMETER SYMBOL CONDITIONS UNITS
MIN TYP MAX MIN TYP MAX
RS ≤ 100kΩ,
2 5
TA = +25°C
Input Offset Voltage VOS mV
RS ≤ 100kΩ,
3 7
TMIN ≤ TA ≤ TMAX
Temperature
ΔVOS/ΔT RS ≤ 100kΩ 10 15 µV/°C
Coefficient of VOS
TA = +25°C 0.5 30 0.5 30
Input Offset Current IOS pA
0°C ≤ TA ≤ +70°C 300 300
TA = +25°C 1.0 50 1.0 50
Input Bias Current IBIAS pA
0°C ≤ TA ≤ +70°C 500 500

Common-Mode
Voltage Range
VCMR -0.4 +0.6 -0.4 +0.6 V
(Except ICL7612/
ICL7616)

Extended Common-
Mode Voltage Range VCMR -1.1 +0.6 -1.1 +0.6 V
(ICL7612 Only)

Extended Common-
Mode Voltage Range VCMR IQ = 10µA -1.3 -0.3 -1.3 -0.3 V
(ICL7616 Only)

RL = 1MΩ, TA = +25°C ±0.98 ±0.98

Output Voltage Swing VOUT V
RL = 1MΩ, 0°C ≤ TA ≤ +70°C ±0.96 ±0.96

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ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

Electrical Characteristics (Single/Dual) (continued)

(VSUPP = ±1.0V, IQ = 10μA, TA = +25°C, unless otherwise noted.)

ICL76XXA ICL76XXB
PARAMETER SYMBOL CONDITIONS UNITS
MIN TYP MAX MIN TYP MAX
VO = ±0.1V, RL = 1MΩ,
90 90
Large-Signal Voltage TA = +25°C
AVOL dB
Gain VO = ±0.1V, RL = 1MΩ,
80 80
0°C ≤ TA ≤ +70°C
Unity-Gain Bandwidth GBW 0.044 0.044 MHz
Input Resistance RIN 1012 1012 Ω
Common-Mode
CMRR RS ≤ 100kΩ 80 80 dB
Rejection Ratio
Power-Supply
PSRR RS ≤ 100kΩ 80 80 dB
Rejection Ratio
Input-Referred Noise
en RS = 100Ω, f = 1kHz 100 100 nV/√Hz
Voltage
Input-Referred Noise
in RS = 100Ω, f = 1kHz 0.01 0.01 pA/√Hz
Current
Supply Current
ISUPP No signal, no load 6 15 6 15 µA
(Per Amplifier)
AVOL = 1, CL = 100pF,
Slew Rate SR 0.016 0.016 V/µs
VIN = 0.2VP-P, RL = 1MΩ
VIN = 50mV, CL = 100pF,
Rise Time tr 20 20 µs
RL = 1MΩ
VIN = 50mV, CL = 100pF,
Overshoot Factor 5 5 %
RL = 1MΩ

Electrical Characteristics (Single/Dual)

(VSUPP = ±5.0V, TA = +25°C, unless otherwise noted.)

ICL76XXA ICL76XXB ICL76XXD

PARAMETER SYMBOL CONDITIONS UNITS
MIN TYP MAX MIN TYP MAX MIN TYP MAX
RS ≤ 100kΩ,
2 5 15
Input Offset TA = +25°C
VOS mV
Voltage RS ≤ 100kΩ,
3 7 20
TMIN ≤ TA ≤ TMAX
Temperature
ΔVOS/ΔT RS ≤ 100kΩ 10 15 25 µV/°C
Coefficient of VOS
TA = +25°C 0.5 30 0.5 30 0.5 30
C: 0°C ≤ TA ≤ +70°C 300 300 300
Input Offset E: -40°C ≤ TA ≤
IOS 800 800 800 pA
Current +85°C
M: -55°C ≤ TA ≤
800 800 800
+125°C

www.maximintegrated.com Maxim Integrated │ 5

ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

Electrical Characteristics (Single/Dual) (continued)

(VSUPP = ±5.0V, TA = +25°C, unless otherwise noted.)

ICL76XXA ICL76XXB ICL76XXD

PARAMETER SYMBOL CONDITIONS UNITS
MIN TYP MAX MIN TYP MAX MIN TYP MAX
TA = +25°C 1.0 50 1.0 50 1.0 50
C: 0°C ≤ TA ≤ +70°C 400 400 400

Input Bias Current IBIAS E: -40°C ≤ TA ≤ pA

4000 4000 4000
+85°C
M: -55°C ≤ TA ≤
4000 4000 4000
+125°C
+4.4 +4.4 +4.4
IQ = 10µA (Note 3)
-4.0 -4.0 -4.0
Common-Mode
Voltage Range +4.2 +4.2 +4.2
VCMR IQ = 100µA (Note 3) V
(Except ICL7612/ -4.0 -4.0 -4.0
ICL7616)
+3.7 +3.7 +3.7
IQ = 1mA (Note 3)
-3.7 -3.7 -3.7
IQ = 10µA ±5.3 ±5.3 ±5.3
Extended +5.3 +5.3 +5.3
Common-Mode IQ = 100µA
VCMR -5.1 -5.1 -5.1 V
Voltage Range
(ICL7612 Only) +5.3 +5.3 +5.3
IQ = 1mA
-4.5 -4.5 -4.5
-5.3 -5.3 -5.3
IQ = 10µA
+3.7 +3.7 +3.5
Extended
Common-Mode -5.1 -5.1 -5.1
VCMR IQ = 100µA V
Voltage Range +3.0 +3.0 +2.7
(ICL7616 Only)
-4.5 -4.5 -4.5
IQ = 1mA
+2.0 +2.0 +1.7

www.maximintegrated.com Maxim Integrated │ 6

ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

Electrical Characteristics (Single/Dual) (continued)

(VSUPP = ±5.0V, TA = +25°C, unless otherwise noted.)

ICL76XXA ICL76XXB ICL76XXD

PARAMETER SYMBOL CONDITIONS UNITS
MIN TYP MAX MIN TYP MAX MIN TYP MAX
TA =
±4.9 ±4.9 ±4.9
+25°C

C: 0°C
≤ TA ≤ ±4.8 ±4.8 ±4.8
IQ =
+70°C
10µA,
RL = E: -40°C
1MΩ ≤ TA ≤ ±4.7 ±4.7 ±4.7
(Note 3) +85°C

M: -55°C
≤ TA ≤ ±4.7 ±4.7 ±4.7
+125°C

TA =
±4.9 ±4.9 ±4.9
+25°C

C: 0°C
≤ TA ≤ ±4.8 ±4.8 ±4.8
IQ = +70°C
Output Voltage 100µA,
VOUT E: -40°C V
Swing RL =
100kΩ ≤ TA ≤ ±4.5 ±4.5 ±4.5
+85°C

M: -55°C
≤ TA ≤ ±4.5 ±4.5 ±4.5
+125°C

TA =
±4.5 ±4.5 ±4.5
+25°C

C: 0°C
≤ TA ≤ ±4.3 ±4.3 ±4.3
IQ = +70°C
1mA, RL
= 10kΩ E: -40°C
(Note 3) ≤ TA ≤ ±4.0 ±4.0 ±4.0
+85°C

M: -55°C
≤ TA ≤ ±4.0 ±4.0 ±4.0
+125°C

www.maximintegrated.com Maxim Integrated │ 7

ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

Electrical Characteristics (Single/Dual) (continued)

(VSUPP = ±5.0V, TA = +25°C, unless otherwise noted.)

ICL76XXA ICL76XXB ICL76XXD

PARAMETER SYMBOL CONDITIONS UNITS
MIN TYP MAX MIN TYP MAX MIN TYP MAX
TA =
86 104 80 104 80 104
+25°C

C: 0°C
VO = ≤ TA ≤ 80 75 75
±4.0V +70°C
RL =
1MΩ, E: -40°C
IQ = ≤ TA ≤ 74 68 68
10µA +85°C

M: -55°C
≤ TA ≤ 74 68 68
+125°C

TA =
86 102 80 102 80 102
+25°C

C: 0°C
VO = ≤ TA ≤ 80 75 75
±4.0V, +70°C
Large-Signal RL =
AVOL E: -40°C dB
Voltage Gain 100kΩ,
IQ = ≤ TA ≤ 74 68 68
100µA +85°C

M: -55°C
≤ TA ≤ 74 68 68
+125°C

TA =
80 83 76 83 76 83
+25°C

C: 0°C
VO = ≤ TA ≤ 76 72 72
±4.0V, +70°C
RL =
10kΩ, E: -40°C
IQ = 1mA ≤ TA ≤ 72 68 68
(Note 3) +85°C

M: -55°C
≤ TA ≤ 72 68 68
+125°C

www.maximintegrated.com Maxim Integrated │ 8

ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

Electrical Characteristics (Single/Dual) (continued)

(VSUPP = ±5.0V, TA = +25°C, unless otherwise noted.)

ICL76XXA ICL76XXB ICL76XXD

PARAMETER SYMBOL CONDITIONS UNITS
MIN TYP MAX MIN TYP MAX MIN TYP MAX
IQ = 10µA (Note 3) 0.044 0.044 0.044
Unity-Gain
GBW IQ = 100µA 0.48 0.48 0.48 MHz
Bandwidth
IQ = 1mA (Note 3) 1.4 1.4 1.4
Input Resistance RIN 1012 1012 1012 Ω
RS ≤ 100kΩ,
76 96 70 96 70 96
IQ = 10µA (Note 3)
Common-Mode RS ≤ 100kΩ,
CMRR 76 91 70 91 70 91 dB
Rejection Ratio IQ = 100µA
RS ≤ 100kΩ,
66 87 60 87 60 87
IQ = 1mA (Note 3)
RS ≤ 100kΩ,
80 94 80 94 80 94
IQ = 10µA (Note 3)
Power-Supply RS ≤ 100kΩ,
PSRR 80 86 80 86 80 86 dB
Rejection Ratio IQ = 100µA
RS ≤ 100kΩ,
70 77 70 77 70 77
IQ = 1mA (Note 3)
Input-Referred RS = 100Ω,
en 100 100 100 nV/√Hz
Noise Voltage f = 1kHz
Input-Referred RS = 100Ω,
in 0.01 0.01 0.01 pA/√Hz
Noise Current f = 1kHz
IQ = 10µA
0.01 0.02 0.01 0.02 0.01 0.02
(Note 3)
No
Supply Current IQ =
ISUPP signal, 0.1 0.25 0.1 0.25 0.1 0.25 mA
(Per Amplifier) 100µA
no load
IQ = 1mA
1.0 2.5 1.0 2.5 1.0 2.5
(Note 3)
Channel
VO1 / VO2 AVOL = 100 120 120 120 dB
Separation

www.maximintegrated.com Maxim Integrated │ 9

ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

Electrical Characteristics (Single/Dual) (continued)

(VSUPP = ±5.0V, TA = +25°C, unless otherwise noted.)

ICL76XXA ICL76XXB ICL76XXD

PARAMETER SYMBOL CONDITIONS UNITS
MIN TYP MAX MIN TYP MAX MIN TYP MAX

IQ = 10µA
(Note 3), 0.016 0.016 0.016
RL = 1MΩ
AVOL =
1, CL = IQ =
Slew Rate
SR 100pF, 100µA, RL 0.16 0.16 0.16 V/µs
(Note 4)
VIN = = 100kΩ
8VP-P
IQ = 1mA
(Note 3), 1.6 1.6 1.6
RL = 10kΩ

IQ = 10µA
(Note 3), 20 20 20
RL = 1MΩ
VIN =
IQ =
Rise Time 50mV,
tr 100µA, RL 2 2 2 µs
(Note 4) CL =
= 100kΩ
100pF
IQ = 1mA
(Note 3), 0.9 0.9 0.9
RL = 10kΩ

IQ = 10µA
(Note 3), 5 5 5
RL = 1MΩ
VIN =
IQ =
Overshoot Factor 50mV,
100µA, RL 10 10 10 %
(Note 4) CL =
= 100kΩ
100pF
IQ = 1mA
(Note 3), 40 40 40
RL = 10kΩ

Note 3: AICL7611, ICL7612, ICL7616 only.

Note 4: ICL7814; 39pF from pin 6 to pin 8.

www.maximintegrated.com Maxim Integrated │ 10

ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

Ordering Information (Triple/Quad)

PART TEMP RANGE PIN-PACKAGE PART TEMP RANGE PIN-PACKAGE
ICL763XBCPE 0°C to +70°C 16 Plastic Dip ICL764XBCPD 0°C to +70°C 14 Plastic Dip
ICL763XBCSE 0°C to +70°C 16 Slim SO ICL764XBCWE 0°C to +70°C 16 Wide SO
ICL763XCCPE 0°C to +70°C 16 Plastic Dip ICL764XCCPD 0°C to +70°C 14 Plastic Dip
ICL763XCCSE 0°C to +70°C 16 Slim SO ICL764XCCWE 0°C to +70°C 16 Wide SO
ICL763XECPE 0°C to +70°C 16 Plastic Dip ICL764XECPD 0°C to +70°C 14 Plastic Dip
ICL763XECSE 0°C to +70°C 16 Slim SO ICL764XECWE 0°C to +70°C 16 Wide SO
ICL763XBCJE 0°C to +70°C 16 CERDIP ICL764XBCJD 0°C to +70°C 14 CERDIP
ICL763XCCJE 0°C to +70°C 16 CERDIP ICL764XCCJD 0°C to +70°C 14 CERDIP
ICL763XECJE 0°C to +70°C 16 CERDIP ICL764XECJD 0°C to +70°C 14 CERDIP
ICL763XBMJE -55°C to +125°C 16 CERDIP ICL764XBMJD -55°C to +125°C 14 CERDIP
ICL763XCMJE -55°C to +125°C 16 CERDIP ICL764XCMJD -55°C to +125°C 14 CERDIP

Note: X above is replaced by: 1, 2.

Pin Configurations

TOP VIEW
ICL7631/32 ICL7641/42 ICL7641/42
16 LEAD 16 LEAD WIDE S.O. 14 LEAD

+ + +
N.C. 1 16 IOC SET OUTA 1 16 OUTD OUTA 1 16 OUTD

A D A D
- + + - - + + -
-INA 2 15 V+ -INA 2 15 -IND -INA 2 15 -IND

-
A
+INA 3 + 14 OUTA +INA 3 14 +IND +INA 3 14 +IND

OUTB 4 + 13 +INB V+ 4 13 V- V+ 4 13 V-
B
-

V+ 5 12 -INB INB 5 12 +INC INB 5 12 +INC

SET IOC 6 11 IOB SET -INB 6 11 -INC -INB 6 11 -INC

- + + - - + + -
B C B C
-
-INC 7 C 10 OUT OUTB 7 10 OUTC OUTB 7 10 OUTC
+

+INC 8 9 V- N.C. 8 9 N.C.

NOTE: PINS 5 & 15 ARE INTERNALLY CONNECTED

www.maximintegrated.com Maxim Integrated │ 11

ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

Absolute Maximum Ratings (Triple/Quad)

Total Supply Voltage (V+ to V-) ...........................................+18V 16-Pin Plastic (derate 3mW/°C above +25°C).............375mW
Input Voltage .......................................(V+ + 0.3V) to (V- - 0.3V) 16-Pin CERDIP (derate 4mW/°C above +25°C)..........500mW
Differential Input Voltage (Note 5).......±|(V+ + 0.3V) - (V- - 0.3V) Operating Temperature Ranges:
Duration of Output Short Circuit (Note 6) ..................... Unlimited M Series............................................................ -55°C to +125°C
Continuous Power Dissipation (TA = +25°C) E Series............................................................... -40°C to +85°C
TO-99 Metal Can (derate 2mW/°C above +25°C)........250mW C Series .................................................................-0°C to +70°C
8-Pin Minidip (derate 2mW/°C above +25°C)..............250mW Storage Temperature Range............................. -55°C to +150°C
14-Pin Plastic (derate 3mW/°C above +25°C).............375mW Lead Temperature (soldering, 10s).................................. +300°C
14-Pin CERDIP (derate 4mW/°C above +25°C)..........500mW
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation
of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device reliability.

Note 5: Long-term offset voltage stability will be degraded if large input differential voltages are applied for long periods of time.
Note 6: The outputs may be shorted to ground or to either supply for VSUPP ≤ 10V. Care must be taken to insure that the
dissipation rating is not exceeded.

Electrical Characteristics (Triple/Quad)

(VSUPP = ±1.0V, IQ = 10μA, TA = +25°C, unless otherwise noted.) (Specifications apply to ICL7631/7632/7642 only.)

ICL76XXB ICL76XXC
PARAMETER SYMBOL CONDITIONS UNITS
MIN TYP MAX MIN TYP MAX
RS ≤ 100kΩ,
5 10
TA = +25°C
Input Offset Voltage VOS mV
RS ≤ 100kΩ,
7 12
TMIN ≤ TA ≤ TMAX
Temperature
ΔVOS/ΔT RS ≤ 100kΩ 15 20 µV/°C
Coefficient of VOS
TA = +25°C 0.5 30 0.5 30
Input Offset Current IOS pA
0°C ≤ TA ≤ +70°C 300 300
TA = +25°C 1.0 50 1.0 50
Input Bias Current IBIAS pA
0°C ≤ TA ≤ +70°C 500 500
Common-Mode
VCMR -0.4 +0.6 -0.4 +0.6 V
Voltage Range
RL = 1MΩ, TA = +25°C ±0.98 ±0.98
Output Voltage
VOUT RL = 1MΩ, 0°C ≤ TA ≤ V
Swing ±0.96 ±0.96
+70°C
VO = ±0.1V, RL = 1MΩ,
90 90
Large-Signal Voltage TA = +25°C
AVOL dB
Gain VO = ±0.1V, RL = 1MΩ,
80 80
0°C ≤ TA ≤ +70°C
Unity-Gain
GBW 0.044 0.044 MHz
Bandwidth
Input Resistance RIN 1012 1012 Ω
Common-Mode
CMRR RS ≤ 100kΩ 80 80 dB
Rejection Ratio

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ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

Electrical Characteristics (Triple/Quad) (continued)

(VSUPP = ±1.0V, IQ = 10μA, TA = +25°C, unless otherwise noted.) (Specifications apply to ICL7631/7632/7642 only.)

ICL76XXB ICL76XXC
PARAMETER SYMBOL CONDITIONS UNITS
MIN TYP MAX MIN TYP MAX
Power-Supply
PSRR 80 80 dB
Rejection Ratio
Input-Referred Noise
en RS = 100Ω, f = 1kHz 100 100 nV/√Hz
Voltage
Input-Referred Noise
in RS = 100Ω, f = 1kHz 0.01 0.01 pA/√Hz
Current
Supply Current
ISUPP No signal, no load 6 15 6 15 µA
(Per Amplifier)
Channel Separation VO1 / VO2 AVOL = 100 120 120 dB
AVOL = 1, CL = 100pF,
Slew Rate SR 0.016 0.016 V/µs
VIN = 0.2VP-P, RL = 1MΩ
VIN = 50mV, CL = 100pF,
Rise Time tr 20 20 µs
RL = 1MΩ
VIN = 50mV, CL = 100pF,
Overshoot Factor 5 5 %
RL = 1MΩ

Electrical Characteristics (Triple/Quad)

(VSUPP = ±5.0V, TA = +25°C, unless otherwise noted.)

ICL76XXB ICL76XXC ICL76XXE

PARAMETER SYMBOL CONDITIONS UNITS
MIN TYP MAX MIN TYP MAX MIN TYP MAX
RS ≤ 100kΩ,
5 10 20
Input Offset TA = +25°C
VOS mV
Voltage RS ≤ 100kΩ,
7 15 25
TMIN ≤ TA ≤ TMAX
Temperature
ΔVOS/ΔT RS ≤ 100kΩ 15 20 30 µV/°C
Coefficient of VOS
TA = +25°C 0.5 30 0.5 30 0.5 30
Input Offset C: 0°C ≤ TA ≤ +70°C 300 300 300
IOS pA
Current
M: -55°C ≤ TA ≤
800 800 800
+125°C
TA = +25°C 1.0 50 1.0 50 1.0 50
C: 0°C ≤ TA ≤ +70°C 500 500 500
Input Bias Current IBIAS pA
M: -55°C ≤ TA ≤
4000 4000 4000
+125°C

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ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

Electrical Characteristics (Triple/Quad) (continued)

(VSUPP = ±5.0V, TA = +25°C, unless otherwise noted.)

ICL76XXB ICL76XXC ICL76XXE

PARAMETER SYMBOL CONDITIONS UNITS
MIN TYP MAX MIN TYP MAX MIN TYP MAX
+4.4 +4.4 +4.4
IQ = 10µA (Note 7)
-4.0 -4.0 -4.0

Common-Mode +4.2 +4.2 +4.2

VCMR IQ = 100µA (Note 9) V
Voltage Range -4.0 -4.0 -4.0
+3.7 +3.7 +3.7
IQ = 1mA (Note 8)
-3.7 -3.7 -3.7
TA =
±4.9 Q4.9 Q4.9
+25°C
IQ =
C: 0°C
10µA,
≤ TA ≤ ±4.8 ±4.8 ±4.8
RL =
+70°C
1MΩ
(Note 7) M: -55°C
≤ TA ≤ ±4.7 ±4.7 ±4.7
+125°C

TA =
±4.9 ±4.9 ±4.9
+25°C
IQ =
C: 0°C
100µA,
Output Voltage ≤ TA ≤ ±4.8 ±4.8 ±4.8
VOUT RL = V
Swing +70°C
100kΩ
(Note 9) M: -55°C
≤ TA ≤ ±4.5 ±4.5 ±4.5
+125°C

TA =
±4.5 ±4.5 ±4.5
+25°C

IQ = C: 0°C
1mA, RL ≤ TA ≤ ±4.3 ±4.3 ±4.3
= 10kΩ +70°C
(Note 8)
M: -55°C
≤ TA ≤ ±4.0 ±4.0 ±4.0
+125°C

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ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

Electrical Characteristics (Triple/Quad) (continued)

(VSUPP = ±5.0V, TA = +25°C, unless otherwise noted.)

ICL76XXB ICL76XXC ICL76XXE

PARAMETER SYMBOL CONDITIONS UNITS
MIN TYP MAX MIN TYP MAX MIN TYP MAX
TA =
86 104 80 104 80 104
VO = +25°C
±4.0V,
C: 0°C
RL =
≤ TA ≤ 80 75 75
1MΩ,
+70°C
IQ =
10µA M: -55°C
(Note 7) ≤ TA ≤ 74 68 68
+125°C

TA =
86 102 80 102 80 102
+25°C
VO =
±4.0V, C: 0°C
Large-Signal RL = ≤ TA ≤ 80 75 75
AVOL dB
Voltage Gain 100kΩ, +70°C
IQ =
M: -55°C
100µA
≤ TA ≤ 74 68 68
+125°C

TA =
86 98 80 98 80 98
VO = +25°C
±4.0V,
C: 0°C
RL =
≤ TA ≤ 80 75 75
10kΩ
+70°C
(Note 8),
IQ = 1mA M: -55°C
(Note 7) ≤ TA ≤ 74 68 68
+125°C

www.maximintegrated.com Maxim Integrated │ 15

ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

Electrical Characteristics (Triple/Quad) (continued)

(VSUPP = ±5.0V, TA = +25°C, unless otherwise noted.)

ICL76XXB ICL76XXC ICL76XXE UNITS

PARAMETER SYMBOL CONDITIONS
MIN TYP MAX MIN TYP MAX MIN TYP MAX
IQ = 10µA (Note 7) 0.044 0.044 0.044
Unity-Gain
GBW IQ = 100µA (Note 9) 0.48 0.48 0.48 MHz
Bandwidth
IQ = 1mA (Note 8) 1.4 1.4 1.4
Input Resistance RIN 1012 1012 1012 Ω
RS ≤ 100kΩ,
76 96 70 96 70 96
IQ = 10µA (Note 7)
Common-Mode RS ≤ 100kΩ,
CMRR 76 91 70 91 70 91 dB
Rejection Ratio IQ = 100µA
RS ≤ 100kΩ,
66 87 60 87 60 87
IQ = 1mA (Note 8)
RS ≤ 100kΩ,
80 94 80 94 80 94
IQ = 10µA (Note 7)
Power-Supply RS ≤ 100kΩ,
PSRR 80 86 80 86 80 86 dB
Rejection Ratio IQ = 100µA
RS ≤ 100kΩ,
70 77 70 77 70 77
IQ = 1mA (Note 8)
Input-Referred
en RS = 100Ω, f = 1kHz 100 100 100 nV/√Hz
Noise Voltage
Input-Referred
in RS = 100Ω, f = 1kHz 0.01 0.01 0.01 pA/√Hz
Noise Current
IQ = 10µA
0.01 0.022 0.01 0.022 0.01 0.022
(Note 7)
No
Supply Current IQ =
ISUPP signal, 0.1 0.25 0.1 0.25 0.1 0.25 mA
(Per Amplifier) 100µA
no load
IQ = 1mA
1.0 2.5 1.0 2.5 1.0 2.5
(Note 8)
Channel
VO1 / VO2 AVOL = 100 120 120 120 dB
Separation

IQ = 10µA
(Note 7), 0.016 0.016 0.016
RL = 1MΩ
AVOL =
1, CL = IQ =
Slew Rate
SR 100pF, 100µA, RL 0.16 0.16 0.16 V/µs
(Note 10)
VIN = = 100kΩ
8VP-P
IQ = 1mA
(Note 7), 1.6 1.6 1.6
RL = 10kΩ

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ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

Electrical Characteristics (Triple/Quad) (continued)

(VSUPP = ±5.0V, TA = +25°C, unless otherwise noted.)

ICL76XXB ICL76XXC ICL76XXE

PARAMETER SYMBOL CONDITIONS UNITS
MIN TYP MAX MIN TYP MAX MIN TYP MAX

IQ = 10µA
(Note 7), 20 20 20
RL = 1MΩ
VIN =
Rise Time 50mV, IQ = 100µA,
tr 2 2 2 µs
(Note 10) CL = RL = 100kΩ
100pF
IQ = 1mA
(Note 8), 0.9 0.9 0.9
RL = 10kΩ

IQ = 10µA
(Note 7), 5 5 5
RL = 1MΩ
VIN =
Overshoot Factor 50mV, IQ = 100µA,
10 10 10 %
(Note 10) CL = RL = 100kΩ
100pF
IQ = 1mA
(Note 8), 40 40 40
RL = 10kΩ
Note 7: Does not apply to ICL7641.
Note 8: Does not apply to ICL7642.
Note 9: ICL7631/ICL7632 only.
Note 10: Does not apply to ICL7632.

Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)

MAXIMUM PEAK-TO-PEAK MAXIMUM PEAK-TO-PEAK

VOLTAGE AS A FUNCTION OF OUTPUT VOLTAGE AS A
FREE-AIR TEMPERATURE FUNCTION OF SUPPLY VOLTAGE
MAXIMUM PEAK-TO-PEAK OUTPUT VOLTAGE – V

MAXIMUM PEAK-TO-PEAK OUTPUT VOLTAGE – V

12 16
RL = 100kΩ TA = │+│25°C
10 14 IQ = 1mA

12
RL = 10kΩ
Ω

8
1M
—

10
Ω
0k

6
kΩ
10

RL = │2│kΩ
10
L=

8
L=
R

4
6

2 VSUPP = 10 VOLTS 4
IQ = 1mA
0 2
-75 -50 -25 0 +25 +50 +100 +125 2 4 6 8 10 12 14 16
FREE-AIR TEMPERATURE – °C SUPPLY VOLTAGE – VOLTS

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ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

Typical Operating Characteristics (continued)

(TA = +25°C, unless otherwise noted.)

SUPPLY CURRENT PER AMPLIFIER PEAK-TO-PEAK OUTPUT VOLTAGE

AS A FUNCTION OF SUPPLY VOLTAGE AS A FUNCTION OF FREQUENCY

MAXIMUM PEAK-TO-PEAK OUTPUT VOLTAGE – V

10k 16
TA = +25°C TA = +25°C
NO LOAD 14 IQ = 1mA
NO SIGNAL IQ = 1mA IQ = 10µA
1k 12
SUPPLY CIRRENT – µA

IQ = 100µA

10 VSUPP = 16V
IQ = 100µA
100 8
VSUPP = 10V
6
IQ = 10µA
10 4

2
VSUPP = + 2V
1 0
0 2 4 6 8 10 12 14 16 100 1k 10k 100k 1M 10M
SUPPLY VOLTAGE – VOLTS FREQUENCY – Hz

POWER SUPPLY REJECTION LARGE SIGNAL DIFFERENTIAL

RATIO AS A FUNCTION OF VOLTAGE GAIN AS A FUNCTION
FREE-AIR TEMPERATURE OF FREE-AIR TEMPERATURE
100 1000
SUPPLY VOLTAGE REJECTION RATIO – dB

IQ = 1mA VSUPP = 10V

DIFFERENTIAL VOLTAGE GAIN – V/mV

95 RL = 1MΩ
IQ = 10µA
90 IQ = 100µA
100
85
IQ = 10µA
RL = 100kΩ
80 IQ = 100µA
10 RL = 10kΩ
75
IQ = 1mA
70 VSUPP = 10 VOLTS
VOUT = 8 VOLTS
65 1
-75 -50 -25 0 +25 +50 +75 +100 +125 -75 -50 -25 0 +25 +50 +75 +100 +125
FREE-AIR TEMPERATURE – °C FREE-AIR TEMPERATURE – °C

LARGE SIGNAL DIFFERENTIAL MAXIMUM OUTPUT

VOLTAGE GAIN AND PHASE SHIFT SINK CURRENT AS A
AS A FUNCTION OF FREQUENCY FUNCTION OF SUPPLY VOLTAGE
107 0.01
MAXIMUM OUTPUT SINK CURRENT – mA

VSUPP = 16V
106 IQ = 100µA
DIFFERENTIAL VOLTAGE GAIN

IQ = 10µA
105
0.1
IQ = 1mA
104 0° IQ = 100µA

103 45°
1.0 IQ = 1mA
102 PHASE SHIFT 90°
│IQ = 1mA│
10 IQ = 10µA 135°

1 180° 10
0.1 1 10 100 1k 10k 100k 1M 0 2 4 6 8 10 12 14 16
FREQUENCY – Hz SUPPLY VOLTAGE – VOLTS

www.maximintegrated.com Maxim Integrated │ 18

ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

Typical Operating Characteristics (continued)

(TA = +25°C, unless otherwise noted.)

INPUT BIAS CURRENT AS A EQUIVALENT INPUT NOISE VOLTAGE

FUNCTION OF TEMPERATURE AS A FUNCTION OF FREQUENCY
1000 600

EQUIVALENT INPUT NOISE VOLTAGE – nV √Hz

VSUPP = 10V TA = +25°C
500 3V ≤ VSUPP ≤ 16V
INPUT BIAS CURRENT – pA

100
400

10 300

200
1.0
100

0.1 0
-50 -25 0 +25 +50 +75 +100 +125 10 100 1k 10k 100k
FREE-AIR TEMPERATURE – °C FREQUENCY – Hz

COMMON MODE REJECTION SUPPLY CURRENT PER

RATIO AS A FUNCTION AMPLIFIER AS A FUNCTION OF
OF FREE-AIR TEMPERATURE FREE-AIR TEMPERATURE
105 104
VSUPP = 10 VOLTS
COMMON MODE REJECTION RATIO – dB

VSUPP = 10V
IQ = 10µA NO LOAD
100 IQ = 1mA
NO SIGNAL
IQ = 100µA 103
SUPPLY CURRENT – µA

95

IQ = 1mA IQ = 100µA
90
102
85
IQ = 10µA
80
10
75

70 1
-75 -50 -25 0 +25 +50 +75 +100 +125 -50 -25 0 +25 +50 +75 +100 +125
FREE-AIR TEMPERATURE – °C FREE-AIR TEMPERATURE – °C

MAXIMUM PEAK-TO-PEAK OUTPUT MAXIMUM OUTPUT/SOURCE

VOLTAGE AS A FUNCTION OF CURRENT AS A FUNCTION
LOAD RESISTANCE OF SUPPLY VOLTAGE
MAXIMUM PEAK-TO-PEAK OUTPUT VOLTAGE – V

16 40
MAXIMUM OUTPUT SOURCE CURRENT – mA

VSUPP = 10 VOLTS VSUPP = 10V

14
TA = 25°C VOUT = V”
12 IQ = 1mA 30 ALL IQ = SETINGS

10

8 20

4 10

1 0
0.1 1.0 10 100 0 2 4 6 8 10 12 14 16
LOAD RESISTANCE – kΩ SUPPLY VOLTAGE – VOLTS

www.maximintegrated.com Maxim Integrated │ 19

ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

Typical Operating Characteristics (continued)

(TA = +25°C, unless otherwise noted.)

VOLTAGE FOLLOWER LARGE VOLTAGE FOLLOWER LARGE

SIGNAL PULSE RESPONSE SIGNAL PULSE RESPONSE
8 8
VSUPP = 10V IQ = 100µA VSUPP = 10V
INPUT AND OUTPUT VOLTAGE – VOLTS

6 RL = 100k 6 RL = 100k

INPUT AND OUTPUT VOLTAGE – V

IQ = 1mA CL = 100pF CL = 100pF
TA = -25°C TA = -25°C
4 4

2 2
OUTPUT OUTPUT
0 0

-2 -2

-4 INPUT -4 INPUT

-6 -6
0 2 4 6 8 10 12 0 20 40 60 80 100 120
TIME – µs TIME – µs

VOLTAGE FOLLOWER LARGE

SIGNAL PULSE RESPONSE
8
VSUPP = 10V
6 RL = 1M
INPUT AND OUTPUT VOLTAGE – V

IQ = 10µA CL = 100pF
4 TA = -25°C

2
OUTPUT
0
INPUT
-2

-4

-6
0 200 400 600 800 1000 1200
TIME – µs

www.maximintegrated.com Maxim Integrated │ 20

ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

Detailed Description stage, however, can also be operated in Class AB, which
supplies higher output currents (see the Typical Operating
Quiescent Current Selection Characteristics). The voltage gain decreases and the
The voltage input to the IQ pin of the single and triple output transfer characteristic is non-linear during the
amplifiers selects a quiescent current (IQ) of 10μA, transition from Class A to Class B operation.
100μA, or 1000μA. The dual and quad amplifiers have
The output stage, with a gain that is directly proportional
fixed quiescent current (IQ) settings. Unity-gain band-
to load impedance, approximates a transconductance
width and slew-rate increase with increasing quiescent
amplifier. Approximately the same open-loop gains are
current, as does output sink current capability. The output
obtained at each of the IQ settings if corresponding loads
source current capability is independent of quiescent
of 10kΩ, 100kΩ, and 1MΩ are used.
current.
The maximum output source current is higher than the
The lowest IQ setting that results in sufficient bandwidth
maximum sink current, and is independent of IQ.
and slew rate should be selected for each specific
application. Like most amplifiers, there are output loads for which the
amplifier stability is not guaranteed. In particular, avoid
The IQ pin of the single and triple amplifiers controls the
capacitive loads greater than 100pF; and while on the
quiescent current as follows:
1mA IQ setting, avoid loads less than 5kΩ. Since the
IQ = 10μA IQ pin to V+ output stage is a transconductance output, very large
IQ = 100μA IQ pin between V- + 0.8V and V+ - 0.8V (>10μF) capacitive loads will create a dominant pole and
the output will be stable, even with loads that are less
IQ = 1mA IQ pin to V
than 5kΩ.
Input Offset Nulling
Extended Common-Mode Voltage Range
The input offset can be nulled by connecting a 25kΩ pot (ICL7612/ICL7616)
between the OFFSET terminals with the wiper connected
A common-mode voltage range that includes both V+ and
to V+. At quiescent currents of 1mA and 100μA, the null-
V- is often desirable, especially in single-supply operation.
ing range provided is adequate for all VOS selections.
The ICL7612/ICL7616 extended common-mode range op
However, with higher values of VOS, and an IQ of 10μA,
amps are designed specifically to meet this need. The
nulling may not be possible.
ICL7612 input common-mode voltage range (CMVR)
Frequency Compensation extends beyond both power-supply rails when operated
All of the ICL7611 and ICL7621 series except the ICL7614 with at least 3V total supply and an IQ of 10μA or 100μA.
are internally compensated for unity-gain operation. The The ICL7616 CMVR includes the negative supply voltage
ICL7614 is externally compensated by a capacitor con- (or ground when operated with a single supply) at an IQ
nected between COMP and OUT pins, with 39pF being or 10μA or 100μA.
greater than unity. The compensation capacitor value may PC Board Layout
be reduced to increase the bandwidth and slew rate. The
Careful PC board layout techniques must be used to take
ICL7132 is not compensated and does not have frequen-
full advantage of the very low bias current of the ICL7611
cy compensation pins. Use only at gains 20 at IQ of 1mA;
family. The inputs should be encircled with a low-imped-
at gains > 10 at IQ of 100μA; at gain > 5 at IQ of 10μA.
ance trace, or guard, that is at the same potential as the
Output Loading Considerations inputs. In an inverting amplifier, this is normally ground;
Approximately 70% of the amplifier’s quiescent cur- in a unity-gain buffer connect the guard to the output. A
rent flows in the output stage. The output swing can convenient way of guarding the 8-pin TO-99 version of
approach the supply rails for output loads of 1MΩ, 100kΩ, the ICL7611 is to use a 10-pin circle, with the two extra
and 10kΩ, using the output stage in a highly linear pads on either side of the input pins to provide space for
Class A mode. Crossover distortion is avoided and the a guard ring (see Figure 8). Assembled boards should be
voltage gain is maximized in this mode. The output carefully cleaned, and if a high humidity environment is
expected, conformally coated.

www.maximintegrated.com Maxim Integrated │ 21

ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

Single-Supply Operation Low-Voltage Operation

The ICL7611 family will operate from a single 2V to 16V Operation at VSUPP = ±1.0V is only guaranteed at IQ
power supply. The common-mode voltage range of the = 10μA. Output swings to within a few millivolts of the
standard amplifier types when operated from a single supply rails are achievable for RL (> or =) 1MΩ. Guaranteed
supply is 1.0V to (V+ - 0.6V) at 10μA IQ. At 100μA IQ, the input CMVR is ±0.6V minimum and typically +0.9V to
CMVR is 1.0V to (V+ - 0.8V), and at 1mA IQ, the CMVR is -0.7V at VSUPP = ±1.0V. For applications where greater
1.3V to (V+ - 1.3V). If this CMVR range is insufficient, use common-mode range is desirable, see the description of
the ICL7612, whose CMVR includes both ground and V+, ICL7612 and ICL7616 above.
or the ICL7616, whose CMVR includes ground.
A convenient way to generate a psuedo-ground at V+/2 is Applications Information
to use one op amp of a quad to buffer a V+/2 voltage from Note that in no case is IQ shown. The value of IQ must
a high-impedance resistive divider. be chosen by the designer with regard to frequency
response and power dissipation.

+ + R R3
A1
-

R2
R1 -
R VIN + ICL7612
A3 VOUT
+ VOUT
VIN
+18V R2 -
RL ≥ 10kΩ
25kΩ R3

-
A2
- +

(
GAIN = R3 2R2 +1
R R1 )

Figure 1. Instrumentation Amplifier—Adjust R3 to improve Figure 2. Simple Follower—By using the ICL7612 in these
CMRR. The offset of all three amplifiers is nulled by the offset applications, the circuits will follow rail-to-rail inputs
adjustment of A2.

www.maximintegrated.com Maxim Integrated │ 22

ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

IH5040
+5 +5
1µF
VIN - - +
VOUT
+ TO CMOS OR
100kΩ LPTTL LOGIC ICL7611
-
VOUT
+
1MΩ

Figure 3. Level Detector—By using the ICL7612 in these Figure 4. Photocurrent Integrator—Low-leakage currents allow
applications, the circuits will follow rail-to-rail inputs. integration times up to several hours.

1MΩ
VON
- 1MΩ 0.05µF 10kΩ 2.2MΩ 20kΩ
-
+ VIN
1⁄ 2
+ TO
1⁄ 2
ICL7621 SUCCEEDING
ICL7621 10µF 20kΩ INPUT
+
1MΩ STAGE
-
V- V+ 1⁄ 1.8kΩ = 5%
2
SCALE VOL
ICL7621
DUTY CYCLE ADJUST -
COMMON
+ 1⁄
2
880kΩ ICL7621

Figure 5. Precise Triangle/Square Wave Generator—The Figure 6. Averaging AC to DC Converter—Recommended for

frequency and duty cycle are virtually independent of power Maxim’s ICL7106/ICL7107/ICL7109 A/D Converters.
supply.

+15V

+15V BOTTOM VIEW V+ IOSET

100Ω

10kΩ NOTE 1
OUTPUT 7 8
V+
NOTE 2
IO 6 1
COMP
10kΩ OUT
5 2
V- 4 3
TS
PU
IN

V
NOTES:
GUARD
1. ICL7611, 7612, 7616, 7631, 7632
2. ICL7611, 7612, 7616, 7621, 7622, 7631, 7641, 7642

Figure 7. Burn-In and Life Test Circuit Figure 8. Input Guard for TO-99

www.maximintegrated.com Maxim Integrated │ 23

ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

S/H
CONTROL
INPUT
CINT
1µF

100kΩ
S2 1⁄ RIN
R1 2
S1 ICL7622 VIN -
1⁄
2 A2 VOUT VOUT
ICL7622 +
A1
IH5141

VIN CHOLD

Figure 9. Low Droop Rate Sample and Hold—S2 improves Figure 10. Long-Time Constant Integrator—With RIN = 1011Ω,
accuracy and acquisition time by including the voltage drop the time constant of this integrator is 100,000s. Since the input
across S1 inside the feedback loop. R1 closes the feedback voltage is converted to a current by RIN, the input voltage can
loop of A1 during the hold phase. The droop rate is [IBIAS(AZ) + far exceed the power-supply range.
ILEAK(S1) + ILEAK(S2)]/CHOLD.

CFB - OUTPUT
10MΩ 10MΩ
+
RFB - 1011Ω VIN ICL7611

540pF

+
CURRENT VO = 100mV/pA
5MΩ
SOURCE

270pF 270pF

Figure 11. Pico Ammeter—The response time of this curcuit is Figure 12. 60Hz Twin “T“ Notch Filter—The low 1pA bias
RFB x CFB, where CFB is the stray capacitance between the current of the ICL7611 allows use of small 540pF and 270pF
output and the inverting terminal of the amplifier. capacitors, even with a notch frequency of 60Hz. The 60Hz
rejection is approximately 40dB.

Typical Operating Circuit

CINT

RIN
VIN -
VOUT
+

LONG TIME CONSTANT INTEGRATOR

(Detailed Circuit Diagram — Figure 10)

www.maximintegrated.com Maxim Integrated │ 24

ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

Chip Topographies
ICL7611/12/14/16 ICL7621/22
SINGLE DUAL
0.055”
(1.40mm) 0.083”
(2.11mm)
7 6
NC OR V+ OUT
V+ OUTPUT OUTA B
12 11 12

BIAS/COMP V+ V+
OFFSET
8 13 9
5
0.061” 0.061”
OFFSET OFFSETA OFFSETB
V– (1.55mm) (2.11mm)
1 14 8
4
– INPUT + INPUT
2 3 –INA –INB
1 7

+INA OFFSETA V– OFFSETB +INB

ICL7631/32 2 3 4 3 6
TRIPLE ICL7461/42
0.100” QUAD
(2.54mm)
0.099”
14 13 12 11 (2.51mm)
OUTA +INB -INB IQBSET OUTC –INC OUTB –INB
OUTC +INB
+INC 9 7 6
8 5
15 10
V+
16 V– 9
IQ1SET

2 0.076”
V+ 0.079”
INA (1.93mm) V– (2.01mm)
11 4
+INC 8

3
–INC 7 +INA
+INA
3
OUTB V+ IQCSET –INB OUTD OUTA –INA
–IND
4 5 6 13 14 1 2
12

Package Information
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.

PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO.

TO99 T99-8 21-0022 —
8 PDIP P8-1 21-0043 —
8 SO S8-2 21-0041 90-0096
8 CDIP J16-3 21-0045 —
14 PDIP P14-3 21-0043 —
14 CDIP J14-3 21-0045 —
16 PDIP P16-1 21-0043 —
16 SO S16-1 21-0041 90-0097
16 Wide SO W16-2 21-0042 90-0107

www.maximintegrated.com Maxim Integrated │ 25

ICL761X–ICL764X Single/Dual/Triple/Quad
Operational Amplifiers

Revision History
REVISION REVISION PAGES
DESCRIPTION
NUMBER DATE CHANGED
2 4/08 Removed all part numbers offered in die form from the Ordering Information 2, 11
3 5/10 Corrected letter grades in EC table headings 13–17
Added ICL7621DESA+ part number, temperature range and pin-package to
4 7/21 1, 2, 25, 26
Ordering Information, updated Package Information table.

For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html.

Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.

Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. © 2021 Maxim Integrated Products, Inc. │ 26