SEMICONDUCTOR
3-700
Features
• Wide Operating Voltage Range. . . . . . . . . . ±1V to ±8V
• High Input Impedance . . . . . . . . . . . . . . . . . . . . . .1012Ω
• Input Current Lower Than BIFETs . . . . . . . . .1pA (Typ)
• Output Voltage Swing . . . . . . . . . . . . . . . . . . .V+ and V-
• Available as Duals and Quads (Refer to ICL7611 for
Singles)
• Low Power Replacement for Many Standard Op Amps
Applications
• Portable Instruments
• Telephone Headsets
• Hearing Aid/Microphone Amplifiers
• Meter Amplifiers
• Medical Instruments
• High Impedance Buffers
Description
The ICL761X/762X/764X series is a family of monolithic
CMOS operational amplifiers. These devices provide the
designer with high performance operation at low supply
voltages and selectable quiescent currents. They are an
ideal design tool when ultra low input current and low power
dissipation are desired.
The basic amplifier will operate at supply voltages ranging
from ±1V to ±8V, and may be operated from a single Lithium
cell. The output swing ranges to within a few millivolts of the
supply voltages.
The quiescent supply current of these amplifiers is set to 3
different ranges at the factory. Both amps of the dual
ICL7621 are set to an IQ of 100µA, while each amplifier of
the quad ICL7641 and ICL7642 are set to an IQ of 1mA and
10µA respectively. This results in power consumption as low
as 20µW per amplifier.
Of particular significance is the extremely low (1pA) input
current, input noise current of 0.01pA/√Hz, and 1012Ω input
impedance. These features optimize performance in very
high source impedance applications.
The inputs are internally protected. Outputs are fully
protected against short circuits to ground or to either supply.
A C perf ormance is excellent, with a slew rate of 1.6V/ µs , and
unity gain bandwidth of 1MHz at IQ = 1mA.
Because of the low power dissipation, junction temperature
rise and drift are quite low. Applications utilizing these
features may include stable instruments, extended life
designs, or high density packages.
Pinouts
(See Ordering Information on Next Page)
ICL7621
(PDIP, SOIC)
TOP VIEW
ICL7621
(METAL CAN)
TOP VIEW
ICL7641 (PDIP)
ICL7642 (PDIP)
TOP VIEW
OUTA
-INA
+INA
V-
1
2
3
4
8
7
6
5
V+
OUTB
-INB
+INB
+
-
+
-
V+
-INB
-INA
V-
OUTA
+INA
OUTB
+INB
+
-
+
-
8
7
1
2
345
6
OUTA
-INA
+INA
V+
+INB
-INB
OUTB
OUTD
-IND
+IND
V-
+INC
-INC
OUTC
1
2
3
4
5
6
7
14
13
12
11
10
9
8
+
-
+
-
+
-
+
-
November 1996
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright © Harris Corporation 1996
ICL7621, ICL7641,
ICL7642
Dual/Quad, Low Power
CMOS Operational Amplifiers
File Number 3403.1
3-701
Ordering Information
PART NUMBER TEMP. RANGE (oC) PACKAGE PKG. NO.
ICL7621ACPA 0 to 70 8 Ld PDIP - A Grade - IQ = 100µA E8.3
ICL7621BCPA 0 to 70 8 Ld PDIP - B Grade - IQ = 100µA E8.3
ICL7621DCPA 0 to 70 8 Ld PDIP - D Grade - IQ = 100µA E8.3
ICL7621BCTV 0 to 70 8 Pin Metal Can - B Grade - IQ = 100µA T8.C
ICL7621DCTV 0 to 70 8 Pin Metal Can - D Grade - IQ = 100µA T8.C
ICL7621AMTV -55 to 125 8 Pin Metal Can - A Grade - IQ = 100µA T8.C
ICL7621BMTV -55 to 125 8 Pin Metal Can - B Grade - IQ = 100µA T8.C
ICL7621DMTV -55 to 125 8 Pin Metal Can - D Grade - IQ = 100µA T8.C
ICL7621DCBA 0 to 70 8 Ld SOIC - D Grade - IQ = 100µA M8.15
ICL7621DCBA-T 0 to 70 8 Ld SOIC - D Grade - Tape and Reel - IQ = 100µA M8.15
ICL7641CCPD 0 to 70 14 Ld PDIP - C Grade - IQ = 1mA E14.3
ICL7641ECPD 0 to 70 14 Ld PDIP - E Grade - IQ = 1mA E14.3
ICL7642CCPD 0 to 70 14 Ld PDIP - C Grade - IQ = 10µA E14.3
ICL7642ECPD 0 to 70 14 Ld PDIP - E Grade - IQ = 10µA E14.3
ICL7621, ICL7641, ICL7642
3-702
Absolute Maximum Ratings Thermal Information
Supply Voltage V+ to V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V
Input Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . V- -0.3 to V+ +0.3V
Differential Input Voltage (Note 1). . . . . . . . . .[(V+ +0.3) - (V- -0.3)]V
Duration of Output Short Circuit (Note 2) . . . . . . . . . . . . . . Unlimited
Operating Conditions
Temperature Range
ICL76XXM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55oC to 125oC
ICL76XXC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0oC to 70oC
Thermal Resistance (Typical, Note 3) θJA (oC/W) θJC (oC/W)
SOIC Package. . . . . . . . . . . . . . . . . . . 160 N/A
Metal Can Package . . . . . . . . . . . . . . . 160 75
8 Lead PDIP Package . . . . . . . . . . . . . 120 N/A
14 Lead PDIP Package . . . . . . . . . . . . 80 N/A
Maximum Junction Temperature (Hermetic Packages) . . . . . . . 175oC
Maximum Junction Temperature (Plastic Package) . . . . . . . . 150oC
Maximum Storage Temperature Range . . . . . . . . .. -65oC to 150oC
Maximum Lead Temperature (Soldering 10s). . . . . . . . . . . . 300oC
(SOIC - Lead Tips Only)
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES:
1. Long term offset voltage stability will be degraded if large input differential voltages are applied for long periods of time.
2. The outputs may be shorted to ground or to either supply, for VSUPPLY ≤10V. Care must be taken to insure that the dissipation rating is
not exceeded.
3. θJA is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications VSUPPLY = ±5V, Unless Otherwise Specified
PARAMETER SYMBOL TEST
CONDITIONS TEMP.
(oC)
ICL7621A ICL7621B ICL7621D
UNITSMIN TYP MAX MIN TYP MAX MIN TYP MAX
Input Offset
Voltage VOS RS≤ 100kΩ25 - - 2 - - 5 - - 15 mV
Full - - 3 - - 7 - - 20 mV
Temperature
Coefficient of VOS ∆VOS/∆TR
S
≤ 100kΩ- - 10 - - 15 - - 25 - µV/oC
Input Offset Current IOS 25 - 0.5 30 - 0.5 30 - 0.5 30 pA
0 to 70 - - 300 - - 300 - - 300 pA
-55 to 125 - - 800 - 800 - 800 pA
Input Bias
Current IBIAS 25 - 1.0 50 - 1.0 50 - 1.0 50 pA
0 to 70 - - 400 - - 400 - - 400 pA
-55 to 125 - - 4000 - - 4000 - - 4000 pA
Common Mode
Voltage Range VCMR IQ = 100µA25±4.2 - - ±4.2 - - ±4.2 - - V
Output Voltage Swing VOUT IQ = 100µA,
RL = 100kΩ, 25 ±4.9 - - ±4.9 - - ±4.9 - - V
0 to 70 ±4.8 - - ±4.8 - - ±4.8 - - V
-55 to 125 ±4.5 - - ±4.5 - - ±4.5 - - V
Large Signal
Voltage Gain AVOL VO = ±4.0V,
RL = 100kΩ,
IQ = 100µA
25 86 102 - 80 102 - 80 102 - dB
0 to 70 80 - - 75 - - 75 - - dB
-55 to 125 74 - - 68 - - 68 - - dB
Unity Gain
Bandwidth GBW IQ = 100µA 25 - 0.48 - - 0.48 - - 0.48 - MHz
Input Resistance RIN 25 - 1012 --10
12 --10
12 -Ω
Common Mode
Rejection Ratio CMRR RS≤ 100kΩ,
IQ = 100µA25 76 91 - 70 91 - 70 91 - dB
Power Supply
Rejection Ratio
(VSUPPLY = ±8V to ±2V)
PSRR RS≤ 100kΩ,
IQ = 100µA25 80 86 - 80 86 - 80 86 - dB
Input Referred Noise
Voltage eNRS = 100Ω,
f = 1kHz 25 - 100 - - 100 - - 100 - nV/√Hz
ICL7621, ICL7641, ICL7642
3-703
Input Referred Noise
Current iNRS = 100Ω,
f = 1kHz 25 - 0.01 - - 0.01 - - 0.01 - pA/√Hz
Supply Current
(Per Amplifier) ISUPPLY No Signal, No Load,
IQ = 100µA25 - 0.1 0.25 - 0.1 0.25 - 0.1 0.25 mA
Channel
Separation VO1/VO2 AV = 100 25 - 120 - - 120 - - 120 - dB
Slew Rate SR AV = 1, CL = 100pF
VIN = 8VP-P,
IQ = 100µA,
RL = 100kΩ
25 - 0.16 - - 0.16 - - 0.16 - V/µs
Rise Time tRVIN = 50mV,
CL = 100pF
IQ = 100µA,
RL = 100kΩ
25 - 2 - - 2 - - 2 - µs
Overshoot
Factor OS VIN = 50mV,
CL = 100pF
IQ = 100µA,
RL = 100kΩ
25 -10- -10- - 10 - %
Electrical Specifications VSUPPLY = ±5V, Unless Otherwise Specified (Continued)
PARAMETER SYMBOL TEST
CONDITIONS TEMP.
(oC)
ICL7621A ICL7621B ICL7621D
UNITSMIN TYP MAX MIN TYP MAX MIN TYP MAX
Electrical Specifications VSUPPLY = ±5V, Unless Otherwise Specified
PARAMETER SYMBOL TEST
CONDITIONS TEMP.
(oC)
ICL7641C, ICL7642C ICL7641E, ICL7642E
UNITSMIN TYP MAX MIN TYP MAX
Input Offset Voltage VOS RS≤ 100kΩ25 - - 10 - - 20 mV
Full - - 15 - - 25 mV
Temperature Coefficient
of VOS ∆VOS/∆TR
S
≤ 100kΩ- - 20 - - 30 - µV/oC
Input Offset Current IOS 25 - 0.5 30 - 0.5 30 pA
0 to 70 - - 300 - - 300 pA
-55 to 125 - - 800 - 800 pA
Input Bias Current IBIAS 25 - 1.0 50 - 1.0 50 pA
0 to 70 - - 500 - - 500 pA
-55 to 125 - - 4000 - - 4000 pA
Common Mode Voltage
Range VCMR IQ = 10µA, ICL7642 25 ±4.4 - - ±4.4 - - V
IQ = 1mA, ICL7641 25 ±3.7 - - ±3.7 - - V
Output Voltage Swing VOUT ICL7642, IQ = 10µA,
RL = 1MΩ25 ±4.9 - - ±4.9 - - V
0 to 70 ±4.8 - - ±4.8 - - V
-55 to 125 ±4.7 - - ±4.7 - - V
ICL7641, IQ = 1mA,
RL = 10kΩ25 ±4.5 - - ±4.5 - - V
0 to 70 ±4.3 - - ±4.3 - - V
-55 to 125 ±4.0 - - ±4.0 - - V
ICL7621, ICL7641, ICL7642
3-704
Large Signal Voltage
Gain AVOL ICL7642, V O = ±4V,
RL = 1MΩ, IQ=10µA25 80 104 - 80 104 - dB
0 to 70 75 - - 75 - - dB
-55 to 125 68 - - 68 - - dB
ICL7641, VO = ±4V,
RL = 10kΩ, IQ = 1mA 25 76 98 - 76 98 - dB
0 to 70 72 - - 72 - - dB
-55 to 125 68 - - 68 - - dB
Unity Gain Bandwidth GBW ICL 7642, IQ = 10µA 25 - 0.044 - - 0.044 - MHz
ICL 7641, IQ = 1mA 25 - 1.4 - - 1.4 - MHz
Input Resistance RIN 25 - 1012 --10
12 -Ω
Common Mode
Rejection Ratio CMRR ICL7642, RS≤100kΩ, IQ=10µA 25 70 96 - 70 96 - dB
ICL7641, RS≤100kΩ, IQ = 1mA 25 60 87 - 60 87 - dB
Pow er Supply Rejection
Ratio (VSUPPLY = ±8V to
±2V)
PSRR ICL7642, RS≤ 100kΩ, IQ = 10µA 25 80 94 - 80 94 - dB
ICL7641, RS≤ 100kΩ, IQ = 1mA 25 70 77 - 70 77 - dB
Input Referred Noise
Voltage eNRS = 100Ω, f = 1kHz 25 - 100 - - 100 - nV/√Hz
Input Referred Noise
Current iNRS = 100Ω, f = 1kHz 25 - 0.01 - - 0.01 - pA/√Hz
Supply Current
(Per Amplifier)
(No Signal, No Load)
ISUPPLY ICL7642, IQ = 10µA Low Bias 25 - 0.01 0.03 - 0.01 0.03 mA
ICL7641, IQ = 1mA High Bias 25 - 1.0 2.5 - 1.0 2.5 mA
Channel Separation VO1/VO2 AV = 100 25 - 120 - - 120 - dB
Slew Rate
(AV = 1, CL = 100pF,
VIN = 8VP-P)
SR ICL7642, IQ = 10µA, R L = 1MΩ25 - 0.016 - - 0.016 - V/µs
ICL7641, IQ = 1mA, R L = 10kΩ25 - 1.6 - - 1.6 - V/µs
Rise Time
(VIN = 50mV, CL = 100pF) tRICL7642, IQ = 10µA, RL = 1MΩ25 - 20 - - 20 - µs
ICL7641, IQ = 1mA, R L = 10kΩ25 - 0.9 - - 0.9 - µs
Overshoot Factor
(VIN = 50mV, CL = 100pF) OS ICL7642, IQ = 10µA, RL = 1M Ω25 - 5 - - 5 - %
ICL7641, IQ = 1mA, R L = 10kΩ25 - 40 - - 40 - %
Electrical Specifications VSUPPLY = ±5V, Unless Otherwise Specified (Continued)
PARAMETER SYMBOL TEST
CONDITIONS TEMP.
(oC)
ICL7641C, ICL7642C ICL7641E, ICL7642E
UNITSMIN TYP MAX MIN TYP MAX
Electrical Specifications VSUPPLY = ±1V, IQ = 10µA, Unless Otherwise Specified
PARAMETERS SYMBOL TEST
CONDITIONS TEMP.
(oC)
ICL7642C
UNITSMIN TYP MAX
Input Offset Voltage VOS RS≤ 100kΩ25 - - 10 mV
Full - - 12 mV
Temperature Coefficient of VOS ∆VOS/∆TR
S
≤ 100kΩ- - 20 - µV/oC
Input Offset Current IOS 25 - 0.5 30 pA
0 to 70 - - 300 pA
Input Bias Current IBIAS 25 - 1.0 50 pA
0 to 70 - - 500 pA
Common Mode Voltage Range VCMR 25 ±0.6 - - V
ICL7621, ICL7641, ICL7642
3-705
Schematic Diagram
Output Voltage Swing VOUT RL = 1MΩ25 - ±0.98 - V
0 to 70 - ±0.96 - V
Large Signal Voltage Gain AVOL VO = ±0.1V,
RL = 1MΩ25 - 90 - dB
0 to 70 - 80 - dB
Unity Gain Bandwidth GBW 25 - 0.044 - MHz
Input Resistance RIN 25 - 1012 -Ω
Common Mode Rejection Ratio CMRR RS≤ 100kΩ25 - 80 - dB
Power Supply Rejection Ratio PSRR 25 - 80 - dB
Input Referred Noise Voltage eNRS = 100Ω, f = 1kHz 25 - 100 - nV/√Hz
Input Referred Noise Current iNRS = 100Ω, f = 1kHz 25 - 0.01 - pA/√Hz
Supply Current (Per Amplifier) ISUPPLY No Signal, No Load 25 - 6 15 µA
Channel Separation VO1/VO2 AV = 100 25 - 120 - dB
Slew Rate SR AV = 1, CL = 100pF, VIN = 0.2VP-P, RL = 1MΩ25 - 0.016 - V/µs
Rise Time tRVIN = 50mV, CL = 100pF RL = 1MΩ25 - 20 - µs
Overshoot Factor OS VIN = 50mV, CL = 100pF, RL = 1MΩ25 - 5 - %
Electrical Specifications VSUPPLY = ±1V, IQ = 10µA, Unless Otherwise Specified (Continued)
PARAMETERS SYMBOL TEST
CONDITIONS TEMP.
(oC)
ICL7642C
UNITSMIN TYP MAX
INPUT STAGE SETTING STAGE
IQOUTPUT STAGE
V+
OUTPUT
V-
QN11
QN10
QN9
CFF = 9pF
CC = 33pF
QP9
QP8
QP7
QP6
6.3V
QN7
QN6
QN5
QN4
QN8
QN3
QN1 QN2
QP1 QP2
3K3K
100K
900K
QP5
QP4
QP3
+INPUT
-INPUT
V-
V-
V+
V+
A
C
V-
G
E
V+
TABLE OF JUMPERS IQ
ICL7621 C, E 100µA
ICL7641 C, G 1mA
ICL7642 A, E 10µA
6.3V
ICL7621, ICL7641, ICL7642
3-706
Application Information
Static Protection
All devices are static protected by the use of input diodes.
However, strong static fields should be avoided, as it is
possible for the strong fields to cause degraded diode
junction characteristics, which may result in increased input
leakage currents.
Latchup Avoidance
Junction-isolated CMOS circuits employ configurations
which produce a parasitic 4-layer (PNPN) structure. The 4-
layer structure has characteristics similar to an SCR, and
under certain circumstances may be triggered into a low
impedance state resulting in excessive supply current. To
avoid this condition, no voltage g reater than 0.3V beyond the
supply rails may be applied to any pin. In general, the op
amp supplies must be established simultaneously with, or
before any input signals are applied. If this is not possible,
the drive circuits must limit input current flow to 2mA to
prevent latchup.
Choosing the Proper IQ
Each device in the ICL76XX family has a similar IQ setup
scheme, which allows the amplifier to be set to nominal
quiescent currents of 10µA, 100µA or 1mA. These current
settings change only very slightly over the entire supply
voltage range. The ICL7611/12 have an external IQ control
terminal, permitting user selection of each amplifiers’
quiescent current. The ICL7621 and ICL7641/7642 have
fixed IQ settings:
ICL7621 (Dual) - IQ = 100µA
ICL7641 (Quad) - IQ = 1mA
ICL7642 (Quad) - IQ = 10µA
NOTE: The output current available is a function of the qui-
escent current setting. For maximum peak-to-peak output
voltage swings into low impedance loads, IQ of 1mA should
be selected.
Output Stage and Load Driving Considerations
Each amplifiers’ quiescent current flows primarily in the out-
put stage. This is approximately 70% of the IQ settings. This
allows output swings to almost the supply rails for output
loads of 1MΩ, 100kΩ, and 10kΩ, using the output stage in a
highly linear class A mode. In this mode, crosso ver distortion
is avoided and the voltage gain is maximized. However, the
output stage can also be operated in Class AB for higher
output currents. (See graphs under Typical Operating Char-
acteristics). During the transition from Class A to Class B
operation, the output transfer characteristic is non-linear and
the voltage gain decreases.
Frequency Compensation
The ICL76XX are internally compensated, and are stable for
closed loop gains as low as unity with capacitive loads up to
100pF.
Operation At VSUPPLY = ±1V
Operation at VSUPPLY = ±1V is guaranteed for the
ICL7642C only.
Output swings to within a few millivolts of the supply rails are
achievable for RL≥ 1MΩ. Guaranteed input CMVR is ±0.6V
minimum and typically +0.9V to -0.7V at VSUPPLY = ±1V. For
applications where greater common mode range is
desirable, refer to the ICL7612 data sheet.
Typical Applications
The user is cautioned that, due to extremely high input
impedances, care must be exercised in layout, construction,
board cleanliness, and supply filtering to avoid hum and
noise pickup.
Note that in no case is IQ shown. The value of IQ must be
chosen by the designer with regard to frequency response
and power dissipation.
ICL76XX
+
-
VIN VOUT
RL≥ 10kΩ
FIGURE 1. SIMPLE FOLLOWER
ICL76XX
+
-
VIN VOUT
100kΩ
+5 +5
1MΩ
TO CMOS OR
LPTTL LOGIC
FIGURE 2. LEVEL DETECTOR
ICL7621, ICL7641, ICL7642
3-707
FIGURE 3. PHOTOCURRENT INTEGRATOR FIGURE 4. TRIANGLE/SQUARE WAVE GENERATOR
FIGURE 5. AVERAGING AC T O DC CONVER TER FOR A/D
CONVERTERS SUCH AS ICL7106, ICL7107,
ICL7109, ICL7116, ICL7117
FIGURE 6. BURN-IN AND LIFE TEST CIRCUIT
FIGURE 7. FIFTH ORDER CHEBYCHEV MULTIPLE FEEDBACK LOW PASS FILTER
VOUT
1µF
ICL76XX
+
-
+
λ
NOTE: Low leakage currents allow integration times up to
several hours.
1MΩ
+
-
1MΩ
DUTY CYCLE
V- V+
680kΩ
1MΩ
WAVEFORM GENERATOR
+
-
1/2
ICL7621 1/2
ICL7621
NOTE: Since the output range s wings e xactly from rail to r ail, fre-
quency and duty cycle are virtually independent of pow er supply
variations.
10µF
1/2
+
-
20kΩ
VIN
20kΩ
VOH
VOL
1MΩ
2.2MΩ
COMMON
10kΩ
0.5µF
1.8k = 5%
SCALE
ADJUST
TO
SUCCEEDING
INPUT
STAGE
+
-
ICL7621
1/2
ICL7621
+
-V-
OUT
V+
V+
-8V
+8V
TA = 125oC
+
-
+
-
INPUT
30kΩ160kΩ
0.2µF0.2µF
0.2µF
0.2µF 0.1µF0.1µF
51kΩ100kΩ680kΩ
360kΩ
360kΩ
1MΩ
1MΩ
OUTPUT
1/2
ICL7621 1/2
ICL7621
NOTE 4 NOTE 4
NOTES:
4. Small capacitors (25 - 50pF) may be needed for stability in some cases.
5. The low bias currents permit high resistance and low capacitance values to be used to achiev e lo w frequency cutoff.
fC = 10Hz, AVCL = 4, Passband ripple = 0.1dB.
ICL7621, ICL7641, ICL7642
3-708
Typical Performance Curves
FIGURE 8. SUPPLY CURRENT PER AMPLIFIER vs SUPPLY
VOLTAGE FIGURE 9. SUPPLY CURRENT PER AMPLIFIER vs FREE-AIR
TEMPERATURE
FIGURE 10. INPUT BIAS CURRENT vs TEMPERATURE FIGURE 11. LARGE SIGNAL DIFFERENTIAL V OL T A GE GAIN vs
FREE-AIR TEMPERATURE
FIGURE 12. LARGE SIGNAL FREQUENCY RESPONSE FIGURE 13. COMMON MODE REJECTION RATIO vs FREE-AIR
TEMPERATURE
10K
1K
100
10
1
SUPPLY CURRENT (µA)
0246810121416
SUPPLY VOLTAGE (V)
TA = 25oC
NO LOAD
NO SIGNAL IQ = 1mA
IQ = 100µA
IQ = 1mAIQ = 10µA
104
103
102
10
1
SUPPLY CURRENT (µA)
-50 -25 0 25 50 75 100 125
FREE-AIR TEMPERATURE (oC)
V+ - V- = 10V
NO LOAD
NO SIGNAL IQ = 1mA
IQ = 100µA
IQ = 10µA
-50 -25 0 25 50 75 100 125
FREE-AIR TEMPERATURE (oC)
1000
100
10
1.0
0.1
INPUT BIAS CURRENT (pA)
VS = ±5V
-50 -25 0 25 50 75 100 125
FREE-AIR TEMPERATURE (oC)
-75
1000
100
10
1
DIFFERENTIAL VOLTAGE GAIN (kV/V)
VSUPPLY = 10V
VOUT = 8V
RL = 100kΩ
IQ = 100µARL = 10kΩ
IQ = 1mA
RL = 1MΩ
IQ = 10µA
107
106
104
103
102
10
1
105
DIFFERENTIAL VOLTAGE GAIN (V/V)
0.1 1.0 10 100 1K 10K 100K 1M
FREQUENCY (Hz)
TA = 25oC
VSUPPLY = 15V
0
45
90
135
180
PHASE SHIFT (DEGREES)
IQ = 1mA
IQ = 100µA
PHASE SHIFT
(IQ = 1mA)
IQ = 10µA
-50 -25 0 25 50 75 100 125
FREE-AIR TEMPERATURE (oC)
-75
105
100
95
90
85
80
75
70
COMMON MODE REJECTION RATIO (dB)
VSUPPLY = 10V
IQ = 10µA
IQ = 100µA
IQ = 1mA
ICL7621, ICL7641, ICL7642
3-709
FIGURE 14. PO WER SUPPLY REJECTION RATIO vs FREE-AIR
TEMPERATURE FIGURE 15. EQUIVALENT INPUT NOISE VOLTAGE vs
FREQUENCY
FIGURE 16. OUTPUT VOLTAGE vs FREQUENCY FIGURE 17. OUTPUT VOLTAGE vs FREQUENCY
FIGURE 18. OUTPUT VOLTAGE vs SUPPLY VOLTAGE FIGURE 19. OUTPUT VOLTAGE vs FREE-AIR TEMPERATURE
Typical Performance Curves
(Continued)
100
95
90
85
80
75
70
65
SUPPLY VOLTAGE REJECTION RATIO (dB)
-50 -25 0 25 50 75 100 125-75 FREE-AIR TEMPERATURE (oC)
IQ = 1mA
IQ = 100µA
IQ = 10µA
VSUPPLY = 10V 600
500
400
300
200
100
0
EQUIVALENT INPUT NOISE VOLTAGE (nV/√Hz)
10 100 1K 10K 100K
FREQUENCY (Hz)
TA = 25oC
3V ≤ VSUPPLY ≤ 16V
16
14
12
10
8
6
4
2
0
MAXIMUM PEAK-TO-PEAK
OUTPUT VOLTAGE (VP-P)
100 1K 10K 100K 1M 10M
FREQUENCY (Hz)
VSUPPLY
= ±8V
VSUPPLY
= ±5V
VSUPPLY
= ±2V
IQ = 1mA
IQ = 10µA
IQ = 100µA
TA = 25oCVSUPPLY = 10V
IQ = 1mA
16
14
12
10
8
6
4
2
0
MAXIMUM PEAK-TO-PEAK
OUTPUT VOLTAGE (VP-P)
10K 100K 1M 10M
FREQUENCY (Hz)
TA = -55oC
TA = 25oC
TA = 125oC
16
14
12
10
8
6
4
MAXIMUM PEAK-TO-PEAK
OUTPUT VOLTAGE (VP-P)
2 4 6 8 10 12 14 16
SUPPLY VOLTAGE (V)
TA = 25oC
RL = 100kΩ - 1MΩ
RL = 10kΩ
12
10
8
6
4
2
0
MAXIMUM PEAK-TO-PEAK
OUTPUT VOLTAGE (VP-P)
-75 -50 -25 0 25 50 75 100 125
FREE-AIR TEMPERATURE (oC)
RL = 100kΩ
RL = 10kΩ
RL = 2kΩ
VSUPPLY = 10V
IQ = 1mA
ICL7621, ICL7641, ICL7642
3-710
FIGURE 20. OUTPUT SOURCE CURRENT vs SUPPLY VOLTAGE FIGURE 21. OUTPUT SINK CURRENT vs SUPPLY VOLTAGE
FIGURE 22. OUTPUT VOLTAGE vs LOAD RESISTANCE FIGURE 23. VOLTAGE FOLLOWER LARGE SIGNAL PULSE
RESPONSE (IQ = 1mA)
FIGURE 24. V OLTA GE FOLLO WER LARGE SIGNAL PULSE
RESPONSE (IQ = 100µA) FIGURE 25. V OLTA GE FOLLO WER LARGE SIGNAL PULSE
RESPONSE (IQ = 10µA)
Typical Performance Curves
(Continued)
40
30
20
10
0
MAXIMUM OUTPUT SOURCE CURRENT (mA)
0246810121416
SUPPLY VOLTAGE (V)
IQ = 1mA
0.01
0.1
1.0
10
MAXIMUM OUTPUT SINK CURRENT (mA)
0246810121416
SUPPLY VOLTAGE (V)
IQ = 10µA
IQ = 100µA
IQ = 1mA
16
14
12
10
8
6
4
2
0
MAXIMUM PEAK-TO-PEAK
OUTPUT VOLTAGE (VP-P)
0.1 1.0 10 100
LOAD RESISTANCE (kΩ)
V+ - V- = 10V
IQ = 1mA
TA = 25oC8
6
4
2
0
-2
-4
-6
INPUT AND OUTPUT VOLTAGE (V)
024681012
TIME (µs)
TA = 25oC, VSUPPLY = 10V
RL = 10kΩ, CL = 100pF
OUTPUT
INPUT
8
6
4
2
0
-2
-4
-6
INPUT AND OUTPUT VOLTAGE (V)
0 20 40 60 80 100 120
TIME (µs)
TA = 25oC, VSUPPLY = 10V
RL = 100kΩ, CL = 100pF
OUTPUT
INPUT
8
6
4
2
0
-2
-4
-6
INPUT AND OUTPUT VOLTAGE (V)
0 200 400 600 800 1000 1200
TIME (µs)
TA = 25oC, VSUPPLY = 10V
RL = 1MΩ, CL = 100pF
OUTPUT
INPUT
ICL7621, ICL7641, ICL7642
