Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
Advanced AMSOP-77
Monolithic ULTRA LOW OFFSET VOLTAGE OPERATIONAL AMPLIFIER
Systems
FEATURES APPLICATIONS
•• Outstanding Linearity •• High-Gain Instrumentation
•• Low VOS overTemperature.…………………. 55µµV Max •• Precision Data Acquisition
•• Excellent VOS Drift………………………. 0.6µµV/°°C Max •• Precision Integrators
•• Ultra High Gain………………………….5000V/mV Min •• Precision Threshold Detectors
•• High PSRR……………………………………3µµV/V Max •• Biomedical Amplifiers
•• Low Power Consumption…………………….60mW Max
GENERAL DESCRIPTION
The AMSOP-77 is a precision operational amplifier with an ultra low input offset voltage. This device features a wide input
voltage range of ±13V minimum, low input bias current, high impedance, high PSRR, high CMRR, excellent stability of
offsets and gain over time and temperature. Exceptional gain linearity eliminates incorrectable system nonlinearities common
in previous monolithic op amps, and provides superior performance in high closed-loop gain applications.
Low cost, low noise, low offsets and high open-loop gain make the AMSOP-77 an excellent choice particularly for high-gain
instrumentation applications. Other applications include precision data acquisition, precision integrators, threshold detectors
and medical instrumentation.
The AMSOP-77 is operational in the commercial temperature range of 0°C to 70°C and is available in the 8 lead SOIC and
plastic dip (PDIP) packages.
ORDERING INFORMATION:
TOL. PACKAGE TYPE OPERATING
8 LEAD SOIC 8 LEAD PDIP TEMPERATURE RANGE
±25µV AMSOP-77ES AMSOP-77EP 0 to 70° C
±60µV AMSOP-77FS AMSOP-77FP 0 to 70° C
±100µV AMSOP-77GS AMSOP-77GP 0 to 70° C
PIN CONNECTIONS
8 Lead SOIC/ 8Lead PDIP
Top View
1
2
8
4
3
7
5
6OUT
N/C
V+
VOS TRIM
-IN
+IN
VOS TRIM
V-
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMSOP-77
ABSOLUTE MAXIMUM RATINGS (Note1)
Supply Voltage ±22V Storage temperature -65°C to +125°C
Differential Input Voltage ±30V Junction Temperature +150°C
Input Voltage ±22V Soldering information (60 sec) 300°C
Output Short Circuit Duration Indefinite Thermal Resistance
Operating Temperature Range 0°C to70°C 8 L SOIC 158°C/W
8 L PDIP 103°C/W
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at VIN =±15V and TA = +25°C unless otherwise specified.
Parameter Conditions AMSOP-77E AMSOP-77F AMSOP-77G Units
Min Typ Max Min Typ Max Min Typ Max
Input Offset Voltage 10 25 20 60 50 100 µV
Long Term VOS
Stability (Note 2) 0.3 0.4 0.4 µV/Mo
Input Offset Current 0.3 1.5 0.3 2.8 0.3 2.8 nA
Input Bias Current -0.2 1.2 2.0 -0.2 1.2 2.8 -0.2 1.2 2.8 nA
Input Noise Voltage 0.1Hz to 10Hz 0.35 0.6 0.38 0.65 0.38 0.65 µVP-P
Input Noise Voltage
Density fO = 10Hz
fO = 100Hz (Note 3)
fO = 1000Hz
10.3
10.0
9.6
18.0
13.0
11.0
10.5
10.2
9.8
20.0
13.5
11.5
10.5
10.3
9.8
20.0
13.5
11.5 nV/√Hz
Input Noise Current 0.1Hz to 10Hz 14 30 15 35 15 35 pAP-P
Input Noise Current
Density fO = 10Hz
fO = 100Hz (Note 3)
fO = 1000Hz
0.32
0.14
0.12
0.80
0.23
0.17
0.35
0.15
0.13
0.90
0.27
0.18
0.35
0.15
0.13
0.90
0.27
0.18 pA/√Hz
Input Resistance
Differential-Mode (Note 4) 26 45 18.5 45 18.5 45 MΩ
Input Resistance
Common-Mode 200 200 200 GΩ
Input Voltage Range ± 13 ± 14 ± 13 ± 14 ± 13 ± 14 V
Common-Mode
Rejection Ratio VCM = ± 13 0.1 1.0 0.1 1.6 0.1 1.6 µV/V
Power Supply
Rejection Ratio VS = ± 13 to ± 18 0.7 3.0 0.7 3.0 0.7 3.0 µV/V
Large-Signal
Voltage Gain RL≥2kΩ, VO =± 10V 5000 12000 2000 6000 2000 6000 V/mV
Output Voltage
Swing RL ≥10kΩ
RL ≥2kΩ
RL ≥1kΩ
± 13.5
± 12.5
± 12.0
± 14.0
± 13.0
± 12.5
± 13.5
± 12.5
± 12.0
± 14.0
± 13.0
± 12.5
± 13.5
± 12.5
± 12.0
± 14.0
± 13.0
± 12.5
V
Slew Rate RL ≥2kΩ (Note 3) 0.1 0.3 0.1 0.3 0.1 0.3 V/µs
Closed-Loop
Bandwidth AVCL =+1
(Note 3) 0.4 0.6 0.4 0.6 0.4 0.6 MHz
Open-Loop Output
Resistance VO = 0, IO= 0 60 60 60 Ω
Power Consumption VS =± 15V, No Load
VS =± 3V, No Load
50
3.5 60
4.5 50
3.5 60
4.5 50
3.5 60
4.5 mW
Offset Adjustment
Range RP =20kΩ± 3 ± 3 ± 3 mV
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMSOP-77
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at VIN= ±15, 0°C ≤ TA ≤ +70°C unless otherwise specified.
Parameter Conditions AMSOP-77E AMSOP-77F AMSOP-77G Units
Min Typ Max Min Typ Max Min Typ Max
Input Offset Voltage 10 55 20 100 80 150 µV
Average Input Offset
Voltage Drift (Note 3) 0.3 0.6 0.4 1.0 0.7 1.2 µV/°C
Input Offset Current 0.5 2.2 0.5 4.5 0.5 4.5 nA
Average Input Offset
Current Drift (Note 5) 1.5 40 1.5 85 1.5 85 pA/°C
Input Bias Current -0.2 2.4 4.0 -0.2 2.4 6.0 -0.2 2.4 6.0 nA
Average Input Bias
Current Drift (Note 5) 8 40 15 60 15 60 pA/°C
Input Voltage Range ± 13.0 ± 13.5 ± 13.0 ± 13.5 ± 13.0 ± 13.5 V
Common-Mode
Rejection Ratio VCM = ± 13 0.1 1.0 0.1 3.0 0.1 3.0 µV/V
Power Supply
Rejection Ratio VS = ± 13 to ± 18 1.0 3.0 1.0 5.0 1.0 5.0 µV/V
Large-Signal
Voltage Gain RL≥2kΩ, VO =± 10V 2000 6000 1000 4000 1000 4000 V/mV
Output Voltage
Swing RL ≥2kΩ± 12.0 ± 13.0 ± 12.0 ± 13.0 ± 12.0 ± 13.0 V
Power Consumption VS = ± 15V, No Load 60 75 60 75 60 75 mW
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The
guaranteed specifications apply only for the test conditions listed.
Note 2: Long-Term Input Offset Voltage Stability refers to the averaged trend line of VOS vs. Time over extended periods after the first 30 days of operation.
Excluding the initial hour of operation, changes in VOS during the first 30 operating days are typically 2.5µV. Parameter is sample tested.
Note 3: Sample tested
Note 4: Guaranteed by design.
Note 5: Guaranteed by end-point limits.
TYPICAL PERFORMANCE CHARACTERISTICS
Input Bias Current vs
Differrential Input Voltage
DIFFERENTIAL INPUT VALUE (V)
NONINVERTING INPUT BIAS
CURRENT (mA)
VS = ±15V
-30 -20 -10 0 10 20 30
AT | VDIFF | ≤ 1.0V, | IB | ≤ 7nA (OP-07C)
0 40
25
10
85
OPEN-LOOP GAIN (V/µV)
Open-Loop Gain vs Temperature
TEMPERATURE (° C)
15
5
-40
0-30
-20
-10
0
10
20
30 -30
-20
-10
0
10
20
30
INVERTING INPUT BIAS
20
1.5 2
4
-1
3.5
ABSOLUTE CHANGE IN INPUT
OFFSET VOLTAGE (µV)
Warm-UpDrift
TIME AFTER POWER SUPPLY TURN-ON (minutes)
1
-2
0.5
-4
2
VS = ±15V VS = ±15V
02.5
TA = 25° C
TA = 25° C
1 3
-3
0
3
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMSOP-77
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
0
1
4
-50 0 50 100
TEMPERATURE (° C)
Input Bias Current vs Temperature
INPUT BIAS CURRENT (nA)
2
3
FREQUENCY (Hz)
PEAK-TO-PEAK AMPLITUEDE (V)
0
32
Maximum Output Swing vs
Frequency
16
12
4
100k 1M
1k 10k
8
24
20
0±10 ±15
16
±20
OPEN-LOOP GAIN (V/µV)
Open-Loop Gain vs Power
Supply Voltage
POWER SUPPLY VOLTAGE (V)
8
4
±5
00
0.5
1.0
2.0
-50 0 50 100
TEMPERATURE (° C)
Input Offset Current vs Temperature
INPUT OFFSET CURRENT (nA)
1.5
-40
0
120
0 1 10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
Open-Loop Frequency Response
OPEN-LOOP GAIN (dB)
40
80
0
5
20
100 1k 10k
LOAD RESISTANCE TO GROUND (Ω)
Maximum Output Voltage vs
Load Resistance
MAXIMUM OUTPUT VOLTAGE (V)
10
15
12
0 50
85
100
ABSOLUTE VALUE OF OFFSET
VOLTAGE (µV)
Untrimmed Offset Voltage vs
Temperature
TEMPERATURE (° C)
50
25
-50
0
75
15
20
40
0 1 2 3 4
TIME FROM OUTPUT BEING SHORTED (minutes)
Output Short-Circuit Current vs
Time
OUTPUT SHORT-CIRCUIT
CURRENT (mA)
25
30
VS = ±15V VS = ±15V TA = 25° C
VS = ±15V
TA = 25° C
VS = ±15V
TA = 25° C
VS = ±15V
TA = 25° C
VS = ±15V
RS = 100Ω
VIN = ±10mV POSITIVE SWING
NEGATIVE SWING
OP-77G
OP-77E
RL = 2kΩ
28
VS = ±15V
TA = 25° C
35
OP-77F
+ISC
- ISC
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMSOP-77
TYPICAL APPLICATIONS
Precision High-Gain Differential Amplifier
TYPE AMOUNT
COMMON-MODE VOLTAGE 0.01%/V
GAIN LINEARITY, WORST CASE 0.02%
TCVOS 0.008%/°C
TCIOS 0.008%/°C
Bilateral Current Source
Basic Current Source 100mA current Source
These current sources will supply both positive and negative current into a grounded load.
Note that
R1
R3
R2
R4R5
1
R2
R4
R5
ZO−
+
+
= and that for ZO to be indefinite, R1
R3
must
R2R4R5 =
+.
OP-77E
+
-
R2
1kΩ
0.1µF
-15V
+15V
1kΩR4
1MΩ
4
6
7
2
3
0.1µF
1MΩ
R3
R1 The high gain, gain linearity, CMRR, low TCVOS of the OP-77 make
it possible to obtain performance not previously available in single
stage very high-gain amplifier applications.
For the best CMR, R4
R3
equalmust
R2
1R. In this example, with a
10mV differential signal, the maximum errors are as listed.
OP-77
+
-
1kΩ
100kΩ
IOUT ≤ 15mA
100kΩ
990Ω
6
2
3
R4
R5
10Ω
R3
R1
R2
VIN
OP-77
+
-
IOUT ≤ 100mA
6
2
3
R4
R5
R3
R1
R2
VIN 50Ω
-15V
2N2907
2N2222
+15V
R5*R1
R3
V IINOUT =
GIVEN R3= R4+R5, R1=R2
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMSOP-77
TYPICAL APPLICATIONS (Continued)
Precision Current Sinks
Positive Current Sink Positive current Source
These simple high current sinks require that the load float between the power
supply and the sink. In these circuits, OP-77’s high gain, high CMRR, and low
TCVOS assure high accuracy.
Precision Absolute Value Amplifier
The high gain and low TCVOS assure accurate operation with inputs from microvolts
to volts. In this circuit, this signal always appears as a common-mode signal to the op
amps. The OP-77E CMRR of 1µV/V assures errors of less than 2ppm.
Low Noise Precision Reference
This circuit relies upon OP-77’s low TCVOS and noise combined with very high CMRR,
to provide precision buffering of the averaged REF-01 voltage outputs.
OP-77
+
-
RL
200ΩIRF520
R1
1Ω
V+
VIN
IO
R1
V
IIN
O=
0V VIN ≥
FULL SCALE OF 1V,
IO = 1A/V
OP-77
+
-
R1
200ΩIRF520
RL
VIN IO
V-
R1
V
IIN
O=
0V VIN ≤
OP-77E
+
-
0.1µF
-15V
+15V
R3
2kΩ
4
6
7
2
3
0.1µF
1kΩ
OP-77E
+
-
0.1µF
-15V
+15V
4
6
7
2
3
0.1µF
1kΩ
VOUT
0< VOUT<10V
C1
30pF D1
1N4148
2N4393
D2
2
6
4
VO
REF-01
2
6
4
VO
REF-01
2
6
4
VO
REF-01
100kΩ
100kΩ
100kΩ
OP-77
+
-
VOUT
0.1µF
+15V
10µF
+
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMSOP-77
PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted.
8 LEAD SOIC PLASTIC PACKAGE (S)
8 LEAD PLASTIC DIP PACKAGE (P)
0°-8° TYP
0.010-0.020
(0.254-0.508)
S (SO-8 ) AMS DRW# 042293
x 45°
0.016-0.050
(0.406-1.270)
0.008-0.010
(0.203-0.254)
0.004-0.010
(0.101-0.254)
0.014-0.019
(0.355-0.483)
0.053-0.069
(1.346-1.752)
0.050
(1.270)
TYP
0.150-0.157**
(3.810-3.988)
0.228-0.244
(5.791-6.197)
0.189-0.197*
(4.801-5.004)
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
1 2 3 4
8 7 6 5
0.045-0.065
(1.143-1.651)
0.255±0.015*
(6.477±0.381)
0.400*
(10.160)
MAX
1 2 3 4
8 7 6 5
0.130±0.005
(3.302±0.127)
0.018±0.003
(0.457±0.076)
0.100±0.010
(2.540±0.254) (8.255 )
+0.635
-0.381
0.325 +0.025
-0.015
0.009-0.015
(0.229-0.381)
0.300-0.325
(7.620-8.255)
0.065
(1.651)
TYP
0.005
(0.127)
MIN
0.125
(3.175)
MIN 0.015
(0.380)
MIN
*DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTUSIONS.
MOLD FLASH OR PROTUSIONS SHALL NOT EXCEED 0.010" (0.254mm)
P (8L PDIP ) AMS DRW# 042294
