Precision Low Noise, Low Input
Bias Current Operational Amplifiers
OP1177/OP2177/OP4177
FEATURES
PIN CONFIGURATIONS
Low offset voltage: 60 μV maximum
Very low offset voltage drift: 0.7 μV/°C maximum
Low input bias current: 2 nA maximum
Low noise: 8 nV/√Hz typical
CMRR, PSRR, and AVO > 120 dB minimum
Low supply current: 400 μA per amplifier
Dual supply operation: 2.ꢀ V to 1ꢀ V
Unity-gain stable
NC
–IN
+IN
V–
NC
V+
1
2
3
4
8
7
6
5
OP1177
1
8
NC
–IN
+IN
V–
NC
V+
OUT
NC
OUT
NC
OP1177
4
5
NC = NO CONNECT
NC = NO CONNECT
Figure 1. 8-Lead MSOP (RM Suffix)
Figure 2. 8-Lead SOIC_N (R Suffix)
OUT A
–IN A
+IN A
V–
V+
1
2
3
4
8
7
6
5
No phase reversal
Inputs internally protected beyond supply voltage
OUT B
–IN B
+IN B
OP2177
1
8
OUT A
–IN A
+IN A
V–
V+
OUT B
–IN B
+IN B
OP2177
4
5
APPLICATIONS
Figure 3. 8-Lead MSOP (RM Suffix)
Figure 4. 8-Lead SOIC_N (R Suffix)
Wireless base station control circuits
Optical network control circuits
Instrumentation
Sensors and controls
Thermocouples
Resistor thermal detectors (RTDs)
Strain bridges
Shunt current measurements
Precision filters
OUT A
1
2
OUT D
–IN D
14
13
–IN A
+IN A
V+
+IN D
V–
3
4
12
11
OP4177
OUT A
OUT D
–IN D
+IN D
V–
1
7
14
–IN A
+IN A
V+
+IN B
–IN B
+IN C
–IN C
OUT C
+IN B
–IN B
5
6
7
10
9
OP4177
+IN C
–IN C
OUT C
8
OUT B
8
OUT B
Figure 5. 14-Lead SOIC_N (R Suffix)
Figure 6. 14-Lead TSSOP (RU Suffix)
GENERAL DESCRIPTION
performance in the SOIC package. MSOP and TSSOP are
available in tape and reel only.
The OPx177 family consists of very high precision, single, dual,
and quad amplifiers featuring extremely low offset voltage and
drift, low input bias current, low noise, and low power consump-
tion. Outputs are stable with capacitive loads of over 1000 pF
with no external compensation. Supply current is less than 500 μA
per amplifier at 30 V. Internal 500 Ω series resistors protect the
inputs, allowing input signal levels several volts beyond either
supply without phase reversal.
The OPx177 family offers the widest specified temperature
range of any high precision amplifier in surface-mount packaging.
All versions are fully specified for operation from −40°C to
+125°C for the most demanding operating environments.
Applications for these amplifiers include precision diode
power measurement, voltage and current level setting, and
level detection in optical and wireless transmission systems.
Additional applications include line-powered and portable
instrumentation and controls—thermocouple, RTD, strain-
bridge, and other sensor signal conditioning—and precision filters.
Unlike previous high voltage amplifiers with very low offset
voltages, the OP1177 (single) and OP2177 (dual) amplifiers
are available in tiny 8-lead surface-mount MSOP and 8-lead
narrow SOIC packages. The OP4177 (quad) is available in
TSSOP and 14-lead narrow SOIC packages. Moreover, specified
performance in the MSOP and the TSSOP is identical to
Rev. G
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
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 notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registeredtrademarks arethe property of their respective owners.
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Tel: 781.329.4700
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Fax: 781.461.3113 ©2001–2009 Analog Devices, Inc. All rights reserved.
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