Precision Low Noise, Low Input
Bias Current Operational Amplifiers
a
OP1177/OP2177/OP4177
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Low Offset Voltage: 60 V Max
Very Low Offset Voltage Drift: 0.7 V/؇C Max
Low Input Bias Current: 2 nA Max
8-Lead MSOP
(RM-Suffix)
8-Lead SOIC
(R-Suffix)
Low Noise: 8 nV/√Hz
CMRR, PSRR, and AVO > 120 dB Min
Low Supply Current: 400 A/Amp
Dual Supply Operation: ؎2.5 V to ؎15 V
Unity Gain Stable
1
8
NC
؊IN
؉IN
V؊
NC
V+
OUT
NC
NC
؊IN
+IN
V؊
NC
V+
1
2
3
4
8
7
6
5
OP1177
4
5
OP1177
OUT
NC
NC = NO CONNECT
No Phase Reversal
Inputs Internally Protected Beyond Supply Voltage
NC = NO CONNECT
APPLICATIONS
Wireless Base Station Control Circuits
Optical Network Control Circuits
Instrumentation
8-Lead SOIC
(R-Suffix)
8-Lead MSOP
(RM-Suffix)
Sensors and Controls
Thermocouples
RTDs
Strain Bridges
Shunt Current Measurements
Precision Filters
V+
1
8
5
OUT A
؊IN A
؉IN A
V؊
OUT A
؊IN A
+IN A
V؊
V+
1
2
3
4
8
7
6
5
OUT B
–IN B
+IN B
OP2177
OUT B
OP2177
4
؊IN B
+IN B
GENERAL DESCRIPTION
14-Lead SOIC
(R-Suffix)
14-Lead TSSOP
(RU-Suffix)
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 con-
sumption. Outputs are stable with capacitive loads of over
1,000 pF with no external compensation. Supply current is less
than 500 µA per amplifier at 30 V. Internal 500 Ω series resis-
tors protect the inputs, allowing input signal levels several volts
beyond either supply without phase reversal.
OUT A
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
1
14
OUT A
1
14 OUT D
–IN A
+IN A
V+
+IN B
–IN B
؊IN D
2
3
4
13
12
؊IN A
+IN A
V+
OP4177
+IN D
OP4177
OP4177
8
11 V؊
7
OUT B
+IN C
+IN B
؊IN B
OUT B
5
6
7
10
9
Unlike previous high-voltage amplifiers with very low offset voltages, the
OP1177 and OP2177 are available in the tiny MSOP 8-lead sur-
face-mount package, while the OP4177 is available in TSSOP14.
Moreover, specified performance in the MSOP/TSSOP package is
identical to performance in the SOIC package.
؊IN C
8
OUT C
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.
and controls—thermocouple, RTD, strain-bridge, and other
sensor signal conditioning—and precision filters.
The OP1177 (single) and the OP2177 (dual) amplifiers are
available in the 8-lead MSOP and 8-lead SOIC packages. The
OP4177 (quad) is available in 14-lead narrow SOIC and 14-lead
TSSOP packages. MSOP and TSSOP packages are available in
tape and reel only.
Applications for these amplifiers include precision diode power
measurement, voltage and current level setting, and level detec-
tion in optical and wireless transmission systems. Additional
applications include line powered and portable instrumentation
REV. B
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reliable. However, no responsibility is assumed by Analog Devices for its
use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
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© Analog Devices, Inc., 2002