a
FEATURES
Ultralow Offset Voltage:
T
A
= +25 C: 10 V max
–55 C
≤
T
A
≤
+125 C: 20 V max
Outstanding Offset Voltage Drift: 0.1 V/ C max
Excellent Open-Loop Gain and Gain Linearity:
12 V/ V typ
CMRR: 130 dB min
PSRR: 120 dB min
Low Supply Current: 2.0 mA max
Fits Industry Standard Precision Op Amp Sockets
(OP07/OP77)
Ultraprecision
Operational Amplifier
OP177
PIN CONNECTIONS
Epoxy Mini-DIP
OP177BRC/883
(P Suffix)
LCC (RC Suffix)
8-Pin Hermetic DIP
(Z-Suffix)
8-Pin SO
(S-Suffix)
NC = NO CONNECT
NC = NO CONNECT
GENERAL DESCRIPTION
The OP177 features the highest precision performance of any
op amp currently available. Offset voltage of the OP177 is only
10
µV
max at room temperature and 20
µV
max over the full
military temperature range of –55°C to +125°C. The ultralow
V
OS
of the OP177, combines with its exceptional offset voltage
drift (TCV
OS
) of 0.1
µV/°C
max, to eliminate the need for
external V
OS
adjustment and increases system accuracy over
temperature.
The OP177’s open-loop gain of 12 V/µV is maintained over the
full
±
10 V output range. CMRR of 130 dB min, PSRR of
120 dB min, and maximum supply current of 2 mA are just a
few examples of the excellent performance of this operational
amplifier. The OP177’s combination of outstanding specifications
insure accurate performance in high closed-loop gain applications.
This low noise bipolar input op amp is also a cost effective
alternative to chopper-stabilized amplifiers. The OP177 provides
chopper-type performance without the usual problems of high
noise, low frequency chopper spikes, large physical size, limited
common-mode input voltage range, and bulky external storage
capacitors.
The OP177 is offered in both the –55°C to +125°C military,
and the –40°C to +85°C extended industrial temperature
ranges. This product is available in 8-pin ceramic and epoxy
DIPs, as well as the space saving 8-pin Small-Outline (SO) and
the Leadless Chip Carrier (LCC) packages.
Figure 1. Simplified Schematic
REV. B
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
© Analog Devices, Inc., 1995
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
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