Analog Devices Inc.United States

The OP77 significantly advances the state-of-the-art in precision op amps. The OP77's outstanding fgain of 10,000,000 or more is maintained over the full ±10V output range. This exceptional gain-linearity eliminates incorrectable system nonlinearities common in previous monolithic op amps, and provides superior performance in high closed-loop-gain applications. Low intitial V OS drift and rapid stabilization time, combined with only 50mW power consumption, are significant imporvements over previous designs. These characteristics, plus the exceptional TCV OS and the low V OS of 25µV maximum, eliminates the need for V OS adjustment and increases system accuracy over temperature. PSRR of 3µV/V (110dB) and CMRR of 1.0µV/V maximum virtually eliminates errors caused by power supply drifts and common-mode signals. This combination of outstanding characteristics makes the OP77 ideally suited for high-resolution instrumentation and other tight error budget systems. The OP77 is a direct or upgrade replacement for the OP07, 05, 725, or 108A op amps. 741-types can be replaced by eliminating the V OS adjust pot.