GENERAL DESCRIPTION

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 consumption. 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.

FEATURES

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: ±2.5 V to ±15 V

Unity-gain stable

No phase reversal

Inputs internally protected beyond supply voltage

APPLICATIONS

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