精密，低噪声，低输入偏置电流运算放大器 Precision Low Noise, Low Input Bias Current Operational Amplifiers
**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 A****VO ****> 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**