The OPAx186 operational amplifier combines precision offset and drift with excellent overall performance, making the device a great choice for a wide variety of precision applications. The precision offset drift of only 0.01 µV/°C provides stability over the entire operating temperature range of –40°C to +125°C. In addition, this device offers excellent linear performance with high CMRR, PSRR, and A_OL. As with all amplifiers, applications with noisy or high-impedance power supplies require decoupling capacitors close to the device pins. In most cases, 0.1-µF capacitors are adequate. For details and a layout example, see Section 8.4.

The OPAx186 is part of a family of zero-drift, MUX-friendly, rail-to-rail output operational amplifiers. This device operates from 4.5 V to 24 V, is unity-gain stable, and is designed for a wide range of general-purpose and precision applications. The zero-drift architecture provides ultra-low input offset voltage and near-zero input offset voltage drift over temperature and time. This choice of architecture also offers outstanding ac performance, such as ultra-low broadband noise, zero flicker noise, and outstanding distortion performance when operating at less than the chopper frequency.

The following section shows a representation of the proprietary OPAx186 architecture.