The OPAx189 operational amplifiers combine precision offset and drift with excellent overall performance, making these devices an excellent choice for many precision applications. The precision offset drift of only 0.005 µV/°C provides stability over the entire temperature range. In addition, these devices offer 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. See the Layout Guidelines section for details and layout example.

The OPAx189 are part of a family of zero-drift, MUX-friendly, rail-to-rail output operational amplifiers. These devices operate from 4.5 V to 36 V, are unity-gain stable, and are 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 below the chopper frequency.