The OPAx863A bipolar voltage-feedback amplifiers offer a 50-MHz gain-bandwidth product with a proprietary in-package trim technology for high-precision performance with a maximum 95‑µV input offset voltage and 1.2‑µV/℃ offset drift. The OPAx863A are low-power, rail-to-rail input and output (RRIO) operational amplifiers with a voltage noise density of 6.3 nV/√Hz and a 1/f noise corner at 25 Hz. The OPAx863A work with a wide-supply voltage range of 2.7 V to 12.6 V and consume only 800 µA of quiescent current. The OPAx863A operate with a 2.7‑V supply, are RRIO capable, consume low power, and offer a power-down mode, which makes them an excellent amplifier choice for 3.3‑V or lower voltage applications that need excellent ac performance. The main and auxiliary input stages of the amplifier are matched for gain bandwidth product (GBW), noise, and offset voltage, and designed for applications that require a wide dynamic input range and good SNR.

The device includes an overload power limit feature that limits the increase in quiescent current with overdriven and saturated outputs to either of the supply rails. For more details of this overload power limit feature, see Section 7.3.2.1. The amplifier output is protected against short-circuit fault conditions.

The OPAx863A feature a power-down mode (PD) with a PD quiescent current of 20µA (maximum) with a 3‑V supply, and a turn-on and turn-off time less than 8µs.