OPA991

www.ti.com OPA991, OPA2991, OPA4991 SBOS969D – OOCTPOAB9E9R12,0O19P–AR2E9V9IS1E,DOJPUALY42909210 SBOS969D – OCTOBER 2019 – REVISED JULY 2020 OPAx991 40-V Rail-to-Rail Input/Output, Low Offset Voltage, Low Noise Op Amp 1 Features Low offset voltage: ±125 µV Low offset voltage drift: ±0.3 µV/°C Low noise: 10.8 nV/√ Hz at 1 kHz High common-mode rejection: 130 dB Low bias current: ±10 pA Rail-to-rail input and output Wide bandwidth: 4.5 MHz GBW High slew rate: 21 V/µs High capacitive load drive: 1 nF MUX-friendly/comparator inputs – Amplifier operates with differential inputs up to supply rail – Amplifier can be used in open-loop or as comparator Low quiescent current: 560 µA per amplifier Wide supply: ±1.35 V to ±20 V, 2.7 V to 40 V Robust EMIRR performance: EMI/RFI filters on input and supply pins Differential and common-mode input voltage range to supply rail 2 Applications Low-power audio preamplifier Multiplexed data-acquisition systems Test and measurement equipment ADC driver amplifiers SAR ADC reference buffers Programmable logic controllers High-side and low-side current sensing High precision comparator 3 Description The OPAx991 family (OPA991, OPA2991, and OPA4991) is a family of high voltage (40-V) general purpose operational amplifiers. These devices offer exceptional DC precision and AC performance, including rail-to-rail input/output, low offset (±125 µV, typ), low offset drift (±0.3 µV/°C, typ), low noise (10.5 nV/√...