OPA991 Datasheet

OPA991 Low-Noise OpAmp

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.

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 p.