OPA991TIDCKR

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, typical), low offset drift (±0.3 µV/°C, typical), low noise (10.5 nV/√Hz and 1.8 µV_PP), and 4.5-MHz bandwidth.

Unique features such as differential and common-mode input-voltage range to the supply rail, high output current (±75 mA), high slew rate (21 V/µs), high capacitive load drive (1 nF), and shutdown functionality make the OPAx991 a robust, high-performance operational amplifier for high-voltage industrial applications.

The OPAx991 family of op amps is available in micro-size packages (such as X2QFN and WSON), as well as standard packages (such as SOT-23, SOIC, and TSSOP), and is specified from –40°C to 125°C.

Key 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