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OPA4991D Datasheet Low-Noise OpAmp

Manufacturer: Texas Instruments

Download the OPA4991D datasheet PDF. This datasheet also includes the OPA991 variant, as both parts are published together in a single manufacturer document.

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Note: The manufacturer provides a single datasheet file (OPA991-etcTI.pdf) that lists specifications for multiple related part numbers.

General 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/√ Hz and 1.8 µVPP) and 4.5-MHz bandwidth.

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Overview

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.

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.

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