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OPA4991 - Low-Noise OpAmp

Download the OPA4991 datasheet PDF. This datasheet also covers the OPA991 variant, as both devices belong to the same low-noise opamp family and are provided as variant models within a single manufacturer datasheet.

General Description

The OPAx991 family (OPA991, OPA2991, and OPA4991) is a family of high voltage (40-V) general purpose operational amplifiers.

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.

📥 Download Datasheet

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

📁 Similar Datasheet

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Other Datasheets by Texas Instruments

Part Number Description
OPA4991-Q1 Low Noise Op Amp
OPA4991D Low-Noise OpAmp
OPA4991PW Low-Noise OpAmp
OPA4990 Low-Power OpAmp
OPA4990D Low-Power OpAmp

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
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.