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OPA2991

ACTIVE

Dual, 40-V, 4.5-MHz, low-power operational amplifier

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Data sheet

OPA2991

ACTIVE
Data sheet Order now

Product details

Number of channels 2 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 40 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.7 Rail-to-rail In, Out GBW (typ) (MHz) 4.5 Slew rate (typ) (V/µs) 21 Vos (offset voltage at 25°C) (max) (mV) 0.75 Iq per channel (typ) (mA) 0.56 Vn at 1 kHz (typ) (nV√Hz) 10.8 Rating Catalog Operating temperature range (°C) -40 to 125 Offset drift (typ) (µV/°C) 0.3 Features EMI Hardened, High Cload Drive, MUX Friendly, Shutdown, Small Size CMRR (typ) (dB) 130 Iout (typ) (A) 0.075 Architecture CMOS Input common mode headroom (to negative supply) (typ) (V) -0.1 Input common mode headroom (to positive supply) (typ) (V) 0.1 Output swing headroom (to negative supply) (typ) (V) 0.025 Output swing headroom (to positive supply) (typ) (V) -0.025
Number of channels 2 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 40 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.7 Rail-to-rail In, Out GBW (typ) (MHz) 4.5 Slew rate (typ) (V/µs) 21 Vos (offset voltage at 25°C) (max) (mV) 0.75 Iq per channel (typ) (mA) 0.56 Vn at 1 kHz (typ) (nV√Hz) 10.8 Rating Catalog Operating temperature range (°C) -40 to 125 Offset drift (typ) (µV/°C) 0.3 Features EMI Hardened, High Cload Drive, MUX Friendly, Shutdown, Small Size CMRR (typ) (dB) 130 Iout (typ) (A) 0.075 Architecture CMOS Input common mode headroom (to negative supply) (typ) (V) -0.1 Input common mode headroom (to positive supply) (typ) (V) 0.1 Output swing headroom (to negative supply) (typ) (V) 0.025 Output swing headroom (to positive supply) (typ) (V) -0.025
SOIC (D) 8 29.4 mm² 4.9 x 6 SOT-23-THN (DDF) 8 8.12 mm² 2.9 x 2.8 TSSOP (PW) 8 19.2 mm² 3 x 6.4 VSSOP (DGK) 8 14.7 mm² 3 x 4.9 WSON (DSG) 8 4 mm² 2 x 2 X2QFN (RUG) 10 3 mm² 1.5 x 2
  • 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
  • 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

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 µVPP), 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.

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 µVPP), 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.
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Type Title Date
* Data sheet OPAx991 40-V Rail-to-Rail Input/Output, Low Offset Voltage, Low Noise Op Amp datasheet (Rev. F) PDF | HTML 04 Jan 2022
Application note Ramping Up on Slew Rate PDF | HTML 13 Jul 2023
Application note DC Parameters: Input Offset Voltage (VOS) (Rev. B) PDF | HTML 31 Mar 2023
Application brief Using An Op Amp for High-Side Current Sensing (Rev. A) PDF | HTML 07 Dec 2021
Analog Design Journal Optimizing input and output transient settling times in amplifier circuits PDF | HTML 18 Nov 2021
Circuit design Voltage-to-current (V-I) converter circuit with a Darlington transistor PDF | HTML 14 May 2021
Circuit design AC-coupled transimpedance amplifier circuit PDF | HTML 13 May 2021
Third party document Programmable analog output circuit maximizes industrial system flexibility 01 Feb 2021
Analog Design Journal Second-sourcing options for small-package amplifiers 26 Mar 2018

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