Product details

Number of channels (#) 4 Total supply voltage (Max) (+5V=5, +/-5V=10) 40 Total supply voltage (Min) (+5V=5, +/-5V=10) 2.7 Rail-to-rail In, Out GBW (Typ) (MHz) 4.5 Slew rate (Typ) (V/us) 21 Vos (offset voltage @ 25 C) (Max) (mV) 0.895 Iq per channel (Typ) (mA) 0.56 Vn at 1 kHz (Typ) (nV/rtHz) 10.8 Rating HiRel Enhanced Product Operating temperature range (C) -55 to 125 Offset drift (Typ) (uV/C) 0.3 Features EMI Hardened, High Cload Drive, MUX Friendly, Small Size CMRR (Typ) (dB) 130 Output current (Typ) (mA) 75 Architecture CMOS
Number of channels (#) 4 Total supply voltage (Max) (+5V=5, +/-5V=10) 40 Total supply voltage (Min) (+5V=5, +/-5V=10) 2.7 Rail-to-rail In, Out GBW (Typ) (MHz) 4.5 Slew rate (Typ) (V/us) 21 Vos (offset voltage @ 25 C) (Max) (mV) 0.895 Iq per channel (Typ) (mA) 0.56 Vn at 1 kHz (Typ) (nV/rtHz) 10.8 Rating HiRel Enhanced Product Operating temperature range (C) -55 to 125 Offset drift (Typ) (uV/C) 0.3 Features EMI Hardened, High Cload Drive, MUX Friendly, Small Size CMRR (Typ) (dB) 130 Output current (Typ) (mA) 75 Architecture CMOS
SOT-23-THN (DYY) 14
  • Enhanced Plastic
    • Single controlled baseline
    • One fabrication, assembly and test site
    • Gold wire
    • NiPdAu lead finish
    • Available in military (–55°C to 125°C) temperature range
    • Extended product life cycle
    • Extended product-change notification
    • Product traceability
    • Enhanced mold compound for low outgassing
  • Low offset voltage: ±125 µV
  • 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
  • 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
  • Enhanced Plastic
    • Single controlled baseline
    • One fabrication, assembly and test site
    • Gold wire
    • NiPdAu lead finish
    • Available in military (–55°C to 125°C) temperature range
    • Extended product life cycle
    • Extended product-change notification
    • Product traceability
    • Enhanced mold compound for low outgassing
  • Low offset voltage: ±125 µV
  • 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
  • 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

The OPA4991-EP is a high voltage (40 V) general purpose operational amplifiers available in enhanced plastic packaging. The device offers 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 (10.8 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), and high capacitive load drive (1 nF) make the OPA4991-EP a robust, high-performance operational amplifier for high-voltage applications.

The OPA4991-EP is available in SOT-23 (DYY) package and is specified from –55°C to 125°C.

The OPA4991-EP is a high voltage (40 V) general purpose operational amplifiers available in enhanced plastic packaging. The device offers 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 (10.8 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), and high capacitive load drive (1 nF) make the OPA4991-EP a robust, high-performance operational amplifier for high-voltage applications.

The OPA4991-EP is available in SOT-23 (DYY) package and is specified from –55°C to 125°C.

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Technical documentation

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Type Title Date
* Data sheet OPA4991-EP 40-V, Rail-to-Rail Input/Output, Low Offset Voltage, Low Noise Op Amp in Enhanced Plastic datasheet (Rev. A) PDF | HTML 24 Aug 2022
Technical article What is an op amp? 21 Jan 2020
Technical article How to lay out a PCB for high-performance, low-side current-sensing designs 06 Feb 2018
Technical article Low-side current sensing for high-performance cost-sensitive applications 22 Jan 2018
Technical article Voltage and current sensing in HEV/EV applications 22 Nov 2017

Design & development

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Calculation tool

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