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OPA2991 ACTIVE Dual, 40-V, 4.5-MHz, low-power operational amplifier Pin-to-pin upgrade with improved performance: lower Vos(0.75mV) and noise(10nV/√Hz), higher slew rate(21V/us) and output current(75mA)

Product details

Number of channels (#) 2 Total supply voltage (Max) (+5V=5, +/-5V=10) 36 Total supply voltage (Min) (+5V=5, +/-5V=10) 2.7 Rail-to-rail In to V-, Out GBW (Typ) (MHz) 3 Slew rate (Typ) (V/us) 1.5 Vos (offset voltage @ 25 C) (Max) (mV) 1.8 Iq per channel (Typ) (mA) 0.475 Vn at 1 kHz (Typ) (nV/rtHz) 14 Rating Catalog Operating temperature range (C) -40 to 125 Offset drift (Typ) (uV/C) 0.3 Features EMI Hardened Input bias current (Max) (pA) 15 CMRR (Typ) (dB) 120 Output current (Typ) (mA) 25 Architecture CMOS
Number of channels (#) 2 Total supply voltage (Max) (+5V=5, +/-5V=10) 36 Total supply voltage (Min) (+5V=5, +/-5V=10) 2.7 Rail-to-rail In to V-, Out GBW (Typ) (MHz) 3 Slew rate (Typ) (V/us) 1.5 Vos (offset voltage @ 25 C) (Max) (mV) 1.8 Iq per channel (Typ) (mA) 0.475 Vn at 1 kHz (Typ) (nV/rtHz) 14 Rating Catalog Operating temperature range (C) -40 to 125 Offset drift (Typ) (uV/C) 0.3 Features EMI Hardened Input bias current (Max) (pA) 15 CMRR (Typ) (dB) 120 Output current (Typ) (mA) 25 Architecture CMOS
SOIC (D) 8 19 mm² 4.9 x 3.9 VSSOP (DCU) 8 6 mm² 2 x 3.1 VSSOP (DGK) 8 15 mm² 3 x 4.9
  • Supply range: 2.7 to 36 V, ±1.35 V to ±18 V
  • Low noise: 14 nV/√Hz
  • Low offset drift: ±0.3 µV/°C (typical)
  • RFI filtered inputs
  • Input range includes the negative supply
  • Input range operates to positive supply
  • Rail-to-rail output
  • Gain bandwidth: 3 MHz
  • Low quiescent current: 475 µA per amplifier
  • High common-mode rejection: 120 dB (typical)
  • Low-input bias current: 8 pA
  • Industry-standard packages:
    • 8-pin SOIC
    • 8-pin MSOP
    • 14-pin TSSOP
  • Micro packages:
    • Single in SOT-553
    • Dual in VSSOP-8
  • Supply range: 2.7 to 36 V, ±1.35 V to ±18 V
  • Low noise: 14 nV/√Hz
  • Low offset drift: ±0.3 µV/°C (typical)
  • RFI filtered inputs
  • Input range includes the negative supply
  • Input range operates to positive supply
  • Rail-to-rail output
  • Gain bandwidth: 3 MHz
  • Low quiescent current: 475 µA per amplifier
  • High common-mode rejection: 120 dB (typical)
  • Low-input bias current: 8 pA
  • Industry-standard packages:
    • 8-pin SOIC
    • 8-pin MSOP
    • 14-pin TSSOP
  • Micro packages:
    • Single in SOT-553
    • Dual in VSSOP-8

The OPA171, OPA2171, and OPA4171 (OPAx171) are a family of 36-V, single-supply, low-noise operational amplifiers with the ability to operate on supplies ranging from 2.7 V (±1.35 V) to 36 V (±18 V). These devices are available in micro-packages and offer low offset, drift, and bandwidth with low quiescent current. The single, dual, and quad versions all have identical specifications for maximum design flexibility.

Unlike most operational amplifiers, which are specified at only one supply voltage, the OPAx171 family is specified from 2.7 to 36 V. Input signals beyond the supply rails do not cause phase reversal. The OPAx171 family is stable with capacitive loads up to 300 pF. The input can operate 100 mV below the negative rail and within 2 V of the top rail during normal operation. These devices can operate with full rail-to-rail input 100 mV beyond the top rail, but with reduced performance within 2 V of the top rail.

The OPAx171 series of operational amplifiers are specified from –40°C to +125°C.

The OPA171, OPA2171, and OPA4171 (OPAx171) are a family of 36-V, single-supply, low-noise operational amplifiers with the ability to operate on supplies ranging from 2.7 V (±1.35 V) to 36 V (±18 V). These devices are available in micro-packages and offer low offset, drift, and bandwidth with low quiescent current. The single, dual, and quad versions all have identical specifications for maximum design flexibility.

Unlike most operational amplifiers, which are specified at only one supply voltage, the OPAx171 family is specified from 2.7 to 36 V. Input signals beyond the supply rails do not cause phase reversal. The OPAx171 family is stable with capacitive loads up to 300 pF. The input can operate 100 mV below the negative rail and within 2 V of the top rail during normal operation. These devices can operate with full rail-to-rail input 100 mV beyond the top rail, but with reduced performance within 2 V of the top rail.

The OPAx171 series of operational amplifiers are specified from –40°C to +125°C.

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Technical documentation

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Type Title Date
* Data sheet OPAx171 36-V, Single-Supply, SOT-553, General-Purpose Operational Amplifiers datasheet (Rev. G) 22 May 2020
Technical article What is an op amp? 21 Jan 2020
E-book Analog Engineer’s Pocket Reference Guide Fifth Edition (Rev. C) 30 Nov 2018
Technical article Improving sensor DAQ performance using the PRU-ICSS for grid protection and control 09 Oct 2018
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
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
Application note OPA171 EMI Immunity Performance 29 Mar 2016

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SOIC (D) 8 View options
VSSOP (DCU) 8 View options
VSSOP (DGK) 8 View options

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