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Precision op amps (Vos<1mV)

OPA191

ACTIVE

Low-Power, Precision, 36-V, e-trim CMOS Amplifier

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Data sheet

OPA191

ACTIVE
Data sheet Order now

Product details

Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 36 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 4.5 Vos (offset voltage at 25°C) (max) (mV) 0.025 Offset drift (typ) (µV/°C) 0.1 Input bias current (max) (pA) 20 GBW (typ) (MHz) 2.5 Features EMI Hardened, High Cload Drive, e-Trim™ Slew rate (typ) (V/µs) 5.5 Rail-to-rail In, Out Iq per channel (typ) (mA) 0.14 Vn at 1 kHz (typ) (nV√Hz) 15 CMRR (typ) (dB) 140 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.065 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) 0.05 Output swing headroom (to positive supply) (typ) (V) -0.05 THD + N at 1 kHz (typ) (%) 0.0012
Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 36 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 4.5 Vos (offset voltage at 25°C) (max) (mV) 0.025 Offset drift (typ) (µV/°C) 0.1 Input bias current (max) (pA) 20 GBW (typ) (MHz) 2.5 Features EMI Hardened, High Cload Drive, e-Trim™ Slew rate (typ) (V/µs) 5.5 Rail-to-rail In, Out Iq per channel (typ) (mA) 0.14 Vn at 1 kHz (typ) (nV√Hz) 15 CMRR (typ) (dB) 140 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.065 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) 0.05 Output swing headroom (to positive supply) (typ) (V) -0.05 THD + N at 1 kHz (typ) (%) 0.0012
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm) SOT-23 (DBV) 5 8.12 mm² (2.9 mm × 2.8 mm) VSSOP (DGK) 8 14.7 mm² (3 mm × 4.9 mm)
  • Low offset voltage: ±5 µV
  • Low offset voltage drift: ±0.1 µV/°C
  • Low noise: 15 nV/√ Hz at 1 kHz
  • High common-mode rejection: 140 dB
  • Low bias current: ±5 pA
  • Rail-to-rail input and output
  • Wide bandwidth: 2.5-MHz GBW
  • High slew rate: 5 V/µs
  • Low quiescent current: 140 µA per amplifier
  • Wide supply: ±2.25 V to ±18 V, 4.5 V to 36 V
  • EMI/RFI filtered inputs
  • Differential input voltage range to supply rail
  • High capacitive load drive capability: 1 nF
  • Industry standard packages:
    • Single in SOIC-8, SOT-5, and VSSOP-8
    • Dual in SOIC-8 and VSSOP-8
    • Quad in SOIC-14, TSSOP-14, and WQFN-16
  • Low offset voltage: ±5 µV
  • Low offset voltage drift: ±0.1 µV/°C
  • Low noise: 15 nV/√ Hz at 1 kHz
  • High common-mode rejection: 140 dB
  • Low bias current: ±5 pA
  • Rail-to-rail input and output
  • Wide bandwidth: 2.5-MHz GBW
  • High slew rate: 5 V/µs
  • Low quiescent current: 140 µA per amplifier
  • Wide supply: ±2.25 V to ±18 V, 4.5 V to 36 V
  • EMI/RFI filtered inputs
  • Differential input voltage range to supply rail
  • High capacitive load drive capability: 1 nF
  • Industry standard packages:
    • Single in SOIC-8, SOT-5, and VSSOP-8
    • Dual in SOIC-8 and VSSOP-8
    • Quad in SOIC-14, TSSOP-14, and WQFN-16

The OPAx191 family (OPA191, OPA2191, and OPA4191) is a new generation of 36-V, e-trim™ operational amplifiers.

These devices offer outstanding dc precision and ac performance, including rail-to-rail input/output, low offset voltage (±5 µV, typ), low offset drift (±0.2 µV/°C, typ), and 2-MHz bandwidth.

Unique features, such as differential input-voltage range to the supply rail, high output current (±65 mA), high capacitive load drive of up to 1 nF, and high slew rate (5 V/µs), make the OPAx191 a robust, high-performance operational amplifier for high-voltage industrial applications.

The OPAx191 family of op amps is available in standard packages and is specified from –40°C to +125°C.

The OPAx191 family (OPA191, OPA2191, and OPA4191) is a new generation of 36-V, e-trim™ operational amplifiers.

These devices offer outstanding dc precision and ac performance, including rail-to-rail input/output, low offset voltage (±5 µV, typ), low offset drift (±0.2 µV/°C, typ), and 2-MHz bandwidth.

Unique features, such as differential input-voltage range to the supply rail, high output current (±65 mA), high capacitive load drive of up to 1 nF, and high slew rate (5 V/µs), make the OPAx191 a robust, high-performance operational amplifier for high-voltage industrial applications.

The OPAx191 family of op amps is available in standard packages and is specified from –40°C to +125°C.
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Technical documentation

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* Data sheet OPAx191 36-V, Low-Power, Precision, CMOS, Rail-to-Rail Input/Output, Low Offset Voltage, Low Input Bias Current Op Amp datasheet (Rev. D) PDF | HTML Aug 4, 2021
Application brief Offset Correction Methods: Laser Trim, e-Trim, and Chopper (Rev. D) PDF | HTML Dec 5, 2024
Application note Analysis of Improved Howland Current Pump Configurations (Rev. A) PDF | HTML Feb 9, 2023
Application brief MUX-Friendly, Precision Operational Amplifiers (Rev. C) PDF | HTML Feb 8, 2022
Application brief Low-Power, Small-Size, High-Side Current Monitoring Jun 3, 2020
Circuit design Non-inverting op amp with inverting positive reference voltage circuit (Rev. A) Feb 4, 2019
Circuit design Noninverting amplifier circuit (Rev. A) PDF | HTML Jan 31, 2019
Application brief Green-Williams-Lis: Improved Op Amp Spice Model Jan 28, 2019
Application brief Multichannel Analog Input Modules for PLC Equipment Jan 4, 2019
E-book The Signal e-book: A compendium of blog posts on op amp design topics PDF | HTML Mar 28, 2017
E-book Analog Engineer’s Pocket Reference Guide Fifth Edition (Rev. D) PDF | HTML Sep 30, 2014

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Package Pins CAD symbols, footprints & 3D models
SOIC (D) 8 Ultra Librarian
SOT-23 (DBV) 5 Ultra Librarian
VSSOP (DGK) 8 Ultra Librarian
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