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Precision op amps (Vos<1mV)

OPA2131

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Dual, 4-MHz, 50-pA bias current, 750-µA power, FET operational amplifier

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OPA2141 ACTIVE Dual, 10-MHz, single supply, low-noise, JFET precision amplifier Wider bandwidth (10 MHz), lower voltage noise (6.5 nV/√Hz) and higher offset voltage (3.5 mV) general purpose JFET amplifier

OPA2131

ACTIVE
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Product details

Number of channels 2 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 36 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 9 Vos (offset voltage at 25°C) (max) (mV) 1 Offset drift (typ) (µV/°C) 2 Input bias current (max) (pA) 50 GBW (typ) (MHz) 4 Slew rate (typ) (V/µs) 10 Rail-to-rail No Iq per channel (typ) (mA) 1.5 Vn at 1 kHz (typ) (nV√Hz) 15 CMRR (typ) (dB) 80 Rating Catalog Operating temperature range (°C) -55 to 125 Iout (typ) (A) 0.025 Architecture FET Input common mode headroom (to negative supply) (typ) (V) 3 Input common mode headroom (to positive supply) (typ) (V) -1 Output swing headroom (to negative supply) (typ) (V) 2.5 Output swing headroom (to positive supply) (typ) (V) -2.5 THD + N at 1 kHz (typ) (%) 0.0008
Number of channels 2 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 36 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 9 Vos (offset voltage at 25°C) (max) (mV) 1 Offset drift (typ) (µV/°C) 2 Input bias current (max) (pA) 50 GBW (typ) (MHz) 4 Slew rate (typ) (V/µs) 10 Rail-to-rail No Iq per channel (typ) (mA) 1.5 Vn at 1 kHz (typ) (nV√Hz) 15 CMRR (typ) (dB) 80 Rating Catalog Operating temperature range (°C) -55 to 125 Iout (typ) (A) 0.025 Architecture FET Input common mode headroom (to negative supply) (typ) (V) 3 Input common mode headroom (to positive supply) (typ) (V) -1 Output swing headroom (to negative supply) (typ) (V) 2.5 Output swing headroom (to positive supply) (typ) (V) -2.5 THD + N at 1 kHz (typ) (%) 0.0008
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm)
  • FET input: IB = 50pA max
  • Low offset voltage: 750µV max
  • Wide supply range: ±4.5V to ±18V
  • Slew rate: 10V/µs
  • Wide bandwidth: 4MHz
  • Excellent capacitive load drive
  • Single, dual, quad versions
  • FET input: IB = 50pA max
  • Low offset voltage: 750µV max
  • Wide supply range: ±4.5V to ±18V
  • Slew rate: 10V/µs
  • Wide bandwidth: 4MHz
  • Excellent capacitive load drive
  • Single, dual, quad versions

The OPAx131 series of FET-input op amps provides high performance at low cost. The OPA131 single, OPA2131 dual, and OPA4131 quad versions in industry-standard pinouts allow cost-effective design options.

The OPAx131 series offers excellent general-purpose performance, including low offset voltage, drift, and good dynamic characteristics.

Single and dual versions are available in an 8-pin, SOIC, surface-mount package. The quad version is available in 14-pin and 16-pin, SOIC, surface-mount packages, and a 14-pin PDIP package.

The OPAx131 series of FET-input op amps provides high performance at low cost. The OPA131 single, OPA2131 dual, and OPA4131 quad versions in industry-standard pinouts allow cost-effective design options.

The OPAx131 series offers excellent general-purpose performance, including low offset voltage, drift, and good dynamic characteristics.

Single and dual versions are available in an 8-pin, SOIC, surface-mount package. The quad version is available in 14-pin and 16-pin, SOIC, surface-mount packages, and a 14-pin PDIP package.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet OPAx131 General-Purpose, FET-Input Operational Amplifiers datasheet (Rev. B) PDF | HTML Jul 9, 2024
E-book The Signal e-book: A compendium of blog posts on op amp design topics PDF | HTML Mar 28, 2017

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

AMP-PDK-EVM — Amplifier performance development kit evaluation module

The amplifier performance development kit (PDK) is an evaluation module (EVM) kit to test common operational amplifier (op amp) parameters and is compatible with most op amps and comparators. The EVM kit offers a main board with several socketed daughtercard options to fit package needs, allowing (...)

User guide: PDF | HTML
Supported products & hardware
Simulation model

OPA2131 PSpice Model (Rev. A)

SBOM048A.ZIP (57 KB) - PSpice model
Supported products & hardware
Simulation model

OPAx131 PSpice Model (Rev. E)

SBOM040E.ZIP (33 KB) - PSpice model
Supported products & hardware
Simulation model

OPAx131 TINA-TI Reference Design (Rev. B)

SBOMAT2B (299 KB) - TINA-TI reference design
Supported products & hardware
Simulation model

OPAx131 TINA-TI Spice Model (Rev. D)

SBOM262D.ZIP (10 KB) - TINA-TI Spice model
Supported products & hardware
Calculation tool

ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)

Supported products & hardware
Calculation tool

OPAMP-NOISECALC — Noise Calculator

This folder contains three tools to help in understandning and managing noise in cicuits. The included tools are:

  • A noise generator tool - This is a Lab View 4-Run Time executable that generates Gaussian white noise, uniform white noise, 1/f noise, short noise, and 60Hz line noise. Temporal data, (...)
Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
SOIC (D) 8 Ultra Librarian
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