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INA126

ACTIVE

36V microPower (175-µA), 250-µV offset, precision instrumentation amplifier

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Data sheet

INA126

ACTIVE
Data sheet Order now

Product details

Number of channels 1 Vs (max) (V) 36 Vs (min) (V) 2.7 Input offset (±) (max) (µV) 250 Voltage gain (min) (V/V) 5 Voltage gain (max) (V/V) 10000 Noise at 1 kHz (typ) (nV√Hz) 35 Features Low power CMRR (min) (dB) 83 Input offset drift (±) (max) (V/°C) 0.000003 Input bias current (±) (max) (nA) 25 Iq (typ) (mA) 0.175 Bandwidth at min gain (typ) (MHz) 0.2 Gain error (±) (max) (%) 0.5 Operating temperature range (°C) -55 to 125 Rating Catalog Type Resistor Gain nonlinearity (±) (max) (%) 0.012 Output swing headroom (to negative supply) (typ) (V) 0.8 Output swing headroom (to positive supply) (typ) (V) -0.75 Input common mode headroom (to negative supply) (typ) (V) 3.5 Input common mode headroom (to positive supply) (typ) (V) -3.5 Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 0.7
Number of channels 1 Vs (max) (V) 36 Vs (min) (V) 2.7 Input offset (±) (max) (µV) 250 Voltage gain (min) (V/V) 5 Voltage gain (max) (V/V) 10000 Noise at 1 kHz (typ) (nV√Hz) 35 Features Low power CMRR (min) (dB) 83 Input offset drift (±) (max) (V/°C) 0.000003 Input bias current (±) (max) (nA) 25 Iq (typ) (mA) 0.175 Bandwidth at min gain (typ) (MHz) 0.2 Gain error (±) (max) (%) 0.5 Operating temperature range (°C) -55 to 125 Rating Catalog Type Resistor Gain nonlinearity (±) (max) (%) 0.012 Output swing headroom (to negative supply) (typ) (V) 0.8 Output swing headroom (to positive supply) (typ) (V) -0.75 Input common mode headroom (to negative supply) (typ) (V) 3.5 Input common mode headroom (to positive supply) (typ) (V) -3.5 Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 0.7
SOIC (D) 8 29.4 mm² 4.9 x 6 VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • Low quiescent current: 175 µA/channel
  • Wide supply range: ±1.35 V to ±18 V
  • Low offset voltage: 250-µV maximum
  • Low offset drift: 3-µV/°C maximum
  • Low noise: 35 nV/√Hz
  • Low input bias current: 25-nA maximum
  • Temperature range: –40°C to +85°C
  • Multiple package options:
    • Single channel:
      • INA126P/PA 8-pin PDIP (P)
      • INA126U/UA 8-pin SOIC (D)
      • INA126E/EA 8-pin VSSOP (DGK)
    • Dual channels:
      • INA2126P/PA 16-pin PDIP (N)
      • INA2126U/UA 16-pin SOIC (D)
      • INA2126E/EA 16-pin SSOP (DBQ)
  • Low quiescent current: 175 µA/channel
  • Wide supply range: ±1.35 V to ±18 V
  • Low offset voltage: 250-µV maximum
  • Low offset drift: 3-µV/°C maximum
  • Low noise: 35 nV/√Hz
  • Low input bias current: 25-nA maximum
  • Temperature range: –40°C to +85°C
  • Multiple package options:
    • Single channel:
      • INA126P/PA 8-pin PDIP (P)
      • INA126U/UA 8-pin SOIC (D)
      • INA126E/EA 8-pin VSSOP (DGK)
    • Dual channels:
      • INA2126P/PA 16-pin PDIP (N)
      • INA2126U/UA 16-pin SOIC (D)
      • INA2126E/EA 16-pin SSOP (DBQ)

The INA126 and INA2126 (INAx126) are precision instrumentation amplifiers for accurate, low-noise, differential-signal acquisition. The two-op-amp design provides excellent performance with low quiescent current (175 µA/channel). These features combined with a wide operating voltage range of ±1.35 V to ±18 V make the INAx126 a great choice for portable instrumentation and data acquisition systems.

Gain can be set from 5 V/V to 10000 V/V with a single external resistor. Precision input circuitry provides low offset voltage (250 µV, maximum), low offset voltage drift (3 µV/°C, maximum), and excellent common-mode rejection.

All versions are specified for the –40°C to +85°C industrial temperature range.

The INA126 and INA2126 (INAx126) are precision instrumentation amplifiers for accurate, low-noise, differential-signal acquisition. The two-op-amp design provides excellent performance with low quiescent current (175 µA/channel). These features combined with a wide operating voltage range of ±1.35 V to ±18 V make the INAx126 a great choice for portable instrumentation and data acquisition systems.

Gain can be set from 5 V/V to 10000 V/V with a single external resistor. Precision input circuitry provides low offset voltage (250 µV, maximum), low offset voltage drift (3 µV/°C, maximum), and excellent common-mode rejection.

All versions are specified for the –40°C to +85°C industrial temperature range.
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Technical documentation

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Type Title Date
* Data sheet INAx126 MicroPower Instrumentation Amplifiers datasheet (Rev. C) PDF | HTML 18 Jan 2022
Application note Importance of Input Bias Current Return Paths in Instrumentation Amplifier Apps PDF | HTML 27 Jul 2021
Application note Comprehensive Error Calculation for Instrumentation Amplifiers 26 Mar 2019
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
EVM User's guide Universal Instrumentation Amplifier EVM User’s Guide (Rev. B) PDF | HTML 09 Aug 2016

Design & development

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Evaluation board

INAEVM — Universal Instrumentation Amplifier Evaluation Module

The universal INAEVM (Instrumentation Amplifier Evaluation Module) is available in two package options that simplify prototyping precision instrumentation amplifiers in either the SO-8 (D) package or the MSOP-8(DGK) package with the pinout shown.  See the chart in the user guide (...)

User guide: PDF | HTML
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Simulation model

INA126 TINA-TI Reference Design (Rev. B)

SBOC141B.TSC (85 KB) - TINA-TI Reference Design
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Simulation model

INA126 TINA-TI Spice Model (Rev. A)

SBOM210A.ZIP (3 KB) - TINA-TI Spice Model
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Simulation model

INA126 and INA2126 PSpice Model (Rev. B)

SBOM021B.ZIP (24 KB) - PSpice Model
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Calculation tool

ANALOG-ENGINEER-CALC — 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 (...)
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
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SOIC (D) 8 View options
VSSOP (DGK) 8 View options
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