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INA126

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

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

INA126

ACTIVE
Data sheet Order now

Product details

Number of channels (#) 1 Vs (Max) (V) 36 Vs (Min) (V) 2.7 Input offset (+/-) (Max) (uV) 250 Gain (Min) (V/V) 5 Gain (Max) (V/V) 10000 Noise at 1 kHz (Typ) (nV/rt (Hz)) 35 Features Low power CMRR (Min) (dB) 83 Input offset drift (+/-) (Max) (uV/C) 3 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 Type Resistor 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-10 Hz (Typ) (uVpp) 0.7 Gain non-linearity (+/-) (Max) (%) 0.012
Number of channels (#) 1 Vs (Max) (V) 36 Vs (Min) (V) 2.7 Input offset (+/-) (Max) (uV) 250 Gain (Min) (V/V) 5 Gain (Max) (V/V) 10000 Noise at 1 kHz (Typ) (nV/rt (Hz)) 35 Features Low power CMRR (Min) (dB) 83 Input offset drift (+/-) (Max) (uV/C) 3 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 Type Resistor 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-10 Hz (Typ) (uVpp) 0.7 Gain non-linearity (+/-) (Max) (%) 0.012
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PDIP (P) 8 93 mm² 9.81 x 9.43 SOIC (D) 8 — VSSOP (DGK) 8 15 mm² 3 x 4.9
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  • 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
  • 8-Pin PDIP, SOIC, VSSOP Surface-Mount Dual:
    16-Pin PDIP, SOIC, SSOP
  • 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
  • 8-Pin PDIP, SOIC, VSSOP Surface-Mount Dual:
    16-Pin PDIP, SOIC, SSOP
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The INA126 and INA2126 are precision instrumentation amplifiers for accurate, low noise differential-signal acquisition. Their two-op-amp design provides excellent performance with low quiescent current (175 µA/channel). Combined with a wide operating voltage range of ±1.35 V to ±18 V, makes the INAx126 ideal for portable instrumentation and data acquisition systems.

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

Single version package options include 8-pin plastic PDIP, SOIC-8, and fine-pitch VSSOP-8 surface-mount. Dual version is available in 16-pin plastic PDIP, SOIC-8, and the space-saving, fine-pitch SSOP-16 surface-mount. All are specified for the –40°C to +85°C industrial temperature range.

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

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

Single version package options include 8-pin plastic PDIP, SOIC-8, and fine-pitch VSSOP-8 surface-mount. Dual version is available in 16-pin plastic PDIP, SOIC-8, and the space-saving, fine-pitch SSOP-16 surface-mount. All 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 Amplifier Single and Dual Versions datasheet (Rev. B) 31 Dec 2015
Application note Importance of Input Bias Current Return Paths in Instrumentation Amplifier Apps 27 Jul 2021
Technical article What is an instrumentation amplifier? 09 Aug 2019
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
Technical article How to layout a PCB for an instrumentation amplifier 14 Oct 2016
User guide Universal Instrumentation Amplifier EVM User’s Guide (Rev. B) 09 Aug 2016
Technical article Dealing with rejection: Instrumentation amplifier PSRR and CMRR (Part I) 25 Nov 2013
Technical article What you need to know about CMRR – Instrumentation amplifier topologies (Part 3) 06 Nov 2013

Design & development

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

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 (...)

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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 PSpice Model (Rev. A)

SBOM021A.ZIP (56 KB) - PSpice Model
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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 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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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 op-amp gain with feedback (...)
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Package Pins Download
PDIP (P) 8 View options
SOIC (D) 8 View options
VSSOP (DGK) 8 View options

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