High Temperature Precision, Low Power Instrumentation Amplifiers


Product details


Number of channels (#) 1 Vs (Max) (V) 36 Vs (Min) (V) 4.5 Input offset (+/-) (Max) (uV) 125 Gain (Min) (V/V) 1 Gain (Max) (V/V) 10000 Noise at 1 kHz (Typ) (nV/rt (Hz)) 8 Features Current Feedback, Overvoltage Protection CMRR (Min) (dB) 99 Input offset drift (+/-) (Max) (uV/C) 1 Input bias current (+/-) (Max) (nA) 10 Iq (Typ) (mA) 2 Bandwidth at min gain (Typ) (MHz) 1.3 Gain error (+/-) (Max) (%) 2.5 Operating temperature range (C) -55 to 210 Type Resistor Noise at 0.1 Hz-10 Hz (Typ) (uVpp) 0.2 Gain non-linearity (+/-) (Max) (%) 0.002 open-in-new Find other Instrumentation amplifiers

Package | Pins | Size

CDIP SB (JDJ) 8 88 mm² 7.49 x 11.81 CFP (HKJ) 8 39 mm² 6.9 x 5.65 CFP (HKQ) 8 39 mm² 6.9 x 5.65 open-in-new Find other Instrumentation amplifiers


  • Low Offset Voltage: 25 uV Typical
  • Low Input Bias Current: 50 nA Typical(1)
  • High CMR: 95 dB Typical(1)
  • Inputs Protected to ±40 V
  • Wide Supply Range: ±2.25 V to ±18 V
  • Low Quiescent Current: 2 mA Typical(1)
    • Bridge Amplifiers
    • Thermocouple Amplifiers
    • RTD Sensor Amplifiers
    • Medical Instrumentation
    • Data Acquisition
    • Supports Extreme Temperature Applications:
      • Controlled Baseline
      • One Assembly/Test Site
      • One Fabrication Site
      • Available in Extreme Temperature Ranges
        (–55°C to 210°C)(2)
      • Extended Product Life Cycle
      • Extended Product-Change Notification
      • Product Traceability

(1) Typical values for 210°C application.
(2) Custom temperature ranges available.
All other trademarks are the property of their respective owners

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The INA128-HT and INA129-HT are low-power, general-purpose instrumentation amplifiers offering excellent accuracy. The versatile three-operational-amplifier design and small size make them ideal for a wide range of applications. Current-feedback input circuitry provides wide bandwidth even at high gain. A single external resistor sets any gain from 1 to 10000. The INA128-HT provides an industry-standard gain equation; the INA129-HT gain equation is compatible with the AD620.

The INA128-HT and INA129-HT are laser trimmed for very low offset voltage (25 µV Typ) and high common-mode rejection (93 dB at G ≥ 100). These devices operate with power supplies as low as ±2.25 V, and quiescent current of 2 mA, typically. Internal input protection can withstand up to ±40 V without damage.

Texas Instruments' high-temperature products use highly optimized silicon (die) solutions with design and process enhancements to maximize performance over extended temperatures.

The INA129-HT is available in 8-pin ceramic DIP and 8-pin ceramic surface-mount packages, specified for the –55°C to 210°C temperature range. The INA128-HT is available in an 8-pin SOIC-8 surface-mount package, specified for the –55°C to 175°C temperature range.

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Technical documentation

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Type Title Date
* Data sheet INA12x-HT Precision, Low-Power Instrumentation Amplifiers datasheet (Rev. F) Oct. 24, 2013
* Radiation & reliability report INA129SHKJ Reliability Report May 07, 2012
* Radiation & reliability report INA129SHKQ Reliability Report May 07, 2012
* Radiation & reliability report INA129SJD Reliability Report May 07, 2012
Technical article What is an instrumentation amplifier? Aug. 09, 2019
E-book The Signal e-book: A compendium of blog posts on op amp design topics Mar. 28, 2017
Technical article How to layout a PCB for an instrumentation amplifier Oct. 14, 2016
Technical article Dealing with rejection: Instrumentation amplifier PSRR and CMRR (Part I) Nov. 25, 2013

Design & development

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Design tools & simulation

PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SPICE-based analog simulation program
TINA-TI 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 (...)
document-generic User guide
Analog engineer's calculator
ANALOG-ENGINEER-CALC — 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 (...)
  • Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
    • Noise calculations
    • Common unit translation
  • Solves common amplifier circuit design problems
    • Gain selections using standard resistors
    • Filter configurations
    • Total noise for common amplifier configurations
  • (...)
Common-Mode Input Range Calculator for Instrumentation Amplifiers
INA-CMV-CALC The Common-Mode Input Range Calculator is tool for quickly generating plots of an instrumentation amplifier’s common-mode input range vs output. The tool is compatible with both 2-amp and 3-amp instrumentation amplifiers utilizing any supply range.

The Common-Mode Input Range Calculator is pre-loaded (...)

  • Preloaded with 20 of TI’s most popular instrumentation amplifier specifications
  • Customizable supply, gain, and voltage reference options
  • Calculator displays output limitations graphically and numerically

CAD/CAE symbols

Package Pins Download
(KGD) 0 View options
CDIP SB (JDJ) 8 View options
CFP (HKJ) 8 View options
CFP (HKQ) 8 View options

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