INA122

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Single Supply, MicroPower Instrumentation Amplifier

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Product details

Parameters

Number of channels (#) 1 Vs (Max) (V) 36 Vs (Min) (V) 2.2 Input offset (+/-) (Max) (uV) 250 Gain (Min) (V/V) 5 Gain (Max) (V/V) 10000 Noise at 1 kHz (Typ) (nV/rt (Hz)) 60 CMRR (Min) (dB) 83 Input offset drift (+/-) (Max) (uV/C) 3 Input bias current (+/-) (Max) (nA) 25 Iq (Typ) (mA) 0.06 Bandwidth at min gain (Typ) (MHz) 0.12 Gain error (+/-) (Max) (%) 0.15 Operating temperature range (C) -40 to 85 Noise at 0.1 Hz-10 Hz (Typ) (uVpp) 2 Gain non-linearity (+/-) (Max) (%) 0.002 open-in-new Find other Instrumentation amplifiers

Package | Pins | Size

PDIP (P) 8 93 mm² 9.81 x 9.43 SOIC (D) 8 19 mm² 3.91 x 4.9 open-in-new Find other Instrumentation amplifiers

Features

  • LOW QUIESCENT CURRENT: 60µA
  • WIDE POWER SUPPLY RANGE
    • Single Supply: 2.2V to 36V
    • Dual Supply: -0.9/+1.3V to ±18V
  • COMMON-MODE RANGE to (V-)-0.1V
  • RAIL-TO-RAIL OUTPUT SWING
  • LOW OFFSET VOLTAGE: 250µV max
  • LOW OFFSET DRIFT: 3µV/°C max
  • LOW NOISE: 60nV/sqrt(Hz)
  • LOW INPUT BIAS CURRENT: 25nA max
  • 8-PIN DIP AND SO-8 SURFACE-MOUNT
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Description

The INA122 is a precision instrumentation amplifier for accurate, low noise differential signal acquisition. Its two-op-amp design provides excellent performance with very low quiescent current, and is ideal for portable instrumentation and data acquisition systems.

The INA122 can be operated with single power supplies from 2.2V to 36V and quiescent current is a mere 60µA. It can also be operated from dual supplies. By utilizing an input level-shift network, input common-mode range extends to 0.1V below negative rail (single supply ground).

A single external resistor sets gain from 5V/V to 10000V/V. Laser trimming provides very low offset voltage (250µV max), offset voltage drift (3µV/°C max) and excellent common-mode rejection.

Packages options include 8-pin plastic DIP and SO-8 surface-mount packages. Both are specified for the -40°C to +85°C extended industrial temperature range.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 9
Type Title Date
* Datasheet Single Supply, MicroPower Instrumentation Amplifier datasheet Sep. 27, 2000
Technical articles What is an instrumentation amplifier? Aug. 09, 2019
White papers The Signal e-book: A compendium of blog posts on op amp design topics Mar. 28, 2017
Technical articles How to layout a PCB for an instrumentation amplifier Oct. 14, 2016
User guides Universal Instrumentation Amplifier EVM User’s Guide (Rev. B) Aug. 09, 2016
Application notes 4Q 2015 Analog Applications Journal Oct. 30, 2015
Application notes VCM vs. VOUT plots for instrumentation amplifiers with two op amps Oct. 30, 2015
Technical articles Dealing with rejection: Instrumentation amplifier PSRR and CMRR (Part I) Nov. 25, 2013
User guides Universal Instrumentation Amplifier EVM User’s Guide Sep. 11, 2013

Design & development

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

Hardware development

EVALUATION BOARDS Download
Description

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 below for compatible TI INA’s. Note (...)

Design tools & simulation

SIMULATION MODELS Download
SBOC142B.TSC (67 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOM019A.ZIP (54 KB) - PSpice Model
SIMULATION MODELS Download
SBOM211A.ZIP (4 KB) - TINA-TI Spice Model
SIMULATION TOOLS Download
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 (...)
Features
  • 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
  • (...)
SIMULATION TOOLS Download
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
CALCULATION TOOLS Download
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 (...)
Features
  • 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
  • (...)
CALCULATION TOOLS Download
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 (...)

Features
  • 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
CALCULATION TOOLS Download
SBOC452I.ZIP (209503 KB)

CAD/CAE symbols

Package Pins Download
PDIP (P) 8 View options
SOIC (D) 8 View options

Ordering & quality

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