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Product details

Parameters

Number of channels (#) 1 Vs (Max) (V) 36 Vs (Min) (V) 2.7 Input offset (+/-) (Max) (uV) 50 Gain (Min) (V/V) 1 Gain (Max) (V/V) 10000 Noise at 1 kHz (Typ) (nV/rt (Hz)) 10 CMRR (Min) (dB) 110 Input offset drift (+/-) (Max) (uV/C) 0.5 Input bias current (+/-) (Max) (nA) 5 Iq (Typ) (mA) 0.35 Bandwidth at min gain (Typ) (MHz) 0.8 Gain error (+/-) (Max) (%) 1 Operating temperature range (C) -40 to 85 Noise at 0.1 Hz-10 Hz (Typ) (uVpp) 0.28 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

  • A newer version of this device is now available: INA818
  • Low offset voltage: 50 µV, maximum
  • Low drift: 0.5 µV/°C, maximum
  • Low input bias current: 5 nA, maximum
  • High CMR: 110 dB, minimum
  • Inputs protected to ±40 V
  • Wide supply range: ±1.35 to ±18 V
  • Low quiescent current: 350 µA
  • Packages: 8-Pin plastic DIP, SO-8

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Description

The INA118 is a low-power, general-purpose instrumentation amplifier offering excellent accuracy. The versatile, three op amp design and small size make this device an excellent choice for a wide range of applications. Current-feedback input circuitry provides wide bandwidth, even at high gain (70 kHz at G = 100).

A single external resistor sets any gain from 1 to 10000. Internal input protection can withstand up to ±40 V without damage.

The INA118 is laser-trimmed for low offset voltage (50 µV), drift (0.5 µV/°C), and high common-mode rejection (110 dB at G = 1000). The INA118 operates with power supplies as low as ±1.35 V, and quiescent current is only 350 µA, making this device an excellent choice for battery-operated systems.

The INA118 is available in 8-pin plastic DIP and SO-8 surface-mount packages, and specified for the –40°C to +85°C temperature range.

The upgraded INA818 offers a lower input stage offset voltage (35 µV, maximum), lower input bias current (0.5 nA maximum) and lower noise (8 nV/√Hz) at the same quiescent current. See the Device Comparison Table for a selection of precision instrumentation amplifiers from Texas Instruments.

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Exact equivalent in functionality and parametrics to the compared device:
INA818 ACTIVE Low power (350-µA), precision instrumentation amp with ±60-V overvoltage protection (gain pins 1, 8) Pin-to-pin device with higher GBW (2MHz), higher DC precision (35µV max Vos, 0.4 µV/C max drift), higher CMRR (140dB Min) and lower bias current (0.5nA max)

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 INA118 Precision, Low-Power Instrumentation Amplifier datasheet (Rev. B) Apr. 29, 2019
Technical articles What is an instrumentation amplifier? Aug. 09, 2019
Application note Comprehensive Error Calculation for Instrumentation Amplifiers Mar. 26, 2019
E-book 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 guide Universal Instrumentation Amplifier EVM User’s Guide (Rev. B) Aug. 09, 2016
Technical articles Dealing with rejection: Instrumentation amplifier PSRR and CMRR (Part I) Nov. 25, 2013
User guide Universal Instrumentation Amplifier EVM User’s Guide Sep. 11, 2013
Application note Getting the most out of your instrumentation amplifier design Oct. 10, 2005

Design & development

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

Hardware development

EVALUATION BOARD 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 MODEL Download
SBFC023A.ZIP (5 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SBOC151B.TSC (109 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SBOM016A.ZIP (55 KB) - PSpice Model
SIMULATION TOOL 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 TOOL 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 (...)
CALCULATION TOOL 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 TOOL 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

Reference designs

REFERENCE DESIGNS Download
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document-generic Schematic

CAD/CAE symbols

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

Ordering & quality

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  • Ongoing reliability monitoring

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