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Product details

Parameters

Common mode voltage (Max) (V) 26 Common mode voltage (Min) (V) -0.2 Input offset (+/-) (Max) (uV) 150 Input offset drift (+/-) (Typ) (uV/C) 0.2 Gain (V/V) 100, 20, 200, 50 Gain error (%) 1 Gain error drift (+/-) (Max) (ppm/°C) 20 CMRR (Min) (dB) 84 Bandwidth (kHz) 350, 210, 150, 105 Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 0.5 Number of channels (#) 2 Comparators (#) 0 Features Bi-directional, Dual channel, Low-side Capable Rating Catalog Operating temperature range (C) -40 to 125 open-in-new Find other Current sense amplifiers analog output

Package | Pins | Size

VSSOP (DGS) 10 9 mm² 3 x 3 WSON (DSQ) 10 4 mm² 2 x 2 open-in-new Find other Current sense amplifiers analog output

Features

  • Common-mode range (VCM): –0.2 V to +26 V
  • High bandwidth: 350 kHz (A1 devices)
  • Offset voltage:
    • ±150 µV (maximum) at VCM = 0 V
    • ±500 µV (maximum) at VCM = 12 V
  • Output slew rate: 2 V/µs
  • Bidirectional current-sensing capability
  • Accuracy:
    • ±1% gain error (maximum)
    • 1-µV/°C offset drift (maximum)
  • Gain options:
    • 20 V/V (A1 devices)
    • 50 V/V (A2 devices)
    • 100 V/V (A3 devices)
    • 200 V/V (A4 devices)
  • Quiescent current: 260 µA maximum (INA181)

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Description

The INA181, INA2181, and INA4181 (INAx181) current sense amplifiers are designed for cost-optimized applications. These devices are part of a family of bidirectional, current-sense amplifiers (also called current-shunt monitors) that sense voltage drops across current-sense resistors at common-mode voltages from –0.2 V to +26 V, independent of the supply voltage. The INAx181 family integrates a matched resistor gain network in four, fixed-gain device options: 20 V/V, 50 V/V, 100 V/V, or 200 V/V. This matched gain resistor network minimizes gain error and reduces the temperature drift.

These devices operate from a single 2.7-V to 5.5-V power supply. The single-channel INA181 draws a maximum supply current of 260 µA; whereas, the dual-channel INA2181 draws a maximum supply current of 500 µA, and the quad-channel INA4181 draws a maximum supply current of 900 µA.

The INA181 is available in a 6-pin, SOT-23 package. The INA2181 is available in 10-pin, VSSOP and WSON packages. The INA4181 is available in a 20-pin, TSSOP package. All device options are specified over the extended operating temperature range of –40°C to +125°C.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet INAx181 Bidirectional, Low- and High-Side Voltage Output, Current-Sense Amplifiers datasheet (Rev. G) May 05, 2020
White papers Ein Techniker-Leitfaden für Industrieroboter-Designs Mar. 25, 2020
White papers E-book: An engineer’s guide to industrial robot designs Feb. 12, 2020
White papers Simplifying Current Sensing (Rev. A) Jan. 09, 2020
Application notes Bidirectional, Low-Side Phase Current Sensing With Onboard Overcurrent Detection (Rev. D) Mar. 06, 2019
Technical articles A key to accurate system thermal management: monitoring both current flow and temperature Oct. 04, 2018
Application notes Low-drift, low-side, bidirectional current sensing circuit with integrated preci Jun. 28, 2018
Selection guides Current Sense Amplifiers (Rev. D) Apr. 04, 2018
Application notes Common Uses for Multichannel Current Monitoring Dec. 19, 2017
Application notes Closed-Loop Analysis of Load-Induced Amplifier Stability Issues Using Zout Oct. 27, 2017
User guides INA2180-2181 Evaluation Module User's Guide Aug. 25, 2017
Application notes Low Cost Bidirectional Current Sensing Using INA181 Jul. 28, 2017
Technical articles System trade-offs for high- and low-side current measurements Jun. 01, 2017
Application notes Low-Side Current Sense Circuit Integration Mar. 30, 2017
Technical articles Why should you care about overcurrent protection in your system? Jun. 16, 2016
Technical articles How to get started with current sense amplifiers – part 2 May 26, 2015

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
29
Description
The INA2180 is an integrated current sense monitor solution that provides ease of use and high performance for cost-sensitive applications. The INA2181 shares the same capabilities with the support for bidirectional current measurements. The INA2180-2181EVM is intended to provide basic functional (...)
Features
  • Evaluation of the INA2180x and INA2181x in all gain options
  • Test points to allow ease of acess to device pins
  • Capability to evaluate both high and low-side configurations

Design tools & simulation

SIMULATION MODELS Download
SBOMAD3A.ZIP (35 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SBOMAD4B.TSC (2820 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOMAD5B.ZIP (2070 KB) - PSpice 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

CAD/CAE symbols

Package Pins Download
VSSOP (DGS) 10 View options
WSON (DSQ) 10 View options

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