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Product details

Parameters

Common mode voltage (Max) (V) 28 Common mode voltage (Min) (V) 0 Input offset (+/-) (Max) (uV) 50 Input offset drift (+/-) (Typ) (uV/C) 0.1 Gain (V/V) 1 Gain error (%) 0.5 Gain error drift (+/-) (Max) (ppm/°C) 50 CMRR (Min) (dB) 100 Bandwidth (kHz) 3.5 Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 0.42 Digital interface I2C, SMBus Features Alert Function, Bi-directional, Low-side Capable Resolution (Bits) 16 Rating Catalog Operating temperature range (C) -40 to 125 open-in-new Find other Current/voltage/power monitors

Package | Pins | Size

DSBGA (YFD) 12 2 mm² 1.428 x 1.684 DSBGA (YFF) 12 2 mm² 1.428 x 1.684 open-in-new Find other Current/voltage/power monitors

Features

  • Bus Voltage Sensing From 0 V to 28 V
  • High- or Low-Side Sensing
  • Current, Voltage, and Power Reporting
  • High Accuracy:
    • 0.5% Gain Error (Max)
    • 50-µV Offset (Max)
  • Configurable Averaging Options
  • Programmable Alert Threshold
  • 1.8-V I2C Compliant
  • Power-Supply Operation: 2.7 V to 5.5 V
  • Start-Up Mode Options:
    • INA231A: Active Conversion
    • INA231B: Low-Current Power Down

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Description

The INA231 is a current-shunt and power monitor with a 1.8-V compliant I2C interface that features 16 programmable addresses. The INA231 monitors both shunt voltage drops and bus supply voltage, providing increased protection by asserting the ALERT pin if the values are outside the programmed range. Programmable calibration value, conversion time, and averaging, combined with an internal multiplier, enable direct readouts of current in amperes and power in watts, thus reducing host processing.

The INA231 senses current on bus voltages that vary from 0 V to 28 V, with the device powered from a single 2.7-V to 5.5-V supply, drawing 330 µA (typical) of supply current. The INA231 is specified over the operating temperature range of –40°C to +125°C.

The INA231 is available in two versions: the INA231A starts up performing continuous conversions of the shunt and bus voltage, whereas the INA231B starts up in low-current, power-down mode.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet INA231 High- or Low-Side Measurement, Bidirectional Current and Power Monitor With 1.8-V I2C Interface datasheet (Rev. C) Mar. 22, 2018
White papers Simplifying Current Sensing (Rev. A) Jan. 09, 2020
Application notes Precision, Low-Side Current Measurement (Rev. B) Mar. 06, 2019
Application notes External current sense amps vs integrated onboard amplifiers for current sensing (Rev. B) Feb. 19, 2019
Technical articles A key to accurate system thermal management: monitoring both current flow and temperature Oct. 04, 2018
Selection guides Current Sense Amplifiers (Rev. D) Apr. 04, 2018
User guides –48-V Telecom Current, Voltage, and Power Sense With Isolation Reference Design (Rev. A) Sep. 28, 2017
Application notes Digital Interfaces for Current Sensing Devices Jun. 30, 2017
Technical articles System trade-offs for high- and low-side current measurements Jun. 01, 2017
Application notes Energy and Power Monitoring with Digital Current Sensors May 25, 2017
Application notes Integrated, Current Sensing Analog-to-Digital Converter Dec. 21, 2016
Application notes Integrating The Current Sensing Signal Path (Rev. A) Dec. 02, 2016
Technical articles Why should you care about overcurrent protection in your system? Jun. 16, 2016
Application notes Understanding the I2C Bus Jun. 30, 2015
Technical articles How to get started with current sense amplifiers – part 2 May 26, 2015
User guides INA231EVM User's Guide Jan. 23, 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
INA231EVM
INA231EVM
document-generic User guide
75
Description

The INA231EVM is a platform for evaluating the performance of the INA231 under various signal, shunt, and supply conditions.

Features
  • USB Power and I/O
  • Small Form Factor
  • Simple Software Interface
  • GUIS FOR EVALUATION MODULES (EVM) Download
    SBOC434.ZIP (132172 KB)

    Design tools & simulation

    SIMULATION MODELS Download
    SBOM805.ZIP (45 KB) - IBIS 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

    Reference designs

    REFERENCE DESIGNS Download
    Ultrasound smart probe power supply reference design
    TIDA-010057 — Significant technological advancements and high degree of integration in Medical imaging, especially hand-held ultrasound smart probes, are pushing engineers to come up with highly-efficient, noise immune power solutions in a small size. This reference design documents end to end power and data (...)
    document-generic Schematic document-generic User guide

    CAD/CAE symbols

    Package Pins Download
    DSBGA (YFD) 12 View options
    DSBGA (YFF) 12 View options

    Ordering & quality

    Support & training

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