Product details


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


  • 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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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

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Type Title Date
* Data sheet INA231 High- or Low-Side Measurement, Bidirectional Current and Power Monitor With 1.8-V I2C Interface datasheet (Rev. C) Mar. 22, 2018
Technical article Solving the multidecade current-measurement challenge in your 48-V BMS application Jun. 14, 2021
Application note Getting Started with Digital Power Monitors Mar. 12, 2021
Technical article How current-sense amplifiers monitor satellite health Feb. 08, 2021
E-book Simplifying Current Sensing (Rev. A) Jan. 09, 2020
Application note Precision, Low-Side Current Measurement (Rev. B) Mar. 06, 2019
Application note External current sense amps vs integrated onboard amplifiers for current sensing (Rev. B) Feb. 19, 2019
Technical article A key to accurate system thermal management: monitoring both current flow and temperature Oct. 04, 2018
Selection guide Current Sense Amplifiers (Rev. D) Apr. 04, 2018
User guide –48-V Telecom Current, Voltage, and Power Sense With Isolation Reference Design (Rev. A) Sep. 28, 2017
Application note Digital Interfaces for Current Sensing Devices Jun. 30, 2017
Technical article System trade-offs for high- and low-side current measurements Jun. 01, 2017
Application note Energy and Power Monitoring with Digital Current Sensors May 25, 2017
Application note Integrated, Current Sensing Analog-to-Digital Converter Dec. 21, 2016
Application note Integrating The Current Sensing Signal Path (Rev. A) Dec. 02, 2016
Application note Understanding the I2C Bus Jun. 30, 2015
User guide 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

document-generic User guide

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

  • USB Power and I/O
  • Small Form Factor
  • Simple Software Interface
  • Software development

    SBOC434.ZIP (132172 KB)

    Design tools & simulation

    SBOM805.ZIP (45 KB) - IBIS Model
    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
    SBOR020C.ZIP (568 KB)
    SBOR021.ZIP (266 KB)

    Reference designs

    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

    Information included:
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    • REACH
    • Device marking
    • Lead finish/Ball material
    • MSL rating/Peak reflow
    • MTBF/FIT estimates
    • Material content
    • Qualification summary
    • Ongoing reliability monitoring

    Support & training

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