Product details

Common mode voltage (Max) (V) 36 Common mode voltage (Min) (V) 0 Input offset (+/-) (Max) (uV) 10 Input offset drift (+/-) (Typ) (uV/C) 0.02 Gain (V/V) 1 Gain error (%) 0.1 Gain error drift (+/-) (Max) (ppm/°C) 50 CMRR (Min) (dB) 126 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, Ultra precise Resolution (Bits) 16 Rating Catalog Operating temperature range (C) -40 to 125
Common mode voltage (Max) (V) 36 Common mode voltage (Min) (V) 0 Input offset (+/-) (Max) (uV) 10 Input offset drift (+/-) (Typ) (uV/C) 0.02 Gain (V/V) 1 Gain error (%) 0.1 Gain error drift (+/-) (Max) (ppm/°C) 50 CMRR (Min) (dB) 126 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, Ultra precise Resolution (Bits) 16 Rating Catalog Operating temperature range (C) -40 to 125
VSSOP (DGS) 10 9 mm² 3 x 3
  • Senses Bus Voltages From 0 V to 36 V
  • High-Side or Low-Side Sensing
  • Reports Current, Voltage, and Power
  • High Accuracy:
    • 0.1% Gain Error (Max)
    • 10 µV Offset (Max)
  • Configurable Averaging Options
  • 16 Programmable Addresses
  • Operates from 2.7-V to 5.5-V Power Supply
  • 10-Pin, DGS (VSSOP) Package
  • Senses Bus Voltages From 0 V to 36 V
  • High-Side or Low-Side Sensing
  • Reports Current, Voltage, and Power
  • High Accuracy:
    • 0.1% Gain Error (Max)
    • 10 µV Offset (Max)
  • Configurable Averaging Options
  • 16 Programmable Addresses
  • Operates from 2.7-V to 5.5-V Power Supply
  • 10-Pin, DGS (VSSOP) Package

The INA226 is a current shunt and power monitor with an I2C™- or SMBUS-compatible interface. The device monitors both a shunt voltage drop and bus supply voltage. Programmable calibration value, conversion times, and averaging, combined with an internal multiplier, enable direct readouts of current in amperes and power in watts.

The INA226 senses current on common-mode bus voltages that can vary from 0 V to 36 V, independent of the supply voltage. The device operates from a single 2.7-V to 5.5-V supply, drawing a typical of 330 µA of supply current. The device is specified over the operating temperature range between –40°C and 125\xC2°C and features up to 16 programmable addresses on the I2C-compatible interface.

The INA226 is a current shunt and power monitor with an I2C™- or SMBUS-compatible interface. The device monitors both a shunt voltage drop and bus supply voltage. Programmable calibration value, conversion times, and averaging, combined with an internal multiplier, enable direct readouts of current in amperes and power in watts.

The INA226 senses current on common-mode bus voltages that can vary from 0 V to 36 V, independent of the supply voltage. The device operates from a single 2.7-V to 5.5-V supply, drawing a typical of 330 µA of supply current. The device is specified over the operating temperature range between –40°C and 125\xC2°C and features up to 16 programmable addresses on the I2C-compatible interface.

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Technical documentation

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Type Title Date
* Data sheet INA226 High-Side or Low-Side Measurement, Bi-Directional Current and Power Monitor with I2C Compatible Interface datasheet (Rev. A) 19 Sep 2014
Application note Digital Interfaces for Current Sensing Devices (Rev. A) 30 Sep 2021
Application note Integrating the Current Sensing Signal Path (Rev. B) 29 Sep 2021
Application note Integrated, Current Sensing Analog-to-Digital Converter (Rev. A) 28 Sep 2021
Selection guide Current Sense Amplifiers (Rev. E) 20 Sep 2021
Application note Getting Started with Digital Power Monitors (Rev. A) 02 Sep 2021
Technical article Solving the multidecade current-measurement challenge in your 48-V BMS application 14 Jun 2021
Technical article How current-sense amplifiers monitor satellite health 08 Feb 2021
Application note Current Sensing Applications in Communication Infrastructure Equipment (Rev. A) 29 Dec 2020
Application note Improving Power Amplifier Efficiency with Current Monitors (Rev. A) 29 Dec 2020
E-book Simplifying Current Sensing (Rev. A) 09 Jan 2020
Technical article How current sensors help monitor and protect the world’s wireless infrastructure 30 Dec 2019
Application note Precision, Low-Side Current Measurement (Rev. B) 06 Mar 2019
Application note External current sense amps vs integrated onboard amplifiers for current sensing (Rev. B) 19 Feb 2019
Technical article A key to accurate system thermal management: monitoring both current flow and temperature 04 Oct 2018
Application note Integrating a Current Sense Resistor With a Current Sense Amplifier (Rev. B) 20 Jul 2018
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
User guide IMETER-BOOST User's Guide (Rev. A) 09 Mar 2018
Design guide –48-V Telecom Current, Voltage, and Power Sense With Isolation Reference Design (Rev. A) 28 Sep 2017
Application note Extending Common-Mode Range of Current-Sense Amplifiers 06 Jul 2017
Application note Energy and Power Monitoring with Digital Current Sensors 25 May 2017
White paper Overcurrent protection enables more efficient and reliable systems 16 May 2016
Application notes Applying I²C Compatible Temperature Sensors in Systems with Slow Clock Edges 01 Dec 2015
Application note Understanding the I2C Bus 30 Jun 2015
Analog design journal System telemetry: What, why and how? 11 Apr 2014
User guide INA226EVM User Guide 24 Jun 2011

Design & development

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Code example or demo

INA226EVM Source Code

SBOC410.ZIP (2080 KB)
GUI for evaluation module (EVM)

INA226EVM Software

SBOC409.ZIP (89834 KB)
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INA226 IBIS Model

SBOM458.ZIP (34 KB) - IBIS Model
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SBOR021.ZIP (266 KB)
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