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INA219

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26-V 12-bit I2C output digital power monitor

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Data sheet

INA219

ACTIVE
Data sheet Order now

Product details

Common-mode voltage (max) (V) 26 Common-mode voltage (min) (V) 0 Digital interface I2C, SMBus Resolution (Bits) 12 Input offset (±) (max) (µV) 50, 100 Input offset drift (±) (max) (µV/°C) 0.5 Input offset drift (±) (typ) (µV/°C) 0.1 Voltage gain (V/V) 0.125, 0.25, 0.5, 1 CMRR (min) (dB) 100 Iq (max) (mA) 1 Gain error (%) 0.3, 0.5 Gain error drift (±) (max) (ppm/°C) 83, 167 Features Bidirectional, Intergrated Power Monitor, Programmable Gain Number of channels 1 Power measurement accuracy (%) 0.8, 1 Rating Catalog Operating temperature range (°C) -40 to 125
Common-mode voltage (max) (V) 26 Common-mode voltage (min) (V) 0 Digital interface I2C, SMBus Resolution (Bits) 12 Input offset (±) (max) (µV) 50, 100 Input offset drift (±) (max) (µV/°C) 0.5 Input offset drift (±) (typ) (µV/°C) 0.1 Voltage gain (V/V) 0.125, 0.25, 0.5, 1 CMRR (min) (dB) 100 Iq (max) (mA) 1 Gain error (%) 0.3, 0.5 Gain error drift (±) (max) (ppm/°C) 83, 167 Features Bidirectional, Intergrated Power Monitor, Programmable Gain Number of channels 1 Power measurement accuracy (%) 0.8, 1 Rating Catalog Operating temperature range (°C) -40 to 125
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm) SOT-23 (DCN) 8 4.64 mm² (2.9 mm × 1.6 mm)
  • Senses Bus Voltages from 0 to 26 V
  • Reports Current, Voltage, and Power
  • 16 Programmable Addresses
  • High Accuracy: 0.5% (Maximum) Over
    Temperature (INA219B)
  • Filtering Options
  • Calibration Registers
  • SOT23-8 and SOIC-8 Packages
  • Senses Bus Voltages from 0 to 26 V
  • Reports Current, Voltage, and Power
  • 16 Programmable Addresses
  • High Accuracy: 0.5% (Maximum) Over
    Temperature (INA219B)
  • Filtering Options
  • Calibration Registers
  • SOT23-8 and SOIC-8 Packages

The INA219 is a current shunt and power monitor with an I2C- or SMBUS-compatible interface. The device monitors both shunt voltage drop and bus supply voltage, with programmable conversion times and filtering. A programmable calibration value, combined with an internal multiplier, enables direct readouts of current in amperes. An additional multiplying register calculates power in watts. The I2C- or SMBUS-compatible interface features 16 programmable addresses.

The INA219 is available in two grades: A and B. The B grade version has higher accuracy and higher precision specifications.

The INA219 senses across shunts on buses that can vary from 0 to 26 V. The device uses a single 3- to 5.5-V supply, drawing a maximum of 1 mA of supply current. The INA219 operates from –40°C to 125°C.

The INA219 is a current shunt and power monitor with an I2C- or SMBUS-compatible interface. The device monitors both shunt voltage drop and bus supply voltage, with programmable conversion times and filtering. A programmable calibration value, combined with an internal multiplier, enables direct readouts of current in amperes. An additional multiplying register calculates power in watts. The I2C- or SMBUS-compatible interface features 16 programmable addresses.

The INA219 is available in two grades: A and B. The B grade version has higher accuracy and higher precision specifications.

The INA219 senses across shunts on buses that can vary from 0 to 26 V. The device uses a single 3- to 5.5-V supply, drawing a maximum of 1 mA of supply current. The INA219 operates from –40°C to 125°C.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet INA219 Zerø-Drift, Bidirectional Current/Power Monitor With I2C Interface datasheet (Rev. G) PDF | HTML Oct 11, 2014
Application note Using a PCB Copper Trace as a Current Sense Shunt Resistor (Rev. A) PDF | HTML Apr 27, 2026
Application note Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML Nov 18, 2024
Application brief How to optimize PoE systems using discrete current sensing PDF | HTML Jan 27, 2023
User guide Migration From INA219 to INA232 PDF | HTML Jan 24, 2023
Application brief Current Sensing in Mobile Robots PDF | HTML Nov 29, 2022
E-book An Engineer's Guide to Current Sensing (Rev. B) Apr 12, 2022
Application note Digital Interfaces for Current Sensing Devices (Rev. A) PDF | HTML Sep 30, 2021
Application brief Integrating the Current Sensing Signal Path (Rev. B) PDF | HTML Sep 29, 2021
Application brief Integrated, Current Sensing Analog-to-Digital Converter (Rev. A) PDF | HTML Sep 28, 2021
Application note Getting Started with Digital Power Monitors (Rev. A) PDF | HTML Sep 2, 2021
Selection guide Power Management Guide 2018 (Rev. R) Jun 25, 2018
Application brief Energy and Power Monitoring with Digital Current Sensors May 25, 2017
Application note Understanding the I2C Bus PDF | HTML Jun 30, 2015

Design & development

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

Evaluation board

INA219EVM — INA219 evaluation module

The INA219 evaluation module (EVM) is an easy-to-use platform to evaluate the main features and performance of the INA219. The EVM supports current measurements up to 10A and comes with graphical user interface (GUI) support to read and write to device registers.
User guide: PDF | HTML
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Code example or demo

SBOC270 — INA219EVM Source Code

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GUI for evaluation module (EVM)

SBOC271 — INA219EVM Software

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Simulation model

INA219 IBIS Model

SBOM418.ZIP (24 KB) - IBIS model
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Calculation tool

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Calculation tool

CS-AMPLIFIER-ERROR-TOOL — Current Sense Amplifier Comparison and Error Tool

This Excel calculator provides a comparison between two and five of our standard current sense amplifiers, delivering a chart containing the basic parameters of each device. This calculator also takes system condition inputs from users such as common-mode voltage, supply voltage, shunt resistor (...)
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Reference design

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