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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 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 3 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 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 3 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 x 6 SOT-23 (DCN) 8 4.64 mm² 2.9 x 1.6
  • 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 11 Oct 2014
Application note Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML 18 Nov 2024
Application brief How to optimize PoE systems using discrete current sensing PDF | HTML 27 Jan 2023
User guide Migration From INA219 to INA232 PDF | HTML 24 Jan 2023
Application brief Current Sensing in Mobile Robots PDF | HTML 29 Nov 2022
E-book An Engineer's Guide to Current Sensing (Rev. B) 12 Apr 2022
Application note Using a PCB Copper Trace as a Current-Sense Shunt Resistor PDF | HTML 25 Jan 2022
Application note Digital Interfaces for Current Sensing Devices (Rev. A) PDF | HTML 30 Sep 2021
Application brief Integrating the Current Sensing Signal Path (Rev. B) PDF | HTML 29 Sep 2021
Application brief Integrated, Current Sensing Analog-to-Digital Converter (Rev. A) PDF | HTML 28 Sep 2021
Application note Getting Started with Digital Power Monitors (Rev. A) PDF | HTML 02 Sep 2021
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application brief Energy and Power Monitoring with Digital Current Sensors 25 May 2017
Application note Understanding the I2C Bus PDF | HTML 30 Jun 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
Not available on TI.com
Code example or demo

SBOC270 — INA219EVM Source Code

Supported products & hardware

Supported products & hardware
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GUI for evaluation module (EVM)

SBOC271 — INA219EVM Software

Supported products & hardware

Supported products & hardware
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Simulation model

INA219 IBIS Model

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

ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)

Supported products & hardware

Supported products & hardware
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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 (...)
Supported products & hardware

Supported products & hardware
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Calculation tool

SBOR021 — Power Monitor Tool

Power Monitor Tool
Supported products & hardware

Supported products & hardware
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Schematic

INA219EVM Schematic

SBOR006.PDF (32 KB)
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
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Simulation tool

TINA-TI — SPICE-based analog simulation program

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 (...)
User guide: PDF
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Reference designs

TIDA-00818 — Mobile Point of Sale (mPOS) Power Reference Design

The TIDA-00818 is mobile point of sale (mPOS) reference design features a 1S1P Li-Ion battery architecture to reduce system size and cost. Integrated load switches are used to reduce standby power consumption and maximize battery life to enable the single-cell architecture. A USB Type-C charging (...)
Design guide: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
SOIC (D) 8 Ultra Librarian
SOT-23 (DCN) 8 Ultra Librarian
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