2 Overview
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°C and features up
to 16 programmable addresses on the I2C-compatible interface.
Table 2-1. Device Summary
PRODUCT
DIGITAL
PROTOCOL
ADC
RESOLUTION
MAX GAIN
ERROR
MAX OFFSET
VOLTAGE
INA226 I2C 16-bit 0.1% ±10 µV
2.1 Kit Contents
Table 2-2 lists the contents of the EVM kit. Contact your nearest Texas Instruments Product Information Center if
any component is missing.
Table 2-2. Kit Contents
ITEM QUANTITY
INA226EVM test board 1
Note that this EVM requires the TI Sensor Control Board (SCB), which is sold separately.
2.2 Related Documentation From Texas Instruments
This user's guide is available from the TI website under literature number SBOU276. Any letter appended to the
literature number corresponds to the document revision that is current at the time of the writing of this document.
Newer revisions are available from www.ti.com or the Texas Instruments' Literature Response Center at (800)
477-8924 or the Product Information Center at (972) 644-5580. When ordering, identify the document by both
title and literature number. Table 2-3 lists documentation related to the EVM. Click the links in Table 2-3 for
further information. The device name links to the product web folder on www.ti.com. The literature number links
to the document PDF.
Table 2-3. Related Documentation
DOCUMENT TITLE
DOCUMENT
LITERATURE
NUMBER
INA226 data sheet SBOS547
INA226-Q1 data sheet SBOS743
Getting Started with Digital Power Monitors SBOA511
3 Hardware
The EVM is an easy-to-use platform for evaluating the main features and performance of the INA226. The EVM
supports current measurements up to 10 amps through the PCB, and includes a graphical user interface (GUI)
used to read and write device registers as well as view and save results data.
The EVM is intended to provide basic functional evaluation of the devices. The layout is not intended to be a
model for the target circuit, nor is it laid out for electromagnetic compatibility (EMC) testing. The EVM consists of
two printed-circuit boards (PCBs). The larger PCB is referred to as the EVM, and has the INA226 installed. The
smaller PCB is referred to as the SCB Controller, and is used to interface the EVM with the GUI.
www.ti.com Overview
SBOU276 – JANUARY 2023
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INA226EVM User’s Guide 3
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