1 Evaluation Module Overview
1.1 Introduction
The EVM is an easy-to-use platform for evaluating the main features and performance of the INA220. 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.
This user’s guide describes the characteristics, operation, and use of the INA220 evaluation module (EVM).
This EVM is designed to evaluate the performance of the INA220. Throughout this document, the terms
evaluation board, evaluation module, and EVM are synonymous with the INA220EVM. This document includes a
schematic, reference printed circuit board (PCB) layouts, and a complete bill of materials (BOM).
1.2 Kit Contents
Table 1-1 lists the contents of the EVM kit. Contact your nearest Texas Instruments Product Information Center if
any component is missing.
Table 1-1. Kit Contents
ITEM QUANTITY
INA220EVM test board 1
Note that this EVM requires the TI Sensor Control Board (SCB), which is sold separately.
1.3 Specification
The EVM is intended to provide basic functional evaluation of the device. The layout is not intended to be a
model for the target circuit, nor 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 INA220 installed. The
smaller PCB is referred to as the SCB Controller, and is used to interface the EVM with the GUI.
1.4 Device Information
The INA220 is a current shunt and power monitor with an I2C- or SMBUS-compatible interface. The INA220
monitors both shunt drop and supply voltage. A programmable calibration value, combined with an internal
multiplier, enables direct readouts in amperes. An additional multiplying register calculates power in watts. The
I2C- or SMBUS-compatible interface features 16 programmable addresses. The separate shunt input on the
INA220 allows to be used in systems with low-side sensing.
The INA220 is available in two grades: A and B. The B grade version has higher accuracy and higher precision
specifications.
The INA220 senses across shunts on buses that can vary from 0 to 26 V, useful for low-side sensing or CPU
power supplies. The device uses a single 3- to 5.5-V supply, drawing a maximum of 1 mA of supply current. The
INA220 operates from –40°C to 125°C.
Table 1-2. Device Summary
PRODUCT
DIGITAL
PROTOCOL
ADC
RESOLUTION
MAX GAIN
ERROR
MAX OFFSET
VOLTAGE
INA220 I2C 12-bit 0.3%, 0.5% ±50 µV, ±100µV
Evaluation Module Overview www.ti.com
2INA220 Evaluation Module SBOU309 – AUGUST 2023
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