This user’s guide describes the characteristics, operation, and use of the INA226 evaluation module (EVM). This EVM is designed to evaluate the performance of the INA226. Throughout this document, the terms evaluation board, evaluation module, and EVM are synonymous with the INA226EVM. This document includes a schematic, reference printed circuit board (PCB) layouts, and a complete bill of materials (BOM).
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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.
| PRODUCT | DIGITAL PROTOCOL | ADC RESOLUTION | MAX GAIN ERROR | MAX OFFSET VOLTAGE |
|---|---|---|---|---|
| INA226 | I2C | 16-bit | 0.1% | ±10 µV |
Table 2-2 lists the contents of the EVM kit. Contact your nearest Texas Instruments Product Information Center if any component is missing.
| ITEM | QUANTITY |
|---|---|
| INA226EVM test board | 1 |
Note that this EVM requires the TI Sensor Control Board (SCB), which is sold separately.