INA226 High-Precision Bidirectional Current Power Monitor Module

The INA226 targets the same job as the INA219 - reading current and power over I2C without hand-calculating it from a raw shunt voltage - with a higher common-mode voltage rating of 36V, which matters on higher-voltage battery packs and power rails an INA219's 26V ceiling would exceed. A 10 microvolt maximum input offset and 126dB common-mode rejection ratio give it real precision for detecting small current changes against a noisy supply rail.

Like the INA219, it reads current bidirectionally, so it tracks both charge and discharge current on a battery system rather than only one direction of flow, and the I2C interface supports speeds up to 3.4MHz for fast polling when a project needs frequent readings rather than occasional samples.

Common uses are precision battery monitoring on higher-voltage packs, power supply diagnostics, and any project needing more headroom or accuracy than a basic current sensor provides.