TIINA3221AIRGVR
Overview
The INA3221AIRGVR is a triple-channel, high-side current and bus voltage monitor with an I2C and SMBus-compatible interface. It is designed to monitor both shunt voltage drops and bus supply voltages ranging from 0V to 26V across three independent channels. The device features programmable alerting for critical, warning, and power-valid conditions to simplify system-level power monitoring.
Why Choose This Part
Integrating three channels into a single 4x4mm VQFN package significantly reduces component count and PCB footprint compared to using discrete monitors. It provides high precision with 0.25 percent accuracy and features low 350uA typical power consumption, making it suitable for power-sensitive applications. The programmable averaging and alert pins allow for flexible firmware-controlled response to transient current events.
Applications
Key Specifications
Getting Started
To evaluate this IC, use the INA3221EVM evaluation module which provides a complete hardware platform for testing the three-channel monitoring capabilities. Interface the device via I2C to a microcontroller such as an MSP430 or STM32, and ensure the shunt resistors are sized according to your maximum expected current and the 0V to 26V input range. Configuration involves setting the configuration register for conversion times and averaging modes to balance noise rejection with response speed.
