INA3221AIRGVR

Current Regulation/Management Overview

The INA3221AIRGVR is a triple-channel, high-side current and bus voltage monitor manufactured by Texas Instruments. It features an I2C/SMBus compatible interface with four programmable addresses. The device monitors shunt voltage drops and bus power supply voltages ranging from 0V to +26V. It operates on a single 2.7V to 5.5V supply with a typical current consumption of 350μA. Key specifications include a gain error of ±0.25%, an input offset voltage of ±80μV maximum, and a common-mode rejection ratio (CMRR) of 110dB minimum. It supports bidirectional current measurement and includes alert functions for over-range conditions.

Current Regulation/Management Feature Summary

• Provides simultaneous monitoring of shunt voltage drops and bus supply voltages across three independent channels.
• Features zero-drift architecture ensuring high accuracy with low gain error and minimal input offset drift.
• Includes programmable conversion times and averaging modes to filter noise and optimize measurement stability.
• Offers critical and warning alert outputs to detect multiple programmable over-range conditions per channel.

Current Regulation/Management Applications

• Server and computer backplane power distribution monitoring
• Battery management systems in portable devices
• Power management product current sensing
• Industrial equipment power rail supervision

Current Regulation/Management Procurement Notes

Verify the specific suffix 'AIRGVR' against the manufacturer's latest datasheet to confirm package type and temperature grade. Ensure compatibility with system I2C address configurations. Check RoHS compliance status as indicated in official documentation. Confirm availability through authorized distributors only.

Current Regulation/Management Selection Notes

Select this component when precise triple-channel monitoring is required for high-side currents. Consider the 26V common-mode range and I2C interface requirements. Evaluate if the built-in averaging and alert features meet system diagnostic needs without external microcontroller intervention.

Current Regulation/Management Part Context

This part belongs to the INA3221 family of digital current monitors. It is designed for applications requiring accurate power monitoring with minimal external components. The device integrates signal conditioning and analog-to-digital conversion capabilities directly onto the silicon die.

Current Regulation/Management Replacement Considerations

INA3221AIRGVT is a tape-and-reel variant of the same functional device. Verify pinout and electrical specifications match before substitution. Other family members may offer different channel counts or interfaces.