INA3221AIRGVT

Current Regulation/Management Overview

The INA3221AIRGVT is a triple-channel, high-side current and bus voltage monitor manufactured by Texas Instruments. It features an I2C-compatible interface with four programmable addresses. The device monitors shunt voltage drops and bus supply voltages ranging from 0V to +26V. Powered by a single 2.7V to 5.5V supply, it draws a typical operating current of 350µA. Key electrical 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 operates within a temperature range of -40°C to +125°C and is housed in a VQFN-16 package.

Current Regulation/Management Feature Summary

• Triple-channel architecture for simultaneous monitoring of three independent circuits
• High-side measurement capability allowing sensing on the positive power rail
• Integrated alert functionality for detecting programmable over-range conditions
• I2C and SMBus compatible digital interface with multiple address options

Current Regulation/Management Applications

• Server and computer system power management
• Portable electronic device battery monitoring
• Industrial power distribution units
• Battery-powered equipment current tracking

Current Regulation/Management Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for specific moisture sensitivity level requirements during storage and handling. Review the latest datasheet revision for any pinout or parameter updates before finalizing integration into hardware designs.

Current Regulation/Management Selection Notes

Select this component when multi-channel high-side current monitoring is required with digital output. Ensure the system bus voltage does not exceed the 26V limit. Verify that the I2C bus speed and addressing scheme align with the host controller capabilities. Consider the thermal performance of the VQFN-16 package relative to the expected ambient operating conditions.

Current Regulation/Management Part Context

This part belongs to the INA3221 family of current and power monitors. It serves as a specialized solution for applications requiring precise measurement of both shunt and bus voltages across multiple channels. The device integrates zero-drift amplifier technology to maintain accuracy over temperature variations without external calibration.

Current Regulation/Management Replacement Considerations

INA3221AIRGVR is a tape-and-reel variant of the same functional device. Verify package compatibility and ordering suffix differences before substitution.