INA228AIDGST

Power Supply Controllers, Monitors Overview

The INA228AIDGST is a precision, bidirectional current and power monitor manufactured by Texas Instruments. It features an integrated shunt resistor and high-precision amplifiers for accurate measurement of voltage across the shunt and system bus voltage. The device provides digital output via an I2C interface, enabling direct connection to microcontrollers or DSPs without requiring external analog-to-digital conversion. Key electrical parameters include a maximum shunt voltage of ±81mV, a bus voltage range of 0V to 80V, and a typical DC accuracy of 0.5% over temperature. The device operates from a single supply voltage ranging from 2.7V to 5.5V.

Power Supply Controllers, Monitors Feature Summary

• Integrated high-precision shunt resistor eliminates external component tolerance errors.
• Bidirectional measurement capability supports both sourcing and sinking current scenarios.
• Digital I2C interface simplifies integration with host processors.
• On-chip calibration ensures high accuracy across wide temperature ranges.

Power Supply Controllers, Monitors Applications

• Battery management systems in portable electronics
• Overcurrent protection in industrial automation controllers
• Power monitoring in server and data center infrastructure
• Current sensing in motor control applications

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'DGST' corresponds to the correct package type (VSSOP-10) and tape-and-reel quantity when placing orders. Confirm that the operating temperature range specified in the datasheet aligns with your application environment requirements. Ensure compatibility with the host system's I2C voltage levels and pull-up resistor configurations before finalizing procurement.

Power Supply Controllers, Monitors Selection Notes

Select this component when high accuracy is required without the complexity of external shunt calibration. It is suitable for applications where board space is limited due to the integrated shunt design. Consider the I2C interface speed and addressability if multiple devices are used on the same bus. Evaluate the need for bidirectional sensing versus unidirectional alternatives based on circuit topology.

Power Supply Controllers, Monitors Part Context

The INA228 belongs to Texas Instruments' family of current and power monitors. Unlike discrete solutions, it integrates the sense resistor, reducing footprint and improving accuracy. It competes with other integrated current sensors offering digital outputs. The device is designed for applications demanding precise energy metering and fault detection in compact form factors.

Power Supply Controllers, Monitors Replacement Considerations

Direct replacements may include the INA226 or INA227 series, depending on required accuracy and interface specifications. Verify pin compatibility and software register mapping when substituting within the same product family. Ensure that any alternative part meets the same voltage and current rating requirements for the specific application.