INA219AID

Current Regulation/Management Overview

The INA219AID is a current shunt and power monitor manufactured by Texas Instruments, designed for high-side measurements in systems with bus voltages up to 26V. It integrates a precision amplifier, an internal 12-bit ADC, and digital logic to measure voltage across a shunt resistor and the bus voltage simultaneously. The device communicates via an I²C interface, allowing direct reading of shunt voltage, bus voltage, and calculated power values from dedicated registers. Operating within a temperature range of -40°C to +125°C, it features a maximum accuracy of ±1% and supports supply voltages between 3V and 5.5V.

Current Regulation/Management Feature Summary

• Integrates a precision amplifier, 12-bit ADC, and digital calculation logic for simultaneous shunt and bus voltage monitoring
• Supports bidirectional current measurement through configurable register settings
• Provides direct power monitoring capability via internal multiplication of current and bus voltage data

Current Regulation/Management Applications

• Over-current management and protection in portable equipment
• Current monitoring in battery packs and battery management systems
• Power monitoring in industrial process controls and load switches

Current Regulation/Management Procurement Notes

Verify that the specific part number suffix matches the required package type and temperature rating. Confirm RoHS compliance status and lead times with authorized distributors. Ensure the ordering information aligns with the intended application environment and regulatory requirements before finalizing procurement.

Current Regulation/Management Selection Notes

Select this component when a compact solution for high-side current sensing is required without external amplification circuitry. It is suitable for applications needing precise power monitoring where I²C connectivity is available. Consider the 26V common-mode voltage limit and the specific gain settings required for the target current range during system design.

Current Regulation/Management Part Context

This device belongs to the INA219 family of current shunt monitors, which are widely used in embedded systems for power management. It serves as a complete signal chain solution, eliminating the need for separate operational amplifiers and analog-to-digital converters typically required in discrete current sensing designs.

Current Regulation/Management Replacement Considerations

Check for updated revisions or alternative packages within the same TI product line. Verify pin compatibility and register mapping if substituting with other devices in the INA219 series or similar current monitors.