INA219BIDR

Current Regulation/Management Overview

The INA219BIDR is a zero-drift, bidirectional current and power monitor manufactured by Texas Instruments. It features an I2C interface for digital communication. The device supports high-side or low-side measurements with a common-mode voltage range of 0 V to 26 V. It operates on a single supply voltage between 3 V and 5.5 V. Key electrical specifications include a maximum input bias current of 1 mA, an input offset voltage of 50 µV, and a gain accuracy of ±0.5%. The component functions within a temperature range of -40°C to +125°C and is housed in an SOT-23-8 package.

Current Regulation/Management Feature Summary

• Zero-drift architecture ensures high precision without external calibration
• Bidirectional measurement capability for both current and power monitoring
• Integrated I2C serial interface for simplified system connectivity

Current Regulation/Management Applications

• Portable battery management systems
• Over-current protection and limit control circuits
• Power delivery monitoring in consumer electronics

Current Regulation/Management Procurement Notes

Verify the specific suffix 'IDR' corresponds to the SOT-23-8 package and tape-and-reel orientation required for your assembly process. Confirm that the I2C address configuration meets your system's bus requirements. Ensure compatibility with the 0 V to 26 V common-mode voltage range for your specific rail sensing application. Check for any recent product change notices regarding pinout or electrical characteristics.

Current Regulation/Management Selection Notes

Select this component when high accuracy is required without the need for periodic calibration. It is suitable for applications where space is limited due to its small SOT-23-8 footprint. Consider the I2C interface constraints and ensure the host microcontroller supports the necessary communication protocol. Evaluate the 1 mA supply current against total system power budgets.

Current Regulation/Management Part Context

This part belongs to the INA219 family of zero-drift current monitors from Texas Instruments. It provides a digital solution for replacing traditional analog current sensing methods. The series is designed for applications requiring precise measurement of low-value shunt resistors. It integrates amplification, ADC, and digital processing into a single compact IC.

Current Regulation/Management Replacement Considerations

INA219BIDCNR: Same functional specifications but in a DFN package instead of SOT-23-8.