INA219AIDCNR

Current Regulation/Management Overview

The INA219AIDCNR is a bidirectional current and power monitor with an I2C interface, manufactured by Texas Instruments. It monitors shunt voltage drop and bus supply voltage, supporting a common-mode range of 0V to 26V. The device operates on a single +3V to +5.5V power supply and consumes a maximum supply current of 1mA. It features programmable conversion times and filtering options. Accuracy is specified at ±1%. The component is housed in an SOT-23 package with 8 pins.

Current Regulation/Management Feature Summary

• Integrates an I2C interface for digital communication with host controllers
• Provides direct readout of current, voltage, and power via internal calibration registers
• Supports high-side sensing with a wide common-mode voltage range up to 26V

Current Regulation/Management Applications

• Power management systems
• Computer and computer peripheral equipment
• Communication and network infrastructure
• Test and measurement instruments

Current Regulation/Management Procurement Notes

Verify the specific suffix 'CNR' corresponds to the SOT-23-8 tape and reel packaging configuration as defined in the official datasheet. Confirm that the 'A' grade designation aligns with the required ±1% accuracy specifications for the application. Ensure compatibility with the target I2C bus voltage levels and address settings before integration.

Current Regulation/Management Selection Notes

Select this component when high-side DC current monitoring is required within a 26V system. The integrated power calculation capability eliminates the need for external multiplication logic. Consider the SOT-23-8 footprint constraints and the necessity for I2C interface support. Verify that the ±1% accuracy meets the system requirements compared to higher precision alternatives.

Current Regulation/Management Part Context

This part belongs to the INA219 family of zero-drift current monitors. It complements other variants such as the INA219BIDCNR, which offers higher accuracy grades. The series is designed for compact power monitoring solutions in portable and industrial electronics, providing a complete solution for shunt-based current sensing with digital output.

Current Regulation/Management Replacement Considerations

The INA219BIDCNR serves as a verified alternative within the same family, offering improved accuracy specifications. Both components share identical pinouts and functional interfaces, facilitating direct substitution where higher precision is required without altering the board layout or software architecture.