INA219BID

Current Regulation/Management Overview

The INA219BID is a bidirectional current and power monitor with an I2C interface, manufactured by Texas Instruments. It operates within a supply voltage range of 3 V to 5.5 V and supports bus voltage sensing from 0 V to 26 V. The device features a maximum quiescent current of 1 mA and provides an output current capability of 10 mA. It offers a typical accuracy of ±0.5% and includes a programmable calibration register for direct current reading. The component is housed in an 8-pin SOT-23 package and functions across a temperature range of -40°C to +125°C.

Current Regulation/Management Feature Summary

• Bidirectional current monitoring with high-side sensing capability
• Integrated I2C and SMBus compatible digital interface
• Zero-drift architecture ensuring high precision

Current Regulation/Management Applications

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

Current Regulation/Management Procurement Notes

Verify the specific suffix 'D' indicates the SOIC-8 package variant rather than the DCNR SOT-23-8 tape-and-reel option. Confirm RoHS compliance status and ensure the selected packaging matches assembly requirements. Cross-reference the exact part number against official TI documentation to distinguish between A-grade and B-grade specifications.

Current Regulation/Management Selection Notes

Select this component when precise bidirectional current measurement is required in space-constrained designs. The zero-drift technology minimizes offset errors, making it suitable for low-voltage drop applications. Ensure the system logic levels are compatible with the I2C interface and that the 26V common-mode range meets the bus voltage requirements.

Current Regulation/Management Part Context

This device belongs to the INA219 family of current shunt monitors. It integrates a precision amplifier, PGA, and digital logic to provide a digital output proportional to the shunt voltage drop. The B-grade variant offers tighter accuracy specifications compared to the standard A-grade version, catering to applications requiring higher measurement fidelity.

Current Regulation/Management Replacement Considerations

INA219AID: Offers similar functionality but with lower accuracy (±1%). INA219BIDCNR: Identical electrical performance but packaged in SOT-23-8 tape-and-reel format instead of tube.