AD7280AWBSTZ

Overview

The AD7280AWBSTZ is a Lithium-Ion battery monitoring system designed for stacked battery applications, such as those in Hybrid Electric Vehicles. It features multiplexed analog input and temperature measurement channels supporting up to six cells. The device includes an internal 3-ppm reference driving a 12-bit ADC with a 1 µs conversion time per channel. It operates within a VDD range of 7.5V to 30V and supports temperatures from -40°C to +105°C. Key interfaces include a daisy-chain serial interface for up to 300 channels and cell balancing outputs.

Feature Summary

• Integrates multiplexed analog inputs and temperature measurement channels for comprehensive battery stack monitoring.
• Features an internal high-precision 3-ppm reference and a 12-bit ADC for accurate voltage conversion.
• Provides dedicated cell balancing interface outputs to control external FET transistors for cell equalization.

Applications

• Lithium-Ion Battery Monitoring
• Hybrid Electric Vehicle Battery Management Systems

Procurement Notes

Verify the specific suffix 'WBSTZ' against the manufacturer's official datasheet to confirm package type and tape/reel specifications. Ensure compatibility with the required operating voltage range and temperature ratings for your specific application environment before procurement.

Selection Notes

Select this component when monitoring up to six series-connected Lithium-Ion cells is required. It is suitable for applications needing high-speed conversion and precise voltage measurement via an integrated 12-bit ADC. Consider the daisy-chain capability if scaling to larger battery stacks requiring extensive channel coverage.

Part Context

This part belongs to the AD7280A family of battery management ICs from Analog Devices. It serves as a primary monitor for multi-cell stacks, offering integrated signal conditioning and digital interfaces. The device simplifies design by combining analog front-end functions with digital processing capabilities in a single package.

Replacement Considerations

The AD7280ABSTZ is a documented substitute within the same product family, sharing identical functional specifications and pinout compatibility.