LTC6812ILWE-1#3ZZTRPBF

Overview

The LTC6812ILWE-1#3ZZTRPBF is a 15-channel multicell battery stack monitor featuring an isoSPI interface. It measures up to 15 series-connected cells with a total measurement error of less than 2.2mV and supports cell voltages from 0V to 5V. The device utilizes a daisy-chain architecture for monitoring long high-voltage battery stacks. It includes passive cell balancing, programmable noise filters, and multiple digital I/O pins. The component operates within an industrial temperature range and is housed in a 64-pin eLQFP package.

Feature Summary

• Supports measurement of up to 15 series-connected battery cells with high precision
• Features isoSPI interface for high-speed, EMI-resistant communication over long distances
• Includes passive cell balancing capability with programmable pulse width modulation
• Allows cascading of multiple devices for extended high-voltage battery stack monitoring

Applications

• Electric vehicle battery management systems
• Hybrid electric vehicle powertrain monitoring
• Grid energy storage system cell supervision
• Uninterruptible power supply (UPS) battery arrays

Procurement Notes

Verify the specific suffix #3ZZTRPBF against official Analog Devices documentation to confirm tape-and-reel packaging and lead-free status. Confirm that the industrial grade designation matches project environmental requirements. Check current lifecycle status as distribution channels may list obsolete or limited stock variants. Ensure compatibility with existing isoSPI host controllers before procurement.

Selection Notes

Select this component when monitoring applications require precise voltage measurement across 15 series cells. The isoSPI interface is suitable for environments with high electromagnetic interference. Consider the passive balancing current limits if active thermal management is not available. Verify that the 64-pin eLQFP package fits the target PCB footprint and assembly capabilities.

Part Context

This part belongs to the LTC681x family of battery stack monitors designed for high-voltage applications. It serves as a core component in Battery Management Systems (BMS), providing essential data for state-of-charge and state-of-health calculations. The device integrates analog front-end circuitry with digital control logic to simplify system design.

Replacement Considerations

• DC3036A
• LTC6812IGW-1

FAQ

What is the maximum number of cells this monitor can measure?

The LTC6812ILWE-1#3ZZTRPBF can measure up to 15 series-connected battery cells.

Does the device support communication redundancy?

Yes, the isoSPI interface supports reversible operation, allowing for redundant communication paths to ensure data integrity.

Can multiple units be connected together?

Multiple LTC6812 devices can be daisy-chained to monitor longer high-voltage battery stacks simultaneously.