LTC6811IG-2#PBF

Overview

The LTC6811IG-2#PBF is a multicell battery stack monitor manufactured by Analog Devices Inc. It measures up to twelve series-connected cells with high precision and supports passive cell balancing via external switches. The device features an addressable isoSPI interface for daisy-chain communication, allowing multiple units to monitor large battery stacks using minimal wiring. Operating within a supply voltage range of 11 V to 55 V, it functions in temperatures from -40°C to +85°C. Packaged in a 48-pin SSOP, the component draws 550 uA during operation.

Feature Summary

• Monitors up to twelve series-connected battery cells with high measurement accuracy
• Supports passive cell balancing through external switch control
• Features addressable isoSPI interface for scalable daisy-chain connectivity

Applications

• Electric vehicle battery management systems
• Hybrid electric vehicle powertrain monitoring
• Large-scale energy storage system cell supervision
• Industrial battery pack diagnostics

Procurement Notes

Verify current availability status as distribution channels may indicate limited stock or restricted sales regions. Confirm package integrity upon receipt. Ensure compatibility with existing development kits such as DC2260A for validation. Check RoHS compliance documentation against specific regional regulatory requirements before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring precise monitoring of twelve-cell stacks with isolated communication capabilities. The addressable isoSPI interface distinguishes it from standard SPI variants, enabling unique identification of each chip in a chain. Consider thermal performance and external balancing circuit requirements when evaluating system integration constraints.

Part Context

This part belongs to the LTC6811 family of battery monitors designed for automotive and industrial applications. It complements other variants like the LTC6811-1 by providing addressable communication features. The component integrates voltage measurement, temperature sensing inputs, and diagnostic functions into a single solution for robust battery management architectures.

Replacement Considerations

Direct substitutes include other LTC6811 family members such as the LTC6811-1. Verify pinout compatibility and software register mapping differences between variants before substitution. Ensure that any replacement maintains the required isoSPI addressing functionality for the specific application design.