ADBMS1818ASWZ-R7

Overview

The ADBMS1818ASWZ-R7 is an 18-cell battery monitor manufactured by Analog Devices Inc., designed for high-voltage battery stack monitoring. It operates within a supply voltage range of 0 V to 5 V and delivers an output voltage of 5.7 V. The device features a low operating power current of 1 uA and functions reliably across a temperature range of -40°C to +85°C. Packaged in a 64-lead LQFP format for surface mount installation, it integrates a daisy-chain interface for scalable system architecture.

Feature Summary

• Supports measurement of up to 18 series-connected cells with a maximum total measurement error below 3mV
• Integrates a bidirectional isoSPI interface enabling redundant communication paths over single or twisted-pair cables
• Includes passive cell balancing capability with programmable pulse width modulation up to 200mA maximum
• Features a 16-bit delta-sigma analog-to-digital converter with a programmable third-order noise filter

Applications

• High-voltage battery stack monitoring systems
• Electric vehicle traction battery management
• Energy storage system cell supervision
• Industrial battery pack protection circuits

Procurement Notes

Verify the specific suffix R7 confirms the reel packaging configuration required for automated assembly processes. Confirm that the ASWZ designation aligns with the specified industrial temperature range and lead-free RoHS compliance standards. Ensure compatibility with the EVAL-ADBMS1818 development environment if initial validation is planned before production integration.

Selection Notes

Select this component when designing systems requiring precise voltage monitoring for large series battery arrays. The integrated isoSPI interface simplifies wiring complexity compared to traditional isolated serial protocols. Consider the 64-pin LQFP package dimensions for PCB layout constraints and verify thermal dissipation requirements for the intended operating environment.

Part Context

This part belongs to the ADBMS1818 family of battery monitors from Analog Devices. It is specifically engineered for applications demanding high accuracy and robust communication reliability in electric and hybrid vehicle architectures. The device complements other power management solutions by providing detailed cell-level data through a standardized daisy-chain topology.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.