ADBMS1818ASWZ-RL

Overview

The ADBMS1818ASWZ-RL is an 18-cell battery monitor manufactured by Analog Devices Inc., designed for monitoring multiple series-connected cells. It features a total measurement error of less than 3mV and supports daisy-chained connections for high-voltage systems. The device operates within a supply voltage range of 0 V to 5 V and includes an integrated isoSPI interface for isolated serial communication up to 100 meters. It utilizes a 16-bit delta-sigma ADC with a programmable three-order noise filter, enabling synchronous voltage and current measurements. The part is housed in a 64-pin LQFP package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Supports measurement of up to 18 series-connected battery cells with low total measurement error
• Integrates isoSPI interface for robust, long-distance isolated serial communication
• Enables passive cell balancing via programmable pulse width modulation
• Provides configurable general-purpose digital I/O or analog input channels

Applications

• Stackable architecture for high-voltage battery systems
• Backup power supply systems
• Grid energy storage applications

Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or official channels due to limited availability status. Confirm package integrity and moisture sensitivity handling requirements prior to assembly. Cross-reference the specific ordering suffix with the manufacturer datasheet to ensure correct reel packaging and variant specifications. Request recent lot traceability documentation if required for quality assurance protocols.

Selection Notes

Select this component for applications requiring precise monitoring of large battery stacks where isolation and noise immunity are critical. The integrated isoSPI interface reduces external component count compared to standard SPI solutions. Ensure the system design accommodates the 64-pin LQFP footprint and thermal dissipation needs. Verify that the required number of cells does not exceed the 18-cell limit per device without utilizing additional daisy-chained units.

Part Context

This part belongs to the ADBMS1818 family of battery management ICs from Analog Devices. It is specifically engineered for multi-cell lithium-ion and other chemistries. The device complements evaluation tools like the EVAL-ADBMS1818Z development board. It serves as a core monitoring element in complex battery management architectures requiring high accuracy and reliable communication.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.