LTM2881MPY-5

Overview

The LTM2881MPY-5 is a complete galvanically isolated full-duplex RS485/RS422 μModule transceiver manufactured by Analog Devices Inc. It integrates a high-performance transceiver with an isolated DC/DC converter, requiring no external components for basic operation. The device supports data rates up to 20 Mb/s and operates within a supply voltage range of 4.5 V to 5.5 V. It features a 32-BBGA package and provides 2500 VRMS isolation for one minute. The module includes a low-noise, efficient 5 V output DC/DC converter powered by a single input supply.

Feature Summary

• Integrates a full-duplex RS485/RS422 transceiver with an isolated DC/DC converter in a single μModule package.
• Provides galvanic isolation rated at 2500 VRMS for one minute.
• Eliminates the need for external discrete components for isolation and power conversion.
• Supports high-speed data transmission up to 20 Mb/s.

Applications

• Industrial automation systems requiring robust serial communication.
• Process control networks utilizing RS485 or RS422 protocols.
• Building automation and security systems.
• Medical equipment needing galvanic isolation for safety compliance.

Procurement Notes

Verify the specific suffix (e.g., #PBF) against the required RoHS compliance status and lead time requirements. Confirm that the 32-BBGA package dimensions match the target PCB footprint. Ensure the design accounts for the thermal characteristics of the integrated DC/DC converter under maximum load conditions.

Selection Notes

Select this component when a compact, fully integrated solution for isolated RS485/RS422 communication is required. It is suitable for designs where minimizing board space and reducing BOM complexity are priorities. Consider the 20 Mb/s data rate capability and the 2500 VRMS isolation barrier as key differentiators from standard non-isolated transceivers.

Part Context

The LTM2881 series belongs to Analog Devices' portfolio of μModules, which combine multiple functions into a single package. This specific model focuses on industrial serial communication interfaces. It is often evaluated using demonstration boards such as the DC1746A-A or DC1746A-B, which are designed for EMI evaluation and functional testing of the isolated interface.

Replacement Considerations

Direct replacements may include other variants within the LTM2881 family, such as the LTM2881HV-5#PBF, depending on specific voltage or performance requirements. Verify pin compatibility and isolation ratings before substitution.