LTM2881HY-5#PBF

Overview

The LTM2881HY-5#PBF is a complete galvanically isolated full-duplex RS485/RS422 μModule transceiver manufactured by Analog Devices Inc. It integrates two independent channels within a single package, eliminating the need for external discrete components. The device features an integrated low-noise, high-efficiency DC/DC converter that provides isolated power to the secondary side from a single supply voltage. It supports data rates up to 1 Mb/s and operates with a supply voltage range of 4.5 V to 5.5 V. The component is housed in a 32-lead LGA package and is rated for operation between -40°C and +105°C.

Feature Summary

• Integrates dual isolated RS485/RS422 transceivers with on-board isolated power generation
• Provides galvanic isolation to break ground loops and withstand large common-mode voltage variations
• Eliminates design complexity by requiring no external passive or active components for basic operation

Applications

• Industrial automation systems requiring robust communication over noisy environments
• Process control networks where ground potential differences exist between nodes
• Medical equipment interfaces demanding high isolation safety standards
• Building automation and smart metering infrastructure

Procurement Notes

Verify the specific suffix and package variant against the official Analog Devices datasheet to ensure compatibility with your board layout. Confirm that the required isolation voltage ratings meet your system's safety certifications. Check for moisture sensitivity levels if storage conditions are not controlled. Ensure the development team has access to the correct reference designs for proper PCB thermal management and signal integrity.

Selection Notes

Select this component when designing systems that require dual-channel isolation without the footprint penalty of multiple discrete isolators and converters. It is suitable for applications needing full-duplex communication with high noise immunity. Consider the thermal performance of the LGA package during selection. Evaluate whether the integrated DC/DC converter output current meets the load requirements of the connected interface circuits.

Part Context

This part belongs to the LTM288x family of μModules, which are designed to simplify the implementation of isolated serial interfaces. These modules combine analog front-ends with digital isolation technology and power conversion in a compact form factor. The family targets designers who need to reduce bill-of-materials count and accelerate time-to-market for industrial and medical communication nodes.

Replacement Considerations

Direct replacements must offer similar isolation voltage ratings and dual-channel functionality. Verify pinout compatibility if substituting within the same manufacturer's portfolio. Cross-manufacturer swaps may require schematic and layout modifications due to differences in control logic or power sequencing.