LTM2881CV-3#PBF

Overview

The LTM2881CV-3#PBF is a complete galvanically isolated full-duplex RS485/RS422 μModule transceiver manufactured by Analog Devices Inc. It operates within a supply voltage range of 3 V to 3.6 V and supports data rates up to 20 Mb/s. The device integrates an isolated DC/DC converter providing a 5 V output, eliminating the need for external components. It features a 2500 Vrms isolation voltage and a common mode transient immunity of 30 kV/µs. Packaged in a 32-pin LGA format, it functions as a single driver and receiver unit suitable for harsh electrical environments.

Feature Summary

• Integrates a complete isolated transceiver with an internal low-noise DC/DC converter, requiring no external components for operation.
• Provides high common mode transient immunity to ensure reliable communication in electrically noisy industrial settings.
• Supports both half-duplex and full-duplex communication modes over RS-422 and RS-485 interfaces.

Applications

• Industrial automation systems requiring robust serial communication
• Factory floor networks subject to high electromagnetic interference
• Medical equipment needing galvanic isolation for safety compliance

Procurement Notes

Verify component authenticity through authorized distributors due to limited availability status. Confirm that the specific suffix matches the required isolation and speed specifications. Ensure compatibility with the intended PCB footprint and thermal management requirements before finalizing orders.

Selection Notes

Select this module when design constraints prohibit the use of discrete isolators or external power supplies. It is appropriate for applications demanding high reliability and minimal bill-of-materials complexity. Consider the 32-pin LGA package size during layout planning to ensure adequate clearance and soldering capabilities.

Part Context

This component belongs to the LTM2881 series of μModules from Analog Devices. These modules are designed to simplify the implementation of isolated serial interfaces by combining the transceiver and isolation barrier into a single compact package. The series targets applications where space savings and reduced design time are critical priorities.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Evaluate alternative models within the same manufacturer's portfolio only if they explicitly match the pinout and functional specifications.

FAQ

Does the LTM2881CV-3#PBF require external components for isolation?

No, the device is a complete μModule that integrates the transceiver and an isolated DC/DC converter, requiring no external components for isolation functionality.

What is the maximum data rate supported by this module?

The module supports data rates up to 20 Mb/s for both RS-422 and RS-485 communications.