App note: Using the LTM2881 as an Isolated 5V power supply

Here is an app note from Linear Technology on how to use their LTMM2881 isolated RS485 transceiver as a isolated 5v power supply.

The LTMĀ®2881 is an isolated RS485 transceiver that guards against large ground-to-ground differentials. An onboard DC/DC converter provides isolated 5V power to the output.

Join the Conversation


  1. That is pretty cool, providing 1W across 2.5kV voltage differences, and allowing 20Mbps(!) at the same time. But $12 for the convenience of a floating supply?

Leave a comment

Your email address will not be published. Required fields are marked *

Notify me of followup comments via e-mail. You can also subscribe without commenting.