Renesas Electronics Europe

RS-485 Isolator Raises the Bar for Bus Node Designs

Published by Renesas Electronics Europe

This white paper focuses on isolated digital interfaces conforming to RS-485, which continues to be the industry’s workhorse standard for data transmission. The paper provides an overview of RS-485’s common-mode voltage range (CMVR) definition, and explains how isolating a transceiver’s signal and supply paths from the local controller circuit allow it to tolerate huge common-mode voltages. It also presents a new RS-485 isolator based on giant magnetoresistance (GMR) technology, and discusses its benefits over other isolation technologies. 

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