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RS-485 Isolator Raises the Bar for Bus Node Designs

Authored on: Feb 24, 2017

Technical Paper

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Today's legislation requires equipment operating in harsh environments to implement isolation for their data transmission systems. As a result, single-channel isolated systems are moving to applications utilizing multi-channel isolation with new isolation components. This white paper focuses on isolated digital interfaces conforming to RS-485, and:

  • Provides an overview of RS-485's CMVR definition
  • Explains how isolating a transceiver's signal and supply paths from the local controller circuit allow it to tolerate huge common-mode voltages
  • Presents a new RS-485 isolator based on GMR technology, and discuss its benefits over other isolation technologies

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