SLLA585 April   2022 THVD2410 , THVD2450

 

  1.   Trademarks
  2. 1Introduction
  3. 2Features
    1. 2.1 High Voltage Fault Protection
    2. 2.2 Wide Input Common Mode Range
    3. 2.3 Slowing Fast Edges
    4. 2.4 Deglitch Function
  4. 3Summary

1 Introduction

The RS-485 interface works using differential signaling which is effective in rejecting common-mode noise making it a popular choice for long-distance communication. RS-485 transceivers currently come with many different features a designer can choose from. This application note will help designers understand how features like fault protection, input common mode ranges, and deglitch enables can help designers to create a more robust RS-485 system. In this application note, each feature is discussed and lab tested using THVD24x0 devices (supports the listed features) with results. THVD2410 and THVD2450 are ±70-V fault-protected, half-duplex, RS-422/RS-485 transceivers operating on a single 3-V to 5.5-V supply. By leveraging these useful features, the RS-485 system design become much easier and the system is more robust.