SCDA057 March   2025 TMUX7612 , TMUX8212 , TMUX8612 , TMUX9612 , TMUXS7614D

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Parameter Considerations for Replacing a Photorelay With a High Voltage Analog Switch
  6. 3What to do if the Control Ground and Switch Grounds are Different
  7. 4Summary and Part Recommendations
  8. 5References

Abstract

When designing or updating an electronic system, replacing components for more efficient and smaller alternatives often leads to performance improvements and cost savings. An example of this is the shift away from larger and more expensive photorelays in favor of smaller and cheaper analog multiplexers in automated test and measurement and factory automation systems. Furthermore, historically photorelays were the only option for switching up to 100V, but TI’s new high voltage analog switches now provide options for up to 220V. While TI’s When to Replace a Relay With a Multiplexer application note provides great context into the differences between switching options and when to utilize an analog multiplexer, this application note includes the key specs to look into when deciding whether a particular analog switch is a proper design for replacing a particular photorelay.