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

3 What to do if the Control Ground and Switch Grounds are Different

In the cases where Control source ground and mux ground are shifted, TI’s new TXG-family of ground-leveling translators can be used to shift ground levels to make the signal compatible with the mux logic levels. The TXG8041 and TXG8042 can level ground differences of up to +/-80V. This can enable the Vswitch of the mux and the V­control from the source to be at different ground references and still achieve the functionality required to replace a relay switch with different ground levels. This way an engineer can still get the benefits of a small design size with quicker switching times that the analog switch provides even with shifted ground levels.

TXG Ground-Leveling Translator for Device Interface Figure 3-1 TXG Ground-Leveling Translator for Device Interface