SCDA036A May   2022  – June 2024 TMUX8212

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Size Requirement
    1. 1.1 Optimized Layout and Control
  5. 2 Reliability Over Time
  6. 3 Power Consumption
  7. 4 Switching Speed and Hot Switching
  8. 5 Signal Isolation
  9. 6 Capacitance
  10. 7 On-Resistance and Flatness
  11. 8 Leakage Current
  12. 9 Integrated Protection
  13. 10Latch-up Immunity
  14. 11Galvanic Isolation
  15. 12Conclusion
  16. 13References
  17. 14Revision History

7 On-Resistance and Flatness

One disadvantage many multiplexer devices have is On-Resistance. Because of the architecture of many multiplexer devices, the On-Resistance can vary significantly across bias voltage. This can result in large distortions on the output. However, TI’s Flat On-Resistance family of multiplexers address this issue. These devices keep the On-Resistance flat across a wide bias range. As a result, the performance is more comparable to a Photorelay or mechanical relay. This Flat On-Resistance has significant benefits to system performance, reducing THD and ensuring signal integrity. These Flat On-Resistance multiplexers have extremely low distortion and bridge the performance gap to photorelays. An example of one of these TI multiplexers is the TMUX821x.

On-Resistance of a Mechanical Relay, Photorelay, conventional Multiplexer, and TI’s Flat Ron Multiplexer Figure 7-1 On-Resistance of a Mechanical Relay, Photorelay, conventional Multiplexer, and TI’s Flat Ron Multiplexer