SCDA043 October   2022 MUX36D08 , TMUX6136 , TMUX6208 , TMUX6219 , TMUX6219-Q1 , TMUX6234 , TMUX6236 , TMUX7208 , TMUX7219 , TMUX7219-Q1 , TMUX7234 , TMUX7236 , TMUX7308F , TMUX7309F , TMUX7348F , TMUX7349F , TMUX8108 , TMUX8109 , TMUX8212


  1.   Abstract
  2.   Trademarks
  3. 1Differential, Single-Ended, and Common Mode Signals
  4. 2Characteristics of Interest for Selecting a Multiplexer for High Voltage Common Mode Applications
    1. 2.1 Operating Supply Range
    2. 2.2 Crosstalk and Bandwidth
    3. 2.3 Leakage Current
    4. 2.4 Fault Protection
  5. 3Multiplexers in High Voltage Common Mode Applications
    1. 3.1 PLC Multi-Channel Analog I/O Modules
    2. 3.2 CAN Bus Multiplexing Applications with High Voltage Common Mode
    3. 3.3 High Voltage Battery Cell Monitoring
  6. 4Recommended Multiplexers for High Voltage Common Mode Applications


High common mode voltages can often be a top concern when designing in a particularly noisy or harsh environment as they can cause irreparable damage to a signal chain or significantly impact a system's accuracy. However, sometimes high common mode voltages are present by design and the overall system needs to be able to accommodate these high voltages for everything to cohesively work together. Whether intentional or not, the components along the signal chain need to be able to withstand and operate effectively in these conditions and TI’s multiplexer portfolio offers many options to handle a myriad of situations where this can be a possibility while also offering the performance needed for any application. In this report, several high common mode voltage applications will be explored which will include analog I/O modules for programmable logic controllers, industrial protocols such as CAN or RS485, and battery cell monitoring.