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What is the right form the conection for TPD2E007? Conection in GND or chassis ground?

MILTON SIERRA SOLANO
Prodigy 10 points
Other Parts Discussed in Thread: TPD2E007

I'm desgining comunication RS422 using the SN75179, but i want to know about the righ form of conection of  TPD2E007.  I have option A and option B (see figure). 

best regars,

  • 0
    TI__Mastermind 21646 points

    Hi Milton,

    From my experience (which is in automotive applications) typically everything in the node is referenced to chassis ground. This is because a major benifit that transceivers like RS422, RS485 and CAN is they operate accross high common mode voltages (±7, ±7, and ±12 respectively). If you can gaurentee that the application you are using the application in will not see larger ground potential differences (GPDs) at the transceiver, you will be fine.

    Let me know if you have any other questions.

    Thanks,

    John