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TPD4E110EVM Schematic

Clyde Shappee14
Prodigy 45 points
Other Parts Discussed in Thread: TPD4E110

The schematic for the TPD4E110DP Eval board is not legible.  I can't see the reference designators.  Could someone help get a better schematic?

  • 0
    TI__Expert 3500 points

    Clyde-

    Thanks for letting us know about the schematic error! I'm not sure what happened there, but I'll work to get the document updated as soon as possible. In the meantime, below is a schematic with correct reference designators for that EVM.

    Let me know if there's any other way I can help you, either with regards to this issue or any other issues!

    Thanks,

    Alec

  • 0 in reply to Alec Forbes
    Prodigy 45 points
    Alec,

    I bought the Eval board to experiment with EMI protection. In a design we have this part was selected to clamp the voltage of an RFID signal to protect the TI TRF7970 device. I wanted to see if the TVS device was clamping the signal so that in hampers wake up. I had planned on hooking up a signal generator to J13 and monitoring test point 17. Is this what you would recommend?

    Thanks for the updated schematic.

    Clyde
  • 0 in reply to Clyde Shappee14
    TI__Expert 3500 points

    Hey Clyde-

    Your test method should work well! With a generator on J13 and monitoring test point 17 you should see your normal signal, except clamped above the breakdown voltage of the TPD4E110 (~6.5V) and below 0V, as you would expect to see with any reverse bias diode. While I'm not familiar with the TRF7970 in particular, as long as the RFID signal does not go above the breakdown voltage or negative you shouldn't see any clamping of the signal except in ESD conditions. If the protected signal has a negative component, you will have to use a bidirectional TVS diode instead of a unidirectional diode.

    Thanks again for the question!

    Alec