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TCAN1051-Q1: Input Resistance Differences

Katie Lee1
Expert 3675 points
Part Number: TCAN1051-Q1
Other Parts Discussed in Thread: TCAN1051

Hi Team,

My customer is considering switching from a competitor device to TCAN1051/7 and wants to know if differences in input resistance cause trouble for CAN bus communication. Here’s the table they’ve put together.

Thanks,

Katie

  • 0
    TI__Guru 50795 points

    Hi Katie, 

    Input resistance is an indirect description of the leakage the pin will have under various conditions. For a CAN network, input resistance signifies how much of a common-mode load each transceiver will present to the bus. The smaller this resistance, the greater the load, and the more significant its impact will be on the common-mode. Ideally every transceiver will have a very high input resistance so that a large number of transceivers can be connected without presenting a significant load. For this comparison, we can see that TCAN1051/57 have will present a smaller load to the bus and thus allow for more nodes to be used without significantly impacting the common-mode. This means that this comparison shows our advantage over the existing device and how we will have less negative impact on the bus than the existing transceivers. 

    Let me know if you have any more questions.

    Regards,
    Eric Schott