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DS250DF410: DS250DF410 Receiver Input Common Mode Voltage Range

Dallas Pace
Prodigy 140 points

Part Number: DS250DF410

Tool/software:

In the Data Sheet, I see that "Each" Differential Rx Input has a 100Ohm Termination:

In the Pin Function Description is states the following:

The Receiver Input Specifications are also shown:

Question-1: What is the Receiver Input Common Mode Range {I see "Maximum" Vid = 1225mVppd}?

Question-2: If I'm injecting a Clock at 1.611328125GHz in one of the Rx Ports in order to Generate PRBS at its corresponding Tx Ports, is AC Signal Detection Relevant {Does 1.6GHz Clock Amplitude need a "Specific" Level}?

Note: I see 192mVppd "Minimum" Vsdat required to "Assert" Signal Detection at Rx Ports and 147mVppd "Maximum" Vsddt required to "De-Assert" Signal Detection at Rx Ports

  • 0
    TI__Mastermind 41623 points

    Hi Dallas,

    1. I'm not sure what receiver input common mode voltage is.  However, if you're AC coupling the signal, the common mode voltage is set by DS250DF410 receiver.  I don't think there is any concern on this.

    2. Yes, AC signal detection is relevant.  The signal detect status is required to enable functional blocks within the channel.  Signal detect could manually be forced on through registers, but this should be unnecessary given the signal amplitude you're considering.

    Thanks,

    Drew