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DS15EA101: Usage record with FPGA

Kenji Ohno1
Genius 5095 points
Part Number: DS15EA101

Hi Team,

Has this device been used with Intel's "cyclone V GX"?

I would like to know that the Rx port can be used with 1.5V-PCML without any problems.

Have you evaluated it at TI Lab?

Best Regards,

Kenji

  • 0
    TI__Guru* 93670 points

    Hi Kenji-San,

    Input or RX side cannot be used with PCML referenced to 1.5V supply. This part's input common mode voltage is about 1.9V and is typically used in AC coupled environment. Please AC couple to isolate common mode voltage on this part when driven by PCML interface. Additionally this has not been validated in TI labs.

    Regards,, Nasser

  • 0 in reply to Nasser Mohammadi
    Genius 5095 points

    Hi Nasser-san,

    Thank you for your answer.

    1.5V-PCML is the Rx setting on the FPGA side.

    Is AC coupling necessary even in that case?

    Best Regards,

    Kenji

  • 0 in reply to Kenji Ohno1
    TI__Guru* 93670 points

    Hi Kenji-San,

    Yes AC coupling is preferred:

    1). With AC coupling we do not need to worry about power sequencing between DS15EA101 and the FPGA.

    2). With AC coupling we do not need to worry about a mis-match between common mode references. This mis-match results in  poor return loss and thus signal quality degradation.

    Regards,, Nasser