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10Gbase-T ESD protection

Michael Nycz
Intellectual 835 points
Other Parts Discussed in Thread: TPD4E001

I am designing a PCB that has at 10Gbase-T data path that is coming in through a high speed connector. The customer has loosely specified that they want "ESD protection" on these IO. I see that TI has a number of options for ESD protection. I am looking for a recommendation for an ESD solution for the 10Gbase-T application. Many of the devices say "Ethernet", but I want to make sure that the device that is chosen does not severely impact my 10Gbase-T signal. Can someone suggest what TI product would be good in this application?

Thank you,

Michael Nycz

  • 0
    TI__Mastermind 31600 points
    Michael,

    I have moved our post to the ESD/EMI forum so that it gets visibility from our experts in ESD protection.

    Patrick
  • 0 in reply to Patrick OFarrell
    TI__Genius 12190 points

    Hi Michael,

    First thing, I need to understand a few things about 10Gbase-T:

    • How many data lanes are there:
      • I data lane = 10 Gbps, 2 data lanes = 5 Gbps, etc
    • is there any POE happening?
    • Are there any magnetics between the connector and the PHY?

    I did try and determine this on my own, but found nothing explaining these. Please let me know and I will get back to you ASAP.

    Regards,

  • 0 in reply to Guy Yater
    Intellectual 835 points
    In answer to your questions:
    4 data lanes per channel.
    There is no POE
    There are no magnetics
    This is an adapter PCB that switches between two different types of connectors.
  • 0 in reply to Michael Nycz
    TI__Genius 12190 points
    Michael,

    Thanks for the info. I recommend TPD4E001 due to it's low clamping voltages and greater than 2 GHz bandwidth (the data rate is 1.25 GHz). Something to consider is what protection levels you are trying to achieve. This device is rated for level 4 (the highest) ESD protection per IEC 61000-4-2, meaning +/- 8-kV Contact and +/- 15-kV Air Gap. This probably meets or exceeds your requirement, since it meets the highest level of that spec. It is also rated for 5.5-A Peak Current per IEC 61000-4-5 8/20 us surge. So the question is, how much current (or open circuit voltage) are you trying to protect against?

    Regards,