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DS160PR410: Redriver saturation

Ciprian Voiculescu
Prodigy 40 points
Part Number: DS160PR410
Other Parts Discussed in Thread: DS160PT801

Hi TI Team,

Can you please guide to a document that contains more info about redriver saturation?

Thanks

Ciprian

  • 0
    TI__Genius 12270 points

    Hi Ciprian,

    We currently don't have any documentation about redriver saturation. This is the first time I have heard of this concept—is it a specific type of behavior or condition that would be related to the redriver in your application?

    Best,

    Evan Su

  • 0
    Prodigy 40 points

    Hi Evan,

    At this moment I am facing a challange with a channel that has to much reflections. And at a certain point, with a CTLE well above the atentuation level of the channel, the redriver is acting as being in "saturation", which I think is normal, havinng in mind the high level of boost comparing with the atentuation level.

    Also I found this paper How to Tune DS160PR410 for Best Signal Integrity which migh help in this case.

    As a safety net I want to use a redriver. Can you please tell me how can I get the IBIS files for DS160PT801?

    Thanks.

    Ciprian

  • 0 in reply to Ciprian Voiculescu
    TI__Genius 12270 points

    Hi Ciprian,

    Ciprian Voiculescu said:
    At this moment I am facing a challange with a channel that has to much reflections. And at a certain point, with a CTLE well above the atentuation level of the channel, the redriver is acting as being in "saturation", which I think is normal, havinng in mind the high level of boost comparing with the atentuation level.

    Redrivers in general are designed to compensate for linear insertion loss caused by traces, connectors, etc. using specially designed amplifiers. Reflections are usually a result of impedance changes, sharp angles in trace routing, vias, and similar effects that lead to unpredictable signal distortions that redrivers don't have the tools to compensate. Normally, sources of reflection are mitigated as much as possible during the PCB design.

    When the redriver is operated at high CTLE settings relative to the amount of loss in the system, the main effect I'm aware of is that the signal could be over-equalized and driven into a nonlinear range, meaning that the the shape is distorted and the receiver could have problems interpreting it. Maybe this is a similar concept to what you are thinking about.

    Ciprian Voiculescu said:
    Can you please tell me how can I get the IBIS files for DS160PT801?

    Most of our DS160PT801 documentation and resources such as the IBIS-AMI model are stored in the My Secure Resources system due to confidentiality reasons. I'll work on giving you access this week.

    Best,

    Evan Su

  • 0 in reply to Evan Su
    TI__Genius 12270 points

    Hi Cirprian,

    You should now have access to the "DS160PT801-DESIGN" My Secure Resources folder containing DS160PT801 information. The IBIS-AMI model and its user guide can be found in the "Simulation Models" section.

    Best,

    Evan Su

  • +1 in reply to Evan Su
    Prodigy 40 points

    Hi Evan,

    Thanks a lot for your help and support.

    Br,

    Ciprian