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DS90UH949-Q1: TDR testing, difference impedance tolerance ?

PYTsai
Genius 12110 points

Part Number: DS90UH949-Q1

Hi 

We are doing TDR testing. May i know the acceptable tolerance for the test result ? 

  • 0
    TI__Mastermind 25955 points

    Hi PYTsai,

    The tolerances listed for the part are available in Electrical Characteristics table of the Datasheet.  The IBIS model for the device is available here:

    If more data is required than what is supplied in the datasheet and IBIS model, please let me know.

    Sincerely,
    Bryan Kahler

  • 0 in reply to Bryan Kahler
    TI__Genius 12110 points

    Hi Bryan,

    Customer would like to use USB type C connector for FPD LINK. They would like to know the TDR tolerance requirement at the connector side. 

    Is it correct the differential impedance of the connector in the range 80 ~ 100 ohm is OK ?

  • 0 in reply to PYTsai
    TI__Mastermind 25955 points

    Hi PYTsai,

    To minimize any common mode noise generation the TX PCB interconnect, the interconnecting media, the RX PCB interconnect, and the termination should all match (within 10%) in characteristic impedance (differential mode).  

    An Application Report on LVDS Design-In guidelines may be found here:

    http://www.ti.com/lit/an/snla008a/snla008a.pdf

    If more information is required for the channel spec, please send me an e-mail as it requires an NDA.

    Sincerely,
    Bryan Kahler