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DS280BR820: Related to S-parameter file & Floor plane for upgraded version which can support 32 Gbps speed

shivakant dwivedi
Intellectual 960 points
Part Number: DS280BR820

Hi Team,

I got S-parameter file for TI repeater ds280br820 from TI.

I want to know that @ what Equalization values this S-parameters are extracted..

I performed simulation using s-parameters of TI repeater & other passive components of my circuit.I got results as follow:

 You see here that losses are increasing as frequency increasing.I want to equalize high frequency losses.

If you have 6 dB Equalization S-parameter file, please share to me.

Also we are close to use this repeater in one of my project so i also want to know floor plane for upgraded version of this to support higher rate like 32 Gbps or more.

  • 0
    TI__Mastermind 19135 points

    Hi,

    I believe that you downloaded the DS280BR820 IBIS-AMI model zip file from TI.com product page. Is that correct?

    The attached model files package does not contain CTLE s-parameters. Instead the files include IBIS-AMI model for the repeater, where the CTLE values for the two boost stages are adjustable AMI parameters. Refer to the attached model user's guide.

    Cordially,

    Rodrigo Natal

    HSSC Applications EngineerTI_DS280MBxxx_IBIS_AMI_User_Guide.pdf

  • 0 in reply to Rodrigo Natal
    Intellectual 960 points

    Hi Natal,

    Thanks for your reply.

    Yes,I have Downloaded DS280BR820 IBIS-AMI model zip file from TI.com product page.Along with that i also downloaded  DS280BR820EVM_RevE_sparams folder.For simply insertion loss & return loss characterization, i was using  S4P file of Tx & Rx from DS280BR820EVM_RevE_sparams folder.Is this file contain some Specific Equalization value?

    Yes, while doing IBIS AMI model of DS280BR820, i will follow the steps to set values as recommended in Model User's guide pdf provided by you.

    Actually i am performing 2 simulation:

    • S-parameter for  insertion loss & return loss 
    • Channel simulation for Eye generation & analysis

  • 0 in reply to shivakant dwivedi
    TI__Mastermind 19135 points

    Hi,

    The Tx & Rx .s4p files from the DS280BR820EVM_RevE_sparams folder are for the DS280BR820 repeater evaluation board channels (i.e. PCB trace + MXP connector.) The repeater CTLE boost s-parameters are not included there.

    Cordially,

    Rodrigo Natal

    HSSC Applications Engineer