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DS90UB913A-Q1: Designing the power over coax filter

Part Number: DS90UB913A-Q1

With reference to the application note SNLA224 ,"Sending Power Over Coax in DS90UB913A Designs",how the resistor value parallel to the inductor is being chosen.

As we move to higher speeds (higher clock rate) in our design,we could experience data loss and we suspect the Inductor- Resistor combination values.

Please help us in choosing the value of components.

Any design references /notes will be highly helpful.

  • Hi,
    Referring to application note SNLA224 figure 6, we currently recommended using 2k ohm 1% resistors for R6 and R8. 10uF cap for C4 and C6. 1K ohm @100MHz FB for L3.


    Sincerely,
    Charley Cai

  • In reply to Charley Cai:

    Hi,

    Thanks for the prompt response.

    Can you please let us know how these inductor and resistor values are being selected.

    Would be more helpful on debugging the data loss at higher frequency issue.

    Thanks,

    Uma

  • In reply to Uma Sundaram:

    Hi,
    The application note SNLA224 ,"Sending Power Over Coax in DS90UB913A Designs" details how some of the components are selected.
    Data loss at higher frequency maybe related to system level implementation. Further discussion is moved offline.

    Charley Cai

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