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Original question:

DS90UB953-Q1: FPD-Link III over optical fiber

DS90UB953-Q1: FPD-Link III pairs using optical fiber

Tuoyu Cao
Prodigy 20 points
Part Number: DS90UB953-Q1
Other Parts Discussed in Thread: DS90UB935-Q1, DS90UB936-Q1

Hello, I am wondering if it is possible to use a optical fiber, such as SFP between a FPD-Link III pair (such as DS90UB936-Q1 and DS90UB935-Q1)?  I understand I will need to provide a separate power source but how about the data, control stream and clock (or at lease data and control)? We are going to use the camera system in a very harsh EM environment so we are trying to avoid every electric connections . 

Thanks a lot!

Tuoyu

  • 0
    TI__Mastermind 30515 points

    Touyu,

    If you need transmit the control signal as well through the fiber, unfortunately, the SFP can't support the bi-direction transmission in single cable to cover high freq. and low freq. case.

    may I know what is the environment in your case? thanks.

    best regards,

    Steven

  • 0 in reply to Steven(Shenzhen) Shi
    Prodigy 20 points

    Hi Steven,

    Thanks a lot for your reply. So if I transmit the control signal through another link, for the data can I simply connect the CML ouput line (DOUT+/-) of the chip to a SFP module directly?

    We are building a camera system in MRI which would have a very strong RF interference. Appreciate a lot if you have other suggestions.

    Best

    Tuoyu

  • 0 in reply to Tuoyu Cao
    TI__Mastermind 30515 points

    Tuoyu,

    it should be ok. For the design,  you need match the 953/954 high speed I/f with your laser driver and limiting amplifier electrical spec. in the SFP module. also, you need match the data rate at ~2Gbps or 4Gbps.

    best regards,

    Steven