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DS125DF410: Can I apply in the 8GHz input signal?

Yuxi Liu(Tony)
Intellectual 2530 points
Part Number: DS125DF410
Other Parts Discussed in Thread: DS100BR111, DS125BR401

Tool/software:

Hi Tier

My medical customer want to check that can they apply DS125DF410 in 8GHz input signal? 

Since the customer is not a communications customer and wants to process 4k video streams.

their input signal frequency should be around 8Ghz.

So the customer wants to confirm if the DS125DF410 can be used in an 8Ghz input?

If we can, what special designs we need to make, if not, please recommend some 1Ghz-8Ghz retimer.

Thanks you very much.

  • 0
    TI__Mastermind 23445 points

    Hi Tony,

    DS125DF410 cannot support 8Gbps data rate. This retimer only supports 9.8 to 12.5 Gbps + divide by 2, 4, and 8 subrates. I can recommend a different device if you can share a bit more information about the customer's application.

    • What interface is being used to transmit 4k video?
    • Can you confirm, is the data rate 8Gbps?
    • How many channels/lanes need to be supported?
    • Is data transmission bidirectional or unidirectional?
    • What is the estimated insertion loss which needs to be compensated?

    Best,

    Lucas

  • 0 in reply to Lucas Wolter
    TI__Intellectual 2530 points
    • What interface is being used to transmit 4k video?

      •        the interface is serdes,we need  support 4K or 2K .etc video application ,the interface datarate  @ 1~8GBPS datarate.

    • Can you confirm, is the data rate 8Gbps?
      • 1~8GBPS datarate
    • How many channels/lanes need to be supported?
      • one channel or four channels
    • Is data transmission bidirectional or unidirectional?
      • bidirectional
    • What is the estimated insertion loss which needs to be compensated?
      • max inertion loss 25dB@Nyquist freq
  • 0 in reply to Yuxi Liu(Tony)
    TI__Mastermind 23445 points

    Hi Tony,

    Thank you for sharing additional information.

    What specific video interface is being used? Is it HDMI, DisplayPort, SDI, or something else?

    The reason I'm asking is because we have different device portfolios which are intended for specific interfaces. I need to know which interface is being used to know which devices are the best fit.

    Best,

    Lucas

  • 0 in reply to Lucas Wolter
    Prodigy 20 points

    Hi Lucas,

    Now the data is NRZ SERDES signal,not DP or SDI,so we need a retimer can support1~8g bps. 

  • 0 in reply to jie yang
    TI__Mastermind 23445 points

    Hi Jie,

    Unfortunately we do not have any retimers available which can support general SerDes at 8 Gbps data rate.

    We do have many redrivers available which can support 8 Gbps NRZ SerDes. A redriver includes a CTLE and output driver, but does not include and clock and data recovery block (CDR) like a retimer does. A redriver is effective for compensating insertion loss and jitter due to ISI.

    I believe you are looking for a bidirectional device which supports one lane or 4 lanes, and can equalize up to 25dB @ 4GHz. Some good candidates are DS100BR111 and DS125BR401.

    Best,

    Lucas