• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 33 subscribers
  • Views 483 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DS280MB810: Minimum operating frequency for the DS280MB810?

Gregory Duperon
Expert 7670 points
Part Number: DS280MB810
Other Parts Discussed in Thread: DS280BR810

  • Is there a minimum operating frequency for the DS280MB810?
  • This part is intended for Ethernet signals.  Will it still function with regular 50% duty cycle clocks in the range of 250kHz to 3GHz on the data paths?
  • I would like to interface this device in an LVPECL environment.  Are the inputs and outputs compatible with this voltage level?  What are VIH, VIL, VOH, VOL?
  • Is there a chip-to-chip skew specification?

  • 0
    TI__Guru* 93570 points

    Hi Gregory,

    1). 250KHz to 3GHz is a very low frequency. Having said this, as long AC coupling cap is large enough to take care of the RC time constant for the run length of the data pattern this should be fine. If indeed the application requires just 250KHz to 3GHz only please let us know sine there could be a more applicable part.

    2). Main application for this part - as you noted is Ethernet base designs. However, if the application is mainly up to 3GHz clock it maybe overkill. Further, this part may add a residual random jitter so for clock distribution may  not be ideal.

    3). DS280BR810 is a linear redriver with certain amount of gain(~15dB at 14GHz) so at 3GHz there is not much gain. So the expectation is that  at 3GHz this part acts like a analog pass through or buffer.

    4). I don't believe this has been characterized.

    Regards,, Nasser

  • 0 in reply to Nasser Mohammadi
    TI__Expert 7670 points

    Nasser,

    What would be the more applicable solution for 250kHz-3GHz clock signals?

    Greg

  • 0 in reply to Gregory Duperon
    TI__Guru* 93570 points

    Hi Greg,

    Through internal email, please send us application block diagram and more details - if possible. Please let us know.

    Regards,, Nasser