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DS90LV004: Driving 10m cable - configuration and device suggestion

Mitchell
Expert 4915 points
Part Number: DS90LV004

Hi Team,

I'm looking for a device that can drive a high number of LVDS lanes (up to 14 lanes), each with a signaling rate of 800Mbps. The goal is to transmit this data from one board to another through a 10m cable. So, this leads me to 2 different questions:

Question 1.
What would be the best part to suggest as well as typical configuration? The DS90LV004 looks to be a good fit, but I would like confirmation on if this can drive to 10m? Would I need one DS90 on the TX board and another DS90 on the RX board?

Question 2.
Do you have any recommendations for standard off-the-shelf cables that can support these requirements? Ideally, I'm looking for a cable that has a high density of lanes.

Thanks,
Mitchell

  • 0
    TI__Genius 10250 points
    Hello Mitchell,

    DS90LV004 is probably the best fit, as you discovered. I don't have specific test data for this rate/distance, unfortunately, but I believe that, in principle, it should be able to do 800 Mbps at 10m with a good cable, perhaps CAT5e (24 AWG, not smaller), and with setting the pre-emphasis of DS90LV004 to max. Please notice that using high density cable might cause issues due to cross talk between the different lanes, but it is really hard to tell what the effect would be without trying it out.

    Regards,
    Yaser