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DS80PCI800: application problem

zhang ping
Genius 3835 points
Part Number: DS80PCI800

 

The picture shows that the model of our application is different from the typical application, please help to confirm whether DS80pci800 can meet the requirements of this application.

  • 0
    TI__Guru* 93670 points

    Hi Ping,

    DS80PCI800 should work in your block diagram. Suggestion is to use DS80PCI800 - this part has been qualified by PCIe SIG.

    Also, please provide 3-4dB minimum loss on input of the DS80PCI800. 

    Given your connector and transmission media, it is a good idea if you can do system integrity analyses using s-parameter of your connector and pcb material to make sure there is enough eye opening.

    Regards ,, nasser

  • 0
    Prodigy 10 points

    Nasser，

    The PCIE Card we designed, one end is Server, the orther end is FPGA with a long cable of 300mm/500mm length.

    In our block diagram, the DS80PCI800 device is placed on the middle of the TX lane. 

    The Insert Loss of the input is about -10dB total, within -15dB.

    The Insert Loss of the output is about -10dB total, within -15dB.

    Above, Can PCIE RePeater Work well，or use PCIE Retimer to replace.

       Thanks.

  • 0 in reply to Dongjun Zhang
    TI__Guru* 93670 points

    Greetings,

    A redriver like should be able to handle this. Please note in Gen3 PCIe root complex and end point - without a redriver - should be able to handle 22dB total channel loss. In your setup you have 30dB total channel loss so the redriver has to compensate for 10-11dB and the system will do the rest. DS80PCI800 should be able to handle this much loss.

    Regards ,, Nasser