• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 33 subscribers
  • Views 280 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.

DS160PR410: DS160PR410RNQT

David Siksik
Prodigy 215 points
Part Number: DS160PR410

Hello,

We would like to use the DS160PR410RNQT as PCIe gen3 redriver.

Is it recommended to place the redrivers (TX and RX)  in the motherboard or in the end-point cards that are connected to the motherboard?

We are mainly concern about signal integrity issues.

Thank you,

David

 

  • 0
    TI__Guru* 93670 points

    Hi David,

    First of all, it is highly recommended to use PR410 IBIS-AMI mode along with your system s-parameter model to make sure you have good signal integrity margin. PR410 model has been correlated with the actual device performance so this would give you a good overview of the eye openings and etc.

    As it relates to your question, this all depends on the insertion loss through the signal path. It is recommended to have at least 3-4dB loss on the input of the PR410 device. This is done to make sure PR410 operates in it'\s linear region and can pass Gen3 training sequence seamlessly. Please note table 1 of the data sheet. Note PR410 gain at 4GHz is ~ 12dB. Also, in Gen3 root complex and end point should be able to handle about 22dB on their own. Therefor this means total insertion loss should be about 34dB or less.

    Regards,, nasser