TUSB1002A: S-parameter

Hi Noriyuki-san,

Please see  the IBIS-AMI model on ti.com that has this information included. 

Hi Malik-san,

Thanks for your reply.

I'd like to run a simulation and estimate the channel loss by s-parameter, including the re-driver.
So, could you provide the s-parameter of TUSB1002A shown in the figure?

Regards,
Nobuyuki Kasai

Hi Noriyuki-san,

IBIS-AMI model contains this same information s-parameter information embedded into the model to run channel simulations. The model on ti.com also includes a guide on how to use it with Keysight ADS simulator. If you are looking for the SxP files I am unable to share at this time.  

Hi Noriyuki-san,

Understood, I will look into making this available. I will follow-up by the end of the week. 

Hi Nobuyuki-san,

I will let you know when it is uploaded to ti.com. 

Hi Nobuyuki-san,

Good question! The insertion loss for Length X (L_X) should not exceed the total amount of EQ provided by TUSB1002A RX1 @ 5GHz and it should not exceed the total compensation provided by the USB Host RX EQ. The insertion loss for Length Y (L_Y) should not exceed the total amount of EQ provided by TUSB1002A RX2 @ 5GHz and should not add loss to the downstream path such that it exceeds the standard USB 3.1 Loss budget (8.5 dB for Host to Type-A connector, net insertion loss). 

Ex 1 and Ex 2 are not the same. In both examples TUSB1002A RX EQ will compensate for the loss at it's receivers @ 5GHz. So in Ex1, net insertion loss would be 5 dB and 3 dB for the TX and RX paths, respectively.  For Ex2 net insertion loss would be 3 dB and 5 dB for the TX and RX paths, respectively. In Ex 2, the USB TX eye diagram would be better.

In general it is best to place TUSB1002A closer to the USB connector (maximize L_X) with the above constraints.