TUSB211 Eye Diagram test fail

Patrick Chen

Other Parts Discussed in Thread: TUSB211

Hello

Customer use TUSB211 but eye diagram test fail. Below is topology and schematics. Do you have any suggestion to pass eye diagram? Thank you.

Patrick

over 8 years ago

0 Diego Cortes over 8 years ago

TI__Mastermind 36085 points

Hello Patrick,

I see two issues here; the first one is that the eye amplitude is lower than the expected (the TUSB211 corrects the slew rate but not the amplitude), so I suggest to try to increment the signal amplitude by configuring the BMC. On the other hand it would be useful to include a second TUSB211 to the signal path.

Regards,
Diego.

0 Patrick Chen over 8 years ago in reply to Diego Cortes

Mastermind 8875 points

Thanks Diego.

Do you mean add another TUSB211 on signal path to enhance, right?

BR
Patrick

0 Diego Cortes over 8 years ago in reply to Patrick Chen

TI__Mastermind 36085 points

Hello Patrick

That's correct, but customer rather increase the differential output amplitude first (if it is possible).

Regards,

Diego.

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TUSB211 Eye Diagram test fail