DS90UB933-Q1: The BCI test is failed

aggil liang

Part Number: DS90UB933-Q1

Dear TI Team

My customer design a camera module using DS90UB933, It can't pass the BCI test, Can your give some suggestion for optimizing the performance ? Which point we can improve the system ?

over 6 years ago

0 Casey McCrea over 6 years ago

TI__Guru** 103215 points

Hello,

What BCI level was tested?

Best Regards,
Casey

0 aggil liang over 6 years ago in reply to Casey McCrea

Expert 2660 points

Hi Casey
Customer use 'substitution method' .
The image stopped is the testing result.

0 Casey McCrea over 6 years ago in reply to aggil liang

TI__Guru** 103215 points

The high speed routing for the DOUT+ trace has room for improvement. The trace should not change size except to fit the component footprints. Between the 933 and the AC coupling cap the trace is smaller than between the connector and the cap. Also the first component in the PoC network needs to be much closer (touching) the DOUT+ trace to avoid the large stub on your design. Also make sure the DOUT+ trace maintains a 50 ohm characteristic impedance with your board stackup.

Best Regards,
Casey

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DS90UB933-Q1: The BCI test is failed