CCS/DP83TC811R-Q1: DP83TC811R-Q1

Jin Lin

Part Number: DP83TC811R-Q1
Other Parts Discussed in Thread: DP83TC811

Tool/software: Code Composer Studio

Hi TI Phy experts,

May I know there is ripple voltage Spec at VDDA & VDDIO DP83TC811R-Q1?
My customer would like to know how many ripple voltage at VDDA & VDDIO that our Ethernet PHY can support and no problem.

Is 50mV peak to peak ok? They just want to consider use buck switch converter to provide source for VDDA & VDDIO or use LDO to support it.

Since They just worry about if they use buck converter to support VDDA & VDDIO that will impact output crystal to cause jitter performance.

over 6 years ago

0 Hung Nguyen92 over 6 years ago

TI__Expert 5670 points

Hi Jin,

DP83TC811 should work with 50mV peak to peak ripple on VDDA and VDDIO.

Regards,

Hung Nguyen

0 Jin Lin over 6 years ago in reply to Hung Nguyen92

TI__Intellectual 790 points

Nguyen,

Thanks for your feedback. I think VDDA and VDDIO should be no problem.

But according system application, there is a crystal connect to DP83TC811 output.

If VDDA and VDDIO have 50mV peak to peak ripple, does it impact the crystal then cause jitter problem?

Jin

0 Hung Nguyen92 over 6 years ago in reply to Jin Lin

TI__Expert 5670 points

Hi Jin,

50mV pk-pk ripple on VDDA and VDDIO has minimal impact on the crystal jitter.

Regards,

Hung Nguyen

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CCS/DP83TC811R-Q1: DP83TC811R-Q1