DP83826E: Measures to optimize radiated susceptibility

Part Number: DP83826E

Hi all

My customer is using the DP83826ERHBR.

During the radiated susceptibility tests at 10V/m they lost the ethernet communication with the DP83826ERHBR (acceptance criteria A).

This was for frequencies in the 1.3 – 1.6 GHz range.

What are the critical points to watch out for to improve the susceptibility to radiated emissions ?

Please comment and point to helpful collateral.

Thank you and best regards

Ueli

over 4 years ago

0 Geet Modi over 4 years ago

TI__Mastermind 26320 points

Please refer to below layout guidelines needed to improve the EMC performance

https://www.ti.com/lit/an/snla387/snla387.pdf

Regards,
Geet

0 Ue over 4 years ago in reply to Geet Modi

TI__Genius 17175 points

Geet

Thank you for the quick reply and for pointing to the application note.

Do you have specific recommendations as how to filter / suppress the 1.3GHz ... 1.6GHz radiated interference ?

Should the customer use an LC lowpass at the MDI-pins ? .... and if yes what components do you recommend (ferrite bead part number and capacitor value) ?

Any other measures that can be helpful here ?

Best regards

Ueli

+1 Geet Modi over 4 years ago in reply to Ue

TI__Mastermind 26320 points

Hi Ueli,

I have updated with test setup and test results of DP83826 EVM over email.

Regards,
Geet

+1 Ue over 4 years ago in reply to Geet Modi

TI__Genius 17175 points

Hi Geet

Got it, thank you !

Best regards

Ueli

Interface

Interface forum

DP83826E: Measures to optimize radiated susceptibility