TMUXHS4212: AC coupled capacitor placement recommendation on 10Gbase-T1 application

Ann_Lien

Part Number: TMUXHS4212

Hello expert,

Do we have a recommendation on AC coupled cap for 10Gbase-T1 application? We saw datasheet has three setups in below picture. Could you kindly help on this case? Thanks a lot!

Best regards,

Ann Lien

10 months ago

0 Brian Zhou 10 months ago

TI__Guru** 104520 points

Ann:

it depends what is common voltage voltage of 19Gbase-T1 signal?

Regards

Brian

0 Ann_Lien 10 months ago in reply to Brian Zhou

TI__Genius 10640 points

Hello Brian,

Could you let me know which Vcm level will use a or b or c? Thanks!

Best regards,

Ann Lien

0 Brian Zhou 10 months ago in reply to Ann_Lien

TI__Guru** 104520 points

a and b is for CM < 1.8v. C is for CM > 1.8v, so you need external bias to below 1.8v.

Regards

Brian

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TMUXHS4212: AC coupled capacitor placement recommendation on 10Gbase-T1 application