TMUX1108: Relationship of Cson/Cdon with frequency

user6041007

Prodigy 180 points

Part Number: TMUX1108

hello team

In the datasheet, the test condition of cson/cdon parameter is 1Mhz；

will the capacitance varies with the signal frequency, if yes how is the relationship.

many thanks!

over 5 years ago

0 Saminah C over 5 years ago

TI__Genius 9132 points

Hi,

Thanks for using e2e. The On Capacitance of a mux does affect the mux bandwidth - See below relationship explaining how low On Capacitance can help achieve higher bandwidth.

Regards,

Saminah

0 user6041007 over 5 years ago in reply to Saminah C

Prodigy 180 points

Thank you;

What I realy want to know is would the port capacitance(cson/cdon) varies with signal frequency?

0 Saminah C over 5 years ago in reply to user6041007

TI__Genius 9132 points

No, the capacitance for the switch is fixed and does not very with the signal frequency..

The above relationship just shows when you are designing a switch, how to achieve higher bandwidth by lowering the On capacitance.

Thanks

Saminah

0 user6041007 over 5 years ago in reply to Saminah C

Prodigy 180 points

thank you very much.

It helps a lot.

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TMUX1108: Relationship of Cson/Cdon with frequency