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Signal guard for Capacitive touch switch using CAP1298

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krishnakumar.r93

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Hi

I am designing a capacitive touch switch board using CAP1298.
It has been mentioned in the datasheet that the CS5 pin be used as a signal guard.

In my PCB, i have included the signal guard around all touchpads on oneside of the board.
Should i place the signal guard on by board's bottom also, or simply is it enough on one side alone?
 

Hi

I assume the manufacturer of the IC gives that information.
Read datasheet, application notes, design notes.
At least this is what I would do.

Klaus
 

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