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MPR03x pad shape/area

Question asked by onechil on Dec 17, 2014
Latest reply on Dec 17, 2014 by onechil

The app. note in the link below suggests suggests that "The minimum pad size for Freescale’s products is 3 mm by 3 mm when using thin film overlays to about 0.5 mm thickness of acrylic or ABS plastic".

 

In a proximity sensing application, assuming the area of the object to be sensed is >= 9mm sq. and the profile of the object is planar to the sensing electrode pad on a PCB, is it accurate to interpret the 3mm x 3mm recommendation, as a 9mm sq. minimum electrode pad area for Freescale's touch sensing products?

 

Thanks,

 

 

 

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