We want to reference TIDA-00506 to do Kick-To-Open.
How to connect from FDC1004 to sensor? ( need connect to GND? )
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As mentioned before in the previous post, we typically use the isolated sensor topology for proximity sensing since ground planes or ground sources nearby the sensor will reduce sensitivity. Please disconnect the GND plane in the middle and check sensing distance. Also, sensing distance will also be affected by using a SHLD. So check out sensitivity with and without the SHLD plane connected.
Capacitive Sensing Applications