7 Replies Latest reply on Mar 10, 2020 5:09 PM by YuMa_1534086

    Regarding proximity sensing pattern method(PCB trace / Wire)

    YuMa_1534086

      Hello.

       

      Below is description of CapSense application note(AN64846) about proximity sensor.

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      Wire:

      A single length of wire works well as a proximity sensor.

      The proximity distance achieved with a wire loop sensor is higher compared to a PCB trace.

      But using a wire sensor is not an optimal solution for mass production because of manufacturing cost and complexity.

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      Why is the proximity distance of wire method higher than PCB trace method?

       

      Does not wire method’s noise become larger than PCB trace?

      Because wire method can not have both GND/Shield mesh pattern and GND loop around proximity sensor.

       

      Best Regards.

      Yutaka Matsubara