Slide 1 Slide 2 Slide 3 Slide 4 Slide 5 Slide 6 Slide 7 Slide 8 Slide 9 Slide 10 Slide 11 Slide 12 Product List
Cap-Sense PCB Hardware Design - Layout

As for the PCB layout, emphasis should be made on traces to Cap sense electrodes and the electrodes shown here on the right side and bottom of image. Traces should be short with the serial resistors. It is highly recommended to design PCB with four layers and run the traces in internal layer. This can greatly help in eliminating sensitivity to radiated RF noise. Use hatched ground layers to protect traces and electrodes. The hatched ground should be placed above, below and between those elements. Keep traces and electrodes separated from any internal noise sources such as the power supply or oscillator.