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2.2 CapSense
) for its low self-capacitance inside the module
Figure 3
Every CapSense controller pin has some parasitic capacitance associated with it, adding an external
resistor closed to the module (
560 Ω for Self-capacitance and 2 kΩ for Mutual-capacitance) forms a
low-pass RC filter that attenuates the RF noise amplitude coupled to the pin.
Figure 4
The simulation example below shows the mutual capacitance with different finger/sensor distance.
Please evaluate your application and the capacitance requirement of the sensor provided by
Infineon (refer to AN85951 - PSoC® 4 and PSoC® 6 MCU CapSense® Design Guide) along with
our module pin parasitic capacitance shown in
2.4 P Pin parasitic capacitance
method suits your needs.
