Strictly necessary cookies are on by default and cannot be turned off. Functional, Performance and Tracking/targeting/sharing cookies can be turned on below based on your preferences (this banner will remain available for you to accept cookies). You may change your cookie settings by deleting cookies from your browser. Then this banner will appear again. You can learn more details about cookies HERE.
Strictly necessary (always on)
Functional, Performance and Tracking/targeting/sharing (default off)
Question: What if the electrodes have a small DC voltage on them, will this affect CapSense? What is the range of this voltage that the devices can handle?
The sensor pads of CapSense connect to the PSoC pins through low resistance traces of a printed circuit board or flex circuit. This electrical connection needs to be under direct control of the PSoC for CapSense to work correctly. A DC voltage placed at this point will interfere with the operation of CapSense, so prevent an DC voltage from directly driving the CapSense sensor pad. The touch surface is normally covered by a millimeter or more of plastic or glass, so this provides insulation between the finger and the sensor pads. A DC voltage on the finger has no effect on the performance of CapSense, even up to many kilovolts.