Proximity Sensing Design Considerations
CY8C20xx7/S CapSense
®
Design Guide
Doc. No. 001-78329 Rev. *E
65
7.2 Design Recommendations
Using a shield electrode effectively extends the detection distance of the proximity sensor. This is particularly
helpful when the proximity sensor must operate in the presence of metal.
A wire sensor increases the beneficial effect of the shield electrode because it can be located farther from the
shield electrode.
Avoid large, solid ground-fill areas inside the proximity sensor, because this decreases the sensitivity.
Slower scan speeds provide increased sensitivity at all distances. For a proximity sensor, the scanning speed
should be very slow.
