QTouch Schematic and Layout Checklist [APPLICATION NOTE]
Atmel-42094C-QTouch-Schematic-and-Layout-Checklist-ApplicationNote_072014
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For a small spatially interpolated Slider the end segments are half the width of the middle two
segments
The end segments, which are connected to the same channel, need to be narrower to ensure linearity near the
ends of the Slider.
Figure 3-8.
Small Spatially Interpolated – Length 21mm to 26mm
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The first and last segments of the Slider are connected to the same channel
This needs to be ensured for both spatially and resistively interpolated QTouch Sliders.
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The track connecting end segments is placed away from the Slider
The track needs to be placed away from the Slider to prevent accidentally touching it while sliding the finger. This
can lead to incorrect position being reported.
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Medium/large spatially interpolated Sliders have segment width of 4mm or less
The segments need to be narrow to ensure that the finger interacts with more than one segment when touching
the slider. The regions between the segments must have interleaving teeth.
Figure 3-9.
Medium/Large Spatially Interpolated QTouch Slider – Length 26mm to 60mm