5.5.2 Linear or slider
A linear is a set of contiguous capacitive electrodes. Figure 9. Interlaced linear touch sensor with 3 channels / 4
electrodes (half-ended electrodes design) shows a slider used on a discovery board.
Figure 9. Interlaced linear touch sensor with 3 channels / 4 electrodes (half-ended electrodes design)
Legend:
Via between layers
10% meshed ground plane
Copper electrode
Up to 60 mm
Full band width 3.6 mm
Electrode gap 0.2~0.3 mm
Tooth pitch
2.4 mm
Squared end
0.2~0.3 mm
Electrode/ground
gap 2 mm
Table 8. Linear touch sensor documentation gives a list of documents containing information about the linear
touch sensor.
Table 8. Linear touch sensor documentation
Id
Title Chapters
UM1913
Developing applications on STM32Cube with
STMTouch
®
touch sensing library
Linear and rotary touch sensors
AN4312
Guidelines for designing touch sensing
applications with surface sensors
Linear sensor
AN5105
Sensors
AN5105 - Rev 1
page 12/52
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