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AN4312 Datasheet(PDF) 22 Page - STMicroelectronics

No. de pieza AN4312
Descripción Electrónicos  Guidelines for designing touch sensing applications with surface sensors
PDF  36 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4312 Datasheet(HTML) 22 Page - STMicroelectronics

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Surface sensor design
AN4312
22/36
DocID024815 Rev 1
3.3.2
Interlaced patterned linear sensor
When using the charge transfer acquisition principle, it is possible to use only three
channels thanks to the higher resolution achieved.
Figure 17. Interlaced linear touch sensor with 3 channels / 4 electrodes
(half-ended electrodes design)
1. The teeth of the interlaced linear touch sensor must be perfectly regular.
MS32449V1
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



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