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AN2869 Datasheet(PDF) 34 Page - STMicroelectronics

Part # AN2869
Description  Guidelines for designing touch sensing applications
PDF  43 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2869 Datasheet(HTML) 34 Page - STMicroelectronics

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Projected sensor design
AN2869
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Doc ID 15298 Rev 6
4.1.1
Diamond type sensor
In this “diamond type” implementation, the Tx and Rx electrodes form a diamond shape
where the two electrodes are on the same layer, using a bridge (see Figure 28).
Note:
This symmetrical implementation allows swapping Rx & Tx.
Figure 28.
Diamond implementation
L
L
T
R
Gnd
Gnd
Rx
Rx
Tx
Tx
0
0
Cl
L
L
Tx (bottom layer)
Rx (Top layer)
Gnd
Gnd
Rx
Rx
Tx
Tx
0.2 to 0.5 mm
0.2 to 0.5 mm
Clearance Tx to GND = 1 mm
MS18984V2



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