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AN2869 Scheda tecnica(PDF) 32 Page - STMicroelectronics

Il numero della parte AN2869
Spiegazioni elettronici  Guidelines for designing touch sensing applications
PDF  43 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2869 Scheda tecnica(HTML) 32 Page - STMicroelectronics

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Surface electrode design
AN2869
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Doc ID 15298 Rev 6
Figure 25.
Ground plane example
Hatched ground plane
Here are some guidelines for satisfactorily designing an application with a hatched ground
plane (see Figure 26):
●
The signal track should cross the ground lines as little as possible
●
The signal track should never follow the ground lines
Figure 26.
Hatched ground and signal tracks
3.5.7
Rotary and linear sensor recommendations
Given that the sensitivity must be very high in order to be able to detect the position most
accurately, neither the power plane nor any application signal should run under a rotary or
linear sensor.
MS18981V1
GPIO1
Key1
Key2
Key4
Key3
Rx
Rx
Rx
Rx
GPIO2
GPIO3
GPIO4
CS
Hatched ground plane (optional)
Flood ground plane (mandatory)
MS18982V1
Must be avoided
Track is OK



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