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AN4038 Fiches technique(PDF) 11 Page - STMicroelectronics

No de pièce AN4038
Description  Guidelines to optimize proximity detection with STM8TL5xxx capacitive sensors
PDF  39 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4038 Fiches technique(HTML) 11 Page - STMicroelectronics

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AN4038
STM8TL5xxx sensitivity setting
Doc ID 022686 Rev 1
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Figure 6.
Noise versus CS capacitor
When the detection threshold (Dth) is adjusted regarding the noise level (see Section 3.3:
Detection threshold), it is not influenced by the CS capacitor value. Figure 7 shows the
detection distance versus the CS capacitor with the best detection threshold value. This test
was performed using sensor #10 (see Figure 2).
Figure 7.
Detection distance versus CS capacitor with best detection threshold
With an optimized detection threshold, the CS value has no effect on the detection distance.



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