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AN4038 bảng dữ liệu(PDF) 13 Page - STMicroelectronics

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Giải thích chi tiết về linh kiện  Guidelines to optimize proximity detection with STM8TL5xxx capacitive sensors
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AN4038 bảng dữ liệu(HTML) 13 Page - STMicroelectronics

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AN4038
STM8TL5xxx sensitivity setting
Doc ID 022686 Rev 1
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Figure 9.
Noise versus target reference
To avoid any false proximity detection and to guarantee system stability, the detection
threshold value (see Section 3.3: Detection threshold) must be set to filter out noise on the
acquisition signal.
Figure 10 shows the test for detection distance versus the target reference with the best
detection threshold value (see how to select the best threshold in Section 3.3: Detection
threshold). This test was performed using sensor #10 (see Figure 2).
Figure 10.
Detection distance versus target reference with best detection threshold
With an optimum detection threshold setup, the detection distance increases slowly when
the target reference increases significantly.



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