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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ATmega16A 데이터시트(PDF) 216 Page - ATMEL Corporation |
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ATmega16A 데이터시트(HTML) 216 Page - ATMEL Corporation |
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216 / 352 page  216 8154B–AVR–07/09 ATmega16A Figure 22-8. Analog Input Circuitry 22.7.2 Analog Noise Canceling Techniques Digital circuitry inside and outside the device generates EMI which might affect the accuracy of analog measurements. If conversion accuracy is critical, the noise level can be reduced by applying the following techniques: 1. Keep analog signal paths as short as possible. Keep them well away from high-speed switching digital tracks. 2. The AVCC pin on the device should be connected to the digital V CC supply voltage via an LC network as shown in Figure 22-9. 3. Use the ADC noise canceler function to reduce induced noise from the CPU. 4. If any ADC port pins are used as digital outputs, it is essential that these do not switch while a conversion is in progress. ADCn IIH 1..100 k Ω CS/H= 14 pF VCC/2 IIL |
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