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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32F301C6 датащи(PDF) 108 Page - STMicroelectronics |
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STM32F301C6 датащи(HTML) 108 Page - STMicroelectronics |
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108 / 141 page  Electrical characteristics STM32F301x6 STM32F301x8 108/141 DS9895 Rev 8 Figure 32. ADC accuracy characteristics Figure 33. Typical connection diagram using the ADC 1. Refer to Table 63 for the values of RAIN. 2. Cparasitic represents the capacitance of the PCB (dependent on soldering and PCB layout quality) plus the pad capacitance (roughly 7 pF). A high Cparasitic value will downgrade conversion accuracy. To remedy this, fADC should be reduced. General PCB design guidelines Power supply decoupling should be performed as shown in Figure 12. The 10 nF capacitor should be ceramic (good quality) and it should be placed as close as possible to the chip. EO EG 1LSBIDEAL (1) Example of an actual transfer curve (2) The ideal transfer curve (3) End point correlation line ET=Total Unadjusted Error: maximum deviation between the actual and the ideal transfer curves. EO=Offset Error: deviation between the first actual transition and the first ideal one. EG=Gain Error: deviation between the last ideal transition and the last actual one. ED=Differential Linearity Error: maximum deviation between actual steps and the ideal one. EL=Integral Linearity Error: maximum deviation between any actual transition and the end point correlation line. 4095 4094 4093 5 4 3 2 1 0 7 6 1 2 3 456 7 4093 4094 4095 4096 (1) (2) ET ED EL (3) VDDA VSSA VDDA 4096 1LSBIDEAL = MS34980V1 12-bit converter Sample and hold ADC converter RAIN(1) AINx VAIN Cparasitic VDD VT 0.6 V VT 0.6 V IL ± 1 μA RADC CADC MS19881V3 |
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