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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32F051C8 датащи(PDF) 76 Page - STMicroelectronics |
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STM32F051C8 датащи(HTML) 76 Page - STMicroelectronics |
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76 / 104 page  STM32F051x Electrical characteristics Doc ID 022265 Rev 3 77/105 6.3.15 12-bit ADC characteristics Unless otherwise specified, the parameters given in Table 54 are preliminary values derived from tests performed under ambient temperature, fPCLK2 frequency and VDDA supply voltage conditions summarized in Table 20. Note: It is recommended to perform a calibration after each power-up. Table 54. ADC characteristics Symbol Parameter Conditions Min Typ Max Unit VDDA Analog supply voltage for ADC ON 2.4 - 3.6 V fADC ADC clock frequency 0.6 - 14 MHz fS (1) Sampling rate 0.05 - 1 MHz fTRIG (1) External trigger frequency fADC = 14 MHz - - 823 kHz -- 17 1/fADC VAIN Conversion voltage range 0 - VDDA V RAIN (1) External input impedance See Equation 1 and Table 55 for details -- 50 k Ω RADC (1) Sampling switch resistance - - 1 k Ω CADC (1) Internal sample and hold capacitor -- 8 pF tCAL (1) Calibration time fADC = 14 MHz 5.9 µs 83 1/fADC tlatr (1) Trigger conversion latency fADC = fPCLK/2 = 14 MHz 0.196 µs fADC = fPCLK/2 5.5 1/fPCLK fADC = fPCLK/4 = 12 MHz 0.219 µs fADC = fPCLK/4 10.5 1/fPCLK fADC = fHSI14 = 14 MHz 0.188 - 0.259 µs JitterADC ADC jitter on trigger conversion fADC = fHSI14 -1 - 1/fHSI14 tS (1) Sampling time fADC = 14 MHz 0.107 - 17.1 µs 1.5 - 239.5 1/fADC tSTAB (1) Power-up time 0 0 1 µs tCONV (1) Total conversion time (including sampling time) fADC = 14 MHz 1 18 µs 14 to 252 (tS for sampling +12.5 for successive approximation) 1/fADC 1. Guaranteed by design, not tested in production. |
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