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STM32F411CC 데이터시트(PDF) 113 Page - STMicroelectronics |
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STM32F411CC 데이터시트(HTML) 113 Page - STMicroelectronics |
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113 / 149 page ![]() DocID026289 Rev 6 113/149 STM32F411xC STM32F411xE Electrical characteristics 123 Figure 39. USB OTG FS timings: definition of data signal rise and fall time 6.3.20 12-bit ADC characteristics Unless otherwise specified, the parameters given in Table 65 are derived from tests performed under the ambient temperature, fPCLK2 frequency and VDDA supply voltage conditions summarized in Table 14. Table 64. USB OTG FS electrical characteristics(1) 1. Guaranteed by design. Driver characteristics Symbol Parameter Conditions Min Max Unit tr Rise time(2) 2. Measured from 10% to 90% of the data signal. For more detailed informations, please refer to USB Specification - Chapter 7 (version 2.0). CL = 50 pF 420 ns tf Fall time(2) CL = 50 pF 4 20 ns trfm Rise/ fall time matching tr/tf 90 110 % VCRS Output signal crossover voltage 1.3 2.0 V Table 65. ADC characteristics Symbol Parameter Conditions Min Typ Max Unit VDDA Power supply VDDA −VREF+ < 1.2 V 1.7(1) -3.6 V VREF+ Positive reference voltage 1.7(1) -VDDA V fADC ADC clock frequency VDDA = 1.7(1) to 2.4 V 0.6 15 18 MHz VDDA = 2.4 to 3.6 V 0.6 30 36 MHz fTRIG(2) External trigger frequency fADC = 30 MHz, 12-bit resolution - - 1764 kHz -- 17 1/fADC VAIN Conversion voltage range(3) 0 (VSSA or VREF- tied to ground) -VREF+ V RAIN(2) External input impedance See Equation 1 for details -- 50 k Ω RADC(2)(4) Sampling switch resistance - - 6 k Ω CADC(2) Internal sample and hold capacitor -4 7 pF |
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