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STM32L475VG Arkusz danych(PDF) 134 Page - STMicroelectronics |
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STM32L475VG Arkusz danych(HTML) 134 Page - STMicroelectronics |
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134 / 193 page  Electrical characteristics STM32L475xx 134/193 DocID027692 Rev 2 6.3.17 Analog-to-Digital converter characteristics Unless otherwise specified, the parameters given in Table 64 are preliminary values derived from tests performed under ambient temperature, fPCLK frequency and VDDA supply voltage conditions summarized in Table 22: General operating conditions. Note: It is recommended to perform a calibration after each power-up. Table 64. ADC characteristics(1) (2) Symbol Parameter Conditions Min Typ Max Unit VDDA Analog supply voltage - 1.62 - 3.6 V VREF+ Positive reference voltage VDDA ≥ 2 V 2 - VDDA V VDDA < 2 V VDDA V VREF- Negative reference voltage -VSSA V fADC ADC clock frequency Range 1 - - 80 MHz Range 2 - - 26 fs Sampling rate for FAST channels Resolution = 12 bits - - 5.33 Msps Resolution = 10 bits - - 6.15 Resolution = 8 bits - - 7.27 Resolution = 6 bits - - 8.88 Sampling rate for SLOW channels Resolution = 12 bits - - 4.21 Resolution = 10 bits - - 4.71 Resolution = 8 bits - - 5.33 Resolution = 6 bits - - 6.15 fTRIG External trigger frequency fADC = 80 MHz Resolution = 12 bits - - 5.33 MHz Resolution = 12 bits - - 15 1/fADC VAIN (3) Conversion voltage range(2) -0 - VREF+ V RAIN External input impedance - - - 50 kΩ CADC Internal sample and hold capacitor -- 5 - pF tSTAB Power-up time - 1 conversion cycle tCAL Calibration time fADC = 80 MHz 1.45 µs -116 1/fADC tLATR Trigger conversion latency Regular and injected channels without conversion abort CKMODE = 00 1.5 2 2.5 1/fADC CKMODE = 01 - - 2.0 CKMODE = 10 - - 2.25 CKMODE = 11 - - 2.125 |
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