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STM32L462CEU6 数据表(PDF) 136 Page - STMicroelectronics |
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STM32L462CEU6 数据表(HTML) 136 Page - STMicroelectronics |
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136 / 198 page  Electrical characteristics STM32L462CE STM32L462RE STM32L462VE 136/198 DocID029969 Rev 1 6.3.17 Analog-to-Digital converter characteristics Unless otherwise specified, the parameters given in Table 63 are preliminary values derived from tests performed under ambient temperature, fPCLK frequency and VDDA supply voltage conditions summarized in Table 20: General operating conditions. Note: It is recommended to perform a calibration after each power-up. Table 63. 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 VCMIN Input common mode Differential mode (VREF++ VREF-)/2 - 0.18 (VREF++ VREF-)/2 (VREF++ VREF-)/2 + 0.18 V 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 |
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