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STM32L552CEU6PTR 数据表(PDF) 239 Page - STMicroelectronics |
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STM32L552CEU6PTR 数据表(HTML) 239 Page - STMicroelectronics |
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239 / 340 page  DS12737 Rev 6 239/340 STM32L552xx Electrical characteristics 307 5.3.19 Analog-to-digital converter characteristics Unless otherwise specified, the parameters given in Table 109 are preliminary values derived from tests performed under ambient temperature, fPCLK frequency and VDDA supply voltage conditions summarized in Table 27: General operating conditions. Note: It is recommended to perform a calibration after each power-up. Table 109. 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 0 and 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 conversi on cycle tCAL Calibration time fADC = 80 MHz 1.45 µs - 116 1/fADC |
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