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STM32L432KB 数据表(PDF) 111 Page - STMicroelectronics |
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STM32L432KB 数据表(HTML) 111 Page - STMicroelectronics |
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111 / 149 page  RAIN TS fADC CADC 2 N2 + () ln × × ---------------------------------------------------------------- RADC – < DocID028798 Rev 2 111/149 STM32L432KB STM3L432KC Electrical characteristics 142 Equation 1: RAIN max formula The formula above (Equation 1) is used to determine the maximum external impedance allowed for an error below 1/4 of LSB. Here N = 12 (from 12-bit resolution). Table 62. Maximum ADC RAIN(1)(2) Resolution Sampling cycle @80 MHz Sampling time [ns] @80 MHz RAIN max (Ω) Fast channels(3) Slow channels(4) 12 bits 2.5 31.25 100 N/A 6.5 81.25 330 100 12.5 156.25 680 470 24.5 306.25 1500 1200 47.5 593.75 2200 1800 92.5 1156.25 4700 3900 247.5 3093.75 12000 10000 640.5 8006.75 39000 33000 10 bits 2.5 31.25 120 N/A 6.5 81.25 390 180 12.5 156.25 820 560 24.5 306.25 1500 1200 47.5 593.75 2200 1800 92.5 1156.25 5600 4700 247.5 3093.75 12000 10000 640.5 8006.75 47000 39000 8 bits 2.5 31.25 180 N/A 6.5 81.25 470 270 12.5 156.25 1000 680 24.5 306.25 1800 1500 47.5 593.75 2700 2200 92.5 1156.25 6800 5600 247.5 3093.75 15000 12000 640.5 8006.75 50000 50000 |
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