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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32L431 датащи(PDF) 143 Page - STMicroelectronics |
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STM32L431 датащи(HTML) 143 Page - STMicroelectronics |
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143 / 200 page  DocID028800 Rev 1 143/200 STM32L431xx Electrical characteristics 168 Figure 30. ADC accuracy characteristics THD Total harmonic distortion ADC clock frequency ≤ 26 MHz, 1.65 V ≤ VDDA = VREF+ ≤ 3.6 V, Voltage scaling Range 2 Single ended Fast channel (max speed) - -71 -69 dB Slow channel (max speed) - -71 -69 Differential Fast channel (max speed) - -73 -72 Slow channel (max speed) - -73 -72 1. Guaranteed by design. 2. ADC DC accuracy values are measured after internal calibration. 3. ADC accuracy vs. negative Injection Current: Injecting negative current on any analog input pins should be avoided as this significantly reduces the accuracy of the conversion being performed on another analog input. It is recommended to add a Schottky diode (pin to ground) to analog pins which may potentially inject negative current. 4. The I/O analog switch voltage booster is enable when VDDA < 2.4 V (BOOSTEN = 1 in the SYSCFG_CFGR1 when VDDA < 2.4 V). It is disable when VDDA ≥ 2.4 V. No oversampling. Table 69. ADC accuracy - limited test conditions 4(1)(2)(3) (continued) Sym- bol Parameter Conditions(4) Min Typ Max Unit |
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