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STM32L475VC データシート(PDF) 143 Page - STMicroelectronics |
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STM32L475VC データシート(HTML) 143 Page - STMicroelectronics |
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143 / 193 page  DocID027692 Rev 2 143/193 STM32L475xx Electrical characteristics 181 THD Total harmonic distortion ADC clock frequency ≤ 80 MHz, Sampling rate ≤ 5.33 Msps, 1.65 V ≤ VDDA = VREF+ ≤ 3.6 V, Voltage scaling Range 1 Single ended Fast channel (max speed) - -69 -67 dB Slow channel (max speed) - -71 -67 Differential Fast channel (max speed) - -72 -71 Slow channel (max speed) - -72 -71 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 68. ADC accuracy - limited test conditions 3(1)(2)(3) (continued) Sym- bol Parameter Conditions(4) Min Typ Max Unit |
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