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STM32F303X6 Datasheet(PDF) 95 Page - STMicroelectronics |
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STM32F303X6 Datasheet(HTML) 95 Page - STMicroelectronics |
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95 / 124 page  DS9866 Rev 8 95/124 STM32F303x6/x8 Electrical characteristics 102 Figure 30. ADC accuracy characteristics Table 64. ADC accuracy(1)(2) at 1MSPS Symbol Parameter Test conditions Typ. Max(3) Unit ET Total unadjusted error ADC Freq. ≤ 72 MHz Sampling Freq. ≤ 1MSPS 2 V ≤ VDDA = VREF+ ≤ 3.6 V Single-ended mode Fast channel ±2.5 ±5 LSB Slow channel ±3.5 ±5 EO Offset error Fast channel ±1 ±2.5 Slow channel ±1.5 ±2.5 EG Gain error Fast channel ±2 ±3 Slow channel ±3 ±4 ED Differential linearity error Fast channel ±0.7 ± 2 Slow channel ±0.7 ±2 EL Integral linearity error Fast channel ±1 ±3 Slow channel ±1.2 ±3 1. ADC DC accuracy values are measured after internal calibration. 2. ADC accuracy vs. negative Injection Current: Injecting negative current on any analog input pins must 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. Any positive injection current within the limits specified for IINJ(PIN) and ∑IINJ(PIN) in Section 6.3.14: I/O port characteristics does not affect the ADC accuracy. 3. Data based on characterization results, not tested in production. EO EG 1LSBIDEAL (1) Example of an actual transfer curve (2) The ideal transfer curve (3) End point correlation line ET=Total Unadjusted Error: maximum deviation between the actual and the ideal transfer curves. EO=Offset Error: deviation between the first actual transition and the first ideal one. EG=Gain Error: deviation between the last ideal transition and the last actual one. ED=Differential Linearity Error: maximum deviation between actual steps and the ideal one. EL=Integral Linearity Error: maximum deviation between any actual transition and the end point correlation line. 4095 4094 4093 5 4 3 2 1 0 7 6 1 2 3 456 7 4093 4094 4095 4096 (1) (2) ET ED EL (3) VDDA VSSA VDDA 4096 1LSBIDEAL = MS34980V1 |
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