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STM32H747AI データシート(PDF) 193 Page - STMicroelectronics |
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STM32H747AI データシート(HTML) 193 Page - STMicroelectronics |
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193 / 252 page  DS12930 Rev 1 183/242 STM32H747xI/G Electrical characteristics 221 Note: ADC accuracy vs. negative injection current: injecting a 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 currents. Any positive injection current within the limits specified for IINJ(PIN) and ΣIINJ(PIN) in Section 6.3.17 does not affect the ADC accuracy. Table 100. ADC accuracy(1)(2) Symbol Parameter Conditions(3) Min Typ Max Unit ET Total undadjusted error Direct channel Single ended - +10/–20 - LSB Differential - ±15 - Fast channel Single ended - +10/–20 - Differential - ±15 - Slow channel Single ended - ±10 - Differential ±10 - EO Offset error - - ±10 - EG Gain error - - ±15 - ED Differential linearity error Single ended - +3/–1 - Differential - +4.5/–1 - EL Integral linearity error Direct channel Single ended - ±11 - Differential - ±7 - Fast channel Single ended - ±13 - Differential - ±7 - Slow channel Single ended - ±10 - Differential - ±6 - ENOB Effective number of bits Single ended - 12.2 - Bits Differential - 13.2 - SINAD Signal-to-noise and distortion ratio Single ended - 75.2 - dB Differential - 81.2 - SNR Signal-to-noise ratio Single ended - 77.0 - Differential - 81.0 - THD Total harmonic distortion Single ended - 87 - Differential - 90 - 1. Data guaranteed by characterization for BGA packages. The values for LQFP packages might differ. 2. ADC DC accuracy values are measured after internal calibration. 3. ADC clock frequency = 25 MHz, ADC resolution = 16 bits, VDDA=VREF+=3.3 V and BOOST=11. |
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