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STM32469VG Scheda tecnica(PDF) 159 Page - STMicroelectronics |
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STM32469VG Scheda tecnica(HTML) 159 Page - STMicroelectronics |
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159 / 220 page  DS11189 Rev 7 159/220 STM32F469xx Electrical characteristics 191 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 IINJ(PIN) in Section 5.3.20 does not affect the ADC accuracy. Table 80. ADC dynamic accuracy at fADC = 18 MHz - limited test conditions(1) Symbol Parameter Test conditions Min Typ Max Unit ENOB Effective number of bits fADC =18 MHz VDDA = VREF+= 1.7 V Input Frequency = 20 KHz Temperature = 25 °C 10.3 10.4 - bits SINAD Signal-to-noise and distortion ratio 64 64.2 - dB SNR Signal-to-noise ratio 64 65 - THD Total harmonic distortion − 67 − 72 - 1. Guaranteed based on test during characterization. Table 81. ADC dynamic accuracy at fADC = 36 MHz - limited test conditions(1) Symbol Parameter Test conditions Min Typ Max Unit ENOB Effective number of bits fADC =36 MHz VDDA = VREF+ = 3.3 V Input Frequency = 20 KHz Temperature = 25 °C 10.6 10.8 - bits SINAD Signal-to noise and distortion ratio 66 67 - dB SNR Signal-to noise ratio 64 68 - THD Total harmonic distortion − 70 − 72 - 1. Guaranteed based on test during characterization. |
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