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STM32F722VCK7TR Datasheet(PDF) 158 Page - STMicroelectronics |
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STM32F722VCK7TR Datasheet(HTML) 158 Page - STMicroelectronics |
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158 / 229 page  Electrical characteristics STM32F722xx STM32F723xx 158/229 DS11853 Rev 6 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 6.3.20 does not affect the ADC accuracy. Table 70. ADC static accuracy at fADC = 36 MHz Symbol Parameter Test conditions Typ Max(1) 1. Guaranteed by characterization results. Unit ET Total unadjusted error fADC =36 MHz, VDDA = 2.4 to 3.6 V, VREF = 1.7 to 3.6 V VDDA − VREF < 1.2 V ±4 ±7 LSB EO Offset error ±2 ±3 EG Gain error ±3 ±6 ED Differential linearity error ±2 ±3 EL Integral linearity error ±3 ±6 Table 71. 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 by characterization results. Table 72. 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 by characterization results. |
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