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STM32G474CB Datasheet(PDF) 144 Page - STMicroelectronics |
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STM32G474CB Datasheet(HTML) 144 Page - STMicroelectronics |
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144 / 232 page  Electrical characteristics STM32G474xB STM32G474xC STM32G474xE 144/232 DS12288 Rev 1 5.3.19 Analog-to-digital converter characteristics Unless otherwise specified, the parameters given in Table 69 are preliminary values derived from tests performed under ambient temperature, fPCLK frequency and VDDA supply voltage conditions summarized in Table 17: General operating conditions. Note: It is recommended to perform a calibration after each power-up. Table 69. ADC characteristics(1) (2) Symbol Parameter Conditions Min Typ Max Unit VDDA Analog supply voltage -1.62 - 3.6 V VREF+ Positive reference voltage VDDA ≥ 2 V 2 - VDDA V VDDA < 2 V VDDA V VREF- Negative reference voltage -VSSA V VCMIN Input common mode Differential (VREF++VREF-)/2 - 0.18 (VREF+ + VREF-)/2 (VREF+ + VREF-)/2 + 0.18 V fADC ADC clock frequency Range 1, single ADC operation 0.14 - 60 MHz Range 2 - - 26 fs Sampling rate, continuous mode For given resolution and sampling time cycles (ts) 0.001 fADC / (sampling time [cycles] + resolution [bits] + 0.5) Msps TTRIG External trigger period Considering trigger conversion latency time (tLATR or tLATRINJ) -- 1ms - Resolution = 12 bits, fADC=60 MHz tconv + [tLATR or tLATRINJ] - VAIN (3) Conversion voltage range -0 - VREF+ V RAIN(4) External input impedance -- - 50 kΩ CADC Internal sample and hold capacitor -- 5 - pF tSTAB Power-up time - 1 conversi on cycle tCAL Calibration time fADC = 60 MHz 1.93 µs - 116 1/fADC |
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