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ST72325AR7-Auto Datasheet(PDF) 219 Page - STMicroelectronics |
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ST72325AR7-Auto Datasheet(HTML) 219 Page - STMicroelectronics |
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219 / 243 page ![]() Obsolete Product(s) - Obsolete Product(s) ST72325xxx-Auto Electrical characteristics Doc ID 13770 Rev 3 219/243 19.12 10-bit ADC characteristics Subject to general operating conditions for VDD, fCPU, and TA unless otherwise specified. Table 137. 10-bit ADC characteristics Symbol Parameter Conditions Min Typ Max Unit fADC ADC clock frequency 0.4 2 MHz VAREF Analog reference voltage 0.7*VDD < VAREF < VDD 3.8 VDD V VAIN Conversion voltage range(1) VSSA VAREF Ilkg Input leakage current for analog input(2) -40°C < TA < 85°C range ±250 nA Other TA ranges ±1 µA RAIN External input impedance See Figure 95 and Figure 96 k CAIN External capacitor on analog input pF fAIN Variation frequency of analog input signal Hz CADC Internal sample and hold capacitor 12 pF tADC Conversion time (Sample + Hold) fCPU = 8 MHz, speed = 0, fADC =2MHz 7.5 µs tADC No. of sample capacitor loading cycles 4 1/fADC No. of hold conversion cycles 11 1. Any added external serial resistor will downgrade the ADC accuracy (especially for resistance greater than 10k ). Data based on characterization results, not tested in production. 2. Injecting negative current on adjacent pins may result in increased leakage currents. Software filtering of the converted analog value is recommended. |
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