
3. ADC sample time (12pts) The most common problem with microcontroller sampling is not giving enough time for the input to charge the capacitance in the SAR ADC. The input voltage comes from a Thevenin equivalent: Vth- 3.6 V, Rth 15 k2. The input resistance of the ADC is RIN-2 kΩ in series with C1-40 pF. Draw the circuit. Choose which sample and hold time to use (1, 2, 4, 8, or 16 cycles ofADC12CLK)
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