Design of ADC Peripheral Circuit

The main design of ADC peripheral circuit includes analog circuit,digital circuit and power circuit.The amplifying signal input is important to meet the requirement of ADC,and the stability of input voltage between ADC conversion should be kept to enable its overall performance.In order to eliminate the influence of unmatched impedance and transformation step signal change factor of simulation multi-way switch on the ADC input and sampling stage,the voltage follower with high input impedance should be used between multi-way switch and ADC.An appropriate connection form is adopted to meet the requirement of micro-controller on time sequence.The good earth method and voltage decoupling method are selected to avoid the noise disturbance.The corresponding isolation way is used to prevent the influence of noise on digital signal.