Analog-to-digital conversion circuit and control method

The invention discloses an analog-to-digital conversion circuit and a control method, the circuit comprises a pre-stage driver, a switch control circuit and an analog-to-digital converter, the pre-stage driver generates an output voltage to charge a capacitor array in the analog-to-digital converter; and the switch control circuit controls the on-off of the preceding-stage driver and the analog-to-digital converter. According to the analog-to-digital conversion circuit and the control method, the reset stage is added before sampling, so that the tail state of conversion of the analog-to-digital converter is reset to a determined state, and the situation that the linearity of a sampling signal is reduced due to the influence of nonlinear kickback noise can be eliminated. Meanwhile, by adding the pre-charging control unit, the front stage and the rear stage are isolated, the influence caused by back kick of the rear stage is further reduced, the requirement for the driving capacity of a front-stage driver can b