The invention relates to a comparison device, an analog-to-digital converter and electronic equipment. The device comprises a voltage dividing unit, a voltage dividing switch, a comparator, a capacitor unit, a capacitor switch unit and a control unit, the capacitor unit comprises M capacitors which are connected in parallel, and the control unit is used for controlling the voltage dividing voltageoutput by the third end of the voltage dividing unit to charge the capacitor unit in a first time period; and when a first time period is reached, a comparison result is output through the output endof the comparator. The voltage offset phenomenon in the comparator can be quickly eliminated. The comparator can quickly output an accurate comparison result and can avoid outputting a wrong comparison result, and when the comparator device is applied to an analog-digital converter, due to the improvement of the accuracy of the comparator device, offset voltage can be eliminated at a high speed,so that accurate transcoding during conversion is ensured, and the working efficiency is improved.