D/A conversion circuit and liquid crystal display device

A D/A conversion circuit provided with an analog reference power supply for using a first power supply voltage as a drive voltage and outputting a plurality of different voltages,

• a voltage selecting circuit configured to select one of said plurality of different voltages based on a string of digital data, and
• an output buffer configured to convert impedance of the voltage selected by said voltage selecting circuit, comprising:
• a charging/discharging voltage generating circuit configured to use a second power supply voltage as the drive voltage and to output a second power supply voltage correlated with said one of said plurality of different voltages of said analog reference power supply;
• and
• a current switchover circuit configured to switch a direction in which a current flows in such a manner that a charging/discharging current of an input parasitic capacitor of said output buffer passes through said charging/discharging voltage generating circuit for a predetermined period after said bit string of digital data changes, and in such a manner that said charging/discharging current passes through said analog reference power supply after said predetermined period elapses.