D/A CONVERTER

PROBLEM TO BE SOLVED: To shorten a settling time by reducing a conversion error irrespective of a change in conversion input data.SOLUTION: A first conversion circuit 2 is a voltage potentiometer type D/A converter and D/A-converts lower two bits of data DA. A second conversion circuit 3 is a D/A converter using a capacitor array 22 and D/A-converts upper two bits of the data DA. When the data DA changes from the preceding D/A conversion period, SEL, switches SW1, SW2 and switches SW3, SW4 are turned to H (A side), a C side and an A side, respectively, for initialization in a first initialization mode using a D/A conversion voltage of the upper two bits of the data DA as an initialization voltage. When the data DA remains unchanged from the preceding D/A conversion period, SEL, the switches SW1, SW2 and the switches SW3, SW4 are turned to L (B side), the C side and a B side, respectively, for initialization in a second initialization mode using the preceding D/A conversion voltage VDA as an initialization voltage.