Digital-analog converter and data driver, flat panel display device using thereof

A digital-analog converter (DAC) including: a gray scale generator for generating gray scale voltages corresponding to digital data input through charge sharing between a plurality of data lines and a plurality of dummy data lines; a switching signal generator for providing operation control signals for a plurality of switches of the gray scale generator; and a reference voltage generator for generating reference voltages and for providing the reference voltages to the gray scale generator. According to the present invention, the digital-analog converter uses capacitance components existing in the respective data lines and the dummy data lines as a sampling capacitor and a holding capacitor to generate desired gray scale voltages through charge sharing between the data lines and the dummy data lines, thereby reducing area and power consumption over an existing R-string type of DAC.