Digital to analog converter that minimised area size and source driver including thereof

This digital-to-analog converter is disclosed in the digital-to-analog converter to convert digital data to an analog voltage: the digital data is composed of high-order bit data, control bit data and lower bit data; Control logic for receiving the more significant bits data and the control bit data; A first resistor circuit and outputting a plurality of first distribution voltage by distributing the first and second reference voltage; And a first decoder which is controlled by the control logic, selecting one of the first distribution voltage corresponding to the high-order bit data; The second resistor circuit and outputting a plurality of second distribution voltage by distributing the third reference voltage and a fourth reference voltage; And a second decoder in response to the low-order bit data, select one of the second distribution voltage; A selection circuit for selecting any one of said second and third reference voltage in accordance with the control bit data; And an output voltage, comprising: a sample-and-hold circuit for outputting an output voltage, and the analog voltage in response to the output voltage of the selection circuit of the second decoder, the control logic of the first decoder, the control bit data depending on, and controls the first decoder so that the output voltage of the first decoder is selectively increased by a predetermined voltage.