Digital-to-analog conversion circuit, data driver, and display device

A digital-to-analog conversion circuit that converts digital data of N bits into an analog output voltage and outputs the output voltage, N being a positive number equal to or greater than 3, the digital-to-analog conversion circuit comprising:

• a differential amplifier having a plurality of input terminals and outputting the output voltage from an output terminal in accordance with a calculation result based on voltages received at the plurality of input terminals;
• and
• a first decoder receiving first and second voltages and distributing and supplying one of the first and second voltages to each of the plurality of input terminals of the differential amplifier on the basis of the digital data of the N bits,
• wherein the differential amplifier includes:
• 2K differential pairs each including an inverting input terminal to which the output voltage is commonly input and a non-inverting input terminal to which one of voltages received by the plurality of input terminals is input, the differential pairs being driven by tail currents respectively and having output pairs commonly connected with each other, K being a positive number satisfying N>K;
• an amplification stage generating the output voltage in accordance with an amplification operation based on an output signal of one or both of the output pairs of the 2K differential pairs that are commonly connected;
• and
• a tail current control circuit supplying the tail currents respectively to the 2K differential pairs on the basis of a predetermined bit of the digital data of the N bits and individually controlling current ratios of the tail currents with respect to a reference current value for the respective differential pairs, and
• the differential amplifier outputs one of voltage levels dividing the first voltage and the second voltage into 2N parts as the output voltage in accordance with the digital data of the N bits.