Digital/analog converter

A digital/analog converter that converts an input digital signal to an analog signal and outputs the analog signal, comprising:

• a first input terminal and a second input terminal, a first digital signal included in a digital signal being differentially input to the first input terminal and the second input terminal;
• a first current source having a first end connected to a first potential to output a constant current;
• a first transistor having a first end connected to a second end of the first current source, and having a gate connected to the first input terminal;
• a second transistor having a first end connected the second end of the first current source, and having a gate connected to the second input terminal;
• a third transistor having a first end connected to a second end of the first transistor;
• a fourth transistor having a first end connected to a second end of the second transistor;
• a first output terminal connected to a second end of the third transistor to output a first analog signal;
• and
• a control circuit that monitors the first potential or a temperature of the third and fourth transistors, and controls gate voltages of the third transistor and the fourth transistor such that the third transistor and the fourth transistor operate in a saturation region according to the first potential or the temperature.