HEAD UNIT AND LIQUID EJECTING APPARATUS

There is provided a head unit in which a first print head that ejects a liquid includes: a first nozzle for ejecting the liquid according to change in the volume of the first pressure chamber; and a first temperature detection section that detects first temperature information corresponding to a temperature of the first pressure chamber and outputs the first temperature information as a first temperature signal, and a temperature information output circuit that outputs a temperature information signal indicating a temperature of the first print head includes: a first amplification circuit that amplifies a difference between a first reference potential signal and the first temperature signal, an output control circuit that outputs a temperature information signal according to an output of the first amplification circuit, and a reference voltage control circuit that controls a voltage value of the first reference potential signal.