Liquid ejecting apparatus and head unit

A liquid ejecting apparatus comprising:

• a transport section that transports a medium;
• an ejection section that ejects liquid to the medium;
• a residual vibration detection circuit that acquires a residual vibration signal corresponding to residual vibration generated in the ejection section and outputs a residual vibration detection signal corresponding to the residual vibration signal;
• a first conversion circuit that includes a comparison circuit and outputs a comparison result signal in which a logic level changes according to a comparison result between a voltage value of the residual vibration detection signal and a reference voltage value;
• a second conversion circuit that includes an A/D conversion circuit and outputs a detection voltage signal obtained by converting the residual vibration detection signal into a digital signal;
• and
• a determination circuit that determines a state of the ejection section, wherein
• the determination circuit includes
• a first determination mode in which the state of the ejection section is determined according to the comparison result signal, and
• a second determination mode in which the state of the ejection section is determined according to the detection voltage signal.