Digital to analog and analog to digital converter

A digital-to-analog converter comprising:

• a digital input;
• an analogue output;
• two capacitors, each capacitor having a first terminal and a second terminal;
• and
• a controller coupled to the digital input and a clock input, wherein the controller is configured to generate a switching sequence comprising at least two switch cycles dependent on the input value received on the digital input and wherein if the input value corresponds to an odd number, the controller is configured to in a first switch cycle:
• during a switch cycle first phase:
• switchably couple a reference voltage to a first terminal and a ground voltage to a second terminal of one of the two capacitors, and switchably couple a ground voltage to a first terminal and the reference voltage to a second terminal of the other of the two capacitors, and
• during a switch cycle second phase:
• switchably couple a ground voltage to the first terminal and the analogue output to the second terminal of both capacitors.