Digital to analogue voltage converter

A digital to analogue voltage converter (DAC) comprising: a first resistor string having a plurality of resistors; and a plurality of DAC stages, each DAC stage coupled to said first resistor string and comprising: a voltage buffer; a first switching stage coupled to the first resistor string, the first switching stage configured to provide an input to the voltage buffer in dependence on receiving a first sub-word of a digital input; a second resistor string having one or more resistors, wherein a first end of the second resistor string is coupled to a current source and a second end of the second resistor string is coupled to an output of the voltage buffer; and a second switching stage coupled to the second resistor string and configured to provide an output of the DAC stage in dependence on receiving a second sub-word of the digital input.