Digital-to-analog converter calibration system

A method of calibrating N digital-to-analog converter (DAC) cells in a DAC, where N is an integer number of DAC cells greater than 2, the method comprising:

• generating N calibration outputs using the DAC, wherein at least one of the N calibration outputs is generated by two or more of the DAC cells;
• generating N reference outputs using the DAC;
• determining N overall error values corresponding to a difference between respective individual ones of the N calibration outputs and the N reference outputs;
• and
• determining, using the N overall error values, a cell error value for each of the N DAC cells.

A digital-to-analog converter (DAC) calibration system for calibrating N DAC cells in a DAC, where N is an integer number of DAC cells greater than 2, the DAC calibration system comprising:

• a processor, configured to:
• configure the DAC to generate N reference outputs;
• configure the DAC to generate N calibration outputs;
• determine N overall error values corresponding to a difference between respective individual ones of the N calibration outputs and the N reference outputs, wherein respective groups comprised of corresponding ones of the N reference outputs and N calibration outputs are generated using a distinct combination of DAC cells, wherein each of the N DAC cells are used in at least one of the N reference outputs or the N calibration outputs;
• and
• determine, using the N overall error values, a cell error value for each of the N DAC cells.