A digital-to-analog converter is described. The digital-to-analog converter converts an m-bit digital signal into an analog signal using m weighted currents, such as m binary-weighted currents. A first weighted current may be calibrated using a reference current. The first weighted current may be compared to the reference current, and a control signal, controlling the first weighted current, may be generated to adjust the first weighted current to be substantially equal to the reference current. The first weighted current may then be compared with another of the m weighted currents (such as a second weighted current). The comparison may be used to further calibrate the first weighted current or to calibrate the second weighted current.