To realize high accuracy and high speed we developed a new self compensation scheme and applied it to a 10-bit D/A converter. This circuit can compensate the device mismatch without interrupting the D/A converter operation. With the compensation circuit,INA decreased down to 0.22LSB from 0.47LSB. The device was fabricated using a 0.8$mu$m CMOS process. The area of the D/A converter core is 3.2mm$^{2}$ and the area of the compensation part is 0.64mm$^{2}$.