In a digital camcorder system, an A/D converter which converts the analog CCD(Charge Coup led Device) signal into digital codes makes an important role to determine the system performance. In this paper, an A/D converter which has 8-bit resolution and 40 MSPS conversion speed is proposed. It has an architecture of ping-pong style. With 0.8 mu m double poly and double metal CMOS technology, the experimental prototype of the proposed A/D converter has +/-0.5 LSB INL and +/-0.5 LSB DNL.