The WM2152 is a high speed 12-bit analogue-to-digital converter operating on a 3.3V supply. This device includes a high bandwidth sample and hold and internal voltage references. Conversion is controlled by a single clock input. The device has a differential sample and hold input which gives excellent common-mode noise immunity and low distortion. The maximum differential input voltage can be set by the user, via two mode selection pins, to be 1V or 2V. A third PGA mode is designed particularly for single-ended input signals such as composite video sources. Singleended input signals require one side of the differential input to be tied to an external voltage source.