GENERAL DESCRIPTION
The AD9945 is a complete analog signal processor for CCD applications. It features a 40 MHz single-channel architecture designed to sample and condition the outputs of interlaced and progressive scan area CCD arrays. The AD9945’s signal chain consists of a correlated double sampler (CDS), a digitally controlled variable gain amplifier (VGA), a black level clamp, and a 12-bit A/D converter.

FEATURES
   40 MSPS Correlated Double Sampler (CDS)
   6 dB to 40 dB 10-Bit Variable Gain Amplifier (VGA)
   Low Noise Optical Black Clamp Circuit
   Preblanking Function
   12-Bit 40 MSPS A/D Converter
   No Missing Codes Guaranteed
   3-Wire Serial Digital Interface
   3 V Single-Supply Operation
   Low Power: 160 mW @ 3 V Supply
   Space-Saving 32-Lead 5 mm x 5 mm LFCSP

APPLICATIONS
   Digital Still Cameras
   Digital Video Camcorders
   PC Cameras
   Portable CCD Imaging Devices
   CCTV Cameras