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: 140 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