GENERAL DESCRIPTION
The AD9845B is an improved version of the AD9845A CCD signal processor. It features a 30 MHz single-channel architecture designed to sample and condition the outputs of interlaced and progressive scan area CCD arrays. The AD9845B’s signal chain consists of an input clamp, a correlated double sampler (CDS), PxGA, a digitally controlled VGA, a black level clamp, and a 12-bit A/D converter. Additional input modes are also provided for processing analog video signals.

FEATURES
   Pin Compatible with AD9845A Designs
   12-Bit 30 MSPS A/D Converter
   30 MSPS Correlated Double Sampler (CDS)
   4 dB ± 6 dB 6-Bit Pixel Gain Amplifier (PxGA®)
   2 dB to 36 dB 10-Bit Variable Gain Amplifier (VGA)
   Low Noise Clamp Circuits
   Preblanking Function
   Auxiliary Inputs with VGA and Input Clamp
   3-Wire Serial Digital Interface
   3 V Single-Supply Operation
   Low Power: 153 mW @ 3 V Supply
   Space-Saving 48-Lead LQFP Package

APPLICATIONS
   High Performance Digital Still Cameras
   Industrial/Scientific Imaging