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