REV. 0

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

a

AD9803

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

World Wide Web Site: http://www.analog.com

Fax: 781/326-8703

© Analog Devices, Inc., 1999

CCD Signal Processor

for Electronic Cameras

FUNCTIONAL BLOCK DIAGRAM

PGA

0–30dB

0–10dB

PGA

CLAMP

3

REF

10-BIT

DAC

INTF

AD9803

10

PBLK

PGACONT1-2

CLPOB

3-W INTF

ADCIN AUXIN

ACLP SHP SHD ADCCLK

DOUT

AUXCONT

VRT

VRB

CCDIN

DAC1

DAC2

CLPDM

TIMING

GENERATOR

MUX

S/H

CLAMP

CDS

CLAMP

ADC

8-BIT

DAC

8-BIT

DAC

FEATURES

3-Wire Serial I/F for Digital Control

18 MHz Correlated Double Sampler

Low Noise PGA with 0 dB–30 dB Range

Analog Pre-Blanking Function

AUX Input with Input Clamp and PGA

10-Bit 18 MSPS A/D Converter

Direct ADC Input with Input Clamp

Internal Voltage Reference

Two Auxiliary 8-Bit DACs

+3 V Single Supply Operation

Low Power: 150 mW at 2.7 V Supply

48-Lead LQFP Package

PRODUCT DESCRIPTION

The AD9803 is a complete CCD and video signal processor

developed for electronic cameras. It is well suited for video

camera and still-camera applications.

The 18 MHz CCD signal processing chain consists of a CDS,

low noise PGA, and 10-bit ADC. Required clamping circuitry

and a voltage reference are also provided. The AUX input

features a wideband PGA and input clamp, and can be used to

sample analog video signals.

The AD9803 nominally operates from a single 3 V power sup-

ply, typically dissipating 170 mW. The AD9803 is packaged in a

space-saving 48-lead LQFP and is specified over an operating

temperature range of –20

°C to +70°C.