REV. 0

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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

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a

AD9806

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., 2001

Complete 10-Bit 18 MSPS

CCD Signal Processor

FUNCTIONAL BLOCK DIAGRAM

PGA

0dB

0dB

CLAMP

3

REF

10-BIT

DAC

INTF

AD9806

10

PBLK

CLPOB

3-W INTF

ADCIN AUXIN

SHP

SHD ADCCLK

DOUT

VRT

VRB

CCDIN

DAC1

DAC2

CLPDM

TIMING

GENERATOR

MUX

S/H

CDS

ADC

8-BIT

DAC

8-BIT

DAC

AUXMID

–4

PGA

PGA

CLAMP

CLAMP

FEATURES

Pin-Compatible with Industry Standard AD9803

18 MSPS Correlated Double Sampler (CDS)

Low Noise PGA with 0 dB to 34 dB Gain Range

Low Noise Clamp Circuits

Analog Preblanking Function

10-Bit 18 MSPS A/D Converter

AUX Input with Input Clamp and PGA

Direct ADC Input with Input Clamp

AUXMID Input with PGA

3-Wire Serial Interface for Digital Control

Two Auxiliary 8-Bit DACs

3 V Single Supply Operation

Low Power: 65 mW @ 2.7 V Supply

48-Lead LQFP Package

APPLICATIONS

Camcorders (8 mm and DVC)

Digital Still Cameras

PRODUCT DESCRIPTION

The AD9806 is a complete analog signal processor for CCD

applications. It features an 18 MHz single-channel architecture

designed to sample and condition the outputs of interlaced and

progressive scan area CCD arrays. The AD9806’s signal chain

consists of an input clamp, correlated double sampler (CDS),

digitally programmable gain amplifier (PGA), black level clamp,

and 10-bit A/D converter. Additional input modes are provided

for processing analog video signals.

The internal registers are programmed through a 3-wire serial

digital interface. Programmable features include gain adjust-

ment, black level adjustment, input configuration, and power-

down modes.

The AD9806 operates from a single 3 V power supply, typically

dissipating 75 mW. Packaged in a space-saving 48-lead LQFP,

the AD9806 is specified over an operating temperature range of

–20

°C to +85 C.