AD9991 datasheet(1/60 Pages) AD

Part #	AD9991

Description	10-Bit CCD Signal Processor with Precision Timing Generator

PDF	60 Pages

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Manufacturer	AD [Analog Devices]

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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

that may result from its use. No license is granted by implication or oth-

erwise under any patent or patent rights of Analog Devices. Trademarks

and registered trademarks are the property of their respective companies.

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

Tel: 781/329-4700

www.analog.com

Fax: 781/326-8703

AD9991

10-Bit CCD Signal Processor with

Precision Timing ™ Generator

FEATURES

6-Phase Vertical Transfer Clock Support

Correlated Double Sampler (CDS)

6 dB to 42 dB 10-Bit Variable Gain Ampliﬁer (VGA)

10-Bit 27 MHz A/D Converter

Black Level Clamp with Variable Level Control

Complete On-Chip Timing Generator

Precision Timing Core with 800 ps Resolution

On-Chip 3 V Horizontal and RG Drivers

2-Phase and 4-Phase H-Clock Modes

Electronic and Mechanical Shutter Modes

On-Chip Driver for External Crystal

On-Chip Sync Generator with External Sync Input

56-Lead LFCSP Package

APPLICATIONS

Digital Still Cameras

Digital Video Camcorders

Industrial Imaging

GENERAL DESCRIPTION

The AD9991 is a highly integrated CCD signal processor for

digital still camera and camcorder applications. It includes a

complete analog front end with A/D conversion, combined with a

full-function programmable timing generator. The timing genera-

tor is capable of supporting both 4- and 6-phase vertical clocking.

A Precision Timing core allows adjustment of high speed clocks

with 800 ps resolution at 27 MHz operation.

The AD9991 is speciﬁed at pixel rates of up to 27 MHz. The

analog front end includes black level clamping, CDS, VGA,

and a 10-bit A/D converter. The timing generator provides all

the necessary CCD clocks: RG, H-clocks, V-clocks, sensor gate

pulses, substrate clock, and substrate bias control. Operation is

programmed using a 3-wire serial interface.

Packaged in a space-saving 56-lead LFCSP, the AD9991 is speci-

ﬁed over an operating temperature range of –20°C to +85°C.

FUNCTIONAL BLOCK DIAGRAM

AD9991

CDS

VGA

CLAMP

10-BIT

ADC

10

DCLK

MSHUT

STROBE

CLO

CLI

DOUT

VREF

6dB TO 42dB

HORIZONTAL

DRIVERS

V-H

CONTROL

4

6

5

RG

H1–H4

V1–V6

VSG1–VSG5

VRT

VRB

PRECISION

TIMING

GENERATOR

SYNC

GENERATOR

INTERNAL CLOCKS

VSUB SUBCK

HD

VD

SYNC

INTERNAL

REGISTERS

SL SCK DATA

CCDIN

REV. 0

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