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Analog Devices - 10-Bit CCD Signal Processor

Numéro de référence AD9991
Description 10-Bit CCD Signal Processor
Fabricant Analog Devices 
Logo Analog Devices 





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AD9991 fiche technique
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
10-Bit CCD Signal Processor with
Precision Timing Generator
AD9991
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.
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CCDIN
RG
H1–H4
V1–V6
VSG1–VSG5
FUNCTIONAL BLOCK DIAGRAM
VRT VRB
CDS
6dB TO 42dB
VGA
VREF
AD9991
10-BIT
ADC
10
INTERNAL CLOCKS
CLAMP
HORIZONTAL
4 DRIVERS
6
V-H
5 CONTROL
PRECISION
TIMING
GENERATOR
SYNC
GENERATOR
INTERNAL
REGISTERS
DOUT
DCLK
MSHUT
STROBE
VSUB SUBCK
HD VD SYNC CLI CLO SL SCK DATA
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
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
© 2003 Analog Devices, Inc. All rights reserved.

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