
Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
1
Copyright
Cirrus Logic, Inc. 1999
(All Rights Reserved)
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.cirrus.com
CS7622
CCD Imager Analog Processor
Features
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13-Bit A/D Conversion Using DRX
Technology
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Backlight Compensation
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Supports Full Scale Analog Input Voltage
Ranges from 300 mV to 1 V in 100 mV
Increments
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High Resolution Output Mode
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Low Resolution (Preview) Output Mode for
LCD Driver
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Integrated Correlated Double Sampler
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Digital Black Level Clamp
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Digital Outputs Selectable for 13, 12, or 10 Bits
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Low Power Consumption
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Power Down Mode
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High Speed Serial Interface
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Supports a Large Variety of Clock Input
Frequencies
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Low power mode option
Description
The CS7622 is a low-power analog front-end processor
for interline or frame transfer CCD imagers. Main appli-
cations include digital still image cameras and video
cameras.
The architecture includes a correlated double sampler,
black level clamp and a 13-bit A/D conversion module
using patented DRX technology.
Chip parameters can be programmed using a high
speed 4-wire asynchronous digital interface.
The chip outputs digitized CCD data in either 13-bit, 12-
bit or 10-bit format. 10-bit outputs are generated from the
13-bit A/D output by a programmable companding curve.
ORDERING INFORMATION
CS7622-IQ
-40 to +85 °C 32-pin TQFP 7x7x1.4m
CCD OUTPUT
CDS/DRX
GAIN
DATA OUT
OUTPUT
COMPANDER
REGISTER
BLOCK
SERIAL
INTERFACE
A/D
CONVERTER
BLACK
LEVEL
CLOCK OUT
CLOCK
SERIAL BUS
CK_FT
CLOCK
GENERATOR
CK_DATA
JUL ‘99
DS322PP1