参数资料
型号: CS7615
厂商: Cirrus Logic, Inc.
英文描述: CCD IMAGER ANALOG PROCESSOR
中文描述: CCD成像器模拟处理器
文件页数: 1/36页
文件大小: 621K
代理商: CS7615
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. 1998
(All Rights Reserved)
Cirrus Logic, Inc.
Crystal Semiconductor Products Division
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.crystal.com
CS7615
CCD Imager Analog Processor
Features
l
10-Bit A/D Converter
l
Multi-Sync CCD Timing Generator,
handles imagers up to 1000 pixels wide
l
Integrated Correlated Double Sampler
l
38 dB Automatic Analog Gain Control
l
Up to 90 dB Total Gain Adjust Range
l
Closed-Loop “Fuzzy” AGC/Exposure
l
Code 16 Black Level Clamp
l
I
2
C Control Bus
l
4-Phase Vertical CCD Timing Signals
l
No CCD Buffer Amplifier Required
l
Master Clock or Crystal Controlled
Description
The CS7615 is a low-power Analog front-end processor
for standard four-color interline transfer CCD imagers.
The architecture includes a correlated double sampler,
AGC amplifier, black-level clamp, 10-Bit A/D converter,
and a complete multi-sync CCD timing generator. The
analog CCD imager output can be directly connected to
the CS7615 input, which does not require an external
buffer amplifier. The pixel data is double sampled for im-
proved noise performance, and gain adjusted prior to
being digitized by the A/D converter. Feedback from the
A/D converter holds the image black level at code-16
(assumes 8-bit data path), addressing ITU-601 compli-
ance issues. The multi-sync CCD timing generator is
programmed via the I
2
C bus, and can be used with a
wide range of interline transfer CCD imagers up to 1000
pixels wide. The CS7615 supports full ITU-601 compli-
ance for images up to 720 pixels wide, and is compatible
with both NTSC and PAL timing. The CS7615 is de-
signed to be used along with either the CS7665 or
CS7666 Digital Color-Space Processor for CCD Camer-
as, which generates a 4:2:2 component digital video
output.
ORDERING INFORMATION
CS7615-KQ
(10 mm × 10 mm × 1.6 mm)
0
° to +70° C
44-pin TQFP
CCD Output
Master Clock
CDS/AGC
Data Out
PLL
Output
Formatter
Register
Block
I
2
C
A/D
Converter
Black
Level
Timng
Generator
AGC
Controller
CCD Timng Signals
I
2
C Bus
Clocks Out
JUL ‘98
DS231PP6
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