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LM9801

更新时间： 2024-11-18 22:30:31
品牌 Logo 应用领域
美国国家半导体 - NSC 传感器
页数 文件大小 规格书
34页 512K
描述
Greyscale/24-Bit Color Linear CCD Sensor Processor

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LM9801 数据手册

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June 1996  
LM9801 8-Bit Greyscale/24-Bit Color Linear  
CCD Sensor Processor  
General Description  
Features  
Y
2.5 Million pixels/s conversion rate  
The LM9801 is a high performance integrated signal proc-  
essor/digitizer for linear CCD image scanners. The LM9801  
performs all the analog processing (correlated double sam-  
pling for black level and offset compensation, pixel-by-pixel  
gain (shading) correction, and 8-bit analog-to-digital conver-  
sion) necessary to maximize the performance of a wide  
range of linear CCD sensors.  
Y
Pixel-rate shading correction for individual pixels maxi-  
mizes dynamic range and resolution, even on ‘‘weak’’  
pixels  
Y
Y
Implements Correlated Double Sampling for minimum  
noise and offset error  
Reference and signal sampling points digitally con-  
trolled in 25 ns increments for maximum performance  
Generates all necessary CCD clock signals  
Compatible with a wide range of linear CCDs  
Supports some Contact Image Sensors (CIS)  
TTL/CMOS input/output compatible  
The LM9801 can be digitally programmed to work with a  
wide variety of CCDs from different manufacturers. An inter-  
nal configuration register sets CCD and sampling timing to  
maximize performance, simplifying the design and manufac-  
turing processes.  
Y
Y
Y
Y
The LM9801 can be used with parallel output color CCDs. A  
signal inversion mode eases use with CIS sensors. For com-  
plementary voltage reference see the LM4041.  
Key Specifications  
Y
Resolution  
8 Bits  
Y
Pixel Conversion Rate  
2.5 MHz  
Applications  
Y
Y
a
a
g
Supply Voltage  
5V  
5%  
Color and Greyscale Flatbed and Sheetfed Scanners  
Y
Supply Voltage (Digital I/O)  
a
Power Dissipation  
Y
Fax and Multifunction Peripherals  
g
g
3.3V  
10% or 5V  
5%  
Y
Digital Copiers  
Y
230 mW (max)  
Y
General Purpose Linear CCD Imaging  
Connection Diagrams  
TL/H/12814–1  
TL/H/12814–2  
Ordering Information  
s
s
a
Commercial (0 C  
§
LM9801CCV  
T
A
70 C)  
§
Package  
V52A 52-Pin Plastic Leaded Chip Carrier  
VEG52A 52-Pin Thin Quad Flatpack  
LM9801CCVF  
TRI-STATEÉ is a registered trademark of National Semiconductor Corporation.  
MICROWIRETM is a trademark of National Semiconductor Corporation.  
SPITM is a trademark of Motorola, Inc.  
C
1996 National Semiconductor Corporation  
TL/H/12814  
RRD-B30M96/Printed in U. S. A.  
http://www.national.com  
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