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LM9811CCVF Datasheet

  • LM9811CCVF

  • 10-Bit Greyscale/30-Bit Color Linear CCD Sensor Processor

  • 36頁

  • NSC

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LM9811 10-Bit Greyscale/30-Bit Color Linear CCD Sensor Processor
April 1998
LM9811
10-Bit Greyscale/30-Bit Color
Linear CCD Sensor Processor
General Description
The LM9811 is a high performance integrated signal
processor/digitizer for linear CCD image scanners. The
LM9811 performs all the analog processing (correlated
double sampling for black level and offset compensation,
pixel-by-pixel gain (shading) correction, and 10-bit
analog-to-digital conversion) necessary to maximize the per-
formance of a wide range of linear CCD sensors.
The LM9811 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.
The LM9811 can be used with parallel output color CCDs. A
signal inversion mode eases use with CIS sensors. For
complementary voltage reference see the LM4041.
Features
n
1.5 Million pixels/s conversion rate
n
Pixel-rate shading correction for individual pixels
maximizes dynamic range and resolution, even on
鈥渨eak鈥?pixels
n
Implements Correlated Double Sampling for minimum
noise and offset error
n
Reference and signal sampling points digitally controlled
in 40ns increments for maximum performance
n
Generates all necessary CCD clock signals
n
Compatible with a wide range of linear CCDs
n
Supports some Contact Image Sensors (CIS)
n
TTL/CMOS input/output compatible
Key Specifications
n
Resolution:
n
Pixel Conversion Rate:
n
Supply Voltage:
n
Supply Voltage
(Digital I/O):
n
Power Dissipation:
10 Bits
1.5MHz
+5V
鹵
5%
+3.3V
鹵
10% or +5V
鹵
5%
260mW (max)
Applications
n
n
n
n
Color and Greyscale Flatbed and Sheetfed Scanners
Fax and Multifunction Peripherals
Digital Copiers
General Purpose Linear CCD Imaging
Connection Diagrams
DS012813-1
DS012813-2
TRI-STATE
廬
is a registered trademark of National Semiconductor Corporation.
MICROWIRE
鈩?/div>
is a trademark of National Semiconductor Corporation.
SPI
鈩?/div>
is a trademark of Motorola, Inc.
漏 1999 National Semiconductor Corporation
DS012813
www.national.com

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