Datasheet > LM9812

LM9812

更新时间： 2024-09-24 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
37页	481K
描述
LM9812 30-Bit Color Linear CCD Sensor Processor

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LM9812 数据手册

December 1997

LM9812 30-Bit Color Linear CCD Sensor Processor

General Description

Features

The LM9812 is a high performance integrated signal proces-

sor/digitizer for color linear CCD image scanners. The LM9812

performs all the signal processing (correlated double sampling,

pixel rate offset and shading correction, color balance control,

and 10-bit analog-to-digital conversion) necessary to maximize

the performance of a wide range of linear CCD sensors.

• 6 million pixels/s conversion rate (2MHz/channel x 3)

• Pixel rate shading (gain) correction for individual pixels

eliminates errors from PRNU, illumination, etc.

• Digitally programmed color balance controls

• Pixel rate offset correction for highest quality in dark regions

• Correlated Double Sampling for lowest noise

• Reference and signal sampling points digitally controlled in

20ns increments

• 2x and 4x analog fast preview/low resolution modes

• Digital control of CCD integration time

• Generates all necessary CCD clock signals

• Compatible with a wide range of color linear CCDs and

Contact Image Sensors (CIS)

The LM9812 can be digitally programmed to work with a wide

variety of CCDs from different manufacturers, including both 3

output RGB and 2 output GRGB CCDs. An internal Configura-

tion Register sets CCD and sampling timing to maximize perfor-

mance, simplifying the design and manufacturing processes. For

complementary voltage reference see the LM4041-ADJ.

• TTL/CMOS input/output compatible

Applications

Key Specifications

• Color Flatbed Document Scanners

• Color Sheetfed Scanners

• Multifunction Imaging Products

• Digital Copiers

• Output Data Resolution

• Pixel Conversion Rate (total)

• Supply Voltage

10 Bits

6MHz

+5V±5%

• General Purpose Linear CCD Imaging

• Supply Voltage (Digital I/O)

• Power Dissipation (typical)

+3.3V±10% or +5V±5%

390mW

Connection Diagrams

1 52 51 50 49 48 47

TR2

TR1

ø2

ø1

RUN/STOP

SYNC

DI/O

LM9812CCV

DGND

I/O

MCLK

OCLK

GCLK

RD PIXEL

21 22 23 24 25 26 27 28 29 30 31 32 33

Ordering Information

Commercial (0°C ≤ T_A≤ +70°C)

Package

V52A 52 Pin Plastic Leaded Chip Carrier

LM9812CCV

TRI-STATE® is a registered trademark of National Semiconductor Corporation.

http://www.national.com

12 3 4 5 6 7...37

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与LM9812相关器件

型号	品牌	获取价格	描述	数据表
LM9812CCV	NSC	获取价格	LM9812 30-Bit Color Linear CCD Sensor Processor
LM9820	ETC	获取价格
LM9820CCWM	NSC	获取价格	LM9810/20 10/12-Bit Image Sensor Processor Analog Front End
LM9820CCWMX	NSC	获取价格	LM9810/20 10/12-Bit Image Sensor Processor Analog Front End
LM9822	NSC	获取价格	LM9822 3 Channel 42-Bit Color Scanner Analog Front End
LM9822_14	TI	获取价格	3 Channel 42-Bit Color Scanner Analog Front End
LM9822CCWM	TI	获取价格	3 Channel 42-Bit Color Scanner Analog Front End
LM9822CCWM/NOPB	TI	获取价格	3 Channel 42-Bit Color Scanner Analog Front End 28-SOIC 0 to 70
LM9822CCWM1	NSC	获取价格	LM9822 3 Channel 42-Bit Color Scanner Analog Front End
LM9822CCWM1	TI	获取价格	3 Channel 42-Bit Color Scanner Analog Front End

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