LM9831CCVJDX

更新时间： 2024-11-18 22:15:55

品牌	Logo	应用领域
美国国家半导体 - NSC		/
页数	文件大小	规格书
41页	320K
描述
LM9831 42-Bit Color, 1200dpi USB Image Scanner

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中文翻译

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数据手册

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LM9831CCVJDX 数据手册

October 1999

LM9831 42-Bit Color, 1200dpi USB Image Scanner

•

Stepper motor control tightly coupled with image data buffer

management to maximize data transfer efficiency.

PWM stepper motor current control allows microstepping for

the price of fullstepping.

General Description

The LM9831 is a complete USB image scanner system on a sin-

gle IC. The LM9831 provides all the functions (image sensor

control, illumination control, analog front end, pixel processing

function image data buffer/DRAM controller, microstepping

motor controller, and USB interface) necessary to create a high

performance color scanner. The LM9831 scans images in 42 bit

color/14 bit gray, and has output data formats for 24 bit color/8

bit gray. The LM9831 supports sensors with pixel counts of up to

16384 pixels x 3 colors (1200 dpi x 13.6 inches).

USB interface for Plug and Play operation on USB-equipped

computers.

•

Serial EEPROM option for custom Vendor and Product IDs.

Support for USB bus-powered operation.

Pixel depths of 1, 2, or 4 bits are packed into bytes for faster

scans of line art and low pixel depth images.

Supports 3 channel CCDs and 1 channel CIS sensors.

3 (R, G, and B) 12-bit, user-programmable gamma correction

tables.

•

The LM9831’s low operating and suspend mode supply currents

allow design of USB bus-powered scanners. The only additional

active components required are an external 4Mbit or 16Mbit

DRAM for data buffering and power transistors for the stepper

motor.

•

Compatible with a wide range of color linear CCDs and

Contact Image Sensors (CIS).

Operates with 48MHz external crystal.

Internal bandgap voltage reference.

100 pin TQFP package

•

Applications

• Color Flatbed Document Scanners

• Color Sheetfed Document Scanners

Key Specifications

• Analog to Digital Converter Resolution

• Maximum Pixel Conversion Rate

• A4 Color 150dpi scan time

• A4 Color 300dpi scan time

• A4 Color 600dpi scan time

• Supply Voltage

14 Bits

6MHz

<10 seconds

<40 seconds

<160 seconds

Features

•

14 bit ADC digitizes at up to 6Mpixels/s (2M RGB pixels/sec).

Digital Pixel Processing provides 1200, 800, 600, 400, 300,

200, 150, and 100dpi horizontal resolution from a 1200dpi

sensor and 600, 400, 300, 200, 150, 100, 75, and 50dpi

horizontal resolution from a 600dpi sensor.

- LM9831

+4.75V to +5.25V

+2.85 to +5.25V

134mA

- LM9831 DRAM I/O

• Typical Operating Current Consumption

•

Provides 50-2400dpi vertical resolution in 1 dpi increments.

Pixel rate error correction for gain (shading) and offset errors.

Supports 4 or 16Mbit external DRAMs.

Multiple CCD clocking rates allows matching of CCD clock to

scan resolution and pixel depth for maximum scan speed.

LM9831 Scanner System Block Diagram

+24V

USB

Port

Optional Serial

EEPROM

Stepper

Motor

MISC

I/O

1-3

2-6

CCD/CIS

Power

Transistors

LM9831CCVJD

Illumination

DRAM

1-3

48MHz Crystal

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

www.national.com

12 3 4 5 6 7...41

中文翻译

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与LM9831CCVJDX相关器件

型号	品牌	获取价格	描述	数据表
LM9832	NSC	获取价格	LM9832 42-Bit Color, 1200dpi USB Image Scanner
LM9832CCVJD	NSC	获取价格	LM9832 42-Bit Color, 1200dpi USB Image Scanner
LM9833	NSC	获取价格	LM9833 48-Bit Color, 1200dpi USB Image Scanner
LM9833CCVJD	NSC	获取价格	LM9833 48-Bit Color, 1200dpi USB Image Scanner
LM9833CCVJD/NOPB	NSC	获取价格	IC SPECIALTY CONSUMER CIRCUIT, PQFP100, PLASTIC, TQFP-100, Consumer IC:Other
LM98501	NSC	获取价格	10-Bit, 27 MSPS Camera Signal Processor
LM98501CCVBH	NSC	获取价格	10-Bit, 27 MSPS Camera Signal Processor
LM98503	NSC	获取价格	10-Bit, 18 MSPS Camera Signal Processor
LM98503CCVV	NSC	获取价格	10-Bit, 18 MSPS Camera Signal Processor
LM98519	NSC	获取价格	10-bit 65 MSPS 6 Channel Imaging Signal Processor

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