Part # LM9833 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM9833 48-Bit Color, 1200dpi USB Image Scanner

Part Details:

LM9833 October 2001 LM9833 48-Bit Color, 1200dpi USB Image Scanner 48- General Description Features B The LM9833 is a complete USB image scanner system on a sin- · 16 bit ADC digitizes at up to 6Mpixels/s (2M RGB pixels/sec). it Co gle IC. The LM9833 provides all the functions (image sensor · Digital Pixel Processing provides 1200, 800, 600, 400, 300, control, illumination control, analog front end, pixel processing 200, 150, and 100dpi horizontal resolution from a 1200dpi function image data buffer/DRAM controller, microstepping sensor and 600, 400, 300, 200, 150, 100, 75, and 50dpi l motor controller, and USB interface) necessary to create a high horizontal resolution from a 600dpi sensor. or 1200 performance color scanner. The LM9833 scans images in 48 bit · Provides 50-2400dpi vertical resolution in 1 dpi increments. color/16 bit gray, and has output data formats for 48 and 24bit · Pixel rate error correction for gain (shading) and offset errors. color/16 and 8 bit gray. The LM9833 supports sensors with pixel · Supports 4 or 16Mbit external DRAMs. counts of up to 16384 pixels x 3 colors (1200 dpi x 13.6 inches). · Multiple CCD clocking rates allows matching of CCD clock to scan resolution and pixel depth for maximum scan speed. The LM9833 s low operating and suspend mode supply currents d · Stepper motor control tightly coupled with image data buffer allow design of USB bus-powered scanners. The only additional p management to maximize data transfer efficiency. active components required are an external 4Mbit or 16Mbit i · PWM stepper motor current control allows microstepping for USB Im DRAM for data buffering and power transistors for the stepper the price of ful stepping. motor. · USB interface for Plug and Play operation on USB-equipped Applications computers. · Color Flatbed Document Scanners · Serial EEPROM option for custom Vendor and Product IDs. · Color Sheetfed Document Scanners · Support for USB bus-powered operation.· Pixel depths of 1, 2, or 4 bits are packed into bytes for faster age Key Specifications scans of line art and low pixel depth images. · Analog to Digital Converter Resolution 16 Bits

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LM9833.pdf Datasheet