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LM9811 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM9811 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 36 page  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. Applications n Color and Greyscale Flatbed and Sheetfed Scanners n Fax and Multifunction Peripherals n Digital Copiers n General Purpose Linear CCD Imaging Features n 1.5 Million pixels/s conversion rate n Pixel-rate shading correction for individual pixels maximizes dynamic range and resolution, even on “weak” 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: 10 Bits n Pixel Conversion Rate: 1.5MHz n Supply Voltage: +5V ± 5% n Supply Voltage (Digital I/O): +3.3V ± 10% or +5V ± 5% n Power Dissipation: 260mW (max) Connection Diagrams TRI-STATE® is a registered trademark of National Semiconductor Corporation. MICROWIRE™ is a trademark of National Semiconductor Corporation. SPI™ is a trademark of Motorola, Inc. DS012813-1 DS012813-2 April 1998 © 1999 National Semiconductor Corporation DS012813 www.national.com |
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