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Features
1.5 Million pixels/s conversion rate
Pixel-rate shading correction for individual pixels maximizes dynamic range and resolution, even on "weak" pixels
Implements Correlated Double Sampling for minimum noise and offset error
Reference and signal sampling points digitally controlled in 40ns increments for maximum performance
Generates all necessary CCD clock signals
Compatible with a wide range of linear CCDs
Supports some Contact Image Sensors (CIS)
TTL/CMOS input/output compatible
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 performance 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 internal configuration register sets CCD and sampling timing to maximize performance, simplifying the design and manufacturing 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
Color and Greyscale Flatbed and Sheetfed Scanners
Fax and Multifunction Peripherals
Digital Copiers
General Purpose Linear CCD Imaging
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