LM9801 Datasheet | National Semiconductor

LM9801 8-Bit Greyscale 24-Bit Color Linear CCD Sensor Processor June 1996 LM9801 8-Bit Greyscale 24-Bit Color Linear CCD Sensor Processor General Description The LM9801 is a high performance integrated signal processor digitizer for linear CCD image scanners The LM9801 performs all the analog processing (correlated double sampling for black level and offset pensation pixel-by-pixel gain (shading) correction and 8-bit analog-to-digital conversion) necessary to maximize the performance of a wide range of linear CCD sensors The LM9801 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 LM9801 can be used with parallel output color CCDs A signal inversion mode eases use with CIS sensors For plementary voltage reference see the LM4041 Applications Y Color and Greyscale Flatbed and Sheetfed Scanners Y Fax and Multifunction Peripherals Y Digital Copiers Y General Purpose Linear CCD Imaging Features Y 2 5 Million pixels s conversion rate Y Pixel-rate shading correction for individual pixels maxi- mizes dynamic range and resolution even on ‘‘weak’’ pixels Y Implements Correlated Double Sampling for minimum noise and offset error Y Reference and signal sampling points digitally controlled in 25 ns increments for maximum performance Y Generates all necessary CCD clock signals Y patible with a wide range of linear CCDs Y Supports some Contact Image Sensors (CIS) Y TTL CMOS input output patible Key Specifications Y Resolution 8 Bits Y Pixel Conversion Rate 2 5 MHz Y Supply Voltage a5V g 5% Y Supply Voltage (Digital I O) a3 3V g 10% or a5V g 5% Y Power Dissipation 230 m W (max) Connection Diagrams TL H 12814 - 1 Ordering Information mercial (0 C s TA s a70 C) LM9801CCV LM9801CCVF Package V52A 52-Pin Plastic Leaded Chip Carrier VEG52A 52-Pin Thin Quad Flatpack TL H...