LM9811 Datasheet | National Semiconductor

LM9811 10-Bit Greyscale/30-Bit Color Linear CCD Sensor Processor April 1998 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 pensation, 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 plementary voltage reference see the LM4041. 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 patible with a wide range of linear CCDs n Supports some Contact Image Sensors (CIS) n TTL/CMOS input/output patible Key Specifications n Resolution: n Pixel Conversion Rate: n Supply Voltage: n Supply Voltage (Digital I/O): n Power Dissipation: 10 Bits 1.5MHz +5V ± 5% +3.3V ± 10% or +5V ± 5% 260m W (max) Applications n n n n Color and Greyscale Flatbed and Sheetfed Scanners Fax and Multifunction Peripherals Digital Copiers General Purpose Linear CCD Imaging Connection Diagrams DS012813-1 DS012813-2 TRI-STATE ® is a registered trademark of National Semiconductor Corporation. MICROWIRE™ is a trademark of National Semiconductor Corporation. SPI™...