LM9831

LM9831 42-Bit Color 1200dpi USB Image Scanner October 1999 N LM9831 42-Bit Color, 1200dpi USB Image Scanner General Description The LM9831 is a complete USB image scanner system on a single IC. The LM9831 provides all the functions (image sensor control, illumination control, analog front end, pixel processing function image data buffer/DRAM controller, microstepping motor controller, and USB interface) necessary to create a high performance color scanner. The LM9831 scans images in 42 bit color/14 bit gray, and has output data formats for 24 bit color/8 bit gray. The LM9831 supports sensors with pixel counts of up to 16384 pixels x 3 colors (1200 dpi x 13.6 inches). The LM9831’s low operating and suspend mode supply currents allow design of USB bus-powered scanners. The only additional active components required are an external 4Mbit or 16Mbit DRAM for data buffering and power transistors for the stepper motor. Applications Color Flatbed Document Scanners Color Sheetfed ...