A system-on-a-chip solution announced Monday by National Semiconductor, in Santa Clara, Calif., incorporates all the functions of a high-performance color scanner, including analog front
end, sensor-clock generation, micro-stepping motor control, data
buffering, and parallel-port interface.
"National's innovative, single-chip design sets a new standard in
price/performance for image and document scanners," said Bill Stacy,
vice president of National's System Products Group. "The LM9830
enables superior image quality and significantly higher speeds than the
multiple chips used in current scanners. It also shortens our customers'
time-to-market by minimizing their electronics and software design."
Using a 6-megahertz, 12-bit ADC with pipelined architecture,
National's LM9830 operates at a conversion rate of 6 million pixels
per second and scans images in full 36-bit color. The LM9830
incorporates digital offset and shading correction, as well as all the
analog-processing functions that National built into earlier imaging
products, such as gain offset and correlated double sampling.
The LM9830 is powered by a single 5-volt source and typically
dissipates just 350 milliwatts. It includes a low-power standby mode
for power-down capability.
Available now in a 100-lead thin-quad flat pack, the LM9830
is priced at $10 in 1,000-unit quantities.