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TI Introduces Industry's First Touch Screen Controller With I2C Interface For Portable Handheld Computing
URL(s): www.ti.com
TUCSON, Ariz., Nov 2, 2001 - Extending its leadership position in precision touch screen interface solutions, Texas Instruments (NYSE: TXN) (TI)
today introduced the industry's first touch screen controller with I2C interface from the company's Burr-Brown product line. The new device is a complete four-wire resistive touch
screen interface circuit with on-chip 12-bit analog-to-digital converter (ADC) designed specifically for touch screen devices such as personal digital assistants (PDAs), "smart"
phones, Internet appliances, monitors, point-of-sale terminals, PC tablets and pagers. See http://www.ti.com/sc/aap7087u .
The TSC2003 offers increased functionality, improved performance, and lower cost over existing solutions. The device features an on-chip 2.5V reference, direct monitoring of two
batteries, temperature sensing, two auxiliary analog inputs and touch-pressure measurement. The internal reference will operate down to 2.7V supply voltage while monitoring the
battery voltage from 0.5V to 6V. The reference can be powered down when not in use to conserve power.
"The combination of an I2C interface with such a high level of functionality on a single chip simplifies processor interface, enhances circuit design and improves system accuracy
in demanding touch screen devices," said Skip Osgood, marketing manager for TI's Data Acquisition products. "Furthermore, the TSC2003 extends TI's industry-leading portfolio
of low-cost, single-chip touch screen controllers."
The TSC2003 supports all three industry-standard I2C serial bus and data transmission protocols: standard (up to 100kbps), fast (up to 400kbps) and high-speed (up to
3.4Mbps). The I2C control bus simplifies circuit design and maximizes hardware efficiency in modern electronic systems where a number of peripheral ICs communicate with the
processor over a single serial port.
The TSC2003 features low power operation (1.8mW max), precision performance (compared to microprocessors with only 8- or 10-bit ADCs on board) and touch interrupt to alert
the processor that operation has begun. It can also be operated in a patented sense mode (ratiometric) to eliminate gain and offset errors caused by driver, power supply,
temperature and touch impedance variations.
Available Today
The TSC2003 is available now in a TSSOP-16 package. Suggested resale pricing starts at $2.30 in 1,000 piece quantities.
Texas Instruments Incorporated is the world leader in digital signal processing and analog technologies, the semiconductor engines of the Internet age. The company's
businesses also include sensors and controls, and educational and productivity solutions. TI is headquartered in Dallas, Texas, and has manufacturing or sales operations in
more than 25 countries.
Texas Instruments is traded on the New York Stock Exchange under the symbol TXN. More information is located on the World Wide Web at: http://www.ti.com
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