Burr-Brown Extends Single-Chip Touch Screen Solutions with 5-Wire Touch Screen Controller.

TUCSON, Ariz.--(BUSINESS WIRE)--Feb. 2, 1999--Burr-Brown Corporation (NASDAQ:BBRC) today announced the ADS7845, the industry's only complete, single-chip, 12-bit analog-to-digital converter (ADC) solution available for 5-wire resistive touch screen applications that has all the "touch screen interface" features--including drivers--on one chip.

The ADS7845 offers improved performance, lower power consumption, and lower cost over all existing solutions. Its features make it ideal for battery operated and portable applications such as PDA (Personal Data Assistant) calculators, touch screen monitors, touch screen white boards, and other applications that utilize a resistive touch screen element.

In these applications, the ADS7845 measures a change in resistance as the screen is touched. The resistive change is then used to determine the exact location of contact upon a touch screen device.

"The ADS7845 is an obvious solution for customers struggling to build their own controller with a 12-bit ADC, drivers, control logic, and the screen 'turn-on' function," said Skip Osgood, product marketing manager at Burr-Brown. "In addition to simplifying circuit complexity, this device reduces error and provides higher resolution, thus enhancing touch screen reading accuracy."

Osgood added: "As a companion component to the previously introduced ADS7843 4-wire touch screen controller, the ADS7845 strengthens our leadership in complete, single-chip touch screen solutions."

The ADS7845 offers precision performance (compared to microprocessors with only 8-bit ADCs on-board), easy SPI/SSI serial interface, low power (<0.6mW at 75kHz data rate), and "touch interrupt" to alert the processor that operation has begun. It can also operate in a sense mode (ratiometric) to minimize gain and offset errors due to driver offset, power supply, temperature, and touch impedance variations. The device is guaranteed to operate down to 2.7V.

The ADS7845 is priced from $4.97 in 1,000 piece quantities and packaged in a small 16-pin SSOP surface mount to accommodate the demands of space-sensitive applications. Delivery is from stock.

About Burr-Brown

Burr-Brown Corporation is a worldwide leader in the development, manufacturing and marketing of precision linear, data conversion and mixed signal integrated circuits. These products address applications in communications, industrial control, instrumentation, consumer electronics, and personal computer systems.

For product information, visit http://www.burr-brown.com/. For additional information, call Mike Pawlik at 800/548-6132 or e-mail [e-mail].