DIGITAL TEMPERATURE SENSOR FROM DALLAS SEMICONDUCTOR LOWEST COST IN ITS ACCURACY GRADE
DALLAS, TX-December 7, 1998-Dallas Semiconductor today announced the DS1721 2-Wire Digital Thermometer and Thermostat, the latest in its growing family of digital temperature sensors. The DS1721 reports the temperature of a device or environment with an accuracy of ±1°C over a very wide temperature range: -10°C to +85°C.
 Michael Overlaur, product manager, said, "The ±1°C is a maximum value, not a typical value as is often spec'd by other manufacturers. While there are similar devices that offer 2°C accuracy, few devices offer 1°C, and none at the DS1721's low cost. Accuracy is maintained over the full supply voltage range of 2.7V to 5.5V."
Broadening the temperature range, the DS1721 can provide accuracy of ±2.0°C from -55°C to +125°C. The device can be used as a thermostat as well as a thermometer: the user sets high and low temperature limits, and the device reports when these limits have been reached. The temperature is reported in a 9- to 12-bit word, with increments as small as 0.0625°C.
Overlaur said, "Other manufacturers' temperature sensing devices offer up to 10 bits of resolution only. With 12 bits, however, the DS1721 can detect problematic temperature changes sooner, enhancing system safety."
The device's three address lines can be used to multi-drop up to eight DS1721s along the 2-wire bus, greatly simplifying the busing of distributed temperature sensing networks.
Applications for the DS1721 include personal computers, hard disk drives, office equipment, medical/scientific equipment, and any thermally sensitive system.
Currently available from stock, the DS1721 2-Wire Digital Thermometer and Thermostat costs $0.99 in 10,000-piece quantities.
Dallas Semiconductor designs, manufactures and markets CMOS chips and chip-based subsystems. In its 14-year history, the company has sold its products to more than 15,000 customers worldwide. Major markets include Original Equipment Manufacturers (OEMs) in personal computers, telecommunications, office equipment, instrumentation, factory automation, medical equipment and mainframe computers. The company's Web site address is http://www.maxim-ic.com.
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