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SMSC unveils advanced temperature sensors

Posted: 03 Jan 2007 ?? ?Print Version ?Bookmark and Share

Keywords:sensors? temperature sensor? heat management? SMSC? thermal protection?

To meet the thermal management requirements of today's high-performance mobile electronics, PC and embedded applications, SMSC has unveiled two distinct families of advanced temperature sensorsthe EMC1402, 1403 and 1404 series and the EMC1422, 1423 and 1424 seriesthat address the CPU and up to three remote temperature measurements, including graphic processors, DIMM and wireless cards.

"With the launch of these six new temperature sensors, engineers designing for high-end platforms targeting 90nm and below now have a full-featured solution that delivers flexibility, performance and accuracy for temperature control," said Mark Beadle, product line director of analog products & technology at SMSC.

SMSC brings to market three key technologiesAuto Beta Compensation, Resistance Error Correction and Anti-parallel Diodesall of which are said to save system characterization and engineering time, speeding product time-to-market.

Design flexibility
Providing designers with the benefits of SMSC's thermal management technology, Auto Beta Compensation dispenses with the common software configuration for different remote diodes. This technology enables design flexibility and eliminates configuration for many processor types.

A common source of temperature measurement errors is the series resistance in processor diodes and board traces. This resistance can cause errors of up to 4Cunacceptable in today's design environments. Leveraging SMSC's Resistance Error Correction technology, this error is avoided, eliminating time-consuming system characterization.

Using SMSC's Anti-parallel Diodes, designers can minimize the board traces required to connect remote diode transistors for temperature measurement. This eases the task of routing in compact designs such as laptop computers. The Anti-parallel Diodes also allow for a population of one or two remote diodes for variations in design on the same board.

Two product lines
SMSC offers two differentiated temperature sensor product lines for high-performance thermal protection. While the EMC1402, 1403, and 1404 devices are temperature sensors with interrupt capability, the EMC1422, 1423 and 1424 offer the added benefit of system shutdown. This gives designers the ability to ensure proper shutdown temperature at start-up, at a point between 77C and 112C, which is adjustable without software. This shutdown integrates the value of temperature switches often used to respond to critical thermal events. By using the technology of Resistance Error Correction and Auto Beta Compensation, all of these devices reduce the need for a temperature offset register to fine tune measurement accuracy. This saves days of engineering time normally spent characterizing a system.

Samples of the EMC1400 family of temperature sensor devices are available today with production quantities coming in Q1 2007. The price range will be 60 cents to $1 per unit in OEM quantities.

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