National Revolutionizes Temperature Sensing for Sub-Micron CPUs

Feb 28, 2005

a breakthrough for thermal management accuracy, National Semiconductor Corporation announced TruTherm™ thermal management technology, which uses a new measuring technique to provide pinpoint-accurate temperature measurement for chips with integrated thermal diodes.

“Measuring the internal temperature of sub-micron CPUs and FPGAs with traditional methods generates results that are inaccurate and unpredictable,” said Suneil Parulekar, National Semiconductor’s senior vice president of the Analog Products Group. “To solve this problem, National’s new TruTherm technology relies on a new measuring technique to achieve an unmatched level of temperature reading accuracy.”

As computing systems and consumer electronics incorporate more sub-micron processors and FPGAs that tend to run hot, engineers need to design cooling fans into their systems to prevent overheating. By providing a pinpoint-accurate temperature reading, National’s TruTherm™ technology enables designers to achieve higher levels of performance, extend system life and reduce acoustic noise in systems using central processing units, graphics processors, field-programmable gate arrays and other integrated circuits developed in 90-nanometer and below processes.

"More accurate temperature readings allow designers to optimize system performance, protect the system processor and lower acoustic noise," said Benson Inkley, senior processor applications engineer of Intel Corporation. "To support TruTherm technology, Intel will include additional parameters in the datasheet for our new 90-nanometer Pentium 4 processors."

New LM95231 Sensor with TruTherm Technology
National is producing a family of new temperature sensors featuring TruTherm technology. The first member of this family, the LM95231, is a high-precision, dual remote-diode temperature sensor with plus or minus 0.75 degrees Celsius accuracy. It features a precision sigma-delta analog-to-digital converter for reduced sensitivity to noise and includes digital filtering, remote-diode fault detection and local temperature sensing. The LM95231 is compatible with the SMBus 2.0 and I2C bus specifications.

The LM95231 is designed on National’s proprietary, analog-optimized advanced CMOS process, manufactured at National’s wafer fabrication plant in South Portland, Maine, and tested and assembled at the company’s facility in Melaka, Malaysia.

National Presents at IDF
National Semiconductor's experts in thermal management design will introduce the TruTherm technology in a tutorial session at the Intel Developer’s Forum in San Francisco. The session, “Improve Acoustic Performance Using a New Processor Temperature Sensing Technique,” will be held from 3:30 p.m. to 4:20 p.m. on Thursday, March 3 at the Moscone Center.

Pricing and Availability
Limited samples of the LM95231 temperature sensor, packaged in an 8-pin MSOP, are available now. Production quantities will be available in May 2005 and priced at $1.50 in 1,000-unit quantities.

Explore further: Nintendo's trailblazing Game Boy marks 25th anniversary

add to favorites email to friend print save as pdf

Related Stories

Chimpanzees prefer firm, stable beds

58 minutes ago

Chimpanzees may select a certain type of wood, Ugandan Ironwood, over other options for its firm, stable, and resilient properties to make their bed, according to a study published April 16, 2014 in the open-access ...

IBM posts lower 1Q earnings amid hardware slump

1 hour ago

IBM's first-quarter earnings fell and revenue came in below Wall Street's expectations amid an ongoing decline in its hardware business, one that was exasperated by weaker demand in China and emerging markets.

Recommended for you

Hackers of Oman news agency target Bouteflika

2 hours ago

Hackers on Sunday targeted the website of Oman's official news agency, singling out and mocking Algeria's newly re-elected president Abdelaziz Bouteflika as a handicapped "dictator".

Ex-Apple chief plans mobile phone for India

20 hours ago

Former Apple chief executive John Sculley, whose marketing skills helped bring the personal computer to desktops worldwide, says he plans to launch a mobile phone in India to exploit its still largely untapped ...

Health care site flagged in Heartbleed review

Apr 19, 2014

People with accounts on the enrollment website for President Barack Obama's signature health care law are being told to change their passwords following an administration-wide review of the government's vulnerability to the ...

User comments : 0

More news stories

Hackers of Oman news agency target Bouteflika

Hackers on Sunday targeted the website of Oman's official news agency, singling out and mocking Algeria's newly re-elected president Abdelaziz Bouteflika as a handicapped "dictator".

Ex-Apple chief plans mobile phone for India

Former Apple chief executive John Sculley, whose marketing skills helped bring the personal computer to desktops worldwide, says he plans to launch a mobile phone in India to exploit its still largely untapped ...