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Temperature sensing for sub-micron CPUs

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article image Dual remote-diode temperature sensor with ±0.75ºC accuracy.

NATIONAL Semiconductor, represented in Australia by Arrow Electronics , has released TruTherm thermal management technology for chips with integrated thermal diodes. 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 accurate temperature reading, National's TruTherm technology enables designers to achieve higher levels of performance, extend system life and reduce acoustic noise. Applications include systems using central processing unit and graphics processors, field-programmable gate arrays and other integrated circuits.

The LM95231 is the first sensor to use the technology. It is a dual remote-diode temperature sensor with ±0.75ºC accuracy. It has a precision sigma-delta analogue-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.

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