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Measure temperature without external sensing components

Dallas — A single-wire digital output temperature sensor from Texas Instruments Inc. (TI) is said to render high accuracy in a tiny package.

The 10-bit resolution sensor operates over a wide temperature range of -40°C to +125°C with typical accuracy of 0.25°C. It is capable of measuring temperatures within 2°C accuracy over a temperature range of -25°C to +85°C, and 3°C of accuracy over -40°C to +125°C, according to TI's data sheet.

Utilizing National Semiconductor's single-wire SensorPath interface protocol, the sensor, which features an extended supply range of 2.7 V to 5.5 V, can measure temperature without any external sensing components. The single-wire protocol of the sensor makes it immune to system-generated noise and the micro-size SOT23 package allows easier placement and routing than most digital output temperature sensors currently found in high-performance computing, the company said.

Its small package size is a good fit for space restricted applications. Also, the device's low operating current of 170 μA (max) makes it suited for supervisory systems in servers and personal computers.

In addition to monitoring hardware systems in servers and personal computers, the device can also be used for industrial electronics, temperature measurement, battery-powered instruments and test equipment applications. It also offers a viable solution for applications with limited wiring restrictions.


The TMP141 is available now in SOT23-6 and MSOP-8 packages. Suggested retail pricing is 65 cents each in 1,000-piece quantities. Click here for the TMP141 data sheet.

Texas Instruments , 1-800-477-8924, www.TI.com.

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