Product category:
Sensors and Data Acquisition
News Release from: STMicroelectronics | Subject: STxx75 temperature sensors
Edited by the Electronicstalk Editorial
Team on 30 January 2008
Temperature sensors suit low-power
applications
STxx75 temperature sensors suit any control application where a processor with an I2C bus/SMBus needs to take action based on an accurate digital reading of the local temperature
STMicroelectronics has released a new series of precision digital-output temperature sensors, operating over the -55 to +125C temperature range, which are suitable for low-power applications in a broad range of product areas The cost-competitive STxx75 devices are software-compatible drop-in replacements for industry-standard LM75, DS75 and TCN75A parts and also complement ST's STLM20 analogue temperature sensor, now being used in several mobile phone designs
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
Related stories
Driver drives LED efficiency
STMicroelectronics has introduced a new white LED driver with specific features for small LCD module backlight and high efficiency white LED power supply for portable applications.
Single-chip tuner cuts set-top box parts count
The STB6000 single-chip silicon tuner is designed to replace complex discrete component tuners in set-top boxes used for receiving digital TV or web-based material via satellite.
The digital sensors, in standard eight-lead TSSOP and SO-8 packages, are intended for use in any control application where a processor with an I2C bus/SMBus needs to take action based on an accurate digital reading of the local temperature, or where an alarm or interrupt is required when a preset temperature level is reached.
They use a band-gap temperature sensor, with a programmable 9bit to 12bit sigma-delta ADC (analogue to digital convertor) to digitise the temperature reading to a resolution of up to 0.0625C.
The STTS75 devices are factory-calibrated and require no external components.
Accuracy is +/-3C over the full -55 to +125C temperature range and +/-2C from -25 to +100C.
The sensors are designed for a supply voltage range of 2.7 to 5.5V and have a low operating current of 75uA (typical) at 3.3V.
In the power-saving shutdown mode the standby current is 1uA maximum.
Power-up defaults enable standalone operation as a thermostat and both temperature and hysteresis values are programmable.
Typical applications include any product with a hard drive, including laptops, servers and some set top boxes, plus medical equipment, industrial controllers and LCD backlighting.
Brighter displays and higher speed circuits mean more heat is being generated, which must be dissipated in ever-smaller packages.
This challenge for thermal management in consumer and industrial electronics means that the temperature of ICs and ambient air must be carefully monitored to prevent over-heating and damage.
• STMicroelectronics: contact details and other news
• Email this article to a colleague
• Register for the free Electronicstalk email newsletter
• Electronicstalk Home Page
Search the Pro-Talk network of sites
