Temperature sensor provides adjustable alerts
Test & Measurement World Staff - August 9, 2012
Intended for 2.25-V to 5.5-V systems, the LTC2996 temperature sensor from Linear Technology provides a voltage output proportional to temperature, as well as adjustable undertemperature and overtemperature thresholds and open-drain alert outputs. It measures a remote diode’s temperature, accurate to within ±1°C, and its own die temperature, accurate to within ±2°C, while rejecting errors due to noise and series resistance.
The device can be used in a wide variety of applications, including system thermal control, energy harvesting, desktop and notebook computers, network servers, and environmental monitoring. Engineers can choose to measure internal or remote temperature and adjust the temperature thresholds with resistive dividers. Temperature conversions are updated every 3.5 ms. The LTC2996 also includes a 1.8-V reference output to share with an external ADC or for generating temperature threshold voltages.
Housed in a 10-pin, 3x3-mm DFN package, the LTC2996 is offered in commercial, industrial, and automotive versions with operating temperature ranges of 0 to 70°C, –40°C to +85°C, and –40°C to +125°C, respectively. Prices start at $1.95 each in 1000-unit quantities.
Linear Technology, http://cds.linear.com/docs/Datasheet/2996f.pdf