High accuracy temperature monitor offers thermal control and energy harvesting
Published: 10 August 2012 - Michelle Winny
A high accuracy temperature sensor for has been released by Linear Technology Corporation for 2.25V to 5.5V systems. The LTC2996 measures a remote diode’s temperature with ±1°C accuracy and its own die temperature with ±2°C accuracy while rejecting errors due to noise and series resistance.
The device provides a voltage-proportional-to-absolute-temperature (VPTAT) output, as well as individual undertemperature and overtemperature alert outputs, defined by user-adjustable thresholds. No code is required to configure the device. With a 200µA quiescent current, the sensor provides a precise, space-saving, micropower temperature monitoring solution.
The device features accuracy, configurability and code-free operation that caters to a wide variety of applications, including system thermal control, energy harvesting, desktop and notebook computers, network servers and environmental monitoring. Users can choose to measure internal or remote temperature and easily adjust the temperature thresholds with resistive dividers.
Temperature conversions are updated every 3.5ms to provide systems with sufficient time to react to alerts. The device includes 1.8V voltage reference output to share with an external ADC or for generating temperature threshold voltages.
Commercial, industrial and automotive versions are available, supporting operating temperature ranges from 0°C to 70°C, -40°C to 85°C and -40°C to 125°C, respectively.
Linear Technology Corporation