The LTC2996 from Linear Technology Corp., Milpitas, CA, is a temperature sensor for 2.25–5.5 V systems that 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 has a 200 µA quiescent current, 1.8 V reference voltage output, and provides a voltage output proportional to absolute temperature (VPTAT) as well as individual undertemperature and overtemperature alert outputs, defined by user-adjustable thresholds. Applications include system thermal control, energy harvesting, desktop and notebook computers, network servers, and environmental monitoring. The device is available in commercial, industrial, and automotive versions.
Temperature Monitor from Linear Technology
Linear Technology Corp.