Linear Technology's new high-accuracy temperature monitor provides adjustable alerts

Linear Technology has introduced the LTC2996 high-accuracy temperature sensor for 2.25 to 5.5 V 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 PTAT (proportional-to-absolute-temperature) output voltage, and individual under-temperature and over-temperature alert outputs, defined by user-adjustable thresholds. No code is required to configure the device. With a 200 μA quiescent current, the LTC2996 simply provides a precise, space-saving, micropower temperature monitor. The LTC2996's accuracy, configurability, and code-free operation 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 3.5 ms to provide systems with sufficient time to react to alerts. The device includes a 1.8 V voltage reference output to share with an external ADC or for generating temperature threshold voltages. The LTC2996 is offered in commercial, industrial, and automotive versions, supporting operating temperature ranges from 0 to 70 °C, -40 to 85°C, and -40 to 125°C, respectively. The LTC2996 is available today in a RoHS compliant, 3 x 3 mm, 10-pin DFN package. Pricing starts at 1.95 (1000). Summary of LTC2996 features

• Converts remote or internal diode temperature to analog voltage
• Adjustable over-temperature & under-temperature thresholds
• ±1 °C remote temperature accuracy
• ±2 °C internal temperature accuracy
• Built-In series resistance cancellation
• Open-drain alert outputs
• 2.25 to 5.5 V supply voltage
• 1.8 V reference voltage output
• 200 μA quiescent current
• 3 × 3 mm 10-Pin DFN package