Linear Technology LTC2997 temperature-to-voltage converter

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Linear Technology has introduced the LTC2997, a temperature-to-voltage converter with built-in series resistance cancellation for 2.5 to 5.5 V systems.

It is a simple temperature monitoring solution that measures a remote diode’s temperature with ±1°C accuracy or local temperature with ±1.5°C accuracy, and outputs a voltage proportional to absolute temperature. The device provides a precise, space-saving, micropower temperature monitoring solution.

Its simplicity, accuracy and micropower consumption caters to a wide variety of applications, including system thermal control, energy harvesting, desktop and notebook computers, network servers and environmental monitoring. Two current sense inputs can be configured to measure either local or remote temperature.

A built-in algorithm cancels the errors due to sensor series resistance when measuring a diode or transistor voltages. A 1.8 voltage reference output is also available to share with an external ADC or for generating temperature threshold voltages to compare against the VPTAT output.

The converter is offered in commercial, industrial and motor vehicle versions, supporting operating temperature ranges from 0 to 70°C, -40 to 85°C and -40 to 125°C.