Temp-to-voltage converter measures accurately

Temp-to-voltage converter measures accurately

The LTC2997 temperature-to-voltage converter with built-in series resistance cancellation 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. 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.

Features include a 2.5 to 5.5-V supply voltage, 1.8-V reference voltage output, 3.5-ms VPTAT update time, and 4-mV/°C output gain. Housed in a 6-pin DFN package, the part offers a quiescent current of 170 µA. The device targets a variety of applications, including system thermal control, energy harvesting, computers, network servers, and environmental monitoring. (From $1.45 ea/1,000 — available now.)

By Christina Nickolas

Linear Technology , Milpitas , CA
Sales Office 408-428-2050
www.linear.com