Digital temperature sensor includes low power consumption

8th March 2016

SENSIRION

Joe Bush

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Datasheet

Designed for a variety of applications, Sensirion has introduced a new digital temperature sensor – the STS3x. The new STS3x temperature sensor is based on the same chip as the SHT3x humidity sensors and comes in a tiny eight-pin DFN package measuring only 2.5 × 2.5mm2 with a height of 0.9mm. The sensor delivers accuracy of +/-0.3°C over an extensive temperature range combined with low power consumption - an especially important consideration for battery operated devices.

The CMOSens technology is the basis of the STS3x sensor, offering increased intelligence, reliability and improved accuracy compared to its predecessors. Furthermore, the sensor demonstrates a fast start-up and response time, and its functionality includes enhanced signal processing, two user selectable I2C addresses and communication speeds of up to 1MHz. The STS3x temperature sensor is calibrated to provide a linearised, digital output that is compensated for supply voltage instabilities. Qualification is based on JESD 47, with a dedicated automotive qualification plan certified according to AEC Q100. The alert option with definable temperature set points enables using the sensor as a watchdog and can thus optimise overall power consumption.

The STS3x sensor is well suited for demanding data logger and temperature compensation applications. Due to its high accuracy, body temperature measurement in wearable devices and temperature calibration in automotive components are among the main target applications. In addition, a multitude of HVAC devices will benefit in terms of precision, power savings and reliability when accounting for highly accurate temperature data.