STMicroelectronics STTS22H temperature sensor

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With typical temperature-reading accuracy of 0.25°C and low operating and standby current, the STMicroelectronics STTS22H is designed to enhance temperature and heat-flow monitoring in asset trackers, shipping-container loggers, HVAC systems, air humidifiers, refrigerators, building-automation systems and smart consumer devices.

The device is I²C and SMBus 3.0 compliant, and supports flexible operating modes including configurable output data rate (ODR) down to 1 Hz, a power-saving one-shot mode and an interrupt pin that supports SMBus Alert Response Address (ARA). This allows the sensor, as an SMBus slave, to signal the application if a user-programmed upper or lower temperature threshold is exceeded. Programmable I²C/SMBus slave addresses allow up to two sensors to share the same bus.

Power consumption is low, drawing just 2 µA at 1 Hz ODR and 1.75 µA during periodic one-shot measurements, helping extend the running time of battery-powered devices. In standby mode with the serial port inactive, the device draws 0.5 µA (typical). The 1.5–3.6 V operating-voltage range allows use with various power sources such as a small lithium cell.

The sensor is fast-acting, with conversion time of 5 ms, and provides 16-bit temperature data. The package features a metal slug that minimises thermal resistance to ensure fast settling at the ambient temperature. Devices come factory-calibrated and maintain the 0.25°C typical accuracy from -10 to +60°C, eliminating any need for user calibration.

The product comes in a compact (2 x 2 x 0.5 mm), low-profile, 6-lead UDFN package.

For more information: www.st.com/stts22hh-pr.