STTS22H - High Accuracy Temperature Sensor with Low Operating and Standby Current
The STMicroelectronics introduced STTS22H, a temperature sensor that can read with an accuracy of 0.25°C with low operating and standby current. The STTS22H is I2C and SMBus 3.0 compliant, it supports flexible operating mode, including configurable output data rate (ODR) down to 1Hz, a power-saving one-shot mode, and an interrupt pin that supports SMBus Alert Response Address (ARA). This allows the sensor to operate as an SMBus slave and to signal the application if a user-programmed upper or a lower temperature threshold is exceeded. Programmable I²C/SMBus slave addresses allow up to two STTS22H sensors to share the same bus.
Features of STTS22H Temperature Sensor:
- Factory calibrated and One-shot mode for power saving
- Supply voltage: 1.5 to 3.6 V
- Programmable thresholds with interrupt pin
- Supports up to 1 MHz serial clock
- Up to 2 I²C/SMBus slave addresses
- Very low power consumption of 2.0µA at 1Hz ODR
- Ultra-low current: 1.75 µA in one-shot mode
- Operating temperature -40 °C to +125 °C
- Temperature accuracy (max.): ± 0.5 °C (-10 °C to +60 °C)
- 16-bit temperature data output
The low power consumption of STTS2H helps to extend the running time of battery-powered devices. The device only draws a mere 0.5 µA in the standby mode with serial port inactive. The sensor is fast-acting with the conversion time of 5ms and provides 16-bit temperature data. The package is designed with a metal slug that helps in reducing the thermal resistance to ensure fast settling at the ambient temperature.
The STTS22H enhances temperature and heat flow monitoring in asset trackers, shipping-container loggers, HVAC systems, air humidifiers, refrigerators, building-automation systems, and smart consumer devices. The STTS22H is in production now as a compact and low-profile 2.0mm x 2.0mm x 0.5mm 6-lead UDFN, priced at $0.49 for orders of 1000 pieces. For more details about STTS22H visit the product page on the official website of STMicroelectronics.