High accurate digital temperature sensor


  • High temperature accuracy of ±0.09 °C (20...42 °C)
  • Ultra-low-power consumption: 6 µA at 4 SPS (typ.) and 0.1 μA in standby (typ.)
  • Small form factor WLCSP package: total size 1.5 × 1.0 mm
  • No calibration or linearization required

The AS6221 is a highly accurate digital temperature sensor with an accuracy of 0.09 °C, which is ideal for healthcare applications, wearables, and devices requiring high-performance thermal information.

The AS6221 is a complete digital sensor system, requires no calibration or linearization. The ultra-small size of the sensor (WLCSP 1.5 x 1.0 mm) enables accurate body/skin temperature measurements in health and lifestyle monitoring products. In addition to the high accuracy and the small form factor, the AS6221 offers very low power consumption, e.g., measuring with 4 samples per second (SPS), the current consumption is only 6 μA.


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  • A fully-digital system with up to eight I²C addresses
  • Programmable Alert OUT pin:
    • No need to constantly poll the sensor
  • Best-in-class accuracy
  • Space-saving with ultra-small integration size
  • Superior power efficiency for better battery endurance
  • Easy-to-use solution for fast go-to-market
  • Enables multi-device application development
  • Easy to integrate with a standard serial bus connection
  • Alert functionality for advanced system power reduction
  • Medical – temperature sensing on skin
  • Wearables
  • Mobile Health
  • Fitness trackers and bands
  • Electronic devices
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