AS6221 Digital Temperature Sensor

ams OSRAM's AS6221 is a high-accuracy digital temperature sensor with an accuracy of up to ±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 requiring no calibration or linearization. It provides measurement outputs via a standard I²C interface. The sensor supports any of eight I²C addresses avoiding bus conflicts in multi-sensor use cases. The ultra-small size of the sensor (WLCSP 1.5 mm x 1.0 mm) enables accurate body/skin temperature measurements in very small health and lifestyle monitoring products. In addition to the high accuracy and the small form factor, the AS6221 offers very low power consumption, for example measuring with four samples/s, the current consumption is only 6 µA. The sensor has four different automatic acquisition modes. It maintains high accuracy over the full supply range from 1.71 V to 3.6 V. An integrated alert functionality triggers an interrupt to the microcontroller when a temperature threshold is exceeded. The temperature threshold for the alert function can be adjusted in a device register.