AS6221 Temperature Sensor
High accurate digital temperature sensor
Features
- High temperature accuracy
- Ultra-low power consumption
- Small integration size (WLCSP)
- Complete sensor system with serial bus connection
- Alert functionality for exact temperature control
Benefits
- Enables high accurate skin temperature measurements
- Long battery life and low self heating
- 'Easy to Use' solution, i.e. no calibration or linearization needed
- Minimal board space and fast reaction time
Product parameters
Interface | I²C |
---|---|
Supply Voltage [V] | 1.71 to 3.6 |
Consumption [µA] | 6 @ 4 samples/s |
Dimension [mm] | 1.5 x 1 |
Ambient Temp. Range [°C] | -40 to 125 |
Accuracy | ±0.09°C (20°C to 42°C) |
Conversion Time [ms] | 36 |
General Description
The AS6221 is a high accurate 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, requires no calibration or linearization. It provides measurement outputs via a standard I²C interface. The sensor supports 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 a very low power consumption, for example measuring with 4 samples/s, the current consumption is only 6 µA. The sensor has 4 different automatic acquisition modes and keeps the high accuracy over the full supply range from 1.71 to 3.6 V. An integrated alert functionality triggers an interrupt to the micro controller when a temperature threshold is exceeded. The temperature threshold for the alert function can be adjusted in a device register.

This product suits for the following applications:
- Mobile Health
- Wearables
- Fitness trackers and bands
- Electronic devices
- Laptops
- Tablets
- SSDs
- PTC replacement

Tools
Title | Category | Headline | Buy |
---|---|---|---|
AS6221 Eval Kit | Application Board | AS6221 Evaluation Kit | |
AS6221 Demo Kit | Application Board | AS6221 Demo Kit |
Resources
Type | Description | Language | ||
---|---|---|---|---|
Driver | AS62XX_Driver_pLinux_v2-0-0.zip Linux driver for ams AS62XX temperature sensor | EN |
Technical Documents
Type | Description | Language | ||
---|---|---|---|---|
Datasheet | Datasheet for AS6221 | English | ||
Application Note | Thermal Design Guideline for Wearables | English | ||
Application Note | Thermal design guideline for PCB reference design | English | ||
Product Brief | AS6221 features, benefits, applications | English |
Environmental Documents
Type | Description | Language | ||
---|---|---|---|---|
RoHS Certificate | AS6221 RoHS Certificate | English |
Other Information
Type | Description | Language | ||
---|---|---|---|---|
Block Diagram | AS6221 Block Diagram | English | ||
Factsheet | High Accuracy Digital Temperature Sensor | English | ||
Image | AS6221 WLCSP Picture | English |