SHTW2

Data Sheet SHTW2 WLCSP Humidity and Temperature Sensor IC       Ultra-small flip chip package: 1.3 × 0.7 × 0.5 mm3 Fully calibrated and reflow solderable Ultra-low power consumption Power-up and measurement within 1 ms 1.8 V supply voltage Typical accuracy: ±3 %RH and ±0.4 °C Product Summary The SHTW2 is a digital humidity and temperature sensor in a flip chip package. This type of package opens up a new category of ultra-small humidity sensors which are suitable for applications with the tightest space constraints. At the same time, the flip chip package impresses with its pure simplicity. The sensor is based on Sensirion’s CMOSens® technology, which offers a complete sensor system on a single chip, consisting of a capacitive humidity sensor, a bandgap temperature sensor, analog and digital signal processing, A/D converter, calibration data memory, and a digital communication interface supporting I2C fast mode. Block diagram Benefits of Sensirion’s CMOSens® Technology      The sensor covers a humidity measurement range of 0 to 100 %RH and a temperature measurement range of -30 to 100 °C with a typical accuracy of ±3 %RH and ±0.4°C. The operation voltage of 1.8 V and the low power consumption make the SHTW2 suitable for mobile or wireless applications running on the tightest power budgets. With the industry-proven quality and reliability of Sensirion’s humidity and temperature sensors and constant accuracy over a large measurement range, the SHTW2 offers an unprecedented performance-to-price ratio. Tape and reel packaging together with suitability for standard SMD assembly processes make the SHTW2 predestined for high-volume applications. High reliability and long-term stability Industry-proven technology with a track record of more than 10 years Designed for mass production Optimized for lowest cost Best signal-to-noise ratio RH sensor T sensor Signal conditioning Signal conditioning analog ADC digital Contents of this Data Sheet 1 Humidity and Temperature Sensor Specifications ... 2 2 Electrical Specifications ........................................... 3 3 Timing Specifications ............................................... 4 4 Interface Specifications ............................................ 5 5 Operation and Communication ................................ 6 6 Quality ...................................................................... 9 7 Package and Traceability ......................................... 9 8 Technical Drawings................................................ 10 9 Further Information ................................................ 12 Important Notices............................................................ 14 www.sensirion.com Data processing and system control Calibration mem. VDD VSS I2C interface SDA SCL Figure 1 Functional block diagram of the SHTW2. Version 1 – May 2016 1/14 1 Humidity and Temperature Sensor Specifications Relative Humidity Temperature Parameter Accuracy tolerance1 Conditions Value Units Typ. 3.0 see Figure 2 0.1 0.01 %RH 1 0 to 100 %RH Resolution3 Specified range4 %RH Response time8 Resolution3 Max. - Hysteresis - Repeatability2 Specified range4 Response extended5  63% Typ. time6 Long-term drift7 %RH %RH %RH 8 s