SHTW1 XPLAINED PRO EXTENSION BOARD

Data Sheet SHTW1 WLCSP Humidity and Temperature Sensor IC       Ultra-small WLCSP: 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 SHTW1 is a digital humidity and temperature sensor in a wafer-level chip-scale package (WLCSP). This type of package opens up a new category of ultra-small humidity sensors which are suitable for applications with the tightest space constraints. The SHTW1 is designed especially for high-volume consumer electronics applications. 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 SHTW1 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 SHTW1 offers an unprecedented performance-to-price ratio. Tape and reel packaging together with suitability for standard SMD assembly processes make the SHTW1 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 2 3 4 5 6 7 8 9 10 Humidity and Temperature Sensor Specifications ............ 2 Electrical Specifications .................................................... 3 Timing Specifications ........................................................ 4 Interface Specifications ..................................................... 5 Operation and Communication ......................................... 6 Quality ............................................................................... 9 Packaging and Traceability ............................................... 9 Ordering Information ......................................................... 9 Technical Drawings ......................................................... 10 Further Information.......................................................... 12 www.sensirion.com Data processing and system control Calibration mem. VDD VSS I2C interface SDA SCL Figure 1 Functional block diagram of the SHTW1. Version 1 – January 2015 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