Datasheet SHTC1 Humidity and Temperature Sensor IC Best performance-to-price ratio Fully calibrated and reflow solderable Ultra-low power consumption Power-up and measurement within 1 ms 1.8 V supply voltage 3 Ultra-small DFN package: 2 2 0.75 mm Typical accuracy: 3 %RH and 0.3 C Product Summary The sensor covers a humidity measurement range of 0 to The SHTC1 is a digital humidity and temperature sensor 100 %RH and a temperature measurement range of 30 designed especially for high-volume consumer electronics applications. This sensor is strictly designed to overcome to 100 C with a typical accuracy of 3 %RH and 0.3C. The operation voltage of 1.8 V and an energy budget below conventional limits for size, power consumption, and 1 J per measurement make the SHTC1 suitable for performance to price ratio in order to fulfill current and mobile or wireless applications running on the tightest future requirements. Sensirions CMOSens technology power budgets. With the industry-proven quality and offers a complete sensor system on a single chip, reliability of Sensirions humidity and temperature sensors consisting of a capacitive humidity sensor, a bandgap and constant accuracy over a large measurement range, temperature sensor, analog and digital signal processing, the SHTC1 offers an unprecedented performance-to-price A/D converter, calibration data memory, and a digital 2 ratio. Tape and reel packaging together with suitability for communication interface supporting I C fast mode. The 3 standard SMD assembly processes make the SHTC1 ultra-small, 2 2 0.75 mm DFN package enables predestined for high-volume applications. applications in even the most limited of spaces. Benefits of Sensirions CMOSens Technology Block diagram High reliability and long-term stability Industry-proven technology with a track record of more than 10 years RH sensor T sensor Designed for mass production Optimized for lowest cost Signal conditioning Signal conditioning Low signal noise analog Contents of this Data Sheet ADC digital 1 Humidity and Temperature Sensor Specifications ............ 2 2 Electrical Specifications .................................................... 3 Data processing and system control 3 Timing Specifications ........................................................ 4 4 Interface Specifications ..................................................... 6 2 Calibration mem. I C interface 5 Operation and Communication ......................................... 6 6 Quality ............................................................................... 9 VDD VSS SDA SCL 7 Packaging and Traceability ............................................... 9 8 Ordering Information ......................................................... 9 9 Technical Drawings ......................................................... 10 Figure 1 Functional block diagram of the SHTC1. 10 Further Information.......................................................... 12 Important Notices...................................................................... 14 www.sensirion.com Version 4 August 2015 1/14 1 Humidity and Temperature Sensor Specifications Relative Humidity Temperature Parameter Conditions Value Units Parameter Conditions Value Units Typ. 3.0 %RH Typ. 0.3 C 1 1 Accuracy tolerance Accuracy tolerance Max. see Figure 2 %RH Max. see Figure 3 C 2 2 Repeatability - 0.1 %RH Repeatability - 0.1 C 3 3 Resolution - 0.01 %RH Resolution - 0.01 C 4 Specified range - 30 to +100 C Hysteresis - 1 %RH 4 5 8 Response time <5 to 30 s Specified range extended 0 to 100 %RH 63% 9 6 Response time 8 s Long-term drift Typ. <0.02 C/y 63% 7 Long-term drift Typ. <0.25 %RH/y Table 2 Temperature sensor specifications. Table 1 Humidity sensor specifications. T C RH %RH 2 10 Maximum Accuracy Maximum accuracy 8 Typical Accuracy Typical Accuracy 1.5 6 1 4 0.5 2 0 0 0 10 20 30 40 50 60 70 80 90 100 -30 -10 10 30 50 70 90 Relative humidity %RH Temperature C Figure 3 Typical and maximal tolerance for temperature sensor Figure 2 Typical and maximal tolerance for relative humidity in in C. %RH at 25 C. 1 6 For definition of typ. and max. accuracy tolerance, please refer to the Time for achieving 63% of a humidity step function, valid at 25C and 1 m/s document Sensirion Humidity Sensor Specification Statement. airflow. Humidity response time in the application depends on the design-in of the 2 sensor. The stated repeatability is 3 times the standard deviation (3) of multiple 7 Typical value for operation in normal RH/T operating range. Max. value is < 0.5 consecutive measurement values at constant conditions and is a measure for the noise on the physical sensor output. %RH/y. Value may be higher in environments with vaporized solvents, out- 3 gassing tapes, adhesives, packaging materials, etc. For more details please refer Resolution of A/D converter. to Handling Instructions. 4 Specified range refers to the range for which the humidity or temperature 8 Temperature response time depends on heat conductivity of sensor substrate sensor specification is guaranteed. and design-in of sensor in application. 5 For details about recommended humidity and temperature operating range, 9 Max. value is < 0.04C/y. please refer to section 1.1. www.sensirion.com Version 4 August 2015 2/14