Datasheet SHTC3 Humidity and Temperature Sensor IC Ultra-low power consumption Full battery supply voltage range (1.62 - 3.6 V) 3 Small DFN package: 2 2 0.75 mm Typical accuracy: 2 %RH and 0.2 C Fully calibrated and reflow solderable Power-up and measurement within 1 ms NIST traceability Product Summary The sensor covers a humidity measurement range of 0 to The SHTC3 is a digital humidity and temperature sensor 100 %RH and a temperature measurement range of designed especially for battery-driven high-volume - 40 C to 125 C with a typical accuracy of 2 %RH and consumer electronics applications. This sensor is strictly 0.2C. The broad supply voltage of 1.62 V to 3.6 V and designed to overcome conventional limits for size, power an energy budget below 1 J per measurement make the consumption, and performance to price ratio in order to SHTC3 suitable for mobile or wireless applications fulfill current and future requirements. Sensirions powered by batteries. With the industry-proven quality and CMOSens technology offers a complete sensor system reliability of Sensirions humidity and temperature sensors on a single chip, consisting of a capacitive humidity sensor, a bandgap temperature sensor, analog and digital signal and constant accuracy over a large measurement range, the SHTC3 offers best performance-to-price ratio. Tape processing, A/D converter, calibration data memory, and a 2 and reel packaging together with suitability for standard digital communication interface supporting I C Fast Mode 3 SMD assembly processes make the SHTC3 predestined Plus. The small 2 2 0.75 mm DFN package enables 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 15 years RH sensor T sensor Designed for mass production Optimized for lowest cost Signal conditioning Signal conditioning High signal-to-noise ratio Contents of this Data Sheet analog ADC 1 Humidity and Temperature Sensor digital Specifications ............................................................ 2 2 Electrical Specifications ..................................... 3 Data processing and system control 3 Timing Specifications......................................... 4 2 4 Interface Specifications ..................................... 6 Calibration mem. I C interface 5 Operation and Communication .......................... 6 VDD VSS SDA SCL 6 Quality ............................................................... 9 7 Packaging and Traceability ............................... 9 8 Ordering Information.......................................... 9 Figure 1 Functional block diagram of the SHTC3. 9 Technical Drawings ......................................... 10 10 Further Information .......................................... 12 www.sensirion.com Version 3 January 2021 1/14 Figure 2 Typical and maximal tolerance for relative humidity in %RH at 25 C. 1 Humidity and Temperature Sensor Temperature Specifications Parameter Condition Value Unit Every SHTC3 is individually tested and calibrated and is Typ. 0.2 C 1 identifiable by its unique serial number. The serial number is Accuracy tolerance Max. see Figure 3 C stored in an unchangeable OTP memory. 2 Repeatability - 0.1 C For the calibration, Sensirion uses transfer standards, which 3 are subject to a scheduled calibration procedure. The Resolution - 0.01 C calibration of the reference, used for the calibration of the 4 Specified range - 40 to +125 C transfer standards, is NIST traceable through an ISO/IEC 8 Response time 63% <5 to 30 s 17025 accredited laboratory. 9 Long-term drift Typ. <0.02 C/y Table 2 Temperature sensor specifications. Relative Humidity Parameter Condition Value Unit Typ. %RH 2.0 1 T C Accuracy tolerance Max. see Figure 2 %RH 1.6 2 Repeatability - 0.1 %RH Maximum Accuracy 3 Resolution - 0.01 %RH Typical Accuracy 1.2 Hysteresis - 1 %RH 4 5 Specified range extended 0 to 100 %RH 0.8 6 Response time 8 s 63% 7 Long-term drift Typ. <0.25 %RH/y 0.4 Table 1 Humidity sensor specifications. 0 -40 -20 0 20 40 60 80 100 120 Temperature C RH %RH Figure 3 Typical and maximal tolerance for temperature sensor Maximum accuracy in C. 6 Typical Accuracy 4 2 0 0 10 20 30 40 50 60 70 80 90 100 Relative humidity %RH 1 6 For definition of typ. and max. accuracy tolerance, please refer to the document Time for achieving 63% of a humidity step function, valid at 25C and 1 m/s Sensirion Humidity Sensor Specification Statement. Specification applies to airflow. Humidity response time in the application depends on the design-in of normal mode. the sensor. 2 7 The stated repeatability is 3 times the standard deviation (3) of multiple Typical value for operation in normal RH/T operating range. Max. value is < consecutive measurement values at constant conditions and is a measure for the 0.5 %RH/y. Value may be higher in environments with vaporized solvents, out- noise on the physical sensor output. Specification applies to normal mode. gassing tapes, adhesives, packaging materials, etc. For more details please 3 Resolution of A/D converter. Specification applies to normal mode. refer to Handling Instructions. 4 8 Specified range refers to the range for which the humidity or temperature sensor Temperature response time depends on heat conductivity of sensor specification is guaranteed. substrate and design-in of sensor in application. 5 9 For details about recommended humidity and temperature operating range, please Max. value is < 0.04C/y. refer to section 1.2. www.sensirion.com Version 3 January 2021 2/14