Datasheet SHT3xA-DIS Automotive Grade Humidity and Temperature Sensor Automotive grade, AEC-Q100 qualified Fully calibrated, linearized, and temperature compensated digital output Wide supply voltage range, from 2.4 V to 5.5 V I2C Interface with communication speeds up to 1 MHz and two user selectable addresses Typical accuracy of 1.5 %RH and 0.2 C for SHT35A Very fast start-up and measurement time Product Summary SHT3xA-DIS is the next generation of Sensirions up to 1 MHz. The DFN package has a footprint of 2.5 x 2 automotive grade temperature and humidity sensors. It 2.5 mm while keeping a height of 0.9 mm. This allows builds on a new CMOSens sensor chip that is at the for integration of the SHT3xA-DIS into a great variety of heart of Sensirions new humidity and temperature applications. Additionally, the wide supply voltage range platform. The SHT3xA-DIS has increased intelligence, of 2.4 V to 5.5 V guarantees compatibility with a wide reliability and improved accuracy specifications range of applications. Its design and test coverage is compared to its predecessor. Its functionality includes specifically optimized for the high quality standards of the enhanced signal processing, two distinctive and user automotive industry. selectable I2C addresses and communication speeds of 9 Further Information ............................................ 19 Benefits of Sensirions CMOSens Technology High reliability and long-term stability nRESET Industry-proven technology with a track record of more than 15 years RH Sensor T Sensor VDDVDD Designed for mass production VSSVSS Power on ADCADC High process capability Reset High signal-to-noise ratio Calibration Memory Content Data processing RESET 1 Sensor Performance............................................. 2 & Linearization 2 Specifications ....................................................... 6 Digital Interface Alert Logic 3 Pin Assignment .................................................... 8 4 Operation and Communication ............................. 9 ADDR SDA SCL Alert 5 Packaging ........................................................... 15 Figure 1 Functional block diagram of the SHT3xA-DIS. The sensor signals for humidity and temperature are factory 6 Shipping Package .............................................. 17 calibrated, linearized and compensated for temperature 7 Quality ................................................................ 18 and supply voltage dependencies. 8 Ordering Information........................................... 18 www.sensirion.com December 2019 - Version 7 1/21 Datasheet SHT3xA-DIS 1 Sensor Performance Humidity Sensor Specification Parameter Condition Value Units Typ. 3 %RH 1 SHT30A Accuracy tolerance Max. Figure 2 - Typ. 2 %RH 1 SHT31A Accuracy tolerance Max. Figure 3 - Typ. 1.5 %RH 1 SHT35A Accuracy tolerance Max. Figure 4 - Low, typ. 0.21 %RH 2 Repeatability Medium, typ. 0.15 %RH High, typ. 0.08 %RH Resolution Typ. 0.01 %RH Hysteresis at 25C %RH 0.8 3 4 Specified range extended 0 to 100 %RH 5 6 Response time 8 s 63% 7 Long-term drift Typ. <0.25 %RH/yr Table 1 Humidity sensor specification. Temperature Sensor Specification Parameter Condition Value Units 1 typ., 0C to 65C C 0.3 SHT30A Accuracy tolerance max. Figure 8 - 1 typ., -40C to 90C 0.3 C SHT31A Accuracy tolerance max. Figure 9 - 1 typ., -40C to 90C 0.2 C SHT35A Accuracy tolerance max. Figure 10 - Low, typ. 0.15 C 2 Repeatability Medium, typ. 0.08 C High, typ. 0.04 C Resolution Typ. 0.01 C Specified Range - -40 to 125 C 8 Response time >2 s 63% Long Term Drift max <0.03 C/yr Table 2 Temperature sensor specification. 1 For definition of typical and maximum accuracy tolerance, please refer to the document Sensirion Humidity Sensor Specification Statement. 2 The stated repeatability is 3 times the standard deviation (3) of multiple consecutive measurements at the stated repeatability and at constant ambient conditions. It is a measure for the noise on the physical sensor output. Different measurement modes allow for high/medium/low repeatability. 3 Specified range refers to the range for which the humidity or temperature sensor specification is guaranteed. 4 For details about recommended humidity and temperature operating range, please refer to section 1.1. 5 Time for achieving 63% of a humidity step function, valid at 25C and 1m/s airflow. Humidity response time in the application depends on the design-in of the sensor. 6 With activated ART function (see section 4.7) the response time can be improved by a factor of 2. 7 Typical value for operation in normal RH/T operating range, see section 1.1. Maximum value is < 0.5 %RH/yr. Higher drift values might occur due to contaminant environments with vaporized solvents, out-gassing tapes, adhesives, packaging materials, etc. For more details please refer to Handling Instructions. 8 Temperature response times strongly depend on the type of heat exchange, the available sensor surface and the design environment of the sensor in the final application. www.sensirion.com December 2019 - Version 7 2/21