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SHT20 Datasheet(PDF) 2 Page - List of Unclassifed Manufacturers |
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SHT20 Datasheet(HTML) 2 Page - List of Unclassifed Manufacturers |
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2 / 14 page  www.sensirion.com Version 4 – May 2014 2/14 Sensor Performance Relative Humidity1234 Parameter Condition Value Units Resolution 1 12 bit 0.04 %RH 8 bit 0.7 %RH Accuracy tolerance 2 typ 3.0 %RH max see Figure 2 %RH Repeatability 0.1 %RH Hysteresis 1 %RH Nonlinearity <0.1 %RH Response time 3 63% 8 s Operating Range extended 4 0 to 100 %RH Long Term Drift 5 Typ. < 0.25 %RH/yr Figure 2 Typical and maximal tolerance at 25°C for relative humidity. For extensive information see Users Guide, Sect. 1.2. Electrical Specification Parameter Condition min typ max Units Supply Voltage, VDD 2.1 3.0 3.6 V Supply Current, IDD 6 sleep mode 0.15 0.4 µA measuring 200 300 330 µA Power Dissipation 6 sleep mode 0.5 1.2 µW measuring 0.6 0.9 1.0 mW average 8bit 3.2 µW Heater VDD = 3.0 V 5.5mW, T = + 0.5-1.5°C Communication digital 2-wire interface, I2C protocol Table 1 Electrical specification. For absolute maximum values see Section 4.1 of Users Guide. 1 Default measurement resolution is 14bit (temperature) / 12bit (humidity). It can be reduced to 12/8bit, 11/11bit or 13/10bit by command to user register. 2 Accuracies are tested at Outgoing Quality Control at 25°C and 3.0V. Values exclude hysteresis and long term drift and are applicable to non-condensing environments only. 3 Time for achieving 63% of a step function, valid at 25°C and 1m/s airflow. 4 Normal operating range: 0-80%RH, beyond this limit sensor may read a reversible offset with slow kinetics (+3%RH after 60h at humidity >80%RH). For more details please see Section 1.1 of the Users Guide. Temperature567 Parameter Condition Value Units Resolution 1 14 bit 0.01 °C 12 bit 0.04 °C Accuracy tolerance 2 typ 0.3 °C max see Figure 3 °C Repeatability 0.1 °C Operating Range extended 4 -40 t0 125 °C Response Time 7 63% 5 to 30 s Long Term Drift8 Typ. < 0.02 °C/yr Figure 3 Typical and maximal tolerance for temperature sensor in °C. Packaging Information Sensor Type Packaging Quantity Order Number SHT20 Tape & Reel 1500 1-100706-01 Tape & Reel 5000 1-100704-01 This datasheet is subject to change and may be amended without prior notice. 5 Typical value for operation in normal RH/T operating range. Max. value is < 0.5 %RH/y. Value may be higher in environments with vaporized solvents, out- gassing tapes, adhesives, packaging materials, etc. For more details please refer to Handling Instructions. 6 Min and max values of Supply Current and Power Dissipation are based on fixed VDD = 3.0V and T<60°C. The average value is based on one 8bit measurement per second. 7 Response time depends on heat conductivity of sensor substrate. 8 Max. value is < 0.04°C/y. ± 0 ± 2 ± 4 ± 6 ± 8 ± 10 0 10 20 30 40 50 60 70 80 90 100 ΔRH (%RH ) Relative Humidity (%RH) maximum accuracy typical accuracy ± 0.0 ± 0.5 ± 1.0 ± 1.5 ± 2.0 -40 -20 0 20 40 60 80 100 120 ΔT ( C) Temperature (°C) maximum accuracy typical accuracy |
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