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SHT21S Datasheet(PDF) 2 Page - List of Unclassifed Manufacturers |
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SHT21S Datasheet(HTML) 2 Page - List of Unclassifed Manufacturers |
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2 / 10 page  www.sensirion.com Version 4 – May 2014 2/10 Sensor Performance Relative Humidity123 Parameter Condition Value Units Resolution 12 bit 0.04 %RH Accuracy tolerance 1 typ 2.0 %RH max see Figure 2 %RH Repeatability 0.1 %RH Hysteresis 1 %RH Nonlinearity <0.1 %RH Response time 2 63% 8 s Operating Range extended 3 0 to 100 %RH Long Term Drift 4 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. For electronic impacts on accuracy please consult Sect. 5.3. Electrical Specification Parameter Condition min typ max Units Supply Voltage, VDD 2.1 3.0 3.6 V Supply Current, IDD 5 160 µA Power Dissipation 5 0.48 mW Measurement Frequency 2 Hz Switch RH/T on SDA SCL up RH; SCL down T Table 1 Electrical specification. For absolute maximum values see Chapter 4.1 of Users Guide. 1 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. 2 Time for achieving 63% of a step function, valid at 25°C and 1 m/s airflow. 3 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. Temperature456 Parameter Condition Value Units Resolution 14 bit 0.01 °C Accuracy tolerance 1 typ 0.3 °C max see Figure 3 °C Repeatability 0.1 °C Operating Range extended 3 -40 to 125 °C Response Time 6 63% 5 to 30 s Long Term Drift 7 Typ. < 0.02 °C/yr Figure 3 Typical and maximal temperature accuracy tolerance. For electronic impacts on accuracy please consult Sect. 5.3. Packaging Information Sensor Type Packaging Quantity Order Number SHT21S Tape & Reel 400 1-100718-01 Tape & Reel 1500 1-100697-01 Tape & Reel 5000 1-100696-01 This datasheet is subject to change and may be amended without prior notice. 4 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. 5 Values of Supply Current and Power Dissipation are based upon fixed VDD = 3.0V and T = 25°C applying a low pass filter as proposed in Sect. 5.3. 6 Response time depends on heat conductivity of sensor substrate. 7 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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