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SHTW2 Datasheet(PDF) 3 Page - List of Unclassifed Manufacturers |
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3 / 14 page www.sensirion.com Version 2 – August 2016 3/14 1.1 RH Accuracy at Various Temperatures Typical RH accuracy at 25°C is defined in Figure 2. For other temperatures, typical accuracy has been evaluated to be as displayed in Figure 4. Figure 4 Typical accuracy of relative humidity measurements given in %RH for temperatures 0 – 80°C. 1.2 Recommended Storage and Operating Conditions The sensor shows best performance when operated within recommended normal temperature and humidity range of 5 – 60 °C and 20 – 80 %RH, respectively. Long term exposure to conditions outside normal range, especially at high humidity, may temporarily offset the RH signal (e.g. +3%RH after 60h at >80%RH). After returning into the normal temperature and humidity range the sensor will slowly come back to calibration state by itself. Prolonged exposure to extreme conditions may accelerate ageing. To ensure stable operation of the humidity sensor, the conditions described in the document “SHTxx Handling Instructions” regarding exposure to volatile organic compounds have to be met. Please note as well that this does apply not only to transportation and manufacturing, but also to operation of the SHTW2. 2 Electrical Specifications 2.1 Electrical Characteristics Default conditions of 25 °C and 1.8 V supply voltage apply to values in the table below, unless otherwise stated. Parameter Symbol Conditions Min Typ. Max Units Comments Supply voltage VDD - 1.62 1.8 1.98 V - Power-up/down level VPOR Static power supply 1.05 1.2 1.35 V - Supply current IDD Idle state - 0.7 1.5 µA - Measurement - 385 465 µA Average current consumption while sensor is measuring10 Average - 4.8 - µA Average current consumption (continuous operation with one measurement per second)10 Power consumption - Average - 8.6 - µW Average power consumption (continuous operation with one measurement per second) 10 Low level input voltage VIL - -0.5 - 0.3 VDD V - High level input voltage VIH - 0.7 VDD - VDD(max) + 0.5 V - Low level output voltage VOL 3 mA sink current - - 0.2 VDD - - Table 3 Electrical specifications. 2.2 Absolute Maximum Ratings Stress levels beyond those listed in Table 4 may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these conditions cannot be guaranteed. Exposure to the absolute maximum rating conditions for extended periods may affect the reliability of the device. 10 These values can be reduced by using the low power measurement mode, see separate application note. 100 ±4.5 ±4 ±4 ±4 ±4 ±4 ±4.5 ±5 ±5 90 ±4.5 ±4 ±3.5 ±3.5 ±3.5 ±3.5 ±4 ±4.5 ±5 80 ±4 ±3.5 ±3 ±3 ±3 ±3.5 ±3.5 ±4 ±4.5 70 ±4 ±3.5 ±3 ±3 ±3 ±3 ±3.5 ±3.5 ±4 60 ±3.5 ±3 ±3 ±3 ±3 ±3 ±3 ±3.5 ±3.5 50 ±3.5 ±3 ±3 ±3 ±3 ±3 ±3 ±3 ±3.5 40 ±3.5 ±3 ±3 ±3 ±3 ±3 ±3 ±3 ±3 30 ±3.5 ±3 ±3 ±3 ±3 ±3 ±3 ±3 ±3 20 ±3.5 ±3.5 ±3 ±3 ±3 ±3 ±3 ±3 ±3 10 ±4 ±4 ±3.5 ±3.5 ±3.5 ±3.5 ±3.5 ±3.5 ±3.5 0 ±4.5 ±4.5 ±4 ±4 ±4 ±4 ±4 ±4 ±4 0 10 20 30 40 50 60 70 80 Temperature [°C] |
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