SHT11 SENSIRION, SHT11 Datasheet
SHT11
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SHT11 Summary of contents
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... Figure 1: Drawing of SHT1x sensor packaging, dimensions in mm (1mm = 0.039inch). Sensor label gives “11” for SHT11 as an example. Contacts are assigned as follows: 1:GND, 2:DATA, 3:SCK, 4:VDD. www.sensirion.com Each SHT1x is individually calibrated in a precision humidity chamber. The calibration coefficients are programmed into an OTP memory on the chip ...
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... Values for VDD=3.3V at 25°C, average value at one 12bit measurement per second. Response time depends on heat capacity of and thermal resistance to sensor substrate. typ max Units 0.01 ° bit °C °C °C °C 123.8 °C 254.9 ° °C/yr SHT11 SHT15 60 80 100 Order Number 1-100218-04 1-100051-04 1-100098-04 1-100524-04 1-100085-04 1-100093-04 2/11 ...
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... IMPORTANT: After soldering the devices should be stored at >75%RH for at least 12h to allow the polymer to re- hydrate. Otherwise the sensor may read an offset that slowly disappears if exposed to ambient conditions ...
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... For optimal response times the air volume behind the membrane must be kept minimal. Sensirion recommends and supplies the SF1 filter cap for optimal IP54 protection (for higher protection – i.e. IP67 - SF1 must be sealed to the PCB with epoxy). Please compare Figure 9 ...
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... Figure 10: Typical application circuit, including pull up resistor R and decoupling of VDD and GND by a capacitor. P www.sensirion.com 2.2 SCK is used to synchronize the communication between microcontroller and SHT1x. Since the interface consists of fully static logic there is no minimum SCK frequency. 2.3 The DATA tri-state pin is used to transfer data in and out of the sensor ...
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... VDD. The slew rate during power up shall not fall below 1V/ms. After power-up the sensor needs 11ms to get to Sleep State. No commands must be sent before that time. www.sensirion.com 3.2 To initiate a transmission, a Transmission Start sequence has to be issued. It consists of a lowering of the DATA line while SCK is high, followed by a low pulse on SCK and raising DATA again while SCK is still high – ...
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... Figure 17: Example RH measurement sequence for value “0000’0100“0011’0001” = 1073 = 35.50%RH (without temperature compensation). DATA valid times are given and referenced in boxes on DATA line. Bold DATA lines are controlled by sensor while plain lines are controlled by the micro-controller. www.sensirion.com 3.6 Some of the advanced functions of the SHT1x such as ...
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... V4 sensors. The parameter set for V3 sensors, which has 12bit RH been proposed in earlier datasheets, still applies and is 0 14bit Temp. provided by Sensirion upon request. Values higher than 99% RH indicate fully saturated air and must be processed and displayed as 100%RH note that the humidity sensor has no significant voltage dependency. ...
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... Sensor performance under other test conditions cannot be 0.04 0.072 guaranteed and is not part of the sensor specifications. Especially, no guarantee can be given for sensor performance in the field or for customer’s specific application. Please contact Sensirion for detailed information Environment HTSL TC UHST THU ...
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... Lot No.: XX0-NN-YRRRTTTTT Quantity: RRRR RoHS: Compliant Lot No. Figure 19: First label on reel Sensor Type (11 for SHT11 Chip Version (04 for V4 last digit of year, RRR = number of sensors on reel divided by 10 (200 for 2000 units), TTTTT = Traceability Code. Device Type: 1-100PPP-NN Description: Humidity & Temperature Sensor SHTxx Part Order No ...
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... WARRANTIES, INCLUDING WITHOUT LIMITATION, WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE EXPRESSLY EXCLUDED AND DECLINED. SENSIRION is only liable for defects of this product arising under the conditions of operation provided for in the data sheet and proper use of the goods. SENSIRION explicitly disclaims all warranties, express or implied, for any period during which the goods are operated or stored not in accordance with the technical specifications ...