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SHT21 Fiches technique(PDF) 1 Page - Sensirion AG Switzerland |
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SHT21 Fiches technique(HTML) 1 Page - Sensirion AG Switzerland |
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1 / 14 page  www.sensirion.com Version 5 – October 2022 1/14 Datasheet SHT21 Humidity and Temperature Sensor IC ▪ Fully calibrated ▪ Digital output, I2C interface ▪ Low power consumption ▪ Excellent long-term stability ▪ DFN type package – reflow solderable Dimensions Figure 1: Drawing of SHT21 sensor package, dimensions are given in mm (1 mm = 0.039 inch), tolerances are ±0.1 mm. The die pad (center pad) is internally connected to VSS. The NC pads must be left floating. VSS = GND, SDA = DATA. Numbering of E/O pads starts at lower right corner (indicated by notch in die pad) and goes clockwise (compare Table 2). Sensor Chip SHT21 features a generation 4C CMOSens® chip. Besides the capacitive relative humidity sensor and the band gap temperature sensor, the chip contains an amplifier, A/D converter, OTP memory and a digital processing unit. Material Contents While the sensor itself is made of Silicon the sensors’ housing consists of a plated Cu lead-frame and green epoxy-based mold compound. The device is fully RoHS and WEEE compliant, e.g. free of Pb, Cd and Hg. Additional Information and Evaluation Kits Additional information such as Application Notes is available from the web page www.sensirion.com/sht21. For more information please contact Sensirion via info@sensirion.com. For SHT2x two Evaluation Kits are available: EK-H4, a four-channel device with Viewer Software, that also serves for data-logging, and a simple EK-H5 directly connecting one sensor via USB port to a computer. 1.0 1.0 2.4 0.3 0.4 1.1 SCL SDA NC NC VSS VDD Bottom View 3.0 2.2 1.4 max 0.3 typ Product Summary The SHT21 humidity and temperature sensor of Sensirion has become an industry standard in terms of form factor and intelligence: Embedded in a reflow solderable Dual Flat No leads (DFN) package of 3 x 3mm foot print and 1.1 mm height it provides calibrated, linearized sensor signals in digital, I2C format. The SHT2x sensors contain a capacitive type humidity sensor, a band gap temperature sensor and specialized analog and digital integrated circuit – all on a single CMOSens® chip. This yields in an unmatched sensor performance in terms of accuracy and stability as well as minimal power consumption. Every sensor is individually calibrated and tested. Lot identification is printed on the sensor and an electronic identification code is stored on the chip – which can be read out by command. Furthermore, the resolution of SHT2x can be changed by command (8/12 bit up to 12/14 bit for RH/T) and a checksum helps to improve communication reliability. With this set of features and the proven reliability and long-term stability, the SHT2x sensors offer an outstanding performance-to-price ratio. For testing SHT2x two evaluation kits EK-H4 and EK-H5 are available. |
Numéro de pièce similaire - SHT21 |
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Description similaire - SHT21 |
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