DHT22 View Datasheet(PDF) - Unspecified
Part Name
Description
MFG CO.
'DHT22' PDF : 10 Pages View PDF
Aosong Electronics Co.,Ltd
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Your specialist in innovating humidity & temperature sensors
1. Feature & Application:
* Full range temperature compensated * Relative humidity and temperature measurement
* Calibrated digital signal *Outstanding long-term stability *Extra components not needed
* Long transmission distance * Low power consumption *4 pins packaged and fully interchangeable
2. Description:
DHT22 output calibrated digital signal. It utilizes exclusive digital-signal-collecting-technique and humidity
sensing technology, assuring its reliability and stability.Its sensing elements is connected with 8-bit single-chip
computer.
Every sensor of this model is temperature compensated and calibrated in accurate calibration chamber and the
calibration-coefficient is saved in type of programme in OTP memory, when the sensor is detecting, it will cite
coefficient from memory.
Small size & low consumption & long transmission distance(20m) enable DHT22 to be suited in all kinds of
harsh application occasions.
Single-row packaged with four pins, making the connection very convenient.
3. Technical Specification:
Model
Power supply
Output signal
Sensing element
Operating range
Accuracy
Resolution or sensitivity
Repeatability
Humidity hysteresis
Long-term Stability
Sensing period
Interchangeability
Dimensions
DHT22
3.3-6V DC
digital signal via single-bus
Polymer capacitor
humidity 0-100%RH;
temperature -40~80Celsius
humidity +-2%RH(Max +-5%RH); temperature <+-0.5Celsius
humidity 0.1%RH;
humidity +-1%RH;
+-0.3%RH
+-0.5%RH/year
Average: 2s
fully interchangeable
small size 14*18*5.5mm;
temperature 0.1Celsius
temperature +-0.2Celsius
big size 22*28*5mm
4. Dimensions: (unit----mm)
1) Small size dimensions: (unit----mm)
2
Thomas Liu (Business Manager)
Email: thomasliu198518@yahoo.com.cn
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