DHT22- (Temperature and humidity sensor)

Description:

AM2302 product overview:

AM2302 digital temperature and humidity sensor is a digital signal containing a calibrated temperature and humidity sensor signal output of the complex. It uses dedicated digital module acquisition technology and temperature and humidity sensing technology to ensure that the product has extremely high reliability and excellent long-term stability. The electrical sensor comprises a capacitance-type sensing the wet element, and an NTC for the temperature measuring element, and with a phase, the high-performance 8-bit microcontroller is connected. Therefore, the product has the advantages of excellent quality, ultra-fast response, strong anti-interference ability, and high-cost performance. Each AM2302 sensor is calibrated in an extremely accurate humidity calibration room. The calibration coefficients are stored in the OTP memory in the form of a program, and these calibration coefficients are called during the processing of the detection signal inside the sensor. Single-wire serial interface, system integration becomes simpler and quicker. Ultra-small size, extremely low power consumption, and signal transmission distance of up to 20 meters or more make it the choice for various applications and even the most demanding applications. The product is a 4-  pin single-row pin package. The connection is convenient, and the special packaging form can be provided according to user needs. 

Applications:

HVAC, dehumidifiers, testing and inspection equipment, consumer products, automobiles, automatic controls, data loggers, home appliances, humidity regulators, medical care, weather stations, and other related humidity detection and control.

Product highlights:

Ultra-low energy consumption, long transmission distance, fully automatic calibration, capacitive humidity sensor, complete interchangeability, standard digital single bus output, excellent long-term stability, high-precision NTC

Technical Details :

• Supply voltage: DC: 3.3-5.5V
• Measuring range (temperature): -40~+80℃
• Measuring range (humidity): 0~99.9%RH
• Temperature accuracy: ±0.5℃
• Humidity accuracy: ±2%RH
• Resolution:  Temperature: 0.1℃, Humidity: 0.1%RH
• Attenuation value (temperature): <0.1℃/year
• Consumption current : up to 100 mca
• Sampling frequency: ≤ 1 Hz