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The AM2302 is a combined temperature and humidity sensor with calibrated digital signal output. It applies specialized digital module acquisition technology and temperature-humidity sensing technology, ensuring extremely high reliability and excellent long-term stability.
2. Working Principle:
The sensor consists of a capacitive humidity-sensing element, a high-precision temperature-sensing element, and a high-performance 8-bit microcontroller. Calibration coefficients are stored in the microcontroller as a program, which are called during the processing of detected signals inside the sensor.
3. Supply Voltage:
3.3 - 6V
4. Signal Transmission:
Adopts a single-wire serial interface with 40-bit data transmission (MSB first).
Communication time: Approximately 5ms per cycle.
Data format: 16-bit humidity data + 16-bit temperature data + 8-bit checksum.
5. Measurement Range and Accuracy:
Humidity:
Range: 0 - 100% RH
Accuracy: 2 - 5% RH
Temperature:
Range: -40 - 80°C
Accuracy: ±0.5°C
6. Power Consumption:
2.5mA max (during conversion, i.e., when requesting data)
7. Dimensions:
Main body: 27mm x 59mm x 13.5mm
Cable length: 23cm
8. Response Time:
The temperature and humidity data read by the host from AM2302 is always the previous measurement value.
When the interval between two measurements is long, read twice consecutively and take the second value as the real-time data.
Minimum interval between two reads: 2 seconds.
9. Interface Description:
Typically includes 3 - 5V power pin, data pin, and ground pin.
Although it uses a single wire for data transmission, it is incompatible with the Dallas 1 - wire bus.
For multiple sensors, each must have its independent data pin.
The sensor internally has a 5.1kΩ pull-up resistor connecting VCC and data pin, so external pull-up resistors are generally unnecessary.
Supply Voltage
3.3V - 5.5V (5V recommended)
Humidity Measurement Range
0% RH - 99.9% RH
Humidity Measurement Error
±2% RH (at 25°C)
Temperature Measurement Range
-40°C - 80°C
Temperature Measurement Error
±0.5°C (at 25°C)
Resolution
0.1% RH (humidity), 0.1°C (temperature)
Output Signal Type
Single-wire digital signal
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Trading Company
Year Established:
2006
Total Annual:
900000-1000000
Employee Number:
50~80
Ecer Certification：
Verified Supplier
Yijiajie Electronics is a full range of silicon pressure sensors from the United States, FREESCALE/, GE, MEAS, SMI, and a full range of sensing and control products from the United States pressure, temperature and humidity, gas flow, current, Hall effect, etc., Japan HAMAMATSU flame, UV sensors, ph... Yijiajie Electronics is a full range of silicon pressure sensors from the United States, FREESCALE/, GE, MEAS, SMI, and a full range of sensing and control products from the United States pressure, temperature and humidity, gas flow, current, Hall effect, etc., Japan HAMAMATSU flame, UV sensors, ph...
