Digital humidity and temperature sensor-AM2301 AOSONG
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Your specialist in innovating humidity & temperature sensors Digital relative humidity & temperature sensor AM2301 1. Feature & Application: *High precision *Outstanding long-term stability *Capacitive type *Extra components not needed *Full range temperature compensated *Long transmission distance, up to 100 meters *Relative humidity and temperature measurement *Low power consumption *Calibrated digital signal 2. Description: AM2301 output calibrated digital signal. It applys 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(100m) enable AM2301 to be suited in all kinds of harsh application occasions. 3. Technical Specification: Model AM2301 Power supply 3.3-5.5V DC Output signal digital signal via Aosong 1-wire bus Sensing element Polymer humidity capacitor Operating range humidity 0-100%RH; temperature -40~80Celsius Accuracy humidity +-3%RH(Max +-5%RH); temperature +-0.5Celsius Resolution or sensitivity Repeatability humidity +-1%RH; Humidity hysteresis +-0.5%RH Long-term Stability +-0.5%RH/year Interchangeability fully interchangeable 4. Dimensions of AM2301(unit----mm) and wiring diagram: -1- http://www.aosong.com Thomas Liu (Sales Manager) Email: thomasliu198518@aliyun.com , sales@aosong.com

Your specialist in innovating humidity A temperature sensors Dimensions of AM2301's PCB board as above 5. Electrical connection diagram: Rp is pull up resistor, when transmission distance beyond Thomas Liu (Sales Manager)

Your specialist in innovating humidity & temperature sensors 6. Operating specifications: (1) Power and Pins Power's voltage should be 3.3-5.5V DC. When power is supplied to sensor, don't send any instruction to the sensor within one second to pass unstable status. One capacitor valued 100nF can be added between VDD and GND for wave filtering. (2) Communication and signal Aosong 1-wire bus is used for communication between MCU and AM2301. ( Aosong 1-wire bus is specially designed by Aosong ELectronics Co., Ltd. , it's different from Maxim/Dallas 1-wire bus, so it's incompatible with Dallas...

_Your specialist in innovating humidity A temperature sensors Host's signal Sensor's signal 1) Step 1: MCU send out start signal to AM2301 and AM2301 send response signal to MCU Data-bus's free status is high voltage level. When communication between MCU and AM2301 begins, MCU will pull low data-bus and this process must beyond at least l~10ms to ensure AM2301 could detect MCUs signal, then MCU will pulls up and wait 20-40us for AM2301's response. When AM2301 detect the start signal, AM2301 will pull low the bus 80us as response signal, then AM2301 pulls up 80us for preparation to send...

_Your specialist in innovating humidity A temperature sensors Sensor outputs 1 bit data of" 0 Start transmit 1 bit data. Start transmit next 1 bit data Host's signal Sensor's signal Sensor outputs 1 bit data of" 1 " 8. Error and sources of error: Measure values maybe influenced by follow factors: Humidity errors Equilibration time too short, steam, water sprays, dripping water or condensation at the sensor, etc. Temperature errors Equilibration time too short, cold or hot outside wall, sunlights, heating elements, etc. Thomas Liu (Sales Manager)

Your specialist in innovating humidity & temperature sensors 9. Attentions of application: (1) Operating and storage conditions We don't recommend the applying RH-range beyond the range stated in this specification. The AM2301 sensor can recover after working in abnormal operating condition to calibrated status, but will accelerate sensors' aging. (2) Attentions to chemical materials Vapor from chemical materials may interfere AM2301's sensitive-elements and debase AM2301's sensitivity. (3) Disposal when (1) & (2) happens Step one: Keep the AM2301 sensor at condition of Temperature...

Your specialist in innovating humidity & temperature sensors the warranty period and make proper prove for the defect. Customer shall be responsible for packaging and shipping the defective product to the service center designated by Aosong, with shipping charges prepaid. Aosong shall pay for the return of the product to customer if the shipment is to a location within the country in which the Aosong service center is located. Customer shall be responsible for paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations. This warranty shall...