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ASAIR

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AM2311A Technical Manual

Temperature and Humidity Sensor

• Full calibration

• Digital output, unibus interface

• Excellent long-term stability

• Quick response and strong anti-jamming capability

AM2311A Digital Temperature and Humidity Module is a temperature and humidity composite sensor with its

calibrated digital signal output.It applies special digital module acquisition technology and temperature and

humidity sensing technology,to ensure that the product has high reliability and excellent long-term stability.The

product has the advantages of excellent quality, ultra-fast response, strong anti-interference ability and high

cost performance.Each sensor is calibrated in an extremely accurate humidity calibration laboratory.Calibration

coefﬁcients are stored in the form of program in the single chip computer. These calibration coefﬁcients are called

in the process of processing the detection signal inside the sensor. Standard single bus interface makes system

integration easy and fast.Standard single bus interface makes system integration easy and fast. Ultra-small size,

very low power consumption,Signal transmission distance can reach more than 20 meters, making it the best

choice for all kinds of applications and even the most demanding applications. Products are cited as 3Wire

(single bus interface) connection is convenient. Special encapsulation forms can be provided according to user's

needs requirements.

Product overview

Application scope

HVAC system, dehumidiﬁer,test and inspection equipment,consumer goods,automobiles,automatic

control, data recorder,weather station,household appliances,humidity regulation,medical and other related

temperature and humidity detection and control.

Figure 1: AM2311A Sensor Package Diagram (Unit: mm Unmarked tolerance: 0.1 mm)

www.aosong.com Guangzhou Aosong Electronics Co.,Ltd. Tel: 400-630- 5378 Versior:V1. 0

Summary of content (8 pages)

PAGE 1
AM2311A Technical Manual ASAIR ® Temperature and Humidity Sensor •Full calibration •Digital output, unibus interface •Excellent long-term stability •Quick response and strong anti-jamming capability Product overview AM2311A Digital Temperature and Humidity Module is a temperature and humidity composite sensor with its calibrated digital signal output.
PAGE 2
ASAIR ® AM2311A Technical Manual Sensor performance Relative humidity Parameter Temperature Min Condition Typical Unit Max Resolution ratio Measuring range extended Parameter Condition Typical Max Unit Resolution ratio 1 See Figure 2 Accuracy 2 See Figure 3 Accuracy Repeatability Measuring range completely interchangeable Interchangeability Response time 3 Repeatability completely interchangeable Interchangeability Hysteresis Response time Drift 4 Drift Table 1 Min Humidity
PAGE 3
ASAIR ® AM2311A Technical Manual AM2311A User Guide 2 Application information 1 Expansion of performance 2.1 Storage conditions and instructions 1.1 Working conditions The humidity sensitivity level (MSL) is 1, according to IPC/JEDEC J-STD-020 standard. Therefore, it is recommended to use it within one year after delivery. The sensor performance is stable in the suggested working scope, as shown in Figure 4.
PAGE 4
ASAIR ® AM2311A Technical Manual 2.4 Material used for sealing and encapsulation Many materials absorb moisture and act as buffer, which will increase response time and hysteresis. Therefore, the material around the sensor should be carefully selected. Recommended materials are: metal materials, LCP, POM (Delrin), PTFE (Teﬂon), PE, PEEK, PP, PB, PPS, PSU, PVDF, and PVF.
PAGE 5
ASAIR ® AM2311A Technical Manual 5.2 One-wire bus communication protocol ◎Examples for one-wire bus data calculation Example 1:Received 40 bit data is： ◎ One-wire bus descriptions The AM2311A uses simpliﬁed one-wire bus communication, the one-wire bus has only one data line, and the data exchange and control in the system are completed by the data line.
PAGE 6
ASAIR ® AM2311A Technical Manual Table 7 One-wire bus signal characteristics Symbol Parameter min type max Units T be T go Time of the host start signal is pulled low Time of the host releases the bus 0.
PAGE 7
ASAIR ® AM2311A Technical Manual The back of the box is also tagged, as shown in ﬁgure 13, and provides additional tracking information. ASAIR Modle: ® Sensor AM2311A Quantity: 1PCS XXXXXXXX Figure13 The label on the color box 7.2 Transport packaging Figure 11 The one-wire bus read ﬂow chart AM2311A is independently packaged in a color box, each color box is packaged with a sensor, each 100 color boxes are placed in a carton, a total of 100 sensors.
PAGE 8
ASAIR ® AM2311A Technical Manual Version Date 2019/03 Version V1.0 Page 1-8 Alteration Initial Version This manual is likely to change sometime without prior notice. Attention Warning of personal injury Quality assurance Do not apply this product to safety protection devices or emergency stop equipment, as well as any other applications that may cause personal injury due to the failure of the product. This product cannot be used unless there is a special purpose or with an authorization to use it.