AM2302 Просмотр технического описания (PDF) - Unspecified
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AM2302 Datasheet PDF : 11 Pages
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4、The definition of single-bus interface
4.1 AM2302 Pin assignments
Table 1： AM2302 Pin assignments
Pin
Name
Description
①
VDD Power (3.3V-5.5V)
②
SDA
Serial data, bidirectional port
③
NC
Empty
④
GND Ground
PIC1： AM2302 Pin Assignment
4.2 Power supply pins（VDD GND）
AM2302 supply voltage range 3.3V - 5.5V, recommended supply voltage is 5V.
4.3 Serial data（SDA）
SDA pin is tri structure for reading, writing sensor data. Specific communication timing, see the detailed
description of the communication protocol.
5、Sensor performance
5.1 Relative humidity
Table 2： AM2302 Relative humidity performance table
Parameter Condition min typ max Unit
Resolution
0.1
%RH
Range
0
99.9 %RH
Accuracy [1]
25℃
±2
%RH
Repeatability
±0.3
%RH
Exchange
Completely interchangeable
Response [2] 1/e(63%)
<5
S
Sluggish
<0.3
%RH
Drift [3]
Typical
<0.5
%RH/yr
5.2 Temperature
Table 3： AM2302 Relative temperature performance
Parameter Condition min typ max Unit
Resolutio
0.1
℃
n
16
bit
Accuracy
±0.5 ±1 ℃
Range
-40
80
℃
Repeat
±0.2
℃
Exchange
Completely interchangeable
Response 1/e(63%)
<10
S
Drift
±0.3
℃/yr
Pic2: At25℃ The error of relative humidity
Pic3：The maximum temperature error
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