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digital humidity sensor Adafruit Industries 5181 featuring MEMS capacitive technology and temperature sensing

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digital humidity sensor Adafruit Industries 5181 featuring MEMS capacitive technology and temperature sensing

Description : Humidity, Moisture Sensors RoHS

Mfr. Part # : 5181

Model Number : 5181

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Product Overview

The AM2301B is a digital humidity and temperature sensor module featuring a newly designed ASIC, an improved MEMS semiconductor capacitive humidity sensor, and an on-chip temperature sensor. It offers superior performance with typical accuracy of 2% RH and 0.3 T, and provides fully calibrated digital output via IC protocol. Designed for stability in harsh environments and equipped with fixed mounting holes for versatile installation, the AM2301B is suitable for applications in HVAC, dehumidifiers, testing equipment, consumer products, automobiles, data loggers, weather stations, and more.

Product Attributes

Brand: Aosong
Model: AM2301B
Protocol: IC
Certifications: ESD protection conforms to JEDECJESD22-A114 (4kV HBM) and JEDECJESD22-A115 (200V MM)

Technical Specifications

Parameter	Condition	Min	Typical	Max	Unit	Notes
Relative Humidity Characteristics
Resolution	-	-	0.024	-	%RH	-
Accuracy	-	-	2	-	%RH	Based on factory inspection at 3.3V, 25C (excluding hysteresis and non-linearity)
Tolerance	Max	-	See Figure 2	-	%RH	-
Repeatable	-	-	0.1	-	%RH	-
Hysteresis	-	-	1	-	%RH	-
Nonlinear	-	-	<0.1	-	%RH	-
Response Time (63%)	-	-	<8	-	s	At 25C and 1 m/s airflow
Scope of Work	Extended	0	-	100	%RH	-
Prolonged Drift	Normal	-	<1	-	%RH/yr	-
Electrical Specifications
Supply Voltage	Typical	2.2	3.3	5.5	V DC	-
Supply Current (IDD)	Dormancy	-	250	-	nA	At VCC = 3.3V, T < 60C
Supply Current (IDD)	Measure	-	980	-	A	At VCC = 3.3V, T < 60C
Power Consumption	Dormancy	-	-	0.8	W	At VCC = 3.3V, T < 60C
Power Consumption	Measure	-	-	3.2	mW	At VCC = 3.3V, T < 60C
Temperature Characteristics
Resolution	Typical	-	0.01	-	C	-
Accuracy	Typical	-	0.3	-	C	-
Tolerance	Max	-	See Figure 3	-	C	-
Repeatable	-	-	0.1	-	C	-
Hysteresis	-	-	0.1	-	C	-
Response Time (63%)	5 - 30 C	-	-	-	s	-
Scope of Work	Extended	-40	-	80	C	-
Prolonged Drift	Normal	-	<0.1	-	C /yr	-
Absolute Maximum Ratings
VDD to GND	-	-0.3	-	5.5	V	-
Digital I/O Pins (SDA, SCL) to GND	-	-0.3	-	VDD+0.3	V	-
Input current per pin	-	-10	-	10	mA	-

Pin Definitions

Pin	Name	Color	Description
1	VDD	Red	Power supply (2.2V to 5.5V)
2	SCL	White	Serial Clock, Bidirectional Port
3	SDA	Yellow	Serial Data, Bidirectional Port
4	GND	Black	Ground

Dimensions

Refer to Figure 12 for outer dimensions (unit: mm, tolerance: 0.2 mm).

Communication Protocol

The AM2301B uses the standard IC protocol for communication.

2410311222_Adafruit-Industries-5181_C3664368.pdf

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