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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