AHT20-F High-Precision Miniaturized Digital Humidity Temperature Sensor For Consumer Electronics Industrial Automation
1. Core Product Features:
- High Measurement Accuracy: Delivers exceptional precision across typical operating ranges—humidity accuracy of ±2% RH (at 25℃, 20%-80% RH) and temperature accuracy of ±0.3℃ (at 25℃), ensuring reliable data for critical applications.
- Wide Detection Range: Adapts to diverse environmental conditions with a humidity measurement range of 0%-100% RH and a temperature measurement range of -40℃ to +85℃.
- Low Power Consumption: Features ultra-low power design—only 2.7μA in sleep mode and 70μA during active measurement (typical values at 3.3V), ideal for battery-powered devices (e.g., portable weather stations, smart wearables).
- Compact SMD Package: Utilizes a small SMD (Surface Mount Device) package (3mm × 3mm × 1.0mm), saving PCB space and simplifying automated assembly in high-volume production.
- Digital I2C Interface: Communicates via the industry-standard I2C bus (supporting 100kHz standard mode and 400kHz fast mode), enabling direct connection to microcontrollers (MCUs) like Arduino, STM32, and ESP32 without complex signal conversion.
- Built-in Self-Calibration: Equipped with on-chip factory-calibrated coefficients, eliminating the need for manual calibration by users and ensuring consistent performance across batches.
- Stable Long-Term Performance: The sensing element is protected by a robust encapsulation, resisting interference from dust, oil, and common chemicals, resulting in low drift and a long service life (typical 5 years under normal operating conditions).
2. Typical Applications:
- Consumer Electronics: Smart home devices (e.g., smart thermostats, humidifiers, air purifiers), wearable devices (e.g., fitness trackers, smart watches), and refrigerators (to monitor internal humidity/temperature).
- Industrial Automation: HVAC (Heating, Ventilation, and Air Conditioning) systems, warehouse environmental monitoring (for food, pharmaceuticals, or electronic components), and printing/packaging process control.
- Medical Equipment: Medical refrigerators, incubators, and wearable health monitors (to ensure stable environmental conditions for drugs or patient care).
- Agriculture & Horticulture: Greenhouse environmental monitoring (to optimize humidity/temperature for crop growth) and soil moisture-temperature integrated detection systems.
- Automotive Electronics: In-car air quality monitoring systems and battery management systems (to prevent condensation damage to electronic components).
Parameter Category | Parameter Name | Specification |
Humidity Measurement | Measuring Range | 0% - 100% RH |
| Accuracy (25℃) | ±2% RH (20% - 80% RH); ±3% RH (0% - 20% RH, 80% - 100% RH) |
| Resolution | 0.024% RH |
| Repeatability | ±0.5% RH |
Temperature Measurement | Measuring Range | -40℃ - +85℃ |
| Accuracy (25℃) | ±0.3℃; ±0.5℃ (-20℃ - +60℃); ±1.0℃ (-40℃ - -20℃, +60℃ - +85℃) |
| Resolution | 0.01℃ |
| Repeatability | ±0.1℃ |
Electrical Characteristics | Supply Voltage | 2.2V - 5.5V DC |
| Operating Current (Active) | Typ. 70μA (3.3V, 25℃); Max. 100μA |
| Sleep Current | Typ. 2.7μA (3.3V); Max. 5μA |
| Communication Interface | I2C bus (100kHz standard mode / 400kHz fast mode) |
| I2C Slave Address | Default: 0x38 (7-bit address; configurable via software for multi-sensor setups) |
Mechanical & Environmental | Package Type | SMD (3.0mm × 3.0mm × 1.0mm) |
| Operating Temperature | -40℃ - +85℃ |
| Storage Temperature | -40℃ - +85℃ |
| Operating Humidity | 0% - 100% RH (non-condensing) |
Performance | Response Time (T63%) | Humidity: ≤8s; Temperature: ≤5s (at 25℃, 60% RH → 33% RH, 1m/s airflow) |
| Long-Term Drift (per year) | Humidity: ≤0.5% RH; Temperature: ≤0.1℃ |
| Service Life (typical) | 5 years (under normal operating conditions: 25℃, 40%-60% RH, no harsh chemicals) |
