AHT20

The AHT20 is a compact, high-precision digital temperature and humidity sensor from ASAIR. It features an I²C interface, operates at 1.8V–5.5V, and provides calibrated digital outputs.
### Key Features:
- Accuracy: ±0.3°C (temperature), ±2% RH (humidity).
- Range: -40°C to +85°C (temp.), 0–100% RH (humidity).
- Low Power: 0.96μA in sleep mode.
- Fast Response: <8s for humidity measurements.
### Applications:
- HVAC systems
- Weather stations
- Smart home devices
- IoT sensors
The AHT20 is an improved version of the AHT10, offering better stability and lower power consumption. It’s widely used for environmental monitoring due to its reliability and ease of integration with microcontrollers like Arduino and ESP32.
For more details, refer to the datasheet or manufacturer documentation.

Equivalent products to the AHT20 chip include:
- SHT30 (Sensirion) – Higher accuracy, similar size.
- BME280 (Bosch) – Combines temp, humidity, and pressure sensing.
- HTU21D (TE Connectivity) – Comparable performance, I²C interface.
- SHTC3 (Sensirion) – Low-power alternative with good accuracy.
- HDC1080 (TI) – Integrated temp and humidity sensor.
These alternatives offer similar functionality, varying in accuracy, power consumption, and additional features. Choose based on specific project needs.

The AHT20 is a compact, high-precision digital humidity and temperature sensor with the following key features:
- Measurement Range: Humidity (0–100% RH), Temperature (-40°C to +85°C).
- Accuracy: ±2% RH (humidity), ±0.3°C (temperature).
- Interface: I²C (default address 0x38), with a supply voltage of 2.0–5.5V.
- Low Power: Typical 0.25µA in sleep mode, 80µA during measurement.
- Fully Calibrated: Factory-calibrated, no additional calibration needed.
- Fast Response: Humidity response time of 8s (tau 63%).
- Robust Design: Resistant to contaminants like dust and condensation.
- Compact Size: 3×3×1mm DFN package, suitable for space-constrained applications.
Ideal for HVAC, IoT, and environmental monitoring due to its reliability and low power consumption.

The AHT20 is a digital humidity and temperature sensor manufactured by ASAIR, a Chinese company specializing in environmental sensing solutions. ASAIR focuses on producing high-precision, low-power sensors for applications like IoT, smart home devices, and industrial monitoring. The company is known for its cost-effective and reliable MEMS-based sensors, with the AHT20 being a popular choice for its accuracy and compact design. ASAIR operates primarily in the domestic Chinese market but also serves global customers.

The AHT20 is a digital humidity and temperature sensor commonly used in:
1. HVAC Systems – Monitoring and controlling indoor climate.
2. Weather Stations – Measuring environmental conditions.
3. Smart Home Devices – Enhancing automation (e.g., thermostats, air purifiers).
4. Industrial Automation – Process and equipment monitoring.
5. Agriculture – Greenhouse and soil condition tracking.
6. Consumer Electronics – Wearables and appliances.
7. Automotive – Cabin climate control.
Its compact size, low power consumption, and I²C interface make it ideal for embedded applications.

The AHT20 is a digital humidity and temperature sensor typically available in a DFN (Dual Flat No-leads) package, specifically DFN-6 (2.5×2.5×0.9mm). This compact, surface-mount package is designed for space-constrained applications, offering reliable performance with minimal footprint. It includes a protective cover for environmental resistance.