Fermion: AHT20 Temperature and Humidity Sensor

The AHT20 is a high-precision but low-cost temperature and humidity sensor, which is equipped with an improved MEMS semiconductor capacitive humidity sensor element. It features a standard I2C interface and a wide voltage supply of 2V-5V. With the simple peripheral circuit, it performs stably even in harsh environments in the measuring range of -40℃ ~ ＋85℃. This sensor can be widely used for measuring the environmental temperature and humidity of home electronic equipment, the temperature and humidity of automobiles and more. Connection Example - Arduino

Features

* Digital output, I2C interface

* Excellent long-term stability

* Quick response and strong anti-interference ability

Specifications Module Parameters

* Operating Voltage: DC2V-5V

* Output Signal: I2C

* I2C Address: 0x38

* Dimension: 30mm×20.5mm/1.18×0.81"

AHT20 Chip Parameters Relative Humidity

* Resolution: 0.024 %RH

* Accuracy Error: ±2 %RH

* Repeatability: ±0.1 %RH

* Hysteresis: ±1 %RH

* Non-linear: ±0.1 %RH

* Response Time: 8S

* Operating Range: 0~100 %RH

* Long-term Drift: ＜0.5 %RH/yr

Temperature

* Resolution: 0.01℃

* Accuracy Error: ±0.3℃

* Repeatability: ±0.1℃

* Hysteresis: ±0.1℃

* Response Time: minimum 5S, maximum 30S

* Operating Range: -40℃~85℃

* Long-term Drift: ＜0.04℃/yr

Package Contents

* 1x Fermion: AHT20 Temperature and Humidity Sensor

* 1x 2.54mm 4-Pin Black Single-row Pin Header

Resources

* Product wiki

* DFRobot AHT20 Library

* Dimensions

* Circuit Diagram SCH

* 2D Dimensions

* 2D CADDimensions

* 3D STP

Pinout

Pin Function Description

VCC Positive Power Supply Power Supply: DC 2V~5V

GND Negative Power Supply --

SCL I2C Clock Line --

SDA I2C Data Line --