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SHT41-AD1B-R2

SENSHT41-AD1B-R2

Sensirion AG
Humidity, Temperature 0 ~ 100% RH I2C ±1.8% RH 4 s Surface Mount
Active9,470 in stock

Overview

The SHT41-AD1B-R2 is a high-accuracy digital humidity and temperature sensor from Sensirion's fourth-generation SHT4x series. It offers a wide supply voltage range from 1.08V to 3.6V and communicates via a standard I2C interface with a fixed 0x44 address. This sensor is designed for high-volume applications where low power consumption and a compact 1.5mm x 1.5mm DFN footprint are critical.

Why Choose This Part

The SHT41 provides an excellent balance of accuracy and efficiency, featuring a typical relative humidity accuracy of +/-1.8%. Its extremely low power profile, including a measurement current as low as 320uA and a sleep current of 80nA, makes it ideal for energy-harvesting and mobile applications. The wide 1.08V to 3.6V operating range ensures compatibility with modern low-voltage microcontrollers.

Applications

HVAC Systems
Climate control and air quality monitoring in residential and commercial buildings.
Battery-Powered IoT Nodes
Environmental sensing in remote locations where the 80nA idle current extends battery life significantly.
Cold Chain Logistics
Monitoring perishable goods during transport with an accuracy of +/-1.8% RH.
Wearable Devices
Integration into fitness trackers or smart clothing due to its ultra-small 4-pin DFN package.

Key Specifications

Output 16b
Accuracy +/-1.8% RH
Output Type I2C
Sensor Type Humidity, Temperature
Mounting Type Surface Mount
Response Time 4 s
Humidity Range 0 ~ 100% RH
Package / Case 4-WDFN Exposed Pad
Voltage - Supply 1.08V ~ 3.6V
Operating Temperature -40degC ~ 125degC
Supplier Device Package 4-DFN (1.5x1.5)

Getting Started

Interface the sensor via the I2C bus using a pull-up resistor on the SCL and SDA lines. Engineers can use the Sensirion SEK-SHT4x evaluation kit for rapid prototyping with a PC. Software integration is simplified by Sensirion's C and Python drivers available on GitHub.

Also Consider

SHT40-AD1B-R2 SENSensirion AG - Lower cost alternative with slightly wider humidity accuracy tolerances for less demanding applications.