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SHT40A-AD1B-R3

SENSHT40A-AD1B-R3

Sensirion AG
Humidity, Temperature 0 ~ 100% RH I2C ±2% RH 4 s Surface Mount
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Overview

The Sensirion SHT40A-AD1B-R3 is a high-accuracy digital humidity and temperature sensor. It features an I2C interface for easy integration and provides 16-bit output for both humidity and temperature measurements. Its compact 4-UDFN package and wide operating voltage range make it suitable for various embedded applications.

Why Choose This Part

Engineers benefit from the SHT40A-AD1B-R3's specified +/-2% RH accuracy and 16-bit resolution, ensuring precise environmental data. The I2C interface simplifies integration into microcontrollers, while its compact 4-UDFN package saves board space. Its low sleep current of 18 uA makes it suitable for power-sensitive applications.

Applications

Automotive Climate Control
Accurate humidity and temperature monitoring within vehicle cabins for comfort and defogging systems, leveraging its high operating temperature range.
HVAC Systems
Precise environmental sensing in heating, ventilation, and air conditioning units for optimal energy efficiency and air quality management.
Industrial Process Control
Monitoring humidity and temperature in manufacturing and storage environments to ensure product quality and operational stability.
Medical Devices
Environmental monitoring in patient care equipment, incubators, or sterilization units requiring reliable and accurate measurements.
Smart Home Devices
Integration into smart thermostats, weather stations, or air purifiers for localized environmental data collection.
Weather Stations
Outdoor and indoor weather monitoring, providing reliable humidity and temperature data for personal and professional use.

Key Specifications

Output 16b
Accuracy +/-2% RH
Output Type I2C
Sensor Type Humidity, Temperature
Mounting Type Surface Mount
Response Time 4 s
Humidity Range 0 ~ 100% RH
Package / Case 4-UDFN Exposed Pad
Voltage - Supply 2.3V ~ 5.5V
Operating Temperature -40degC ~ 125degC
Supplier Device Package 4-DFN (1.5x1.5)

Getting Started

To get started with the SHT40A-AD1B-R3, connect it to a microcontroller via its I2C interface. Example libraries and drivers are often available from Sensirion or the microcontroller vendor. Utilize standard I2C communication protocols to read the 16-bit humidity and temperature values, then apply the provided conversion formulas from the datasheet.

Also Consider

SHT31-DIS-B2.5KS SENSensirion AG - This is a popular alternative from Sensirion with similar I2C functionality, offering good accuracy and reliability in a larger DFN-8 package.
BME280 Bosch Sensortec - The BME280 adds barometric pressure sensing to humidity and temperature, providing a more comprehensive environmental monitoring solution via I2C or SPI.