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SHT40-AD1B-R2

SENSHT40-AD1B-R2

Sensirion AG
Humidity, Temperature 0 ~ 100% RH I2C ±1.8% RH Surface Mount
Active25,490 in stock
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Overview

The SHT40-AD1B-R2 is a high-accuracy digital humidity and temperature sensor from Sensirion's fourth-generation platform. It features a wide supply voltage range from 1.08V to 3.6V and communicates via a standard I2C interface in a compact 1.5mm x 1.5mm DFN package. This sensor is designed for high-volume applications where low power consumption and high reliability are critical.

Why Choose This Part

The SHT40 offers exceptional power efficiency with a typical measurement current of only 0.32mA and an idle current of 0.08 microamperes at room temperature. Its robust 4-WDFN package includes an exposed pad for improved thermal coupling, while integrated CRC checksums ensure data integrity in noisy environments.

Applications

Battery-Powered IoT Nodes
Utilizes the ultra-low 0.08 microampere standby current to maximize battery life in remote wireless sensing environments.
HVAC and Smart Home Systems
Provides precise climate control with +/-1.8% RH accuracy for residential and commercial thermostats.
Cold Chain Logistics
Monitors perishable goods across a wide operating temperature range of -40 to 125 degrees Celsius.
Industrial Process Control
Integrates into automation equipment requiring fast response times and integrated 16-bit digital output.

Key Specifications

Output 16b
Accuracy +/-1.8% RH
Output Type I2C
Sensor Type Humidity, Temperature
Mounting Type Surface Mount
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

Integration requires a standard I2C bus connected to the 4-pin DFN package; note that the AD1B variant uses the 0x44 I2C address. Engineers can evaluate the sensor using the SEK-SHT40-AD1B-Sensors evaluation kit or Sensirion's ControlCenter software. Driver support is widely available through Sensirion's GitHub repositories for C, Python, and Arduino environments.

Part of Sensirion SHT4x family » SHT40

SHT40 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Accuracy Output Type Package Voltage Stock
SHT40-AD1B-R2 (this part) +/-1.8% RH I2C WDFN-4 1.08V 25,490
SHT40-AD1B-R3 +/-1.8% RH I2C WDFN-4 1.08V 27,321
SHT40-BD1B-R3 +/-1.8% RH I2C UDFN-4 1.08V 11,300
SHT40-AD1F-R2 +/-1.8% RH I2C WDFN-4 1.08V 12,260
SHT40I-HD1B-R2 +/-2.5% RH I2C WDFN-4 4.5V 868
SHT40I-HD1F-R2 +/-2.5% RH Analog Voltage WDFN-4 4.5V 2,147
SHT40-BD1B-R2 +/-1.8% RH I2C UDFN-4 1.08V 223

Also Consider

SHT31-DIS-B SENSensirion AG - An older industry-standard alternative with a larger footprint and different pinout for legacy designs.
SHT40-AD1F-R2 SENSensirion AG - Identical electrical specs but includes a patented PTFE membrane for protection against dust and water splash.
BME280 Bosch Sensortec - A combined sensor that adds barometric pressure sensing to humidity and temperature monitoring.

Categories

Sensors > Humidity Sensors