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    Parts    Sensirion SHT4x Family    SHT40    SHT40-AD1P-R2
SHT40-AD1P-R2

SENSHT40-AD1P-R2

Sensirion AG
Humidity, Temperature 0 ~ 100% RH I2C ±1.8% RH 6 s Surface Mount
Active6,395 in stock
Datasheet Digi-Key Compare Prices

Overview

The SHT40-AD1P-R2 is a high-accuracy digital humidity and temperature sensor from Sensirion's fourth-generation SHT4x series. It provides a 16-bit digital output over a standard I2C interface with a wide supply voltage range of 1.08V to 3.6V, making it ideal for battery-powered applications. This sensor offers a fast 6-second response time and maintains high precision across its full 0 to 100% RH operating range.

Why Choose This Part

This sensor features an industry-leading relative humidity accuracy of +/-1.8% and a compact 4-UDFN package for space-constrained designs. It includes an integrated heater for self-decontamination and allows for easy integration via a standard I2C address, ensuring long-term stability in demanding environments.

Applications

Battery-Powered IoT Nodes
Ultra-low power consumption and wide voltage range (down to 1.08V) extend the life of wireless environmental monitors.
HVAC Control Systems
Precise monitoring of indoor air quality and humidity for smart thermostat and ventilation control.
Cold Chain Logistics
Reliable temperature and humidity tracking for sensitive goods during transport and storage from -40degC to 125degC.
Industrial Automation
Robust environmental sensing in industrial environments requiring high accuracy and I2C digital integration.

Key Specifications

Output 16b
Accuracy +/-1.8% RH
Output Type I2C
Sensor Type Humidity, Temperature
Mounting Type Surface Mount
Response Time 6 s
Humidity Range 0 ~ 100% RH
Package / Case 4-UDFN Exposed Pad
Voltage - Supply 1.08V ~ 3.6V
Operating Temperature -40degC ~ 125degC
Supplier Device Package 4-DFN (1.5x1.5)

Getting Started

Connect the SHT40 to any MCU with an I2C peripheral using pull-up resistors on the SDA and SCL lines. For rapid prototyping, use the Sensirion SEK-SHT40-Sensors evaluation kit or standard Arduino libraries designed for the SHT4x family. Ensure the exposed pad is soldered correctly to the PCB for optimal thermal response and mechanical stability.

Part of Sensirion SHT4x family » SHT40

SHT40 Family

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

Part Number Accuracy Output Type Response Time Package Voltage Stock
SHT40-AD1P-R2 (this part) +/-1.8% RH I2C 6 s UDFN-4 1.08V 6,395
SHT40-AD1F-R2 +/-1.8% RH I2C 4 s WDFN-4 1.08V 13,226
SHT40-BD1B-R3 +/-1.8% RH I2C 4 s UDFN-4 1.08V 13,490
SHT40-AD1B-R3 +/-1.8% RH I2C 4 s WDFN-4 1.08V 16,564
SHT40-BD1B-R2 +/-1.8% RH I2C 4 s UDFN-4 1.08V 11,341
SHT40-CD1B-R3 +/-1.8% RH I2C 4 s UDFN-4 1.08V 13,798
SHT40I-HD1F-R2 +/-2.5% RH Analog Voltage 4 s WDFN-4 4.5V 2,147
SHT40-AD1B-R2 +/-1.8% RH I2C — WDFN-4 1.08V 9,656
SHT40I-BD1B-R3 +/-2% RH I2C 4 s UDFN-4 2.3V 12,446
SHT40I-HD1B-R2 +/-2.5% RH I2C 4 s WDFN-4 4.5V 868
SHT40-BD1F-R2 +/-1.8% RH I2C 4 s WDFN-4 1.08V —

Also Consider

SHT31-DIS-B SENSensirion AG - A widely used industry standard alternative with slightly different voltage requirements and footprint.
HDC2010 TITexas Instruments - Offers comparable low-power performance and accuracy in a WLCSP package for even tighter space constraints.