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    Parts    Sensirion SHT4x Family    SHT40    SHT40I-BD1B-R3
SHT40I-BD1B-R3

SENSHT40I-BD1B-R3

Sensirion AG
Humidity, Temperature 0 ~ 100% RH I2C ±2% RH 4 s Surface Mount
Active12,446 in stock
Datasheet Digi-Key Compare Prices

Overview

The SHT40I-BD1B-R3 is a high-precision digital humidity and temperature sensor specifically designed for industrial applications. It features a wide supply voltage range of 2.3V to 5.5V and provides 16-bit resolution over a full 0 to 100% relative humidity range. This sensor is housed in a compact 4-pin UDFN package and communicates via a standard I2C interface.

Why Choose This Part

The SHT40I offers a robust industrial-grade design with a supply current of only 21 microamps at a 1 Hz measurement rate, making it ideal for low-power deployments. Its integrated heater allows for self-decontamination in high-humidity environments, and the 1.5mm x 1.5mm footprint minimizes PCB area requirements.

Applications

Industrial Process Control
Monitoring ambient conditions in manufacturing environments where a wide operating temperature of -40 to 125 degrees Celsius is required.
HVAC Systems
Integrated humidity and temperature sensing for smart climate control and building automation with high accuracy requirements.
Climate Monitoring
Utilizing the 4-second response time and low power consumption for battery-powered data logging in harsh environments.

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 evaluate this sensor, engineers can use the Sensirion SEK-SHT4x evaluation kit which connects directly to a PC. For firmware development, the sensor uses a standard I2C protocol at address 0x45; numerous C and C++ libraries are available for integration with common microcontrollers.

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
SHT40I-BD1B-R3 (this part) +/-2% RH I2C 4 s UDFN-4 2.3V 12,446
SHT40-AD1B-R2 +/-1.8% RH I2C — WDFN-4 1.08V 27,345
SHT40-AD1B-R3 +/-1.8% RH I2C 4 s WDFN-4 1.08V 24,423
SHT40I-HD1F-R2 +/-2.5% RH Analog Voltage 4 s WDFN-4 4.5V 2,147
SHT40-BD1B-R3 +/-1.8% RH I2C 4 s UDFN-4 1.08V 11,300
SHT40-AD1F-R2 +/-1.8% RH I2C 4 s WDFN-4 1.08V 12,260
SHT40-CD1B-R3 +/-1.8% RH I2C 4 s UDFN-4 1.08V 15,168
SHT40I-HD1B-R2 +/-2.5% RH I2C 4 s WDFN-4 4.5V 868
SHT40-AD1P-R2 +/-1.8% RH I2C 6 s UDFN-4 1.08V 6,395
SHT40-BD1B-R2 +/-1.8% RH I2C 4 s UDFN-4 1.08V 223
SHT40-BD1F-R2 +/-1.8% RH I2C 4 s WDFN-4 1.08V —

Also Consider

SHT41-AD1B-R2 SENSensirion AG - Provides higher accuracy tolerances for applications requiring tighter environmental monitoring.
HDC2010 TITexas Instruments - An alternative low-power digital humidity sensor with integrated heating elements and comparable I2C functionality.