7Semi SHT41 Temperature & Humidity Sensor Breakout with I2C Qwiic Interface

Overview

The 7Semi SHT41 Breakout is a high-precision digital temperature and humidity sensor module based on the Sensirion SHT41 sensor.

• Measures relative humidity and temperature

• Uses fully calibrated digital output (I2C)

• Integrates Qwiic connector for plug-and-play interfacing

It belongs to the SHT4x series, known for high accuracy, low power, and long-term stability.

Working Principle

• Uses CMOSens technology (Sensirion) combining:

  • Capacitive humidity sensing

  • Bandgap temperature sensing

   

• Internal ADC converts signals 16-bit digital output

• Factory calibration ensures:

  • Linearized output

  • No external calibration required

   

Measurement Crature

• Range: 40C to +125C

• Accuracy: 0.2C (typical)

Humidity

• Range: 0% to 100% RH

• Accuracy: 1.5% to 1.8% RH

Resolution

• 16-bit digital output

Electrical Characteristics

• Supply Voltage:

  • Core: 1.08V 3.6V

  • Breakout: typically 3.3V5V compatible

   

• Current Consumption:

  • Active: ~0.45 mA

  • Ultra-low power modes available

   

Suitable for battery-powered IoT systems

Communication Interface

• Protocol: I2C (digital)

• Connector: Qwiic (4-pin, plug-and-play)

• Supports:

  • Multiple I2C addresses

  • Fast and reliablei>Response Time: ~8 seconds (63%)

  • High repeatability and stability

  • Resistant to environmental drift

   

  Internal Architecture

  • Capacitive humidity sensing element

  • Temperature sensor

  • Integrated ADC (16-bit)

  • Digital signal processing unit

  • Calibration memory

   

  Functional Behavior

  • Measures:

    • Ambient temperature

    • Relative humidity

     

  • Outputs:

    • Fully processed digital data

     

  • No need for:

    • External ADC

    • Calibration routines

     

   

  Key Technical Features

  • High accuracy (0.2C, 1.5% RH)

  • Wide operating range

  • Ultra-low power consumption

  • Fully calibrated digital output

  • I2C + Qwiic interface

  • Compact and lightweight design

  • Long-term stability with minimal drift

   

  nts across wide environmental conditions

• Easy integration due to plug-and-play Qwiic system

• Suitable for precision environmental monitoring

Limitations

• Moderate response time (~8s)

• Sensitive to:

  • Condensation

  • Direct water exposure

   

• Requires proper placement for accurate readings

Technical Summary

The SHT41 breakout is a high-accuracy environmental sensor module that:

• Provides precise temperature and humidity data

• Uses advanced CMOS sensing + digital processing

• Is optimized for low-power and embedded systems