SHT31 Humidity Sensor: Pinout, Datasheet and Advantages

UTMEL

Published: 01 September 2021 | Last Updated: 01 September 2021

12304

SHT31-DIS-B

SHT31-DIS-B

Sensirion

SENSOR HUMID/TEMP 5V I2C 2% SMD

Purchase Guide

SENSOR HUMID/TEMP 5V I2C 2% SMD

SHT31 is the next generation of Sensirion’s temperature and humidity sensors. This article mainly covers datasheet, pinout, features, advantages, and other details about SHT31.

CQRobot gave me this sensor featuring the SHT31 chip.  I install it on the Pi Zero W (with Raspbian) and read some values out in Python.

SHT31 Temperature/Humidity Sensor and Rasperry Pi Zero W - Test and Review (#127)

SHT31 Pinout

SHT31 PINOUT.png

Pinout


Pin Name Comments
1SDASerial data; input / output
2ADDRAddress  pin; input;
connect to either logic high or low, do not leave floating
3ALERTIndicates alarm condition;
output; must be left floating if unused
4SCLSerial clock; input / output
5VDDSupply voltage; input
6nRESETReset pin active low; input;
if not used it is recommended to be left floating;
can be connected to VDD with a series resistor of R ≥2 kΩ
7RNo electrical function;
to be connected to VSS
8VSSGround

Pinout Description



SHT31 CAD Model

Symbol

sht31 symbol.png

Symbol

Footprint

sht31 footprint.png

Footprint

3D Model

sht31 3d model.png

3D Model

SHT31 Description

SHT31 is the next generation of Sensirion’s temperature and humidity sensors. It builds on a new CMOSens® sensor chip that is at the heart of Sensirion’s new humidity and temperature platform. The SHT3x-DIS has increased intelligence, reliability, and improved accuracy specifications compared to its predecessor. Its functionality includes enhanced signal processing, two distinctive and user-selectable I2C addresses, and communication speeds of up to 1 MHz.


SHT31 Block Diagram

sht31 block diagram.png

Block Diagram

Specifications

Sensirion SHT31-DIS-B technical specifications, attributes, parameters and parts with similar specifications to Sensirion SHT31-DIS-B.
  • Type
    Parameter
  • Factory Lead Time
    4 Weeks
  • Mount

    In electronic components, the term "Mount" typically refers to the method or process of physically attaching or fixing a component onto a circuit board or other electronic device. This can involve soldering, adhesive bonding, or other techniques to secure the component in place. The mounting process is crucial for ensuring proper electrical connections and mechanical stability within the electronic system. Different components may have specific mounting requirements based on their size, shape, and function, and manufacturers provide guidelines for proper mounting procedures to ensure optimal performance and reliability of the electronic device.

    Surface Mount
  • Package / Case

    refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.

    DFN
  • Number of Pins
    8
  • Packaging

    Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.

    Cut Tape
  • Published
    2014
  • Part Status

    Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.

    Active
  • Max Operating Temperature

    The Maximum Operating Temperature is the maximum body temperature at which the thermistor is designed to operate for extended periods of time with acceptable stability of its electrical characteristics.

    125°C
  • Min Operating Temperature

    The "Min Operating Temperature" parameter in electronic components refers to the lowest temperature at which the component is designed to operate effectively and reliably. This parameter is crucial for ensuring the proper functioning and longevity of the component, as operating below this temperature may lead to performance issues or even damage. Manufacturers specify the minimum operating temperature to provide guidance to users on the environmental conditions in which the component can safely operate. It is important to adhere to this parameter to prevent malfunctions and ensure the overall reliability of the electronic system.

    -40°C
  • Output Type

    The "Output Type" parameter in electronic components refers to the type of signal or data that is produced by the component as an output. This parameter specifies the nature of the output signal, such as analog or digital, and can also include details about the voltage levels, current levels, frequency, and other characteristics of the output signal. Understanding the output type of a component is crucial for ensuring compatibility with other components in a circuit or system, as well as for determining how the output signal can be utilized or processed further. In summary, the output type parameter provides essential information about the nature of the signal that is generated by the electronic component as its output.

    Digital, I2C
  • Operating Supply Voltage

    The voltage level by which an electrical system is designated and to which certain operating characteristics of the system are related.

    3.3V
  • Interface

    In electronic components, the term "Interface" refers to the point at which two different systems, devices, or components connect and interact with each other. It can involve physical connections such as ports, connectors, or cables, as well as communication protocols and standards that facilitate the exchange of data or signals between the connected entities. The interface serves as a bridge that enables seamless communication and interoperability between different parts of a system or between different systems altogether. Designing a reliable and efficient interface is crucial in ensuring proper functionality and performance of electronic components and systems.

    I2C
  • Max Supply Voltage

    In general, the absolute maximum common-mode voltage is VEE-0.3V and VCC+0.3V, but for products without a protection element at the VCC side, voltages up to the absolute maximum rated supply voltage (i.e. VEE+36V) can be supplied, regardless of supply voltage.

    5.5V
  • Min Supply Voltage

    The minimum supply voltage (V min ) is explored for sequential logic circuits by statistically simulating the impact of within-die process variations and gate-dielectric soft breakdown on data retention and hold time.

    2.15V
  • Accuracy

    Accuracy in electronic components refers to the degree to which a measured value agrees with the true or accepted value. It evaluates the precision of a component in providing correct output or measurement under specified conditions. High accuracy indicates minimal deviation from the actual value, while low accuracy shows significant error in measurement. This parameter is crucial in applications where precise data is essential for reliable performance and decision-making.

    2 %
  • Response Time

    the time taken for a circuit or measuring device, when subjected to a change in input signal, to change its state by a specified fraction of its total response to that change.

    8 s
  • Sensor Type

    In electronic components, the parameter "Sensor Type" refers to the specific type of sensor technology used in a particular component to detect and measure physical phenomena such as light, temperature, pressure, motion, or proximity. Different sensor types utilize various principles and mechanisms to convert the detected input into an electrical signal that can be processed by the electronic component. Common sensor types include photodiodes, thermistors, accelerometers, and proximity sensors, each designed for specific applications and environments. Understanding the sensor type is crucial for selecting the right component for a given task and ensuring accurate and reliable sensing capabilities in electronic systems.

    Temperature
  • Height
    1mm
  • Length
    2.6mm
  • Width
    2.6mm
  • REACH SVHC

    The parameter "REACH SVHC" in electronic components refers to the compliance with the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) regulation regarding Substances of Very High Concern (SVHC). SVHCs are substances that may have serious effects on human health or the environment, and their use is regulated under REACH to ensure their safe handling and minimize their impact.Manufacturers of electronic components need to declare if their products contain any SVHCs above a certain threshold concentration and provide information on the safe use of these substances. This information allows customers to make informed decisions about the potential risks associated with using the components and take appropriate measures to mitigate any hazards.Ensuring compliance with REACH SVHC requirements is essential for electronics manufacturers to meet regulatory standards, protect human health and the environment, and maintain transparency in their supply chain. It also demonstrates a commitment to sustainability and responsible manufacturing practices in the electronics industry.

    No SVHC
  • RoHS Status

    RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.

    RoHS Compliant
  • Lead Free

    Lead Free is a term used to describe electronic components that do not contain lead as part of their composition. Lead is a toxic material that can have harmful effects on human health and the environment, so the electronics industry has been moving towards lead-free components to reduce these risks. Lead-free components are typically made using alternative materials such as silver, copper, and tin. Manufacturers must comply with regulations such as the Restriction of Hazardous Substances (RoHS) directive to ensure that their products are lead-free and environmentally friendly.

    Lead Free
0 Similar Products Remaining

SHT31 Features

  • Fully calibrated, linearized, and temperature compensated digital output

  • Wide supply voltage range, from 2.4 V to 5.5 V

  • I2C Interface with communication speeds up to 1 MHz and two user-selectable addresses

  • Typical accuracy of ±1.5 %RH and ±0.1 °C for SHT35

  • Very fast start-up and measurement time

  • Tiny 8-Pin DFN package


SHT31 Advantages

  • High reliability and long-term stability

  • Industry-proven technology with a track record of more than 15 years

  • Designed for mass production

  • High process capability

  • High signal-to-noise ratio



SHT31 Application Circuit

sht31 application circuit.png

Application Circuit

SHT11 vs. DHT11

  • Different humidity-sensitive parts

SHT11: The core components of SHT11 use humidity-sensitive capacitors, which have high costs and good stability.

DHT11: The core component of DHT11 adopts humidity sensitive resistor, which has low cost and poor stability.

 

  • Different contain

SHT11: SHT11 includes a humidity sensor and a temperature sensor made of energy gap material.

DHT11: DHT11 includes a humidity sensor and an NTC temperature measuring element, and is connected with a high-performance 8-bit single-chip microcomputer.

 

  • Different function

SHT11: SHT11 can provide temperature-compensated humidity measurement and high-quality dew point calculation functions.

DHT11: DHT11 can provide temperature-compensated humidity measurement values, but cannot provide high-quality dew point calculation functions.


SHT31 Package

sht31 package.png

sht31 package2.png

Package

SHT31 Manufacturer

Sensirion is the leading manufacturer of high-quality sensors and sensor solutions for the measurement and control of humidity, and gas and liquid flows.


Datasheet PDF

Download datasheets and manufacturer documentation for Sensirion SHT31-DIS-B.
Frequently Asked Questions

What is SHT31 used for?

SHT31 is a highly reliable, accurate, quick response, and integrated temperature & humidity sensor. The sensor (chip) used in the module is designed with Sensirion's CMOSens® technology. The chip is well-calibrated, linearized, and compensated for digital output.

What are the advantages of SHT31 temperature and humidity sensor?

It combines multiple functions and various interfaces (I2C, voltage output) and a friendly, wide operating voltage range (2.4 to 5.5V). These sensors are suitable for a variety of high-volume and small-volume applications.
SHT31-DIS-B

Sensirion

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