Temperature & Humidity Sensor

Overview

The Sensirion SHT3x-DIS (SHT30) is a fully calibrated, linearized, and temperature-compensated digital output temperature and humidity sensor with standard I2C interface communication. Its high accuracy, low power consumption, and compact DFN package make it an ideal choice for environmental monitoring, smart home, and industrial control applications.

1. Product Overview

1.1 Key Features

• Fully calibrated digital output: Humidity accuracy ±2%RH, temperature accuracy ±0.2°C, no additional calibration required
• Linearization and temperature compensation: Sensor output has been linearized and temperature-compensated
• Low power design: Standby current of only 0.2µA, suitable for battery-powered scenarios
• Standard I2C interface: Supports up to 1MHz communication rate with two selectable slave addresses
• Wide supply range: 2.15V ~ 5.5V, compatible with various power supply systems
• Compact package: 8-Pin DFN package (2.5 × 2.5 × 0.9mm), saving PCB space

1.2 NE301 Application Scenarios

In the NE301 sensor expansion board, the temperature and humidity sensor serves as an environmental context sensor, providing environmental temperature and humidity metadata for each snapshot capture. This data is reported together with the captured images, helping backend analysis of environmental factors' impact on detection results (such as sensor accuracy changes under high-temperature and high-humidity conditions), and can also be used to determine whether the device's working environment is abnormal.

Application Scenario	Description
Environmental Monitoring	Attaches temperature and humidity data to snapshots for environmental trend analysis
Smart Home	Records environmental temperature and humidity changes, linking NE301 snapshot capture and air conditioning control
Industrial Control	Monitors production line environmental conditions, triggering alarm snapshots for abnormal temperature or humidity
Warehouse Management	Tracks warehouse environment changes to ensure storage environment compliance

2. Specifications

2.1 Basic Parameters

Parameter	Specification
Model	SHT3x-DIS (SHT30)
Manufacturer	Sensirion (Switzerland)
Type	Digital temperature and humidity sensor
Package	8-Pin DFN (2.5 × 2.5 × 0.9mm)
Supply Voltage	2.15V ~ 5.5V
Communication Interface	I2C (up to 1MHz)

2.2 Performance Parameters

Humidity Sensor

Parameter	Condition	Typical	Max	Unit
Accuracy (SHT30)	—	±2	—	%RH
Repeatability	Low	0.21	—	%RH
Resolution	—	0.01	—	%RH
Hysteresis	—	±0.8	—	%RH
Measurement Range	—	0~100	—	%RH
Response Time (τ63%)	—	86	—	s
Long-term Drift	—	<0.25	—	%RH/yr

Temperature Sensor

Parameter	Condition	Typical	Max	Unit
Accuracy (SHT30)	0~90°C	±0.2	—	°C
Repeatability	—	0.15	—	°C
Resolution	—	0.01	—	°C
Measurement Range	—	-40~125	—	°C
Response Time (τ63%)	—	>2	—	s
Long-term Drift	—	<0.03	—	°C/yr

Electrical Specifications

Parameter	Typical	Max	Unit
Supply Current (idle)	0.2	2.0	µA
Supply Current (measurement)	600	1500	µA
POR Rising Threshold	1.8	—	V
POR Falling Threshold	2.1	—	V

2.3 Operating Conditions

Parameter	Specification	Description
Recommended Operating Temperature	5°C ~ 60°C	Optimal accuracy range
Recommended Operating Humidity	20~80%RH	Non-condensing
Storage Temperature	-40°C ~ 125°C	Non-operating state

3. Pin Definition

The SHT30 uses an 8-Pin DFN package with the following pin definitions:

Pin	Name	Description
1	SDA	I2C serial data
2	ADDR	I2C address selection
3	ALERT	Temperature and humidity alarm output (open-drain)
4	SCL	I2C serial clock
5	VDD	Power supply input (2.15V ~ 5.5V)
6	nRESET	Reset pin (active low)
7	R	No electrical function (connect to VSS)
8	VSS	Ground

I2C slave address selection: When the ADDR pin is connected to logic low, the slave address is 0x44; when connected to logic high, the slave address is 0x45.

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Item	Information
Document Version	v1.0
Last Updated	2026-04-08