SmartElex STTS22H Temperature Sensor Module
Overview
The SmartElex STTS22H Temperature Sensor Module is a high-accuracy, ultra-low-power digital temperature sensor breakout based on the STMicroelectronics STTS22H IC.
Measures ambient temperature only
Provides fully calibrated digital output via I2C
Designed for precision sensing and low-power embedded systems
Working Principle
Uses bandgap-based temperature sensing
Internal signal chain:
Temperature analog signal
ADC conversion digital value
On-chip processing provides:
Linearized output
Temperature-compensated readings
No external calibration required (factory calibrated)
Measurement Characteristics
iC to +125C
Accuracy: 0.5C (10C to +60C typical range)
High accuracy suitable for precision monitoring applications
Electrical Characteristics
Operating Voltage: 1.5V 3.6V
Typical Supply: 3.3V
Ultra-low current:
~1.75 A (one-shot mode)
Optimized for battery-powered and IoT devices
Communication Interface
Protocol: I2C (digital)
Default Address: 0x3C
Selectable Addresses:
0x3C, 0x3E, 0x38, 0x3F
Supports multiple sensors on same I2C bus
Operating Modes
Free-running mode (continuous measurement)
One-shot mode (singleing rate)
Allows optimization between:
Power consumption
Measurement speed
Performance Characteristics
Output Data Rate (ODR): configurable (down to 1 Hz)
High stability and repeatability
Fast digital response
Internal Features
Integrated temperature sensing element
High-resolution ADC
Digital signal processing unit
Factory calibration memory
Interrupt system for threshold alerts
Functional Capabilities
Continuous temperature monitoring
Threshold-based alert generation
Low-power periodic sensing
Output Characteristics
Type: Digital temperature data (I2C)
Provides:
Direct temperature value (C)
No external ADC required
letrong>I2C pull-up resistors (2.2k)
Connector-based interface (Qwiic / PicoBlade depending on version) Address selection via jumpers
Key Technical Features
High accuracy (0.5C)
Ultra-low power consumption
Wide temperature range
Multiple I2C addresses
Configurable sampling modes
Built-in interrupt support
Factory calibrated output
Advantages
No calibration required
Very low power ideal for IoT
High precision compared to basic sensors
Easy integration via I2C
Limitations
Measures temperature only (no humidity/pressure)
Accuracy depends on:
Placement
Thermal coupling with environment
Requires proper PCB layout for best precision
Technical Summary
The STTS22H module is a
Delivers high accuracy with ultra-low power
Provides direct digital output via I2C
Is optimized for battery-powered and embedded applications
Compared to basic sensors (like LM35 or DHT series):
Much higher accuracy
Lower power consumption
Fully digital (no analog noise issues)</