SKU: SENS-3845
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STMicroelectronics STTS22H Digital Temperature Sensor -40°C to +125°C ±0.5°C Accuracy Ultra-Low Power I²C 1.5~3.6V DFN-6

₹168.00 (Inclusive of all taxes)
Out of Stock

The STMicroelectronics STTS22H is a high-accuracy, ultra-low-power digital temperature sensor in a compact DFN-6 package. Operating from 1.5V to 3.6V with an I²C/SMBus 3.0 interface, it provides precise thermal monitoring from -40°C to +125°C, making it ideal for battery-powered IoT devices, wearables, and portable electronics.

Features

  • High accuracy of ±0.5°C from -10°C to +60°C
  • Ultra-low power consumption: 1.75 µA in one-shot mode
  • Wide supply voltage range: 1.5V to 3.6V
  • I²C/SMBus 3.0 interface with programmable thresholds and interrupt
  • Compact UDFN-6 package (2.0 x 2.0 x 0.50 mm)

Out of stock

Description

The STTS22H integrates a precision bandgap temperature sensor, a 16-bit sigma-delta ADC, and digital signal processing into a single chip. Factory calibrated and NIST traceable, it delivers reliable temperature readings without requiring user calibration. The sensor supports multiple operating modes, including one-shot, freerun, and low output data rate (ODR), allowing designers to optimize the balance between measurement speed and power consumption for their specific application.

Featuring programmable high and low temperature thresholds with an interrupt (ALERT) output pin, the STTS22H enables efficient system-level thermal management. Its robust I²C interface supports clock speeds up to 1 MHz and offers selectable addresses for bus flexibility. With an ESD protection of 2 kV (HBM) and a wide operating temperature range, this sensor is engineered for reliable performance in demanding and space-constrained environments.

Key Features

  • High-precision digital temperature sensing with ±0.5°C accuracy in the critical range.
  • Ultra-low current draw: 1.75 µA (one-shot), 0.5 µA (power-down), ideal for battery-powered designs.
  • Factory-calibrated, NIST-traceable output eliminates the need for field calibration.
  • Flexible I²C/SMBus 3.0 interface with configurable addresses and programmable alert thresholds.
  • Multiple user-selectable output data rates (1 Hz to 200 Hz) and operating modes for power/performance tuning.
  • Robust 2 kV HBM ESD protection enhances reliability in handling and operation.
  • Minute UDFN-6 package (2 x 2 mm) enables integration into the most compact PCB layouts.

Applications

  • Thermal monitoring and management in battery-powered IoT sensor nodes and wearables.
  • Environmental sensing within portable consumer electronics like smartphones, tablets, and laptops.
  • Precision temperature logging in medical devices and diagnostic equipment.
  • System health monitoring and over-temperature protection in embedded computing and industrial controllers.
  • Smart thermostat and HVAC control modules requiring accurate ambient temperature feedback.

Technical Specifications

Manufacturer Part NumberSTTS22H
Sensor TypeDigital Temperature Sensor
Temperature Range-40°C to +125°C
Accuracy (-10°C to +60°C)±0.5°C
Accuracy (Full Range)±1.0°C
Resolution16-bit
Sensitivity0.01°C/LSB (100 LSB/°C)
Temperature Noise (RMS)0.02°C to 0.055°C
Supply Voltage1.5V to 3.6V
Supply Current (One-shot)1.75 µA
Supply Current (Active)120 µA to 180 µA
Power-down Current0.5 µA
Turn-on Time12 ms
InterfaceI²C / SMBus 3.0
Max I²C Clock Speed1 MHz
Selectable I²C Addresses2
Output Data Rate (ODR)1 Hz, 25 Hz, 50 Hz, 100 Hz, 200 Hz
Interrupt PinALERT / INT (Open-drain)
Threshold Range-39.68°C to 122.88°C
Threshold Step0.64°C
Operating ModesOne-shot, Freerun, Low ODR
PackageUDFN-6
Package Dimensions2.0 x 2.0 x 0.50 mm
ESD Protection (HBM)2 kV

Frequently Asked Questions

What is the operating voltage range for the STTS22H sensor?

The STTS22H operates from a supply voltage of 1.5V to 3.6V. This wide range makes it directly compatible with single-cell Li-ion batteries and common 3.3V microcontroller logic levels without requiring a level shifter.

How do I communicate with the STTS22H, and what is its I²C address?

Communication is via a standard I²C/SMBus 3.0 interface. The sensor supports up to two selectable I²C addresses, which are configured via the SA0 pin. The default addresses are typically 0x3C (write) and 0x3D (read), but please consult the datasheet for the specific configuration of your module.

What is the difference between one-shot and freerun operating modes?

In one-shot mode, the sensor performs a single temperature conversion and then returns to a low-power standby state, minimizing average current consumption. Freerun mode continuously performs conversions at a selected output data rate (1-200 Hz), providing real-time data but consuming more power.

Can the STTS22H trigger an interrupt based on temperature?

Yes. The sensor features a programmable high/low temperature threshold function. The open-drain ALERT/INT pin can be configured to assert when the measured temperature exceeds or falls below these user-defined limits, allowing for efficient system-level thermal management without constant polling.

Is the STTS22H sensor calibrated, and what is its accuracy?

Yes, the STTS22H is factory calibrated and provides NIST-traceable output. Its specified accuracy is ±0.5°C within the -10°C to +60°C range and ±1.0°C across the full -40°C to +125°C operating range, eliminating the need for user calibration in most applications.

Package Includes

  • 1 x STMicroelectronics STTS22H Digital Temperature Sensor (UDFN-6 package)

Additional Information

Weight 0.005 kg
Dimensions 2 × 2 × 0.5 cm