Location: Home Products Center Temperature and Humidity Sensor Chip
GXT311A/B
phone 189 2646 8515
High-Precision, Low-Power Digital Temperature Sensor 
Brand: Zhongke Yinhexin (Zhongke Galaxy Core) 
Temperature measurement range: -55℃ ~ +150℃ 
Typical accuracy: ±0.1℃ 
High resolution: 0.00390625℃@16bits 
Supply voltage: 1.4V ~ 5.5V 
Conversion time: 32ms 
Low power consumption: 40μA conversion current, 0.2μA shutdown current 
Digital output: SMBus and I2C interface compatible 
Applications: Portable battery-powered applications, power supply temperature monitoring, thermal protection for computer peripherals, laptops, battery management, constant temperature control, electromechanical equipment temperature monitoring, industrial control, test equipment, medical instruments
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Product Description
Introduction to GXT311
The GXT311 series is a family of high-precision, low-power digital temperature sensors, available in two models: GXT311A and GXT311B. They are suitable for temperature measurement in communication, computer, consumer electronics, environmental, industrial, and instrumentation applications. The GXT311H series offers a temperature measurement accuracy of ≤±0.3℃ within the normal operating range of -40℃ to +125℃, while the GXT311N series provides an accuracy of ≤±0.5℃ within the same range. All GXT311 series products feature excellent temperature linearity and support an extended temperature measurement mode, expanding the range to -55℃ to +150℃.
The GXT311 series operates with a rated supply voltage of 1.4V~5.5V and has a maximum quiescent current as low as 40µA during temperature measurement. It integrates a 16-bit ADC with a resolution down to 0.00390625℃.
The GXT311 series adopts a 3.00mm×3.00mm DFN-8 package and is compatible with SMBus and I2C interfaces. The GXT311A series can support up to 32 slaves on a single bus, while the GXT311B series can accommodate up to 16 slaves. All models in the GXT311 series are equipped with SMBus alert functionality. Additionally, the GXT311B provides an input pin for the host to reset the chip.


Applications of GXT311


  • Portable and battery-powered applications

  • Power supply temperature monitoring

  • Thermal protection for computer peripherals

  • Laptops

  • Battery management





  • Constant temperature control

  • Temperature monitoring of electromechanical equipment

  • Industrial control

  • Test equipment

  • Medical instruments


Product Features

  • Temperature measurement range: -55℃ ~ +150℃

  • Typical accuracy: ±0.1℃

  • High resolution: 0.00390625℃@16bits

  • Supply voltage: 1.4V ~ 5.5V

  • Conversion time: 32ms

  • Low power consumption: 40μA conversion current, 0.2μA shutdown current

  • Digital output: SMBus and I2C interface compatible

  • GXT311B supports reset input

  • All GXT311 series models feature SMBus alert function

  • Package information

Application Scenarios
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