GXTR3124

1 Key Specifications

Multi-channel Temperature Measurement: 1 Local Channel & 2 Remote Channels Temperature Range: -55 °C ~ +150 °C (Local & Remote Channels)

Temperature Accuracy: Local Channel: ±0.5 °C (-40 °C ~ +125 °C) Remote Channel: ±1 °C (-40 °C ~ +125 °C)

Package: 10-Pin MSOP Package Dimension: 3.00 mm × 3.00 mm Supply Voltage: 2.7 V ~ 5.5 V

Low Quiescent Current (@3.3 V, 27 °C): Local Channel: 230 µA Remote Mode: 630 µA Shutdown Mode: 2 µA

Resolution: 16 bits, 0.00390625 °C Digital Output: SMBus and I²C compatible

Remote Diode Features: Series resistance cancellation, η factor correction, beta detection with automatic compensation, open-circuit detection

2 Applications

• Servers, Processors, FPGAs
• Desktop and Notebook PCs
• Storage Area Networks (SAN)
• General Temperature Measurement:
  • Industrial Control
  • Test Equipment
  • Medical Instruments

3 Product Overview

GXTR3124 is a high-precision, low-power digital temperature sensor with SMBus and I²C interface. In addition to measuring its own local temperature, it can simultaneously monitor temperatures from up to two remote sensing diodes.

GXTR3124 integrates series resistance cancellation, programmable η factor correction, beta detection with automatic compensation, and programmable temperature limits, delivering a reliable high-precision and low-power temperature monitoring solution.

GXTR3124 is ideal for remote temperature sensing using on-chip NPN/PNP transistors in advanced-node server and processor devices. It supports compensation for PNP transistors configured in diode connection with beta values ranging from 0.09 to 21.36 to achieve high-accuracy temperature readings.

The typical temperature accuracy of the GXTR3124 local and remote channels is ±0.5 °C and ±1 °C respectively. All channels offer a temperature resolution of 0.00390625 °C and a measurement range of -55 °C ~ +150 °C. Operating from 2.7 V to 5.5 V, the GXTR3124 is available in a 10-pin MSOP 3 mm × 3 mm package for easy system integration.

Figure 1 GXTR3124 Typical Application Schematic

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