GXT117

1 Key Specifications

Temperature Accuracy:

< ±0.10 °C (-20 °C ~ +50 °C)

< ±0.15 °C (-40 °C ~ +70 °C)

< ±0.20 °C (-40 °C ~ +100 °C)

< ±0.25 °C (-55 °C ~ +125 °C) 

< ±0.30 °C (-55 °C ~ +150 °C)

• Operating Temperature Range: -55 °C ~ +150 °C
• Low Power Consumption: 3.5 µA (1 Hz continuous conversion mode / no averaging) 18 µA (1 Hz continuous conversion mode / 8-sample averaging) 50 nA (shutdown mode)
• Supply Voltage: 1.7 V ~ 5.5 V
• Temperature Resolution: 16 bits / 0.0078125 °C (1 LSB)
• Programmable temperature alarm thresholds, averaging sample count, and digital temperature offset correction
• SMBus and I²C compatible

Package Information

2 Applications

• Electronic thermometers
• Wearable temperature sensing devices
• Cold-chain temperature monitoring
• Temperature transmitters
• RTD replacement: PT100, PT500, PT1000

3 Product Overview

GXT117 is a high-precision, low-power digital temperature sensor delivering 16-bit temperature readings with 0.0078125 °C per LSB. It achieves an accuracy of ±0.1 °C across the -20 °C to +50 °C range. The device supports SMBus and I²C protocols, and up to four GXT117 sensors with distinct slave addresses can share a single communication bus.

The low-power design of GXT117 minimizes self-heating effects that degrade temperature measurement accuracy. It operates from 1.7 V to 5.5 V. In 1 Hz continuous conversion mode without averaging, its typical supply current is only 3.5 µA.

GXT117 provides a single-chip digital alternative to platinum RTD temperature measurement. Its accuracy matches Class AA RTDs while consuming far less power. It eliminates many complexities associated with RTD circuits, including precision voltage references, matched PCB traces, complex algorithms and post-calibration, greatly simplifying system design.

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