The Adafruit TMP117 is a high-accuracy I2C temperature sensor from Texas Instruments, offering 16-bit resolution (0.0078°C) and up to ±0.1°C accuracy across the most common temperature ranges. It's ideal for applications where precise temperature monitoring is critical, such as thermostats, cold chain tracking, and environmental sensing.

The breakout board comes in the STEMMA QT form factor with onboard voltage regulation and level shifting for compatibility with both 3.3V and 5V microcontrollers. Built-in high/low temperature alerts with interrupt support let you trigger actions when thresholds are crossed, and the chip includes hardware support for NIST traceability.

Key Features

• ±0.1°C Accuracy – Maximum variation from –20°C to +50°C (see full accuracy table below)
• 16-Bit Resolution – 0.0078°C measurement resolution for fine-grained readings
• Wide Operating Range – Measures from –55°C to +155°C
• Temperature Alerts – Configurable high and low threshold alerts with interrupt output
• I2C Interface – Simple 2-wire connection, shareable with other I2C devices
• NIST Traceability Support – Hardware support for calibration traceability
• STEMMA QT / Qwiic Compatible – Solderless connectors for plug-and-play setup
• 3.3V and 5V Compatible – Onboard voltage regulation and level shifting

Accuracy by Temperature Range

• ±0.1°C (max) from –20°C to +50°C
• ±0.15°C (max) from –40°C to +70°C
• ±0.2°C (max) from –40°C to +100°C
• ±0.25°C (max) from –55°C to +125°C
• ±0.3°C (max) from –55°C to +150°C

Ideal For

• Precision thermostats and climate control
• Cold chain and asset tracking
• Environmental monitoring stations
• Gas and heat metering
• Lab and scientific temperature measurement

Package Contents

• 1× Adafruit TMP117 High Accuracy Temperature Sensor Breakout

Resources

• Adafruit TMP117 Learning Guide (Arduino & CircuitPython)
• Pinout Reference