Adafruit
Adafruit TMP117 ±0.1°C High Accuracy I2C Temperature Sensor - STEMMA QT / Qwiic
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 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
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- NIST traceability
- A way of linking a measurement back to standards maintained by the US National Institute of Standards and Technology. For temperature sensing, it matters when you need documented confidence that readings can be compared to recognised measurement standards.
- Qwiic
- Qwiic is a plug-in connector system for I2C devices that uses small 4-pin cables, so you can connect compatible sensors without soldering. It matters because your controller or adapter also needs Qwiic, or you will need a cable or breakout to wire it up.
- STEMMA
- A plug-and-cable connection system used on some maker electronics boards to make wiring simpler. If a product uses STEMMA, you need the matching cable or connector type to plug it in without soldering.
- STEMMA QT
- A small plug-in connector system for I2C boards that lets you connect compatible sensors and controllers without soldering. It matters because it can make wiring faster and less error-prone, especially when adding several small modules to a project.
- TMP117
- A related Texas Instruments digital temperature sensor chip with a similar firmware interface to the TMP119. It matters because software written for the TMP117 may be adaptable to this board, but code may still need to check the chip identifier.
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