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TMP119 - high-precision temperature sensor ±0.03 °C - I2C - STEMMA QT / Qwiic - Adafruit 6482
An I2C temperature sensor with typical ±0.03 °C accuracy from 0 °C to 45 °C: the TMP119 measures with 0.0078 °C resolution and raises an alert when a set threshold is exceeded.
- 16-bit resolution, range from -55 °C to +155 °C
- STEMMA QT / Qwiic connectors, 3.3 V or 5 V logic
- Up to 2 sensors on one I2C bus
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Temperature measurement with ±0.03 °C accuracy
The Adafruit TMP119 is an I2C temperature sensor with a typical accuracy of ±0.03 °C from 0 °C to 45 °C and 16-bit resolution, that is 0.0078 °C per measurement step. It measures from -55 °C up to +155 °C and raises an alert when a set threshold is exceeded.
Texas Instruments, the chip manufacturer, recommends it for use in thermostats, cold chain tracking and gas and heat meters. The alert signal goes to the module's INT pin.
±0.03 °C
typical accuracy from 0 °C to 45 °C
0.0078 °C
16-bit measurement resolution
-55 °C to 155 °C
sensor operating range
0x48 / 0x49
I2C addresses, 2 sensors on the bus
Botland is an official distributor of Adafruit electronics. These dependable American solutions cover sensors, controllers, Arduino shields, educational systems, smart building and a wide range of accessories. The Botland range holds original Adafruit products only.
Accuracy across several temperature ranges
The manufacturer also gives the maximum accuracy, for each temperature range: ±0.08 °C from 0 °C to 45 °C, ±0.09 °C from -25 °C to +85 °C, ±0.12 °C from -40 °C to +85 °C, ±0.15 °C from -55 °C to +125 °C and ±0.2 °C from -55 °C to +150 °C. Typically it is even more accurate.
The TMP119 has the same software interface as the TMP117 sensor and differs only in the chip ID, so it works with the same libraries. The I2C lines have a level shifter, so the TMP119 module works with 3.3 V and 5 V logic, e.g. with Arduino or Raspberry Pi and Feather boards.
Is it right for you?
A good choice if:
- you need temperature measurement with accuracy better than ±0.1 °C
- you monitor a cold chain, a thermostat or a heat meter
- you want an alert when a temperature threshold is exceeded, without constant reads
Consider another option if:
- you want to connect up to 8 sensors on one bus: choose the MCP9808
Comparison of precision I2C temperature sensors
| TMP119 | TMP117 | MCP9808 | |
|---|---|---|---|
| Typical accuracy | ±0.03 °C (0 °C to 45 °C) | - | ±0.25 °C (-40 °C to 125 °C) |
| Max. accuracy | ±0.08 °C (0 °C to 45 °C) | ±0.1 °C (-20 °C to 50 °C) | ±0.5 °C (-20 °C to 100 °C) |
| Resolution | 0.0078 °C | 0.0078 °C | 0.0625 °C |
| Operating range | -55 °C to 155 °C | -55 °C to 155 °C | -40 °C to 125 °C |
| Sensors on one bus | 2 | - | 8 |
| See | this page | TMP117 | MCP9808 |
A "-" means this information is not given in the manufacturer's materials.
TMP119 module pinout
| Pin | Function |
|---|---|
| VIN | 3.3 V or 5 V power, the same as the microcontroller logic level |
| GND | power and logic ground |
| SCL | I2C clock, 3 V to 5 V level shifter, 10 kΩ pull-up resistor |
| SDA | I2C data, 3 V to 5 V level shifter, 10 kΩ pull-up resistor |
| INT | temperature alert or data ready, open drain |
| ADDR | low state: address 0x48, high state: address 0x49 |
| ADDR jumper | on the underside, soldered: address 0x49 |
| LED jumper | on the underside, cut: on LED disabled |
| On LED | green power LED |
Fun fact
Ready for NIST-traceable measurements
The TMP119 has hardware support for measurement traceability to NIST standards, the US national standards institute. Texas Instruments provides the NIST documents on request.
Frequently asked questions
How does TMP119 differ from TMP117?
They differ in accuracy: the TMP119 has a max. of ±0.08 °C from 0 °C to 45 °C, and the TMP117 ±0.1 °C from -20 °C to 50 °C. The interface is the same, only the chip ID differs.
How many sensors on one bus?
Two sensors. The ADDR pin or jumper changes the address of the second one on the bus from 0x48 to 0x49.
Does it work with 5 V Arduino?
Yes. The I2C lines have a level shifter, so the module works with both 5 V and 3.3 V logic, for example with Arduino, Raspberry Pi or Adafruit Feather development boards.
Kit contents
- 1 x TMP119 temperature sensor module
- 1 x 6-pin header strip for soldering
Technical specifications
| Parameter | Value |
|---|---|
| Chip | Texas Instruments TMP119 |
| Type | digital high-precision temperature sensor |
| Typical accuracy | ±0.03 °C (0 °C to 45 °C) |
| Max. accuracy | ±0.08 °C (0 °C to 45 °C), ±0.09 °C (-25 °C to 85 °C), ±0.12 °C (-40 °C to 85 °C), ±0.15 °C (-55 °C to 125 °C), ±0.2 °C (-55 °C to 150 °C) |
| Resolution | 16 bit, 0.0078 °C |
| Operating range | -55 °C to 155 °C |
| Alert | high and low temperature thresholds, INT pin (open drain) |
| Interface | I2C, STEMMA QT / Qwiic connectors |
| I2C address | 0x48 (0x49 after changing the ADDR state) |
| Power and logic | 3.3 V or 5 V |
| Manufacturer part number | 6482 |
| Manufacturer | Adafruit |
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Product information
This product is a component intended for further assembly or prototyping. It is not a finished product within the meaning of the product safety regulations.
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