SKU: TH2067
Adafruit MCP9808 High Accuracy I2C Temperature Sensor Breakout is a precision digital temperature sensor board designed for reliable ambient temperature measurement in embedded and maker projects. It offers typical accuracy of ±0.25°C across a wide -40°C to +125°C operating range, with a fine 0.0625°C resolution for detailed readings.
The sensor communicates over standard I2C, so it works with a wide range of microcontrollers and SBC-compatible development boards. On the back of the board, three address jumpers let you place up to 8 MCP9808 sensors on the same I2C bus without address conflicts.
This breakout is built in the STEMMA QT form factor, with dual JST-SH connectors for quick, solderless I2C hookup. These connectors are also compatible with SparkFun Qwiic ecosystems, making it easy to chain the sensor with other I2C boards and accessories. QT cable is not included.
Technical details for the Adafruit MCP9808 breakout.
| Brand | Adafruit |
|---|---|
| Sensor IC | MCP9808 |
| Interface | I2C |
| Voltage Range | 2.7V to 5.5V |
| Temperature Range | -40°C to +125°C |
| Typical Accuracy | ±0.25°C typical |
| Guaranteed Accuracy | 0.5°C max from -20°C to 100°C |
| Resolution | 0.0625°C |
| Typical Operating Current | 200 μA |
| Address Options | Up to 8 sensors on one I2C bus via address jumpers |
Basic wiring and practical usage information for the breakout board.
| Pin | Name | Function |
|---|---|---|
| 1 | VIN | Power and logic level input, 2.7V to 5.5V |
| 2 | GND | Ground reference |
| 3 | SCL | I2C clock line |
| 4 | SDA | I2C data line |
Each order includes one fully assembled and tested breakout PCB and a small strip of header. The header must be soldered to the board if you want to use it on a breadboard.
This breakout uses the MCP9808 digital temperature sensor, which has a typical accuracy of ±0.25°C across -40°C to +125°C. It also offers 0.0625°C temperature resolution.
Yes, it works with any microcontroller that supports standard I2C. A library is available for Arduino and CircuitPython.
The board supports 2.7V to 5.5V for both power and logic, so it can be used with either 3V or 5V logic systems. VIN should be powered at the same logic level used on the I2C lines.
Yes, the breakout has three address jumpers on the back, allowing up to 8 sensors on a single I2C bus without address collisions. The PCB also includes pull-down resistors for the address pins.
Yes, it uses the STEMMA QT form factor and the connectors are compatible with SparkFun Qwiic I2C connectors. This allows solderless connection and easy chaining with other compatible I2C boards.
Each order includes one fully assembled and tested breakout PCB and a small piece of header. A QT cable is not included, and the header must be soldered on if you want to use it with a solderless breadboard.
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