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Small green rectangular PCB with surface-mount sensor chip and header pins

Adafruit

Adafruit MCP9808 I2C Temperature Sensor ±0.25 °C Accuracy

SKU CH-PZ0Q-N6K5C MPN MCP9808

High-accuracy I²C temperature sensor with ±0.25 °C typical precision, 3 address pins for up to 8 devices on one bus, and 2.7 V to 5.5 V logic compatibility

  • Product typeSensors
  • ±0.25 °C typical accuracy for precise temperature readings
  • I²C digital interface simplifies connection to microcontrollers
  • Operates from 2.7 V to 5.5 V logic for broad compatibility
  • Three address pins allow up to eight sensors on one bus
  • Measures from -40 °C to +125 °C for wide-range sensing

High-Accuracy I2C Temperature Sensor

The Adafruit MCP9808 breakout board provides a digital temperature sensor with a typical accuracy of ±0.25 °C across a -40 °C to +125 °C range. It communicates over a standard I2C interface and operates on a 2.7 V to 5.5 V supply, making it suitable for a wide variety of microcontroller projects.

Suitable For Precision Multi-Sensor Setups

Engineers and hobbyists needing reliable temperature logging or thermal management will appreciate the 0.0625 °C resolution and the ability to chain up to eight sensors on one bus via three address pins. It is not suited for applications requiring a through-hole component or a different communication protocol such as 1-Wire.

±0.25 °C Typical Accuracy Decides Fit

The defining specification is the typical accuracy of ±0.25 °C, which determines whether this sensor meets the precision requirements of your design. If your project demands tighter tolerances or a different sensing range, you will need to evaluate alternative sensor models.

How it compares

Measured against everything we stock in Sensors, Transducers & Thermometers, at today’s prices. Recalculated every night.

Price $7.99
Cheaper than about 95% of the 255 comparable items (median $39.99).

Specifications

Product
Product typeSensors

Questions about this item

Which version of the MCP9808 breakout should I choose for my project?

The board is a single version with three address pins that let you run up to eight sensors on one I²C bus without address conflicts.

What does the ±0.25 °C typical accuracy mean once the sensor is installed?

Across the -40 °C to +125 °C range the sensor typically reads within a quarter of a degree of the true temperature, with a resolution of 0.0625 °C.

What interface does the MCP9808 use and what voltage range does it support?

It communicates over I²C and operates from 2.7 V to 5.5 V logic, so it works with both 3 V and 5 V microcontrollers.

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