MCP9808 - high precision I2C temperature sensor - Adafruit 1782

Index: ADA-03144 EAN: 5903351249751

Module with digital thermometer MCP9808 operating in the range of -40 °C to 125 °C with an average accuracy of 0.25 C. It communicates via the I2C bus, it is powered with the voltage from 2.7 V to 5.5 V.

MCP9808 - high precision I2C temperature sensor - Adafruit 1782
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Manufacturer: Adafruit
Compatibility: Arduino Raspberry Pi


Module with digital temperature sensorMCP9808 equipped with a communications I2C interface (TWI). Pins are the popular goldpin connectors, to connect the sensor to the main module (e.g. Raspberry PiorArduino) viawires.


The product is compatible with Arduino

The manufacturer providessample codealong with the connection scheme for users ofArduino.





Pin Description
VDD Supply voltage in the range from 2.7 V to 5.5 V.
GND The ground of the system.
SCL Clock line of the I2C bus (installed resistor pulling-up 10 kΩ).
SDA The data line of the I2C bus (installed resistorpulling-up 10 kΩ).
ALERT The external interrupt of open collector type.
A0, A1, A2

Pins of address selection of I2C bus. Default adress is: 0x18. Indicating the high status on a single bit will lead to the change of address in accordance with patterns: 0x18 + A2 + A1 + A0.

For example, when indicating a high statusn on all bits, the address will be: 0x18 + 4 + 2 + 1.

When we indicate a high status only on A2 and A0, then: 0x18 + 4 + 1 = 0x1D.



  • Supply voltage: from 2.7 V to 5.5 V
  • Pins are working with logic of 3.3 V and 5 V
  • Measuring range: -40°C to 125°C
  • Accuracy: on average - 0.25 °C, maximum 0.5°C
  • Resolution: 8-bit ( 0,0625°C)
  • Communication interface: I2C (TWI)
  • Built-in resistors pulling-up the SCL and SDA 10 kΩ lines
  • The bus address: from 0x18 to 0x1F
  • Dimensions: 21 x 13 x 2 mm
  • Weight: approx. 1 g


The set includes:

  • Module with temperature sensor
  • Goldpin strap, pitch of 2.54 mm for self-soldering


Interface I2C
Sensor - Temperature to 125 °C
Sensor - Temperature accuracy +/- 0.25 °C
Sensor - Temperature from -40 °C - 120 °C

Same-day shipping

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  • All packages are being delivered by GLS Group courier and covered with insurance up to 1200 EUR.
  • You will receive a link to track your package and monitor the progress of delivery as soon as it is shipped.

Terms of delivery 

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Austria, Belgium, Croatia, The Czech Republic, Denmark, Germany, Netherlands, Poland, Slovakia 

  • Delivery time: 2-4 days
  • Delivery cost: from 4.18 EUR
  • Insurance: 1200 EUR
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Bulgaria, Estonia, France, Hungary, Italy, Latvia, Lithuania, Luxembourg, Portugal, Romania, San Marino, Slovenia

  • Delivery time: 2-5 days
  • Delivery cost: from 5.35 EUR
  • Insurance: 1200 EUR
GLS - zone 3

Finland, Greece, Ireland, Spain, Sweden 

  • Delivery time: 2-7 days
  • Delivery cost: from 7.67 EUR
  • Insurance: 1200 EUR

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Product reviews

MCP9808 - high precision I2C temperature sensor - Adafruit 1782


Average grade


Customers opinion
Accurate temperature sensor. Powered by 3.3v on the EPS32 platform together with the BMP280. Thanks to the possibility of addressing, several of the same modules can be connected and used in the weather station. 1 in a cage and the other next to the ground, 3 in full sun.
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