This I2C digital temperature sensor is one of the more accurate/precise we've ever seen, with a typical accuracy of ±0.25°C over the sensor's -40°C to +125°C range and precision of +0.0625°C. They work great with any microcontroller using standard i2c. There are 3 address pins so you can connect up to 8 to a single I2C bus without address collisions. Best of all, a wide voltage range makes it usable with 2.7V to 5.5V logic! Unlike the DS18B20, this sensor does not come in a through-hole package so we placed this small sensor on a breakout board PCB for easy use. The PCB includes mounting holes and pull-down resistors for the 3 address pins. We even wrote a lovely little tutorial and library that will work with Arduino or CircuitPython. You'll be up and running in 15 minutes or less. Some quick specs: * Simple I2C control * Up to 8 on a single I2C bus with adjustable address pins * 0.25°C typical precision over -40°C to 125°C range (0.5°C guaranteed max from * -20°C to 100°C) * 0.0625°C resolution * 2.7V to 5.5V power and logic voltage range * Operating Current: 200 μA (typical) Revision History * As of August 24th, 2024 - we've updated this PCB with Adafruit Pinguin to make a lovely and legible silkscreen - You may get the new PCB or the older version with vector fonts - both are identical other than the fancy silkscreen. Specifications * Sensing Temperature: -40ºC ~ 125ºC * Accuracy: 0.25ºC typical * Voltage - Supply: 2.7V ~ 5.5V * Operating Temperature: -40ºC ~ 125ºC * Uses any I2C address from 0x18 thru 0x1F * 21mm x 13mm x 2mm * Weight: 0.9g Resources * Downloads and Tutorial https://elecena.pl/product/22711563/mcp9808-high-accuracy-i2c-temperature-sensor-breakout-board 2023-03-06 https://elecena.pl/product/22711563/mcp9808-high-accuracy-i2c-temperature-sensor-breakout-board 2023-12-27 https://elecena.pl/product/22711563/mcp9808-high-accuracy-i2c-temperature-sensor-breakout-board 2024-09-19 https://elecena.pl/product/22711563/mcp9808-high-accuracy-i2c-temperature-sensor-breakout-board 2024-11-29 https://elecena.pl/product/22711563/mcp9808-high-accuracy-i2c-temperature-sensor-breakout-board 2024-11-30 https://elecena.pl/product/22711563/mcp9808-high-accuracy-i2c-temperature-sensor-breakout-board 2025-11-28 https://elecena.pl/product/22711563/mcp9808-high-accuracy-i2c-temperature-sensor-breakout-board 2025-11-29