DFRobot - Fermion: MCP9808 High Accuracy Temperature Sensor (Breakout, I2C)

Fermion: MCP9808 High Accuracy I2C Temperature Sensor delivers precision thermal monitoring for embedded electronics, environmental control, and industrial equipment. Compared with many common temperature sensors such as DS18B20 or LM35, this digital sensing module provides significantly higher measurement accuracy and fine resolution down to +0.0625°C. The compact breakout integrates Microchip’s MCP9808 sensor and communicates through an I2C interface, enabling seamless integration with popular development platforms and data‑logging systems. Wide operating coverage from -40°C to +125°C allows reliable measurement in refrigeration systems, computing hardware, consumer electronics, and other environments requiring precise thermal monitoring.

Figure: Fermion MCP9808 High Accuracy I2C Temperature Sensor

Exceptional Measurement Accuracy

High‑precision thermal sensing is achieved with a typical accuracy of ±0.25°C and a maximum error of ±0.5°C across most of the operating range. Such performance enables accurate environmental monitoring and stable thermal management in computing equipment or sensitive electronics. The digital temperature sensing board also supports measurement resolution settings down to +0.0625°C, allowing detailed temperature trend analysis and refined control algorithms in monitoring or automation systems.

Programmable Alerts and Power Modes

User‑configurable registers allow flexible thermal event management. The intelligent sensing board supports programmable alert thresholds, critical temperature limits, and selectable alert window settings. When measured temperature exceeds defined boundaries, an alert signal is generated for system response. Configurable output polarity and interrupt or comparator operation modes enable easy integration into microcontroller‑based monitoring systems, while optional shutdown or low‑power modes reduce energy consumption during standby operation.

Flexible I2C Addressing and System Integration

An I2C communication interface with address configuration pins enables multiple sensing units to operate on the same bus. Address pins A0, A1, and A2 allow flexible configuration when deploying multi‑sensor arrays for distributed temperature monitoring. The compact Fermion‑series breakout uses a 2.54 mm connector layout, simplifying wiring in prototyping environments, embedded control boards, or modular electronics projects that require reliable digital temperature measurement.

Figure: Connection diagram

Reliable accuracy, programmable alert functions, and flexible I2C addressing make this digital temperature monitoring module suitable for multi‑zone thermal control systems, server hardware monitoring, refrigeration equipment, and embedded electronics projects requiring stable and precise temperature measurement.

• High-temperature detection accuracy ±0.25°C/±0.5°C (typical/maximum)
• Wide temperature detection range from -40°C to +125°C

• Industrial Freezers and Refrigerators
• Food Processing
• Personal Computers and Servers
• PC Peripherals
• Consumer Electronics

• Operating Voltage: 2.7~5.5V
• Operating Current: 200μA (typical)
• Accuracy:
         ±0.25°C (typical) from -40°C to +125°C
         ±0.5°C (maximum) from -20°C to 100°C
         ±1°C (maximum) from -40°C to +125°C
• User-Selectable Measurement Resolution: +0.5°C, +0.25°C, +0.125°C, +0.0625°C
• User-Programmable Temperature Alert: Temperature Threshold Alert, Critical Temperature Alert
• Communication Interface: I2C (2.54mm Breakout)
• Dimension: 18.5×23mm/0.73×0.91"
• Mounting Hole Size: 2mm
• Mounting Hole Pitch: 18mm

• Fermion: MCP9808 High Accuracy I2C Temperature Sensor x1