7Semi MAX31855 Thermocouple Amplifier Breakout

The 7Semi MAX31855 Thermocouple Amplifier Breakout is a compact and reliable temperature sensing module designed for interfacing K-type thermocouples with microcontrollers and embedded systems. Built around the MAX31855 thermocouple-to-digital converter, the module converts low-level thermocouple signals into high-resolution digital temperature data, eliminating the need for complex analog signal conditioning circuits. Its SPI interface enables seamless integration with Arduino, ESP32, STM32, Raspberry Pi, and other development platforms.

Designed for accurate temperature monitoring in industrial, laboratory, automation, and embedded applications, the module incorporates integrated cold-junction compensation to improve measurement accuracy and stability. The onboard circuitry automatically compensates for ambient temperature variations at the thermocouple connection point, ensuring reliable and repeatable temperature measurements under varying environmental conditions.

The breakout also includes built-in fault detection features capable of identifying open thermocouples and short-circuit conditions, helping improve system reliability and simplify troubleshooting. With its compact footprint, easy-to-use SPI interface, and robust design, the module is suitable for process monitoring, equipment diagnostics, environmental sensing, laboratory instrumentation, HVAC systems, and educational projects. The PCB itself is rated for operation from -40°C to +80°C.

Features

• Built around the MAX31855 thermocouple-to-digital converter, the module directly converts thermocouple signals into digital temperature data, eliminating the need for complex analog signal conditioning circuits.

• Provides high-resolution temperature measurements with 14-bit ADC conversion and 0.25°C resolution, enabling accurate and reliable thermal monitoring for embedded and industrial applications.

• Integrated cold-junction compensation automatically corrects for ambient temperature variations at the thermocouple connection point, improving overall measurement accuracy and stability.

• Advanced fault detection circuitry can identify open thermocouples, short circuits to ground, and short circuits to the power supply, helping improve system reliability and simplify troubleshooting.

• Supports a standard SPI communication interface, allowing seamless integration with Arduino, ESP32, STM32, Raspberry Pi, RP2040, and other SPI-compatible development platforms.

• Designed for industrial, laboratory, HVAC, process control, and data logging applications, with a compact breakout board format and reliable operation from -40°C to +80°C ambient temperature.