Boardoza MAX31855K K-Type Thermocouple Breakout Board
Boardoza MAX31855K Thermocouple Breakout Board is a high-precision thermal measurement module designed for K-type thermocouples, featuring internal cold-junction compensation and a 14-bit analog-to-digital converter. Powered by the MAX31855K converter IC, the board resolves temperatures down to 0.25°C across an operating range of -200°C to +1350°C, outputting digitized temperature readings and diagnostics over a read-only SPI interface. The analog input stage incorporates differential filtering to reject environmental noise and electromagnetic interference from the thermocouple leads, supported by built-in hardware fault detection for open circuits and shorts to VCC or GND. This module delivers a dependable plug-and-play solution for industrial furnaces, HVAC systems, exhaust gas sensing, and high-temperature process monitoring.
Key Features
- Integrated Cold-Junction Compensation: Used with K-type thermocouples featuring built-in reference junction compensation for accurate thermal tracking.
- High-Resolution 14-Bit ADC: Delivers 0.25°C resolution across a wide temperature measurement span ranging from -200°C to +1350°C.
- Hardware Fault Diagnostics: Automatically detects and reports open thermocouple circuits as well as shorts to VCC or GND.
- Read-Only SPI Interface: Outputs 32-bit data packets containing compensated thermocouple temperature, internal reference junction temperature, and fault flags over a standard SPI bus.
- Differential Input Noise Filtering: Features an onboard differential filter network to suppress ambient electromagnetic interference (EMI) and transient noise along thermocouple leads.
Technical Specifications
- Item
- B-MAX31855K-BRK
- Input Voltage
- 3.0V to 3.6V DC (3.3V nominal)
- Digital Interface
- SPI-compatible, read-only interface (SO, SCK, /CS)
- Compatible Measurement Element
- K-Type Thermocouple
- Measurement Range
- -200°C to +1350°C
- Measurement Resolution
- 0.25°C (14-bit signed data output)
- Measurement Accuracy
- ±2°C from -200°C to +700°C (\$T_A\$ = -20°C to +85°C)
- Operating Temperature
- -40°C to +125°C
- Board Dimensions
- 20x20mm
Support
For technical questions, documentation and issue reports, use the GitHub repository or write to us directly.