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SparkFun Thermocouple Breakout - MAX31855K

3 years ago 681
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Description

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Description: The SparkFun MAX31855K Thermocouple Breakout is a simple 14-bit resolution, SPI-compatible, serial interface thermocouple digitizer that makes reading a wide range of temperatures possible. A thermocouple works by taking two wires made of dissimilar metals, connecting them at the two ends, and making a temperature gradient between one end and the other (a ‘hot’ end and a ‘cold’ one). Once this is achieved, a voltage potential is formed and current flows. The SparkFun Thermocouple Breakout takes a standard Type-K thermocouple in one end, digitizes the temperature measured and sends that data out the other end via a SPI interface, thereby interpreting the data and translating it for you to read!

With the SparkFun Thermocouple Breakout, the thermocouple’s hot junction can be read from -200°C to +700°C with an accuracy of ±2°C while the cold junction, inside the MAX31855K, can only range from -20°C to +85°C while maintaining ±2°C accuracy. The MAX31855K constantly measures the temperature of the cold junction using an internal temperature-sensing diode. The MAX31855K requires a power source from +3.0V to +3.6V (+3.0V nominal) and only draws 1.5mA maximum.

The Thermocouple Breakout is designed to accept a standard thermocouple connector, for convenience and compatibility with probes you may already own. These connectors aren’t necessary, and you could solder a thermocouple directly into the through holes labeled ‘+’ and ‘-’. If you decide to solder the thermocouple directly to the breakout board, it is recommended that the thermocouple be mounted for strain relief to avoid breaking the thin wires. Notches for a zip-tie or wire wrapping have been provided in the PCB opposite the header for this purpose.

Features:

14-bit Resolution SPI-Compatible, Serial Interface -200°C to +700°C Temperature Reading with ±2°C Accuracy 3.0V to 3.6V (+3.0V nominal) Required Accepts Type-K Thermocouple

For more detail and Documents, Please visit: http://www.sparkfun.com/products/13266

Documents

SparkFun_Thermocouple_Breakout_v10

BOM

ID Name Designator Footprint Quantity Manufacturer Part Manufacturer Supplier Supplier Part Price LCSC Assembly Mounted
1 0.1uF C1 C-0603 1
2 MAX31855K U1 SOIC8 1
3 DNP JP1 1X06 1
4 470OHM L1,L2 0603 2
5 10nF C2 C-0603 1
6 PCB_THERMOCOUPLE JP2 PCC-SMP 1
7 TEST-POINT TP1,TP2 TP_15TH 2
8 10k R1 3-0603 1

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