SPICE simulation of a K Type Thermocouple. The MAX6675 is a thermocouple-to-digital converter with a built-in 12-bit analog-to-digital converter (ADC). It performs cold-junction compensation and digitizes the signal from a type-K thermocouple that senses a difference in temperature between two ends of the thermocouple wires. The thermocouple‘s hot junction can be read from 0°C to +1023.75°C.The cold end, on which the MAX6675 is, can range from -20°C to +85°C. The microcontroller does a conversion every 450ms and shows the readings on a 7 seg display through 4 four-output CMOS buffers TC4468.