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CE219905 - PSoC 3 and PSoC 5LP: Temperature Sensing with a Thermocouple | Cypress Semiconductor

CE219905 - PSoC 3 and PSoC 5LP: Temperature Sensing with a Thermocouple

Last Updated: 
Oct 22, 2018
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Thermocouples are sensors commonly used to measure temperature in applications that measure very high temperatures, or require a sensor that is rugged. A thermocouple produces a small change in voltage per change in temperature (40 μV/°C). This requires a precise and accurate measurement system. The Delta Sigma ADC on PSoC 3 and PSoC 5LP devices has the required precision and accuracy to measure temperature using a thermocouple with no need for external amplifiers or ADCs. For full details on the theory of thermocouple measurement, see AN75511. This code example demonstrates how to configure a PSoC 3 or PSoC 5LP device to accurately measure temperature using a thermocouple. The measured temperature is displayed on an LCD on either CY8CKIT-030 or CY8CKIT-050. This code example allows the use of either an IC temperature sensor or thermistor for cold junction compensation. CY8CKIT-025 is required to run this example.