AD7793 Isolated K Type Thermocouple Module Temperature Sample Module PT100 Cold Junction Compensation

AD7793 Isolated K Type Thermocouple Module Temperature Sample Module PT100 Cold Junction Compensation

Features:
- Based on AD7793, complete temperature measurement system is based on the recommended document of ADI CN0206_cn.
- PT100 is used as cold junction compensation, and 4-layer PCB cross-average temperature wiring.
- Support wide input voltage of 3-9V DC. Powered by 3.3V, its typical current is 19mA. Powered by 5V, the typical current is 12mA.
- SPI interface supports SPI multiplexing multi-channel applications.
- The maximum thermodynamic potential at 32 times gain is 36.5625mV, which corresponds to a K thermocouple index table of 881℃.
- The maximum thermodynamic potential at 16 times gain is 73.125mV, covering the entire measurement range of the K thermocouple.
- The minimum isolation voltage is 2500 VDC.
- Signal isolation chip is ADUM1401.
- Provides analog SPI reference program (STM32F10X).

FAQ:
- Q: What is the temperature resolution?
- A: The temperature resolution is about 0.03 degrees, and the typical noise is 0.085 degrees. (In a closed constant temperature environment, the temperature data is stable when there is no digital filter. The amplitude of the data is 0.085 degrees. When the thermocouple is exposed to the air, air flow will bring more than 0.2 degrees of bounce.)

- Q: How does it convert the thermocouple thermoelectromotive force that is read into a temperature value?
- A: Use the look-up table method or the piecewise fitting method to convert the nonlinear "thermo-electromotive force-temperature" into a temperature value.

Package Included:
- 1 x AD7793 Isolation K Thermocouple Module
- 1 x 2X4 Pin Header