Freescale Semiconductor

Thermocouple Experiment Page


This is the page to use the LTC 2498 8-channel 24-bit Sigma-Delta Analog to Digital Converter as a thermocouple reading device. Please connect the thermocouple between GND and Input Channel 0.

Note that the conversion algorithm assumes operation in the linear region of the thermocouple.


Channel Setting:


Keep Previous Speed and Rejection Setting:
Keep Previous

External Input - Speed and Rejection Setting:
Reject 50/60 Hz, x1 speed
Reject 50 Hz, x1 speed
Reject 60 Hz, x1 speed
Reject 50/60 Hz, x2 speed
Reject 50 Hz, x2 speed

Temperature Sensor - Speed and Rejection Setting:
Reject 50/60 Hz, x1 speed
Reject 50 Hz, x1 speed
Reject 60 Hz, x1 speed

Reference Voltage (V)



LTC 2498 Voltage Reading:

0 Volts


Cold Junction Temperature:

0 Kelvin

0 °C


Thermocouple Temp Coeff (µV/°C)



Thermocouple Temperature:

0 Kelvin

0 °C