Theremocouples have a very small voltage of around 0.4mV/10C.
K Type Thermocouple Voltage Table

I want to amplify that signal so I can read it with an ADC on my Arduino Microcontroller. The Voltage would be GND to +5V. Will the GS8332 IC do the job?
GS8332-SR Datasheet

I am not sure because I don't see any CMVR data in there (first time reading OP-Amp Datasheets). The Offset Voltage is only 10uV so thats good. But could it be that there is more that I need to keep in mind?

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    \$\begingroup\$ Not sure about the op-amp, but be sure to understand "reference junction". analog.com/en/analog-dialogue/articles/… \$\endgroup\$ – Mattman944 May 12 '19 at 13:45
  • \$\begingroup\$ @Mattman944 Don't worry, I will handle that seperately \$\endgroup\$ – RIJIK May 12 '19 at 16:11
  • \$\begingroup\$ What noise floor do you need? what bandwidth? if the opamp is an auto-zero or chopper, you'll have output spikes of 10 or 50 degree-C-error and need to filter out those spikes before ADC sampling. \$\endgroup\$ – analogsystemsrf May 12 '19 at 22:10
  • \$\begingroup\$ @analogsystemsrf The signal will be DC only and won't change only very slowly. My maximum Noise Voltage would be to guarantee an accuracy of around +-5C; so around 200uV. I don't think the amplifier would create a noticable amount of noise as it was designed for low voltage applications. \$\endgroup\$ – RIJIK May 13 '19 at 0:15

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