Does anyone know of any ill effects from using an analog multiplexer to connect multiple thermocouples to a cold junction compensation IC? Please assume that the temperature of the multiplexer and the CJC can be kept the same. I'm mainly wondering about issues such as the thermocouple voltage might go negative (beyond the supply of the mux) and whether or not a mux can cleanly pass such a low voltage signal.
https://www.electro-tech-online.com/custompdfs/2007/10/AD594_595.pdf
https://www.electro-tech-online.com/custompdfs/2007/10/MAX396-MAX397.pdf
https://www.electro-tech-online.com/custompdfs/2007/10/AD594_595.pdf
https://www.electro-tech-online.com/custompdfs/2007/10/MAX396-MAX397.pdf
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