Using the LT1025 to Compensate Multiple Thermocouples

Hello,

I'm working on an analog front-end design for a product that will be sampling multiple thermocouples with a restriction on area of design. I was looking at the LT1025 as it support CJ compensation for a number of TC types. This might be a silly question, but can a single device be used to compensate multiple TCs for multiple instrumentation amplifiers? Should it? A colleague of mine has brought up this as a consideration, and the TCs will all be coming in on the same connector, so on paper, I think this is okay. My concern would be driving multiple instrumentation amps using this part. If anyone has done this before, I'd appreciate their perspective!

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  • Hi JGilbert95:  If you use the LT1025 in its simplest configuration, such as on the front page of the data sheet, then yes you can connect as many thermocouples as you like.  

    These days, with all the extra RF flying around, I would suggest RC's at both ends of each thermocouple, such as 100 Ohms and 0.1uF.

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  • Hi JGilbert95:  If you use the LT1025 in its simplest configuration, such as on the front page of the data sheet, then yes you can connect as many thermocouples as you like.  

    These days, with all the extra RF flying around, I would suggest RC's at both ends of each thermocouple, such as 100 Ohms and 0.1uF.

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