Is there any ic with on chip cold junction compensation and amplification ,which can be used for all types of thermocouples?
ADI thermocouple amplifiers such as AD8494 and AD8495 are designed for J and K-type thermocouples, which were chosen for their sensitivity, availability, and relatively wide linear temperature range. Some legacy parts such as the AD595 can be calibrated for different types of thermocouples with external resistors, but the process is time consuming and not practical for mass production. There is no ADI thermocouple amplifier with selectable gain and cold-junction compensation for many thermocouple types.
Are you designing a universal thermocouple interface, or will each input only interface to a single thermocouple type?
Here are a couple articles about the topic that are worth reading:
I hope this helps.