Above circuit design is thermocouple amplifier circuit using CA3193 operating amplifier. The CA3193 is an excellent choice for use with thermocouples. ? In the circuit, the CA3193 amplifies the generated signal 500 times. The three 22M? resistors will provide full-scale output if the thermocouple opens.
The CA3193 are ultra-stable, precision instrumentation, operational amplifiers that employ both PMOS and bipolar transistors on a single monolithic chip. The CA3193 amplifier are internally phase compensated and provide a gain bandwidth product of 1.2MHz. They are pin compatible with the industry 741 series and many other IC op -amps, and may be used as replacements for 741 series types in most applications.
Download CA3193 datasheet for your thermocouple amplifier project reference: download link
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