ADC-20 Thermocouple amplifier

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_NigelH
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ADC-20 Thermocouple amplifier

Post by _NigelH »

I need to add a thermocouple sensor to an ADC-20 with terminal board. The AD595 IC recommended in the terminal board User's Guide is now obsolete, so I am trying to use the Analog Devices alternative AD849x. A development board from Adafruit (ref 1778) provides a neat breakout for this IC that can be installed using spare pcb holes for the ADC595. My question is, how do I determine the correct component values for resitive divider network to connect the output to an ADC channel? The breakout board is AG referenced, so do I need the 2.5V supply via Rs, as shown in the user's guide circuit?
Thanks in anticipation.
Nigel H

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