Part Number: OPA2342
Tool/software:
Hello TI team,
We are in the process of modifying our existing thermocouple acquisition circuit using the image below. The difference b/w the previous design and the present design is that we have introduced the non-inverting amplifier to achieve a total gain ( differential amplifier gain-122, non-inverting amplifier gain-178). Previously, a single instrumentation amplifier has achieved a gain of 300.
The problem that we are facing with the present modification is, that the output of the non-inverting amplifier fluctuates than the existing design.
New modified design Existing Design
Could you please help me understand, why the non-inverting amplifier is making noise at the output.?
Regards,
Murugavel.S
