I don't know which exact amplifier you have; just the manufacturer. They have over 40 instrumentation amplifiers in production.
So I just put my offset voltage here I guess right?The reference terminal potential defines the zero output voltage and is especially useful when the load does not share a precise ground with the rest of the system. It provides a direct means of injecting a precise offset to the output, with an allowable range of 2 V within the supply voltages. Parasitic resistance should be kept to a minimum for optimum CMR.
No I can tell you, I just don't want to have a full schematic floating around out there just in case it became a issue in the future. it's not very far, on a PCB it would be close, but since this is a solder protoboard yes there are lots of wires so that is probably where I am picking up the noise, it's maybe about 5 inches away.I don't know how far away your FET/49.9 Ohm resistor is from your ADC, and I suppose you can't tell me either. The further away it is, the more likely you are to pick up noise.
I remember starting a SPICE simulation in college on a 386sx and coming back an hour later to see if it was finished. Now you can tweak values and see the results in realtime.Everything you do in a SPICE simulation is an approximation. Lots of "shortcuts" are taken along the way, as trying to model ALL of the parameters of a device would not only be very labor-intensive, you would wind up with a very complex mathematical model that would take just about forever to run. You might as well just build the thing to begin with.
I know this is an old post but just for those who follow down this path ... AD820 is RRO, and just about RRI, it works from +V and -V (18 V) and is available in a DIP ... which makes it a rare bird. Dual is AD822. AD820 offset pot is a 20K returned to -V, like LM741 style.I don't know which exact amplifier you have; just the manufacturer. They have over 40 instrumentation amplifiers in production.
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