Right now im using AD8237 with MCP4725 to remove bridge unbalance. I'm using 3x 1k Ohm resistors and one strain gauge arranged in Wheatstone bridge.
It works perfect for me, but I came across two problems: -Availability of AD8237, -Need more samples / sec.
That's why now I'm thinking about moving to traditional in-amp like AD8421. I came up with such circuit:
I don't have enough PCB space to drive in-amp Ref pin with Op-amp, and there comes first question - can i drive that with shunt reference? I't has low impedance of less than 1 Ohm, so it shouldn't be a problem?
Then I've cut half of bridge and replaced it with Reference voltage + DAC output voltage with two not-yet calculated resistors.
That do You think about it? Will it work or not?