I'm trying to read resistence changes on strain gauge. I'm using AD8221 In-Amp and need to shift output lever with REF pin. REF pin should be driven by low impedance source. Then i should use OP-AMP to drive that.
I'm using ESP32 wroom module to drive that thing and now i'm thinking about using internal DAC from ESP to drive REF pin. But is that low or high Z?