I have 2 load cell parts, one for 1kg and the other for 200kg. The 1kg load cell works good with pins 4&15 shorted, but the 200kg load cell gets the precision reference to drop a little. That is the reason I use attached scheme in which they propose the use of TIP29C if the precision reference voltage drops because of current drain. I just followed instructions and it worked.
I have read something about keeping ADC input imedance below 2k, but could not understand it, so I was hoping somebody could give me some advice on connecting INA125 precision voltage reference with PIC VRef+/- pins for the goal of getting ratiometric configuration and stability on ADC readings?
Anybody have a sugesstion?
King regards