Other Parts Discussed in Thread: INA333,
Hi, I'm working on a project which involves the measure of whetstone bridge-based sensors (strain gauge).
Basically, there are 4 bridges, each one connected to an INA333 amplifier and to an analog input of ADS1119 ADC via RC filter.
During acquisition (single-ended, gain=1, 1000 samples per second, external reference) across R5 there is more than 1V, leading of course to incorrect measurement. If I did my math correctly, there are about 2mA going into analog inputs of the ADC. Is that current absorption normal? (so I need to decrease R5 value)
Another problem is that I see cross-talking between channels, could be related?