Hi, i'v a problem with our prototype application using an AD8231( differential modality) amplifier,
Into output's channel we visulize from oscilloscope an a variable offset when the input is open, we use an passive input circuit ( R/C) ( from datasheet specify)
A suggestion to possible causes
I would have to ask for more details to see if there are problems with your prototype.Can you specify or show the schematic diagram for your AD8231 application? Also can we see an actual scope shot you mentioned on your oscilloscope.
Though in terms of the measurement you described, you shouldn't leave the input pins open if you want to measure the device's offset voltage or other specific parameters.Here's a quick article with regards to measuring offset voltage of an amplifier (https://www.analog.com/media/en/training-seminars/tutorials/MT-037.pdf )MT Series: https://www.analog.com/en/education/education-library/tutorials/analog-electronics.html
I hope this helps Frank.
Hi, sure that is a high complexity problem but i send photo with snapshot in other side a problem to oscillatory persistnce inside 2mV, i copy pcb that EVAKIT AD8231.