I am trying to resolve an offset issue I am seeing on the ADS1675REF eval board:
The inputs on ADS1675REF are set up for single-ended, 0-5V input range. For the offset test -IN grounded (+IN = 2.5V, R8 = short and -IN = 0V, R7 = short).
The readout on the GUI is -2.452V, so about 48mV shy of the -2.500V I would have expect.
When the inputs are both set to 0V or 2.5V, this offset is only 3 to 4 mV.
What is causing the large offset at 0V? Can it be compensated?
Thanks for your advise.