I am using ADS4122 in my card and I am surprisingly observing that MSB is toggling even though ADC has no analog input.
The differential input at ADC shows 0V on oscilloscope.
I thought there might be something wrong with my card, but the same thing also observed with evaluation board ADS4125EVM.
The power supply has no noise in Analog & Digital VCC and GND and this is observed in all configurations like Offset Binary LVCMOS/LVDS and 2's complement LVCMOS/LVDS.
I am looking for your valuable suggestion to find out what is going wrong.