Thanks for sharing these images. In terms of hardware configuration, I believe everything looks fine.
Just to be clear, if you start with the ADC3663EVM USB disconnected and the ADC35XXEVM GUI closed, then connect the ADC3663EVM USB and launch…
Yes, the ADS6442 supports 2Vpp differential input (1.5VDC common mode) so voltage swings from 0.5V to 2.5V.
ADC3443 also fits all of your requirements.
If interested in a 2CH ADC, the ADC3663 is a 16 bit, ultra low power 65MSPS SAR ADC.