ADAS3022 PGIA Setting for single ended

This ADC has programmable gain instrumentation amplifier that can accept full scale differential inputs. As per my understanding we can program the gain when using differential signals.But in my design I am using eight single-ended input channels, so in this case what will be the PGIA setting? will it be a default condition i.e. +/-20.48V (PGIA GAIN=0.2) ?