AWR1642: SDK question for low power ADC mode and Regular ADC mode

Hi Sir 

refer to below link, it said " Typically, the low power ADC mode would be used for IF bandwidths below 5 MHz. For AWR1642, you would always use the low power ADC mode."

e2e.ti.com/.../719520

Q1: Why doesn't  TI  offer regular ADC mode in SDK2.0. And it only supports low power mode? 

Q2: Does AWR1642 Hardware have any change?

BR

Yimin