ADAS1000-1 Amplifier and Filter

Hello, 

My question is concerning the ADAS1000-1. There are certain electrode input ranges usually from 0.3V to 1.6V I believe. Does that mean we would need to implement an amplifier before sending the ECG signal to the ADAS? Just because an ECG signal has voltage of 1mV-3mV. Also would you recommend against including an amplifier and analog bandpass filter before sending the ECG signal to the ADAS? I know the ADAS1000 has an internal gain but just wanted to check.

Thanks