Interfacing Terasic THDB_ADA Daughter Card with Cyclone III Starter Kit

Thanks for responding komi ...

I asked the same questions to Terasic-support, and even they replied that the "analog-input voltage range is 2vp-p".

But what exactly does a 2Vp-p translate to: (-1V to +1V) or (0V to 2V) or anything else?

You have quoted it as (-1V to +1V), but my observations into the AD datasheet (AD9248) that came along with the CD suggest something different.

There, in the Absolute Maximum Voltage Rating section, VinA & VinB have absolute minimum voltage of -0.3v. Also ... the datasheet mentions an example where they mean (0V to 2V) by 2Vp-p. (pics attached).

Of course, one can argue that these ratings refer to the actual A/D IC, and not our THDB_ADA inputs directly. There's a lot of interfacing circuitry in between.

This makes us closely scrutinize the board-schematic on the mentioned CD. There, the circuit between the SMA connector & An-Inputs to A/D IC, just resembles some filter. (no voltage scaling seen)

So I guess, finally - the analog inputs that we can give to the SMA connectors must be between (0v to +2v). What say ?