Thanks Gregg.
Actually I had a look at this kind of devices, and although they offer a substantial isolation strength, it is still not enough for our application in which we need to isolate from voltages up to 15kV. Moreover, the bandwidth we are looking for is more towards 1 MHz.
So I think we'll just try to integrate a small size FPGA or microcontroller on the board, just to be able to correct for any gain- and offset errors, and to get the output data in the desired format.