lucamagno90:
You are right, it's very low. I've read in the adc manual that the freqency sample is 1 Msps. So, sampling rate is not frequency sample.
The A/D chip is connected through an I2C expansion chip that is only running at 100KHz. It is a piss poor design. I was talking to the designers at the Rome Maker Fair 2013 and they said that they did not realise the chip could not be run faster. Now on the second iteration of the board thy have put on a chip that can run at 400KHz hence it is four times faster but still piss poor. It is just a very badly designed system.