Thank you for all your replies, the limit of 500ksps is only for the ADC included in the mainboard (that is enough for data logger and maybe for the IV curve tracer). The real limits depends mainly of the additional hardware that you add in the shape of a daughter board. Because the DE10-Nano supports the Arduino Uno shields is possible to use several third-party boards, some of them with very more capable ADC and DAC. The great about of this project is that you can use the software and firmware developed to create, customize and extend your instruments.