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Information about current

Posted: Wed Oct 12, 2016 9:26 pm
by ferboy93
I need to know what is the maximum current that support analog input channels of red Pitaya, I read that support 3.5 volts, but have not found anything about the current. :(

Re: Information about current

Posted: Thu Oct 13, 2016 7:43 pm
by Nils Roos
The RF inputs have a high impedance (1MOhm / 10pF), which means they will draw very little current from the signal source.
The slow analog inputs have an impedance of ~35kOhm, according to the published schematics. So they'll draw 100µA at full scale input.