What's the Input impedance of the Digital Discovery Logic Analyzer?

[asoli]

I found the following on the datasheet on digikey, is this really the case? Is the input impedance programmable? Can I Get it to 1Mohm?

Thanks in advance

[JColvin]

Hi @asoli,

Yes, that detail is correct as per the Reference Manual here: https://digilent.com/reference/test-and-measurement/digital-discovery/reference-manual#features_and_performances. It is not possible to adjust this impedance, at least as far as I am aware.

I am not certain what the impedance is for the other I/O pins; I will ask about this.

Thanks,
JColvin

[attila]

Hi @asoli

The input impedance is fixed but the IO voltage can be adjusted 1.2-3.3V

https://digilent.com/reference/test-and-measurement/digital-discovery/reference-manual#input_dividers

https://digilent.com/reference/test-and-measurement/digital-discovery/reference-manual#io_level_translators

https://digilent.com/reference/test-and-measurement/digital-discovery/reference-manual#programmable_power_supply