myRIO digital pin input impedance

[adjghkhzbu]

Hello,

I'm trying to make an inverter using myRIO.

The inverter circuit contains ADC for current sensing and digital signal of sensed current goes to myRIO digital pin.

For impedance matching problem, I need to know input impedance of myRIO digital pin.

Has anyone dealt with this problem?

Thank you.

[Bob_Schor]

I think of it as a "normal TTL Input port", 0 to 5V, with Low being 0 - 0.8 V, and High being 2 - 5 V.  I would not expect them to draw significant current, meaning the input impedance is whatever is reasonable for a TTL In.

Bob Schor