This info was specific to the cortex, but the V5 is similar. Due to the series resistor and the fact that the control signal is connected to a microcontroller, almost no current is available,
I did some poking around at the V5 ADI ports a little while ago and this is what I ended up with. It’s a pretty standard affair with a voltage divider to bring the 5V input signal down to 3V for analog readings. While most of the pins on the MCU that’s handling the ADI are 5V tolerant, this isn’t the case when the pin is in analog mode.