Question on High Impedance (HZ)

[Samy_75]

Hello,

I have several question regarding HZ.
1. What does it means exatly when we say a pad is HZ? (in term of voltage current)
2- Could we directly connect two HZ pads without any specific care?
3- What if we connect a HZ pad with low or high level pad?

Thanks for your help

 

[Audioguru]

Your text is confusing:

Hz is frequency. High impedance is not HZ.
High impedance is called High Z sometimes.

What do you mean when you say "PAD"?
Sometimes a PAD is an attenuator and it should be called an attenuator, not called a PAD.

You ask about connecting PADs but don't say if they are in series or in parallel.

 

[klystron]

Hi Z means that the input impedance of that I/O pin is high and will thus not load an output driver connected to the same pin. (The 3 states are high Z , driven low(0) or driven high (1))