Minimum Bondwire inductance value

[jlgr]

Hi!
Does anybody could tell what is a practical minimum value for the bondwire inductance?
i'm working at 2.4 GHz and 90 nm technology.
thanks

PS: if you know typical pad capacitance value will be also very helpfull

 

[BigBoss]

As a rule of thumb, 0.8nH/mm is pretty well approximation for bond-wires.
However, this inductance value is quite variable with neighbor bond-wires due to mutual couplings that is dependent on package,die-pad,sequencing etc.
Therefore, the package which is in your application should be simulated in a 3D EM simulator and a SPICE model should be obtained for a more accurate result.

 

[jlgr]

thats right, but I mean a minimum total value.
the question could also be, for using the inductance/long data, how short could the bond wire be fabricated? (a practical value)

why do I wanna know this?
I'm designing a CS LNA, I have a lot of posible designs (from theoretical-simulation methodology) and I want to discard those with non practical values for passive elements, in this case inductors.

 

[BigBoss]

Nobody say something without information about your package level...
They can be 0.3mm or 2mm.. or something else..
You should also know about package height,die-pad thickness, bonding bending etc.
So, it's not so easy to say "that is it"..