Dan Michaels wrote:

> "Fig 6.19 shows the common current path shared by terminators in
> the single ground pin design. This common current path introduces
> a lot of mutual inductance between the resistors in the package".

  But is damped by the termination resistance.  If it's in the hundred
kilohm range, this crosstalk is going to be *small*.

> - for commmon gnd SIP, worst case coupling = 8250 ps-ohms
> - for isolated resistor SIP, worst case coupling = 95 ps-ohms

  In the first case, the common inductance in the ground leg is
predominant.  In the second, the much smaller mutual inductance of the
loop incorporating each individual resistor is considered.

> (I assume ps = picosec, here, but you'll have to translate ps-ohms
> into english yourself)

  Something in the nanohenry or femtohenry range?

> "Crosstalk in terminations comes in both mutual inductive and
> mutual capacitive coupling .... inductive .. is usually larger ...

  For small resistances.  I'd expect the capacitive, which is not in
series with the resistance, and thus independent, to predominate for
high values such as 100k suggested.

> .... couple proportionally to the derivative of the applied
> input signal".

  Another way of saying it affects fast transients only.  Other points
noted.
--
  Cheers,
        Paul B.