[sdiy] SSM2164 last time buys

[David G. Dixon]

> The voltage drop is big and dependent to the signal input and control
> voltage input settings.
> For example 1K resistor, class A operation, +15V DC input signal, positive
> power supply is 15.08V
> So for control voltage input=0V voltage at pin16 is 7.15V
> ...for control voltage input=1V voltage at pin16 is 9.96V
> ...for control voltage input=2v voltage at pin16 is 10.04V
> For same settings that above but 330Ω resistor measurements are: 12.42V;
> 13.38V; 13.40V
> 
> So, this is serious? or maybe putting that resistors we are measuring an
> "internal" voltage?

You're measuring Ohm's law (voltage drop across the resistor corresponding
to a certain input current).  The question is, can the current sources
inside the 2164 VCAs still do their job properly when their supply voltage
is not constant?