Sample and Hold + Input Protection

[Roy Tate]

Has anyone used a LF398 monolithic sample and hold
in a module?  The data sheet looks very promising.

And since Gene Stopp mentioned the ASM-1 gating
problem ...

On a seperate topic, what does everybody here do for input 
protection?  To give you an idea what I am talking about,
I was reading the "CMOS Cookbook" and saw an example
on page 44 of interfacing an op-amp to CMOS.  The op-amp 
was powered by +15 and -15, and the CMOS was powered 
by some lower voltage, let's say +7.5 and -7.5.  The op-amp
output went through a 12K resistor, and then was protected
by 2 diodes, one to +7.5, the other to -7.5, and then to
the CMOS gate.

[ASCII-Gram: Use Courier Font]

                       +7.5V
                       |
                       -
                       ^
                       |
Op-Amp Out ---- 12K ---*-----CMOS Gate
                       |
                       -
                       ^
                       |
                       -7.5V


Regards,

Roy Tate
roytate at ionet.net
http://www.ionet.net/~roytate