Re: Input protection

From: sleeper75se (sleeper75se_at_yahoo.se)
Date: 2002-01-08 13:29:51


--- In buildcheapeeg_at_yahoogroups.com, "Jim Meissner" <jpmeissner_at_mindspring.com> wrote:
> Dear Andreas:
>
> > The cost is decent (ranging from $3.70 to $7.40), and from just
> > browsing through the datasheet, I think it is better. Also, it
> > comes with sufficient ESD protection built in. Just add two 5k
> > resistors! :-
>
> I think you found a great amplifier (LT1167) that solves the ESD
> problems. Also the 2N4393 FET diodes are probably much better than
> the 2N3904 that I suggested.
> Notice their RFI reduction comments!

Hi Jim,

Yes, it looks very nice! My modified schematic looks now like an
application note from Linear Technology. (Hmm, maybe they can sponsor
us. :-)

One question about those FET-diodes... they are only connected to V+.
Shouldn't there be diodes to V- as well? Of course, the people at
Linear know what they are doing...

/Andreas



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