On Mon, 18 Apr 2022, gene heskett wrote:
Date: Mon, 18 Apr 2022 04:19:27 -0400
From: gene heskett <ghesk...@shentel.net>
Reply-To: "Enhanced Machine Controller (EMC)"
<emc-users@lists.sourceforge.net>
To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net>
Subject: [Emc-users] nother Q for Peter
Greetings;
How does the A/D on a 7i76D handle overvoltage? I'm considering a long
tailed vfet pair with a 22k pullup to 42 volts. Does it just goto full
scale at an $FF output, or will that blow something?
Full scale (inputs will take up to 100V indefinitely)
but adjacent inputs may read incorrectly if more than about
50V is suppled (due to current injection into parasitic
transistors related to the input ESD diodes of the CPU)
Cheers, Gene Heskett.
--
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Peter Wallace
Mesa Electronics
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