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<DIV dir=ltr align=left><SPAN class=997132304-27062017><FONT color=#0000ff
size=2 face=Arial>The 2164 is very fussy about power connections. If you
only connect one rail, it dies. If you fail to connect the ground, it
dies. And it dies permanently.</FONT></SPAN></DIV>
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size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=997132304-27062017><FONT color=#0000ff
size=2 face=Arial>This is probably why I almost never breadboard. Once I
figure I've got the circuit right, I just make a PCB. I prefer the
security of soldered connections, and it's no harder to lay out a PCB than to
plan out a breadboard. Also, since I typically don't make any layout
mistakes, I usually end up with a usable board straightaway, without all that
pesky breadboarding nonsense.</FONT></SPAN></DIV><BR>
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<FONT size=2 face=Tahoma><B>From:</B> Synth-diy
[mailto:synth-diy-bounces@synth-diy.org] <B>On Behalf Of </B>Sean
Ellis<BR><B>Sent:</B> Monday, June 26, 2017 6:48 PM<BR><B>To:</B>
synth-diy@synth-diy.org<BR><B>Subject:</B> [sdiy] 2164 overvoltage
condition?<BR></FONT><BR></DIV>
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<P>I've been breadboarding a filter and oscillator using a single 2164 and I
think I just fried my only 2164 on hand. I have the power supply protected but
accidentally put -12 straight into the input of one amp (the control pin was
at about 2.5V) and suddenly it died. The datasheet specifies the max ratings
to the supply rails so I don't get why it could have (seemingly) destroyed the
chip. Could it maybe have caused excessive heat?</P>
<P><BR></P>
<P>-Sean<BR></P></DIV></BLOCKQUOTE></BODY></HTML>