[sdiy] Single rail quad op-amp recommendations

[patchell]

    Actually, I was refering to myself (a closet LM324 bigot).  Even, I an LM324 bigot
is trying to be open minded.  I have used it in precision thermometors, and even in
some synth circuits.  Mostly I don't use it much because it is just another part I
must stock.  I use the TL074 as the quad of choice because it does the most places.
For audio, I try to use only TL072/071's.

    So, sorry if you thought I was talking about you.  I would never imply you were
any kind of a bigot (well, maybe except for BBD's).  ;-o


harry wrote:

> <archie bunker mode on...>
>
> BIGOTS ???  now who would you be talkin' about?... huh, Meathead...  Y'get yer
> hippy dippy little 324 opamp and put it where the sun don't shine if you
> KNOW what I mean....    ;^)
>
> Seriously (I resemble that remark)....  The LM324 is a good single supply
> opamp... for control voltages where precision (low offset etc) is not a big issue.
>
> It has asymmetrical drive capacity... so don't REALLY load it heavy.  Use it in
> an ASDR and you might find that attack and decay times are not equal when they
> should be...
>
> And it lacks the bandwidth for good audio.
>
> But for what it is... its a useful little opamp. I HAVE even chosen it for
> professional
> use (in a current loop monitor... not a synth.)
>
> <bunker mode off>
>
> H^) harry
>
> patchell wrote:
>
> >     The quad version of the LM358 is the LM324.....Now, what makes these
> > opamps single rail is the fact that the input common mode range includes the
> > negative supply rail and the fact that the output will go almost down to the
> > negative rail.  Any opamp can be used with a single supply, of course, it
> > depends on how you are going to use it.  The CA3130 also makes a good single
> > supply opamp, since the common mode input range actually goes below the
> > negative rail and the outputs go clear to the rails.  But, this opamp is a bit
> > tricky to use, and only works up to about 16 volts.
> >
> >     Also, there are LM324 bigots on this list because the 324 has this nastly
> > little feature where you get a crossover glitch on the output under certain
> > circumstances (the data book shows how to eliminate this).  Also, the LM324 is
> > not really very good for audio frequencies.  Depending on how you use it, it
> > is running out of gas around 10KHz.
> >
> > Richard Atkinson wrote:
> >
> > > Can anyone recommend a single rail power supply quad op-amp? Something
> > > like the LM358 but four of them in a single package. I'm working on an FM
> > > expander project and I need four op-amps. The target system only has +5VDC
> > > on the expansion port.
> > >
> > > Richard
> >
> > --
> >  -Jim
> > ------------------------------------------------
> > * Visit:http://www.silcom.com/~patchell/
> > *-----------------------------------------------
> > *I'm sure glad Merry Christmas comes just once a year
> > * -Yogi Yorgensen
> > ------------------------------------------------

--
 -Jim
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* Visit:http://www.silcom.com/~patchell/
*-----------------------------------------------
*I'm sure glad Merry Christmas comes just once a year
* -Yogi Yorgensen
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