[sdiy] Question about LM301A

[patchell]

    The LM301A is more or less just an improved 741.  It has better DC
specs than the 741, as I recall (i.e. much better Vos drift, lower bias
current).  It also has external compensation.  If you are running the
301 invertered, you can use feed forward compensation and get something
like 10V/us Slew rate out of it (compared to the 0.5V/us using the
standard compensation, which makes it have pretty much the same AC
characteristics as the 741).  However, I have found that you need to be
careful using the feed forward as in some applications it causes more
problems than it cures.

    The LM108 is the military temp range version of the LM308, so, they
are identical.  The LM308 has much better DC characteristics than the
LM301 (very low bias current, very low Vos drift).  However, it has very
poor AC performance.  It is only suitable for DC and Very low frequency
AC (5KHz is about tops).

Ken MacBeth wrote:

>     Hi! I am just wondering what is so special about the LM301A? I see
> it used in many designs- I use it in an Arp noise gen. copy. I've
> replaced it with the basic 741 and the results have been unusable...
> Also, I have a stack 'gold and white' LM108's- can I use them in
> circuits that use the 308?
> Any answers appreciated! Regards, Ken

--
 -Jim
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