Monte M, Scott Dorsey? Direct Replacement for LF351 op amp?

[Nathan Eldred]

I need a direct pin compatible replacement for the LF351 op amp?
TL072? LT1357? OP275? Is there something better, with low chances of
oscillation? Mainly for line input. Thanks in advance.

Nathan Eldred
http://www.atlasproaudio.com

[Phil Allison]

"Nathan Eldred"
>
> I need a direct pin compatible replacement for the LF351 op amp?


** Then you need a single op-amp.


> TL072? LT1357? OP275?


** Those are duals - except for the 1357.


Is there something better, with low chances of
> oscillation? Mainly for line input. Thanks in advance.


** The TL071 is equivalent.

The OPA627 has exceptional specs - and price too.




............ Phil

[Stephen Sank]

LF351 is a single channel device. I'd choose a BurrBrown OPA134PA or OPA604PA.

--
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"Nathan Eldred" > wrote in message
om...
> I need a direct pin compatible replacement for the LF351 op amp?
> TL072? LT1357? OP275? Is there something better, with low chances of
> oscillation? Mainly for line input. Thanks in advance.
>
> Nathan Eldred
> http://www.atlasproaudio.com

[Mike Rivers]

In article > writes:

> I need a direct pin compatible replacement for the LF351 op amp?

How about another LF351? It's probably perfect for the design in which
it's used. The only reason I can see to replace it is if died.

Of course if you want to design something else around the existing
socket, that's your business. Start plugging in pin-compatible ICs and
start listening. If it sounds OK, put a scope on it and start looking
for oscillations that you can't hear, but which will affect things
that you could hear if you listened hard enough.

--
I'm really Mike Rivers )
However, until the spam goes away or Hell freezes over,
lots of IP addresses are blocked from this system. If
you e-mail me and it bounces, use your secret decoder ring
and reach me here: double-m-eleven-double-zero at yahoo

[John La Grou]

On 8 Aug 2004 00:46:03 -0700, in rec.audio.pro you wrote:

>I need a direct pin compatible replacement for the LF351 op amp?
>TL072? LT1357? OP275? Is there something better, with low chances of
>oscillation? Mainly for line input. Thanks in advance.
>
>Nathan Eldred
>http://www.atlasproaudio.com


Hi Nathan,

LF351 is an old FET input device with fair drive spec and so-so noise
spec. For a drop-in replacement, try the TI OPA604AP. Much lower
root-Hz noise, much higher slew rate, way more output current, IMO
better sounding (though the 351 wasn't bad for its era), and similarly
unity gain stable. An alternative drop-in might be the OPA132AP --
less expensive, even lower noise.

Ignore JW -- both are good sounding parts :-)

JL

[Peter Andersson]

(Nathan Eldred) wrote in message >...
> I need a direct pin compatible replacement for the LF351 op amp?
> TL072? LT1357? OP275? Is there something better, with low chances of
> oscillation? Mainly for line input. Thanks in advance.
>
> Nathan Eldred
> http://www.atlasproaudio.com

Nathan,

Is this by any chance for a Sound Workshop Series 30?

I replaced the LF351s with OPA604s in the line inputs of my Series 30.
They oscillated at minimum gain but that was solved with a small cap
connected as Monte suggests. I don't recall the value right now but I
can check that if you want.

Peter Andersson