Xref: utzoo rec.audio:8279 sci.electronics:3818
Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!ames!ncar!tank!oddjob!mimsy!aplcen!aplcomm!stda.jhuapl.edu!mjj
From: mjj@stda.jhuapl.edu (Marshall Jose)
Newsgroups: rec.audio,sci.electronics
Subject: Re: Choosing Op-Amps
Message-ID: <1882@aplcomm.jhuapl.edu>
Date: 15 Sep 88 17:20:54 GMT
References: <1152@ucsd.EDU>
Sender: news@aplcomm.jhuapl.edu
Reply-To: mjj@aplvax.UUCP (Marshall Jose)
Organization: JHU-Applied Physics Laboratory
Lines: 24

In article <1152@ucsd.EDU> brian@ucsd.EDU (Brian Kantor) writes:
>As part of my design for a really wonderous hi-fi preamp, I've been
>trying to choose the right op-amps to use ....
>

I've been poring over databooks for the roughly the same purpose, namely
the design of a studio-quality (whatever that is) mixer.  Basically, I've
been looking for the following qualities:
- low noise (~3 nV/root-Hz, 1/f knee around 1 Hz)
- high PSRR at high gains
- stable operation at G=.5 through G=500
- < $10.00/piece

I narrowed my choices to the following:
o PMI OP-27
o Signetics NE5534
o TI TL071 (maybe)

All have several second sources.  Only the first two are good for
low-noise pre-amplification, BI-FET noise performance notwithstanding.
Hope this helps.

Marshall Jose  WA3VPZ
mjj@aplvax.jhuapl.edu  ||  ...mimsy!aplcen!aplvax!mjj