Op-amps

[danial stocks]

Here's my favourite op amps:: [-s =single -d=double -q=quad]

low noise: NE5534 [NE5534A ultra low noise] -s NE5532 [NE5532A uln] - d 
**NE5534/A req's gain >3 for stability

good performance for audio apps : -d LM833 M5218 AN4558 AN4560[improved 
4558] TL082 TL072 [says lo noise in the book but the noise spec seems same 
as TL082] / -q TL084, TL074 , UA4136[note: 4136 has DIFFERENT pinout to 
'industry std' quad pkg ie TL074 etc]

single supply - these are very good for dc apps ie cv control, lfo's etc 
because they track all the way to the -ve rail [most op amps cant do this] 
LM358 -d LM324 MC3403 -q also LMC7111BIM5 -this is a tiny surface mount op 
amp in a 5 pin package similar to s.m transistor these are cmos [low power 
consumption] and track rail to rail so long as the load impedance is fairly 
high [not recommended to drive transcond op amp bias pins!] great when space 
is a premium..
** single supp / r2r op amps are not renowned for low noise/ fast slew rate 
etc.. recommend do not use these in the audio path **

how do they rate?
slew rate:
NE5534/A =13v/us
TL07x, TL08x = 13V/us typ
NE5532/A = 9v/us
4560 = 4v/us
LM4136 =1.7v/us
4558 = 1.7v/us

unity gain bandwidth:
NE5532/A, NE5534/A = 10Mhz
4560 = 10Mhz
LM4136 = 3Mhz
TL07x, TL08x = 3Mhz
4558 = 3Mhz

Noise nv/^hz @ 1KHZ
NE5534A= 3.5 [4MAX]
NE5534= 4
NE5532A= 5 [6MAX]
NE5532=  5
4558,4136 = 8
TL07x, TL08x= 18

I usually use NE5534 for really hi gain/lownoise/input stages, 4558 for most 
other audio work, TL084 or TL074 for audio if a quad is needed , LM324 or 
LM358 for DC apps or TL series for noncritical DC apps [where -supp range 
isn't needed].. of course, there are many other choices available, but I 
find that these do the job nicely, are not too expensive, and readily 
available..
** a final note on the 5534.. these tend to oscillate easily due to the wide 
bandwidth.. it is often necessary to add small caps in the feedback loop to 
stop high frequency oscillations [decreasing the bandwidth also reduces the 
noise input]
Cheers,
Dan

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