Suggestion For CFA Op-amp - diyAudio
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Old 1st May 2014, 05:47 AM   #1
bimo is offline bimo  Indonesia
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Default Suggestion For CFA Op-amp

I always use VFA op-amp like NE5532, OPA4134, TL072, TL084, etc. I want to try CFA op-amp for line pre-amp. Please suggest me, what op-amp should I use. The op-amp must 2 op-amp in single package and DIP package. And cheap also .

Thank you,
Anistardi
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Old 1st May 2014, 09:48 PM   #2
juma is offline juma  Serbia
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It won't be easy to find (dual "CF" OpAmp in DIP package) - they usually dissipate a lot of power (heavy current users) so something like AD811 (single/DIP) or AD815AYS (dual/SIP-15) is what you can aim for...
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Old 1st May 2014, 09:54 PM   #3
jcx is offline jcx  United States
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preamp what?

home audio today the "generic preamp" function is not the big deal it was decades ago

today most have digital audio outputs already at consumer line level and maybe a phono preamp - which is usually its own separate thing
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Old 2nd May 2014, 12:16 AM   #4
bimo is offline bimo  Indonesia
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Quote:
Originally Posted by juma View Post
It won't be easy to find (dual "CF" OpAmp in DIP package) - they usually dissipate a lot of power (heavy current users) so something like AD811 (single/DIP) or AD815AYS (dual/SIP-15) is what you can aim for...
Thank you.
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Old 2nd May 2014, 12:22 AM   #5
bimo is offline bimo  Indonesia
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Quote:
Originally Posted by jcx View Post
preamp what?

home audio today the "generic preamp" function is not the big deal it was decades ago

today most have digital audio outputs already at consumer line level and maybe a phono preamp - which is usually its own separate thing
It is nice to have input selector, volume control, and line pre-amp with a little voltage gain.
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Old 2nd May 2014, 12:47 AM   #6
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AD8017 - but its SO8 so you'll need an adapter.

I hope you're not intending to retrofit CFA in place of VFAs
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Old 2nd May 2014, 01:23 AM   #7
bimo is offline bimo  Indonesia
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Quote:
Originally Posted by abraxalito View Post
AD8017 - but its SO8 so you'll need an adapter.

I hope you're not intending to retrofit CFA in place of VFAs
I just want to try. That it's. I have experience to design a CFA amplifier, don't worry, I think I have enough knowledge to implement it.

Btw, thank you.
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Old 2nd May 2014, 01:39 AM   #8
RNMarsh is online now RNMarsh  United States
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AD844 ?

-RNM
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Old 2nd May 2014, 01:49 AM   #9
bimo is offline bimo  Indonesia
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Originally Posted by RNMarsh View Post
AD844 ?

-RNM
Thank you, Mr. Marsh.
I will check the datasheets, parts availability and of course the price
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Old 2nd May 2014, 02:29 AM   #10
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Over here AD8017 is 3 for $1, AD815 is half that price hence I stopped using AD8017 when I discovered AD815...
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