replacement for OPA627

Ryssen · 18th December 2003, 11:49 PM

Is there a replacement (cheaper) for OPA627,to be used as an
outputstage for a DAC.

KevinLee · 18th December 2003, 11:59 PM

You might want to look at the AD8610/AD8620.

Some like LM6172 or AD826, they are dual package though.

There is a new AD piece called AD8065, I have not heard anything at all about it.

I like both OPA627 and AD8610/20.

There is nothing better than trying a few different types and making your own decision.

Good luck

KevinLee

tool49 · 19th December 2003, 12:40 AM

I second KevinLee's choice of AD8610/AD8620. I would not suggest to go much lower in price range as you might find that the quality difference by the few extra dollars is well worth it.

Hope this helps!
Sébastien

peranders · 19th December 2003, 06:36 AM

OPA627 isn't the only opamp around that fits. In what way are you going to use the opamp, filter, I/V converter, buffer?

AD8610 is good (better) but slightly noisier and can take max +- 13 volts, only in SMD SO08. Check for amps with noise less than 6 nV/sqr Hz and sr > 10 V/us

Ryssen · 20th December 2003, 08:42 PM

There are 2 OPA627 in the shematic, the first one is for I/V converter,then there´s a filter then another OPA627 as buffert.

PMA · 21st December 2003, 03:01 PM

How about LM741?

Ryssen · 21st December 2003, 03:15 PM

Yes, the LM741.I guess you are using it?

millwood · 21st December 2003, 05:11 PM

Quote:

Originally posted by PMA
How about LM741?

or my favorite: lm324,

mlloyd1 · 21st December 2003, 06:02 PM

you guys are missing out on audio nirvana: the LM709
very rare now, nobody wants to part with theirs

:-)

Seriously, I've been seeing some folks very interested in the LT1363 (I think that's the right number). I haven't tried it myself yet, but I have a buddy that REALLY like it IN SOME APPLICATIONS. NOTE: it is not a JFET input device; sometimes that matters.

mlloyd1

PMA · 21st December 2003, 06:13 PM

Quote:

Originally posted by mlloyd1
you guys are missing out on audio nirvana: the LM709
very rare now, nobody wants to part with theirs

:-)

mlloyd1

Very good idea, indeed. But be careful - this part needs sophisticated frequency compensation

18th December 2003, 11:49 PM	#1
Ryssen diyAudio Member Join Date: Dec 2003 Location: Sweden--> Here	replacement for OPA627 Is there a replacement (cheaper) for OPA627,to be used as an outputstage for a DAC.

19th December 2003, 06:36 AM	#4
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	OPA627 isn't the only opamp around that fits. In what way are you going to use the opamp, filter, I/V converter, buffer? AD8610 is good (better) but slightly noisier and can take max +- 13 volts, only in SMD SO08. Check for amps with noise less than 6 nV/sqr Hz and sr > 10 V/us __________________ /Per-Anders (my first name) or P-A as my friends call me

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18th December 2003, 11:59 PM	#2
KevinLee diyAudio Member Join Date: Oct 2002 Location: Winnipeg MB Canada	You might want to look at the AD8610/AD8620. Some like LM6172 or AD826, they are dual package though. There is a new AD piece called AD8065, I have not heard anything at all about it. I like both OPA627 and AD8610/20. There is nothing better than trying a few different types and making your own decision. Good luck KevinLee

19th December 2003, 12:40 AM	#3
tool49 diyAudio Member Join Date: Apr 2003 Location: Montreal	I second KevinLee's choice of AD8610/AD8620. I would not suggest to go much lower in price range as you might find that the quality difference by the few extra dollars is well worth it. Hope this helps! Sébastien

20th December 2003, 08:42 PM	#5
Ryssen diyAudio Member Join Date: Dec 2003 Location: Sweden--> Here	There are 2 OPA627 in the shematic, the first one is for I/V converter,then there´s a filter then another OPA627 as buffert.

21st December 2003, 03:01 PM	#6
PMA diyAudio Member Join Date: Apr 2002 Location: Prague, Kitakyushu, Fukuoka	How about LM741?

21st December 2003, 03:15 PM	#7
Ryssen diyAudio Member Join Date: Dec 2003 Location: Sweden--> Here	Yes, the LM741.I guess you are using it?

21st December 2003, 06:02 PM	#9
mlloyd1 diyAudio Member Join Date: Feb 2001 Location: illinois	you guys are missing out on audio nirvana: the LM709 very rare now, nobody wants to part with theirs :-) Seriously, I've been seeing some folks very interested in the LT1363 (I think that's the right number). I haven't tried it myself yet, but I have a buddy that REALLY like it IN SOME APPLICATIONS. NOTE: it is not a JFET input device; sometimes that matters. mlloyd1

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