Ad8620

roibm · 17th March 2004, 12:06 AM

Hi

I read that the voltage for the AD8620 is +-5 to +-13V, but I would like to use it for replacing some opamps which work with +-15V
Do you think I will run into problems with this? Will it blow?

Do you have any recommandation for a good dual opamp?

Any other idea?

Thanks

mandat · 18th March 2004, 08:47 AM

I think that OPA2604 fulfils your expectation. Look at Analog Devices home page for data & application notes
http://www.analog.com

mandat · 18th March 2004, 09:35 AM

erratum
focus.ti.com/docs/prod/folders/print/opa2604.html

peranders · 18th March 2004, 09:51 AM

I have used AD8610 in my QRV-04 headphone amp for a year now at +- 15 volts and it still works. I'll think it will work to 94.36% certainty.

My opinion about AD8610, 8620 is

roibm · 18th March 2004, 10:43 AM

pop peranders: my opinion about them is "hit me baby one more time!"

I think I will try them, and if it smokes, that's life

pop mandat: OPA2604 is something I never tried. Any idea how it compares to the AD8620?

push me: thanks for your feedback

mandat · 18th March 2004, 02:04 PM

I have used OPA604 as a driver followed by four pairs of 2SC3944/2SA1535 transistors working in my A class headphone amp. It sounds really great. Due to the large output current OPA604 works very efficiently in output stages. When you need less efficient op-amp try OPA132. Both op-amps are similar in terms of the sonic quality.
Some information about sonic quality of the most popular op-amps you find below.
http://tangentsoft.net/audio/opamps.html

roibm · 18th March 2004, 02:41 PM

great link... thank you very much

I will use them just after the DAC, so I don't know if your case is the same with mine.
What do you think?

hjelm · 18th March 2004, 03:06 PM

Krishu here at diyaudio thinks the 8620 is superiour to the 2604 in a Pioneer CD player he modified.

See his comments on his webpage, look for the CD modifications.

Krishu

mandat · 18th March 2004, 05:50 PM

A kind of op-amp used is determined by an application. In The First MkII, which is a DIY DAC, in the output stages (after DAC unit which comes from Crystal) OPA637 and BUF634 op-amps are used and good sound was obtained.

roibm · 22nd March 2004, 11:32 AM

I had some 2604 to play with, and compared them to OPA2132P in +-15V environment.
I like OPA2132P better. More details... Maybe this has something to do with the high gain for the OPA2132P.

Anyone experienced something similar?

17th March 2004, 12:06 AM	#1
roibm Banned Join Date: Dec 2003 Location: Transylvania	Ad8620 Hi I read that the voltage for the AD8620 is +-5 to +-13V, but I would like to use it for replacing some opamps which work with +-15V Do you think I will run into problems with this? Will it blow? Do you have any recommandation for a good dual opamp? Any other idea? Thanks

18th March 2004, 09:51 AM	#4
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	I have used AD8610 in my QRV-04 headphone amp for a year now at +- 15 volts and it still works. I'll think it will work to 94.36% certainty. My opinion about AD8610, 8620 is __________________ /Per-Anders (my first name) or P-A as my friends call me

18th March 2004, 03:06 PM	#8
hjelm diyAudio Member Join Date: Nov 2003 Location: Västerås	Krishu here at diyaudio thinks the 8620 is superiour to the 2604 in a Pioneer CD player he modified. See his comments on his webpage, look for the CD modifications. Krishu __________________ Hjelm

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18th March 2004, 08:47 AM	#2
mandat diyAudio Member Join Date: Oct 2003 Location: Gliwice	I think that OPA2604 fulfils your expectation. Look at Analog Devices home page for data & application notes http://www.analog.com

18th March 2004, 09:35 AM	#3
mandat diyAudio Member Join Date: Oct 2003 Location: Gliwice	erratum focus.ti.com/docs/prod/folders/print/opa2604.html

18th March 2004, 10:43 AM	#5
roibm Banned Join Date: Dec 2003 Location: Transylvania	pop peranders: my opinion about them is "hit me baby one more time!" I think I will try them, and if it smokes, that's life pop mandat: OPA2604 is something I never tried. Any idea how it compares to the AD8620? push me: thanks for your feedback

18th March 2004, 02:04 PM	#6
mandat diyAudio Member Join Date: Oct 2003 Location: Gliwice	I have used OPA604 as a driver followed by four pairs of 2SC3944/2SA1535 transistors working in my A class headphone amp. It sounds really great. Due to the large output current OPA604 works very efficiently in output stages. When you need less efficient op-amp try OPA132. Both op-amps are similar in terms of the sonic quality. Some information about sonic quality of the most popular op-amps you find below. http://tangentsoft.net/audio/opamps.html

18th March 2004, 02:41 PM	#7
roibm Banned Join Date: Dec 2003 Location: Transylvania	great link... thank you very much I will use them just after the DAC, so I don't know if your case is the same with mine. What do you think?

18th March 2004, 05:50 PM	#9
mandat diyAudio Member Join Date: Oct 2003 Location: Gliwice	A kind of op-amp used is determined by an application. In The First MkII, which is a DIY DAC, in the output stages (after DAC unit which comes from Crystal) OPA637 and BUF634 op-amps are used and good sound was obtained.

22nd March 2004, 11:32 AM	#10
roibm Banned Join Date: Dec 2003 Location: Transylvania	I had some 2604 to play with, and compared them to OPA2132P in +-15V environment. I like OPA2132P better. More details... Maybe this has something to do with the high gain for the OPA2132P. Anyone experienced something similar?

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