op-amp supply voltage

arthur · 3rd June 2008, 11:07 AM

i am going to make a simple preamp with opamp such as opa627,what is the optimal supply voltagecan give the best sound quality

many thanks
Arthur

Nuuk · 3rd June 2008, 12:58 PM

I prefer +/-18v with the OPS627.

arthur · 3rd June 2008, 05:43 PM

if i can only have +- 9v ,what op amps are more suitable?
Thanks in advance.

Nuuk · 3rd June 2008, 06:27 PM

I can't really comment as I have never used those voltages. I have used the OPA134 down to +/-12v so that may be worth a try!

satoru · 3rd June 2008, 07:22 PM

Hi,

LME49710 is specified from Â±2.5V supply and it is a nice low-distortion OP-AMP. People tends to prefer higher voltage for more dynamic range above the noise floor (which is fixed by the temperature, etc).

Good luck with your project!
Satoru

cpemma · 4th June 2008, 04:15 PM

You may find this list useful, though note the application is headphone amps.

KP11520 · 4th June 2008, 05:35 PM

Tangentsoft (see previous post) also sells something you can use for a PS.

http://tangentsoft.net/shop/

Search the whole site. Lots of good info and the 627 gives great results if you design the circuit correctly with optimum voltage. Do your research!

Regards//Keith

3rd June 2008, 11:07 AM	#1
arthur diyAudio Member Join Date: Oct 2001 Location: .	op-amp supply voltage i am going to make a simple preamp with opamp such as opa627,what is the optimal supply voltagecan give the best sound quality many thanks Arthur

3rd June 2008, 12:58 PM	#2
Nuuk diyAudio Member Join Date: Feb 2003 Location: Somerset, SW England	I prefer +/-18v with the OPS627. __________________ The truth need not be veiled, for it veils itself from the eyes of the ignorant.

3rd June 2008, 06:27 PM	#4
Nuuk diyAudio Member Join Date: Feb 2003 Location: Somerset, SW England	I can't really comment as I have never used those voltages. I have used the OPA134 down to +/-12v so that may be worth a try! __________________ The truth need not be veiled, for it veils itself from the eyes of the ignorant.

4th June 2008, 05:35 PM	#7
KP11520 diyAudio Member Join Date: Apr 2007	Tangentsoft (see previous post) also sells something you can use for a PS. http://tangentsoft.net/shop/ Search the whole site. Lots of good info and the 627 gives great results if you design the circuit correctly with optimum voltage. Do your research! Regards//Keith __________________ If Wile E. Coyote had enough money to buy all that ACME ****, why didn't he just buy dinner?

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3rd June 2008, 05:43 PM	#3
arthur diyAudio Member Join Date: Oct 2001 Location: .	if i can only have +- 9v ,what op amps are more suitable? Thanks in advance.

3rd June 2008, 07:22 PM	#5
satoru diyAudio Member Join Date: Jan 2007 Location: Berkeley, California	Hi, LME49710 is specified from Â±2.5V supply and it is a nice low-distortion OP-AMP. People tends to prefer higher voltage for more dynamic range above the noise floor (which is fixed by the temperature, etc). Good luck with your project! Satoru

4th June 2008, 04:15 PM	#6
cpemma diyAudio Member Join Date: Jul 2003 Location: S Yorkshire OK	You may find this list useful, though note the application is headphone amps.

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