OPA549/541 at unity gain - schematic needed.

nina · 22nd September 2007, 09:26 AM

Hi,

Could any one show me the schematic of OPA549 at unity gain esp. on the value R feedback? Also, any special concerns in running this consition?

Thanks in advance!

Minion · 22nd September 2007, 04:20 PM

Calculateing gain for the OPA549 is the same as for any opamp, but make sure that the OPA549 is unity gain stable as many power amp IC"s are not unity gain stable, check the datasheet....

Here is a calculator for calculateing gain:

http://www-k.ext.ti.com/srvs/cgi-bin...obj(32618),new

Make sure that you select the correct setting for inverting or noninverting configs....

Cheers

pinkmouse · 22nd September 2007, 04:22 PM

The OPAs are unity gain stable, and all the info you need is in the datasheet.

nina · 24th September 2007, 02:46 PM

Thank you very much!

22nd September 2007, 09:26 AM	#1
nina diyAudio Member Join Date: Apr 2005 Location: Earth	OPA549/541 at unity gain - schematic needed. Hi, Could any one show me the schematic of OPA549 at unity gain esp. on the value R feedback? Also, any special concerns in running this consition? Thanks in advance!

22nd September 2007, 04:22 PM	#3
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	The OPAs are unity gain stable, and all the info you need is in the datasheet. __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

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22nd September 2007, 04:20 PM	#2
Minion diyAudio Member Join Date: May 2006	Calculateing gain for the OPA549 is the same as for any opamp, but make sure that the OPA549 is unity gain stable as many power amp IC"s are not unity gain stable, check the datasheet.... Here is a calculator for calculateing gain: http://www-k.ext.ti.com/srvs/cgi-bin...obj(32618),new Make sure that you select the correct setting for inverting or noninverting configs.... Cheers

24th September 2007, 02:46 PM	#4
nina diyAudio Member Join Date: Apr 2005 Location: Earth	Thank you very much!