OPA549/541 at unity gain - schematic needed. - diyAudio
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Old 22nd September 2007, 09:26 AM   #1
nina is offline nina  United Kingdom
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Default 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!
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Old 22nd September 2007, 04:20 PM   #2
Minion is offline Minion  Canada
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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
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Old 22nd September 2007, 04:22 PM   #3
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The OPAs are unity gain stable, and all the info you need is in the datasheet.
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Old 24th September 2007, 02:46 PM   #4
nina is offline nina  United Kingdom
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Thank you very much!
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