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Old 28th December 2013, 02:09 PM   #1
diyAudio Member
Join Date: Oct 2011
Location: Tauberbischofsheim, Germany
Default OPA445 - Alternatives available?


is there any more economic opamp available which is comparable to Burr-Brown's OPA445? It should feature FET inputs and an extended supply voltage range.

Otherwise, is there any workaround to give extended output swing to a common, cheap FET input opamp?

Best regards!
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Old 28th December 2013, 02:23 PM   #2
DUG is offline DUG  Canada
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Join Date: Jan 2003
Location: mississauga ontario canada
OPA551 goes to +/- 30V

But more output current.
Doug We are all learning...we can all help
"You can't stop the signal, Mal. Everything goes somewhere..."
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Old 28th December 2013, 03:55 PM   #3
jcx is offline jcx  United States
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what V,I is needed? - LTC6090 is a 140 V high Vsupply CMOS op amp but only smt as usual for new parts today

for audio power TDA7293 takes higher Vsupply than most chip amps

if only increased output swing is needed then bridged outputs double the output V
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