"I recently tried 2604's in a crossover design, but
I found them only marginally stable in low gain
circuits, and I went right back to discrete." A while back Analog Devices was having a problem with their AD797s.Supposed to be unity gain stable.They weren't.Just return to the distributor and get a different date code.On a scary note I have a circuit that uses the AD842 at unity gain.This is not a unity gain stable part.About 1/3 of the date codes will actually work over temperature.Don't try this at home.
I found them only marginally stable in low gain
circuits, and I went right back to discrete." A while back Analog Devices was having a problem with their AD797s.Supposed to be unity gain stable.They weren't.Just return to the distributor and get a different date code.On a scary note I have a circuit that uses the AD842 at unity gain.This is not a unity gain stable part.About 1/3 of the date codes will actually work over temperature.Don't try this at home.
Tried the LM6172 in my CDP (i/u conv. + filter) and found it much better sounding than the opa2134 if it is stable.
Here my personal ranking (tested in outputstage, gain 10):
Standard: NE5532, JRC...
For Beginners: OPA2604
Better: OPA2134; OP275
Premium: OPA2132
State of the Art: LM6172, OPA627/637, AD797 (the latter three are single opamps)
Here my personal ranking (tested in outputstage, gain 10):
Standard: NE5532, JRC... For Beginners: OPA2604 Better: OPA2134; OP275 Premium: OPA2132 State of the Art: LM6172, OPA627/637, AD797 (the latter three are single opamps)
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