Originally Posted by Pluto2
But what happened to your beloved LT1355?
And you don't like lt1352, why? Is opa2211 good for filtering, I thought the input current was not low, yes? ..
I'm listening to my DAC with the LT1355 still inside... Sounds great.
I didn't suggest it just because the higher quiescent current of the LT1358 and LT1364 may make them more suitable for driving heavy loads well (just in case).
While for filtering the LT1355 may not have a input current low enough. Yes the OPA2211 has low input bias current, equal to that of the LT1352. The LT1469 has it even lower, as low as the LME's.
I don't recommend the LT1352 because comparing the various steps of 'speed reduction' by lowering the internal bias levels, i.e. comparing the graphs in the datasheets
, it is obvious that the LT1352 doesn't have a quiescent current that allows for the best distortion performance of this series's topology. It looks like the LT1357/8 and LT1354/5 are the sweet spot (for line level applications at least). I prefer the neutrality of the LT1355 to the slight exhuberance of the LT1358.