[S_Dedalus]

I got a pair of these in DIP form, as well as the dual channel version in soic form. I have to say, compared to the opa627's you can definately tell these are faster chips, instrument separation is better, and smaller details are improved. At the same time bass gets a little bigger, more punchy, and the mids and highs come forward a bit. They do seem to amplify the PS noise more than the 627s, and I was wondering if this is related to their higher operating frequency?

 

[JohnFerrier]

hehehe... Does one chip sound juicier than the other?



JF

 

[S_Dedalus]

Right now, I'm not running with the best set up, I cooked a buffer stack, and need to split the other one, so I'll have better info on how I like the chip

 

[roadbuster]

Quote:

Originally Posted by S_Dedalus They do seem to amplify the PS noise more than the 627s, and I was wondering if this is related to their higher operating frequency?

Probably not. The increased noise may be due to the fact that the LT1363
has a worst-case input offset voltage of 1.5mV and input bias current of 2uA
while the OPA627 only has errors of 0.1mV and 5pA, respectively. As well,
the typical noise levels on the OPA627 at 10KHz is 4.5nV/sqrt(Hz), while it's
double that on the LT1363.

Given this, I'm fairly sure that I wouldn't want to use the linear tech op-amp
for any of my audio amplifiers. I bet it's pretty expensive, too.