PMA said:
OPA211 and OPA827. New generation opamps, OPA827 is JFET input and has under 4nV/rtHz noise. Ideal for a MM preamp, in particular if you parallel them. OPA211 is 1nV/rtHz and precision.
ADA4898 seems to be amazing as well, I hope to get some samples to evaluate.
It is important to compare 'specs' in each op amp to understand why I can't find the perfect solution in IC's.
john curl said:
Not sure how much you are searching for IC solutions, but I'm pretty sure you don't want to find any. After all, why would you want to admit that the rest of the world didn't got stuck forty years ago?
Wavebourn said:
As far as I know, they won't do OPA1611/OPA1612 anytime soon. OPA211/OPA2211 is the direct replacement. You can get OPA211 samples, but not OPA2211 (the dual version).
syn08 said:
Thanks, they look very similar, but guys promised DIP version for prototyping.
john curl said:
Not in case of diamond buffer.
john curl said:
If you really can't live without that, add an OPA633 at the output. Diamond buffer, ten times larger Iq and very little phase shift to keep the loop stable.
Oh wait, you don't want any NFB
syn08 said:
If you really can't live without that, add an OPA633 at the output. Diamond buffer, ten times larger Iq and very little phase shift to keep the loop stable.
Oh wait, you don't want any NFB
I have couple of PCBs with ten of LH0002CH on each. Very audiophile looking metal cases...
Wavebourn said:
About to be discontinued. LME49600 is the successor, with even better performance.
syn08 said:
I don't mean performance, I mean appearance. 😀
I don't like performances of diamond buffers.
LH0002 are overkill, so to speak, but the first diamond buffer that I ever saw. About 40 years old. Have a few, myself, somewhere.
Some people just can't understand the difference between a class A output stage and a class A-B output stage. I prefer class A in all my preamp designs, IF possible. Why have anything less?
- Status
- Not open for further replies.