Usually mentioned specifically as one of the main features... if not you have to read through the data sheet. There's no "parameter" as such in the specs that indicates it is or isn't... although words such as "internally compensated" usually mean it is, and devices that have "external compensation" usually aren't.
http://www.datasheetcatalog.org/datasheet/BurrBrown/mXtutss.pdf
http://www.datasheetcatalog.org/datasheet/BurrBrown/mXtutss.pdf
The OPA2604 covers most bases having a supply range of -/+4.5 to 24 volts, 600 ohm drive capability and good (it's docile to work with) stability.
As a replacement for the OPA627 (on dual adapters as the OP uses them) I feel it it should operate perfectly in a DAC whether used as I/V conversion/filter buffer etc.
If you want to retain the single devices and adapter use the OPA604
Whether the OP can hear any difference subjectively will be interesting to know.
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Sorry, yes, a schematic will help:
http://www.diyaudio.com/forums/digi...ved-my-wolfson-4-0-biy-dac-2.html#post2175263
http://www.diyaudio.com/forums/digi...ved-my-wolfson-4-0-biy-dac-2.html#post2175263
OPA604 should be perfect. When you mentioned using adapters thought you meant making a dual out of two single SMD devices.
Read the last part of this data sheet "sound quality",
http://www.datasheetcatalog.org/datasheet/BurrBrown/mXyzsxss.pdf
that's Burr Browns take on it... in use I have found it offers excellent sonics, can't really say more than that... only you will know if you hear/detect/like the device.
Read the last part of this data sheet "sound quality",
http://www.datasheetcatalog.org/datasheet/BurrBrown/mXyzsxss.pdf
that's Burr Browns take on it... in use I have found it offers excellent sonics, can't really say more than that... only you will know if you hear/detect/like the device.
OK thanks, I'll give them a go. I tried out the LME49710NA (as you can read in that thread), but did not notice a huge difference, so it should be interesting to try the OPA604 and compare it with both the OPA627 and LME49710NA.
I don't think there are many other candidates there that would be suitable opamps. I'm leaving the four OPA627 in the filter stage as it's too expensive to replace all 6 chips!
I don't think there are many other candidates there that would be suitable opamps. I'm leaving the four OPA627 in the filter stage as it's too expensive to replace all 6 chips!
The BUF634 isn't an opamp as such
and certainly can not replace the OPA134. http://www.datasheetcatalog.org/datasheet/BurrBrown/mXtxtvx.pdf
I'm using lordearls link above for the circuit post #13,
http://www.diyaudio.com/forums/digi...eived-my-wolfson-4-0-biy-dac.html#post2175263
good timing, got some OPA604 from Farnell, playing as we speak - not really noticeable differences yet (didn't imagine there would be as the BB sound signature is widely the same across their opamps - but these are a cheap opamp, so what the hey!)
What about the LME49600 - would they work on some kind of adapter?
What about the LME49600 - would they work on some kind of adapter?
The BUF634 isn't an opamp as such
http://www.datasheetcatalog.org/datasheet/BurrBrown/mXtxtvx.pdf
I'm using lordearls link above for the circuit post #13,
http://www.diyaudio.com/forums/digi...eived-my-wolfson-4-0-biy-dac.html#post2175263
i know this, but I had made a wrong assumption that the OPA134 was being used as a buffer/line driver as it can often be found in this position (wasnt looking at the schematic). its at the output after what seemed to be the IV, but because if the 4 dac chips there is a separate summing stage I failed to think of
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