[jcw122]

Hi everyone,

I'm planning on building my first headphone amp soon (CMoy) and I'm looking to buy a few different Op Amps to play around with.

I'm having trouble finding a place that carries a all of the stuff I'm looking for as I don't want to buy from separate places and get slammed with handling charges.

I have the OPA2132PA so far, but I'm also looking for a place to buy the AD8066, and OPA2227. I'm also seeing alot of odd additions to the model numbers when I'm finding them on websites. Like Digi-key shows the OPA2227 as "OPA2227PA-ND" and I'm not sure if this is the right thing. Digi-Key also says it supplies a bunch of different AD8066's and I'm very confused by which one to get (there are like 15 different things listed).

Thanks.

 

[balou]

opa2227 seems only available at mouser...
the different postfixes usually have to do with:
-package. soic-8, pdip-8, cerdip, mssop, etc
-temperature range. commercial (about 0-85°c, depending on interpretation), industrial or military (-55 - 125c°)
-different specs. burr brown has for example some versions with better DC voltage specs (useless in audio - so buy the cheaper one).
-outer packaging. some variants are packed on a tape, for automatical placement on pc boards

OPA2132PA - p means pdip package, a means worse dc specs (doesn't matter in audio, but price for the A version is sometimes only half of the non-A version!)

pleeeaaaasee get at least one AD chip, else you might start to think that all this talking about amps is way to overrated (I started to think so...)

 

[el_matt0]

so which of these two AD8066s would i want to grab.
http://www.digikey.com/scripts/DkSea...428315&Site=CA

OR

http://www.digikey.com/scripts/DkSea...428317&Site=CA

those are the only two AD8066s that digikey has in stock. i THINK the second one is the one i want, but im not 100% sure, can someone confirm this?

 

[balou]

yes, the second one is in soic-8 package. mssop isn't really used in diy projects, except if you want to build the worlds smallest cmoy

 

[jcw122]

Thanks for the help guys, and yeah i'm definitely grabbing an AD chip, probably the AD8066.

 

[jcw122]

http://sales.digikey.com/scripts/sal...emseq=48931190

I found the OPA2227 on Digi-Key, is this the right one?

 

[Joshatdot]

Digi-Key OPA2227 8-DIP Part Number: OPA2227PA-ND

 

[jcw122]

Quote:

Originally Posted by Joshatdot /img/forum/go_quote.gif Digi-Key OPA2227 8-DIP Part Number: OPA2227PA-ND

Gotcha thanks.