where to get socketed OPA2227 op amp?

[appar111]

I'm thinking of doing a little opamp rolling in my recently acquired Transit, and wondered where I should go for this particular opamp. I know it needs to be socketed, and I tried Digikey, but I don't know which one is the right one to get (they listed a half a dozen different OPA2227's (OPA2227P, OPA2227PA, OPA2227U, OPA2227UA, OPA2227U/2K5, OPA2227UA/2K5).

Can anyone help out? I'm not sure if this should be in the amp forum or not, so I'll post it in the DIY forum as well.

thanks in advance!

 

[guzzler]

it's the amp which needs to be socketed, not the chip. The chip comes in a variety of packages, with the one you need being the DIP version, denoted by the 'P' suffix. 'PA' is a higher DC grade version and won't be worth the extra cost. 2K5 means that they come on reels of 2500, and 'U' chips are SO8

you need OPA2227P

g

 

[Earwax]

Quote:

Originally Posted by guzzler it's the amp which needs to be socketed, not the chip. The chip comes in a variety of packages, with the one you need being the DIP version, denoted by the 'P' suffix. 'PA' is a higher DC grade version and won't be worth the extra cost. 2K5 means that they come on reels of 2500, and 'U' chips are SO8 you need OPA2227P g

P? The PA is less expensive than the P and currently in stock at Digikey.

OPA2227PA is the one I went with for my CMOY.

Apar111, the type that fits into a socket is called "8-DIP" in the Digikey listings.

 

[appar111]

Ahhh, thanks very much for the info!

The amp currently has an AD8620 in it, and sounds fantastic, but I've heard good things about the Burr Brown op amps. Did Texas Instruments acquire them or something? I thought that the OPA2227 was a Burr Brown, but it turns out its a Taxas Instruments (?). Anyhoo, I've heard the OPA2227 is supposed to be a very warm, yet detailed opamp. How would it compare to the 8620?

You'll have to pardon me-- confused opamp n00b here...

 

[guzzler]

TI acquired them years ago, but things are still traded under the Burr Brown name, as it's synonymous with quality audio.

Many describe the AD86x0 to be more analytical, faster, and a more prominent treble, while the BB house sound is more laid back, less edge, but still retaining detail. Do a search, there's enough on this to fill a small llama farm...

g

 

[appar111]

For $3.96 and shipping costs, what can it hurt to try, right? Are there any other options that would work with a 2 9V Headsave Transit besides the 8620 and the 2227?

 

[guzzler]

more or less any dual opamp will work in a META42, which is what the transit is. The lowest bandwidth opamp you'll want to try is 8MHz, going all the way up to the top end of what the META will take, being the OPA637 with a GBP of 80. However, contact HeadSave to find out what the gain in your amp is, as the OPA637 needs a gain greater than 5 to be stable, or try the OPA627. The super fast chips like the LM6172 or AD8065 might work, but you'll likely have problems with them oscillating...

g

 

[appar111]

Handling cost at Digikey is $5 and $2-4 for shipping. So around $10 for one OPA2227 opamp-- yikes! But I checked the price of the AD8620 and it's $13.33 without figuring shipping or handling into the picture.

I'm wondering if I would even be able to hear a big difference between the two?

 

[PinkFloyd]

Quote:

Originally Posted by appar111 For $3.96 and shipping costs, what can it hurt to try, right? Are there any other options that would work with a 2 9V Headsave Transit besides the 8620 and the 2227?

Yes.

AD823AN
AD826AN
AD712JN
OPA2132PA
OPA2228P
OPA2604AP
OPA2134PA
OPA2111KP
LM353

To name but a few.

I've commented on a few of these at http://www.rock-grotto.co.uk/opamp.htm they were tested in the Chiarra amp but the sonic signatures will be pretty much the same in any amp.

Burr Brown generally sweet, rich and chocolaty. AD generally raw, open and detailed.

I've got almost every dual chip (dip8) known to mankind (brand new) so if you want to try out a good selection PM me and I can sort you out a selection at a "very" cheap price including shipping to the states.

All the best.

Pinkie.

 

[PinkFloyd]

Quote:

Originally Posted by appar111 Handling cost at Digikey is $5 and $2-4 for shipping. So around $10 for one OPA2227 opamp-- yikes! But I checked the price of the AD8620 and it's $13.33 without figuring shipping or handling into the picture. I'm wondering if I would even be able to hear a big difference between the two?

If you're going for the AD8620AR you'll need a SO-8 to DIP-8 adapter as the AD8620AR comes in a SOIC package. Tangent sells the AD8620AR on an adaptor for $16 or $12 for it without the adaptor...... you're best to buy the AD8620 on the browndog adaptor at that price. http://tangentsoft.net/audio/shop/ He also accepts Paypal and is a great guy to deal with.

AD8620 V OPA2227 ? No comparison, the AD8620 would be my choice but it's your ears that will be listening and you may prefer the OPA2227.

Warning....... opamp rolling can become an obsession

All the best.

Pinkie.

 

[appar111]

AD8620 that much better huh? I take it you prefer the raw, detailed sound of it over the rich, chocolatey texture of the Burr Brown?

Right now I've already got the AD8620 in the amp, so I guess I'm set! I still may end up swapping a Burr Brown in there, just to see the subtle difference. I listen to alot of rock, but don't find the 8620 to be too bright at all-- just really detailed.

The setup will be: ipod mini --> JMT super silver mini-mini IC --> Headsave Transit with AD8620 --> Sportapros/MX400's (soon to be something else... DT770 80 ohm perhaps?)

 

[PinkFloyd]

Quote:

Originally Posted by appar111 AD8620 that much better huh? I take it you prefer the raw, detailed sound of it over the rich, chocolatey texture of the Burr Brown? Right now I've already got the AD8620 in the amp, so I guess I'm set! I still may end up swapping a Burr Brown in there, just to see the subtle difference. I listen to alot of rock, but don't find the 8620 to be too bright at all-- just really detailed. The setup will be: ipod mini --> JMT super silver mini-mini IC --> Headsave Transit with AD8620 --> Sportapros/MX400's (soon to be something else... DT770 80 ohm perhaps?)

Who said "bright"?

I said "raw, open and detailed" that's the way it should sound

 

[PinkFloyd]

If you like your sound to perform like the makeup on your face (masked and rose tinted) then go down the 2227 route

 

[ITZBITZ]

Don't write off the OPA2227. I think it's a very good sounding, affordable op-amp, particularly in comparison to the OPA627. I've never been fond on the AD8610, in the PIMETA or PPA configuration.

It is certainly better than the OPA2134 and OPA2132. I find the sound very clear, detailed and with decent top-end.

 

[Kenny12]

how about the 2228 its only 1 number diffferent