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Replacement for OPA603?
Replacement for OPA603?
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Old 22nd October 2003, 09:58 AM   #1
Onvinyl is offline Onvinyl
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Default Replacement for OPA603?

Hi,
as you might know, the opa603 (current-feedback) is discontinued. Is there a direct replacement you happen to know about?
greets,
Rüdiger
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Old 22nd October 2003, 10:30 AM   #2
Arti is offline Arti  Poland
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Hi
I had the same problem for one of my projects. In AD told me direct replacement is AD811 but I danno it is still avaliable
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Old 22nd October 2003, 10:50 AM   #3
peranders is offline peranders  Sweden
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Replacement for OPA603?
If you could tell us where you have it or even a schermatics it would be easier to suggest something.
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Old 22nd October 2003, 10:57 AM   #4
Christer is offline Christer  Sweden
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Recommended replacement according to TI is THS3061, but
they note it is not pin-compatible and may differ in parameters.

http://focus.ti.com/docs/prod/produc...ection=rep_dev
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Old 22nd October 2003, 10:59 AM   #5
Onvinyl is offline Onvinyl
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Default It's the beast...

...
http://www.klaus-boening.de/html/laboheme.html

Rüdiger
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Old 22nd October 2003, 11:02 AM   #6
Onvinyl is offline Onvinyl
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@Christer

... and it's smd, I think. I'm hardwiring, so it's hardly an option...

currently, I'm checking el2160 (datasheet only, of course...)
Rüdiger
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Old 22nd October 2003, 11:47 AM   #7
Elso Kwak is offline Elso Kwak  Philippines
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Exclamation AD811

Hi, AD811 still available but sound is different from OPA603.
Beware this is a extremely wide bandwith device and needs proper supply decoupling and cooling.
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Old 22nd October 2003, 12:51 PM   #8
Onvinyl is offline Onvinyl
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Hi Elso,
are you talking about a 'sonic footprint' of the ad811 irrespective of an actual circuit? If so, could you describe the differences?
Rüdiger
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Old 22nd October 2003, 12:59 PM   #9
peranders is offline peranders  Sweden
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Replacement for OPA603?
I think you can test just about any good performing CBF opamp. Notice that Walt Jung or one of his cowriters has described how you connect a transformer in order to get lower distortion. It's in this book
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Old 22nd October 2003, 01:19 PM   #10
Holger Barske is offline Holger Barske  Germany
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Rüdiger,
I have been talking to Klaus concerning this issue. We both think National LM6181 would be worth a try.
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