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Old 25th December 2007, 01:25 PM   #1
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Default old Burr Brown Op Amps

What is inside those BB opamps ? Discrete ? Any good ?

The equipment where I found those inside had a bandwith > 200 kHz

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Old 26th December 2007, 04:09 PM   #2
gootee is offline gootee  United States
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The Burr-Brown "Discontinued Products" sheet lists the OPA602AM as a replacement for the 3308/12C.

I found the discontinued products sheet here:

http://www.ortodoxism.ro/datasheets/...wn/mXxsttr.pdf
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Old 26th December 2007, 06:09 PM   #3
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Unisonic UTC3308
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Old 26th December 2007, 08:26 PM   #4
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Quote:
Originally posted by jacco vermeulen
Unisonic UTC3308
Unisonic is a modern dual opamp with single supply, that BB is single opamp with dual voltage supply.
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Old 26th December 2007, 08:27 PM   #5
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Quote:
Originally posted by gootee
The Burr-Brown "Discontinued Products" sheet lists the OPA602AM as a replacement for the 3308/12C.

I found the discontinued products sheet here:

http://www.ortodoxism.ro/datasheets/...wn/mXxsttr.pdf
I think I will try it just for fun. The pcb on the picture is a complete line buffer with discrete output stage inside feedback loop.
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Old 29th December 2007, 03:47 AM   #6
BrianL is offline BrianL  United States
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This is a hybrid. Thus the insides are discrete components on a substrate which is then potted.
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Old 2nd September 2012, 06:28 PM   #7
WSJ is offline WSJ  United States
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Burr Brown, Intech, Analog Devices, Teledyne Philbrick, and others manufactured discrete op-amps. In the 70's, at Intech, I designed and characterized a variety of descrete op-amps and designed production test fixtures. The A-148A is a JFET input op-amp with a Bandwidth of 10 MHz. The 990 discrete op-amp circuit is ventrally identical to the A-148A with the exception of the JFET input and a few improvements.

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The RIAA amplifier board has two A-148A’s on a 22-pin Vecotor board. It has been in use for over 42 years.

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Old 8th April 2013, 08:09 PM   #8
berl is offline berl  France
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Quote:
Originally Posted by WSJ View Post
In the 70's, at Intech, I designed and characterized a variety of descrete op-amps and designed production test fixtures.
Dear WSJ,
I have a pair of Intech A-100 and I have not found any datasheet on the web. That's not a problem for building an audio circuit with it, but could you please let me know its max. V+/V- if you know this "beast"? Thanks, Bernard
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Old 7th May 2014, 11:20 AM   #9
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Default Old Intech Part Info?

Quote:
Originally Posted by WSJ old Burr Brown Op Amps

In the 70's, at Intech, I designed and characterized a variety of descrete op-amps and designed production test fixtures.
Dear WSJ,

I need to find replacement op amp for Intech A-440. The problem is that I cannot find any specs or the datasheet on the internet. Is there a chance you can post or send me some info for this component?

Thanks in advance
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Old 8th May 2014, 05:52 AM   #10
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Originally Posted by WSJ View Post
In the 70's, at Intech, I designed and characterized a variety of descrete op-amps and designed production test fixtures.
Very interesting--do you still have schematics or datasheet for these products? I'd love to see them!

Samuel
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