old Burr Brown Op Amps

[Bernhard]

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

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

[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

[jacco vermeulen]

Unisonic UTC3308

[Bernhard]

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.

[Bernhard]

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.

[BrianL]

This is a hybrid. Thus the insides are discrete components on a substrate which is then potted.

[WSJ]

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.



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

[berl]

Originally Posted by WSJ

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