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/BurrBrown/mXxsttr.pdf

 

[jacco vermeulen]

Unisonic UTC3308

 

[Bernhard]

Unisonic UTC3308

Unisonic is a modern dual opamp with single supply, that BB is single opamp with dual voltage supply.

 

[Bernhard]

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/BurrBrown/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]

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

 

[peripteras1979]

Old Intech Part Info?

Originally Posted by WSJ http://www.diyaudio.com/forums/parts/114219-old-burr-brown-op-amps.html#post3149469

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

 

[Samuel Groner]

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

 

[Apex Jr]

Burr Brown:
3013/15
3025/15
1542/25
PWR 71
PWR 204
PWR 411
PWR 717A