Chip indentifying...

I recently got a bunch of chips for my fathers work (military research, so they must be pretty good), so I thought there's got to be something I can use them for. And I was wondering if anyone could help me identify one (ie tell me what it does, or point me to a product data sheet). It's a burr-brown part, 3573AM. Other markings on it are:

BeO
9118
AF1506
 

paulb

Member
2001-06-01 4:53 pm
Calgary
Looks like it's a high power op amp, now obsolete. I found this mention in the OPA541 data sheet.
"The OPA541 can be used in applications currently using various hybrid power amplifiers, including the OPA501, OPA511, OPA512, and 3573." Pinout is same as OPA541.
However, it also crosses over to the Apex PA73, whose datasheet states:
"The PA73 has a simple class C output stage (see Note 1) to reduce cost for motor control and other applications where crossover distortion is not critical and to provide interchangeability with type 3573 amplifiers."
See http://www.teamapex.com/products/pages/op_amps/pa01pa73.html
So it doesn't look very appealing for audio applications.
 

paulb

Member
2001-06-01 4:53 pm
Calgary
You can build a regulated power supply, or something similar to a capacitance multiplier. Or a supply splitter to derive a +/- from a single-ended supply.
Actually, you could build a subwoofer amplifier too, distortion was reasonably low at low frequencies.
Take a look at the app notes at that Apex web site for ideas.