Which chips are out there?

[Mayday]

Which are the chips out there that are suitable for chipamps?

Manufacturer of each chip is appreciated.

Thanks!

/Mayday

[Arx]

Originally posted by Mayday
Which are the chips out there that are suitable for chipamps?

Manufacturer of each chip is appreciated.

Thanks!

/Mayday

Seriously, this is what the "Have you searched" checkbox is for.

I'd probably start by looking at the National Semiconductor "Overature" series, especially LM3875, 3886, 4780. It's difficult not to find info on those. Google "gainclone" and you'll get about a zillion hits. Probably a good choice if it's your first go at it. There's a variety of others too from practically every chip manufacturer out there.. You could check out TexasInstruments/BurrBrown or Analog devices for a start.

-Nick

[Mayday]

Thanks.

I'll admit that I haven't googled this...sorry about that.

I'll do a bit of searching, instead of taking the easy way of asking those who allready know.

/mayday

[Arx]

No worries. We're all lazy sometimes.

BTW, If you're relatively new to electronics, a kit based on the 3875 is probably one of the easiest places to start. They're totally dead simple to wire up, and won't break the bank.

I built my first chipamp that way. I really didn't need to, since the design is VERY simple, and I'm pretty decent with a soldering iron. I could have wired it point to point without any difficulty, but I figured with the PC boards I could throw it together in a few minutes without thinking.

You'll end up spending more time building the chassis than the amp itself, unless you just screw it to a board with some cut up rca cables

Also a warning: Don't get too hung up on buying "premium" parts. If you've got the $ to blow, and want to experiment, go for it, but it's not like the basic one's significantly worse. I doubt I could tell the difference. The only likely exception being the volume control (assuming you're not using a preamp) You probably still wouldn't hear a difference there under normal circumstances, but cheap pots often don't match the volumes well side to side when you're listening quietly, and they tend to get really scratchy over time.

I bought one from "Precision Electrical Components" (available from digikey) also referred to as a PEC pot on the forums. I felt like I was being a little frivolous at the time spending $25 on a volume knob, but I'm happy I did. Seems well built like it'll last, and tracks very evenly.

-Nick

[Mayday]

I've got some PCB's coming in:

Chipamp: dual-mono
Tech-diy: bridged LM4780

And I've requested a local PCB-maker for the prise for 2 more LM3886-PCB's

I'm qurious(spelling?) to try a few different types.

Also thinking of trying some digital chipamps if there are anyone selling PCB's, kits or if I can find gerberfiles.

[Arx]

Originally posted by Mayday

Also thinking of trying some digital chipamps if there are anyone selling PCB's, kits or if I can find gerberfiles. [/B]

That, I'd be very interrested to hear about. Digital input, digital Class D output, all on a single chip. Essentially a dac with speaker level output

Let me know if you run into anything. It would be cool to run something like that off the outputs of a digital filter based crossover. I bet you would still need an inductor to eat the noise though

-Nick

[Mayday]

I don't even know if there's an "all-in-one" chip out there, digital that is.

/Mayday

[Arx]

Probably not, but if you see one, I'd like to hear about it

[mrwhy]

Does anyone know a UK supplier of TDA 7093

[Nordic]

You can normally find distributor lists on the manufacturers' sites...