Where can I get good SMT metal film resistors?

[Porksoda]

I looked around digikey, mouser, and newark, but it seems metal film and surface mount are mutually exclusive in their catalogs. Anybody know where to get SMT metal film resistors, or know of alternatives to metal film in an SMT package?

Thanks

 

[jnewman]

Any of the KOA Speer or Vishay Thick or Thin Film resistors from Mouser should be fine. Check pages 384 through 386 for KOA Speer and 387 and 389 for Vishay (thick film are 1%, thin film are .1%). They're all either metal films or close equivalents.

Jimmy.

 

[Wodgy]

For "audiophile" applications, most people use thin film. From what I've heard, they have measurably less distortion than thick film types.

 

[jnewman]

Quote:

Originally Posted by Wodgy For "audiophile" applications, most people use thin film. From what I've heard, they have measurably less distortion than thick film types.

It seems like a lot of the time they're close enough it doesn't matter - I haven't actually looked at the chip resistors, but with leaded resistors, Vishay 1% thin films have typical .1 microvolt/volt noise while the IRC .1% thick films I'm using in an amp I'm building now have a typical .01 microvolt/volt noise. It looks like all the specs are within a close order of magnitude small enough that it doesn't matter, and also that the differences are more dependent on whether they're 1% resistors or .1% resistors. All that being said, I could be wrong and I was just looking at two kinds of resistors, the leaded ones from mouser.

Jimmy