OP-AMPs can you get a 5V one?

[lompa]

can you get op amps that will run of say 5v without a -ve supply needed?

thanks

 

[checkmate]

The LM321 single supply op-amp is te most famous one I believe.

 

[Russlk]

The best way to find something like that is to use Digi-Key's search engine. www.digikey.com

 

[lompa]

thanks lm321 looks perfect

 

[Dean Huster]

The LM321 sounds a little old to me. Five volt operation means that you don't have a lot of headroom to work with because the op amp will go into saturation early. Check out the newer rail-to-rail (input and output) op amps offered by Maxim, TI and others. It's a lot nicer to operate in a zero to five volt window that it is with a one to three volt window. You'll also get better linearity and lower distortion with larger signal excursions.

Dean

 

[spuffock]

try the mcp601 from microchip. 5v, rail to rail output, high input impedance. reasonable current consumption, useful bandwidth, cheap, and you can get it in a little 5 pin package that's difficult to see!