Low voltage noise dual OP

[Holger Barske]

I am looking for a good dual OP with low voltage noise on low source impedances, so preferably with BJT inputs.
Yes, I am of course familiar with NE5532, but I am looking for something superior.

Any suggestions?

[peranders]

What are your application and how low noise do want to get?

Are AD8620, OPA2134 too noisy?

[Werner]

OPA2227 and 2228. 3nV/sqrt(Hz).

Also available in quad.

http://focus.ti.com/lit/ds/symlink/opa227.pdf

[Holger Barske]

Great, that's the stuff I've been looking for. Thank you Werner!

[dioklecijan]

JRC2114 4nV/sqrt(Hz)

Marantz and Accuphase use this.

[peranders]

Originally posted by Werner
OPA2227 and 2228. 3nV/sqrt(Hz).

Also available in quad.

http://focus.ti.com/lit/ds/symlink/opa227.pdf

If low noise is of major concern those opamps are definitely worth a try.

[chrish]

Not sure if it will suit your requirements, but Brown Dog make a converter that will allow you to mount two single SMD or DIP op amps to make a dual op amp DIP package. I am using these to construct an active crossover using OPA627 single op amps (the pcb I have uses dual op amp DIP).

Chris

[amb]

Not a dual op amp, but the Analog Devices AD797 has 0.9nV/sqrt(Hz). This is one of the quietest op amps for audio you'd find. If you must use a dual, you can put two AD797s on a Browndog adapter model 021001. Digi-Key and Newark carry Analog Devices chips.