Equivalent for NE5534

[Davor]

Yes and no. The inverting input observes the equivalent resistance. That's why you can't find a very low noise with low gain - lower input resistance comes with higher gain. With over 4nV/sqrt(Hz) at 5534, 11k is OK.

[ODM]

Doesn't the feedback resistor noise get added into the business as well? Most frontends have rather large feedback resistors to pump up the gain, which spoils the amplifier's inherent low noise. Correct me if I'm wrong, but 5534's popularity as a PI frontend partially lies in its relatively rapid recovery for an old "standard" design?

--edit--
never mind, I seem to be tripping the bollocks, transimpedance coupled amp noise improves as the sqrt of feedback resistance!

[mickstv]

I have the AD8510 amplifier. Can he use in the metal detector instead NE5534?

I wouldn't bother trying because it has a higher nV/√Hz than the NE5534

[stone61]

I have the AD8510 amplifier. Can he use in the metal detector instead NE5534?

[6666]

Maybe the 833 would be worth a try as a split low gain preamp for PI rather than a 5532.

[Davor]

Gee. I missed the point.

[6666]

The 833 is a dual op amp

[Davor]

LM833 is considered the same thing, yet some say it is even better. Power consumption is not superb though.
Some also say NE5532 becomes even better if a few kohm resistor is connected between a negative rail and it's output, as it forces the output operation in class A. Makes sense.

[nando.22]

The ci 356 Lf can be used in place of NE5534

[Qiaozhi]

posso usar algum CI da serie TL07 para substituir o NE5534

tl081 pode ser usado em
lugar do ne5534

só tenho o lf356 pode
ser usado

Please read the forum rules and make your posts in English ->

http://www.geotech1.com/forums/showthread.php?10526-Basic-Rules-of-the-Forums

[nando.22]

só tenho o lf356 pode
ser usado

[Orbit]

that replacement ad797 ? and replace ad 8054

[nando.22]

tl081 pode ser usado em
lugar do ne5534

[bernte_one]

lt 1115 like the modding tips for baracuda less noise

[nando.22]

posso usar algum CI da serie TL07 para substituir o NE5534