National Semiconductor LM and. LM, Respectively description. These devices consist of four independent, high- gain frequency-compensated Norton. LM description These devices consist of four independent, high gain frequency-compensated Norton operational amplifiers that were designed. LM MC Unit. Supply Voltage. VCC. + + V. Input Current. Iin. mA on the individual data sheets and the Selector Guide. All of the.

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For a better experience, please enable JavaScript in your browser before proceeding. The non-inverting inputs should connect to half the supply voltage filtered with a capacitor to ground.

Hi, The LM was a very different ln3900 of op amp. I probably have few AD’s around, but i dont think i have any LM’s around anymore. Datasheets, Manuals or Parts. Replacement Transformer Started by ncag 59 minutes ago Replies: Neil Groves New Member Nov 8, Redesigning them for other op amps probably wouldnt be much of a problem really.

Maybe this was lm39000 very old design. Roff Well-Known Member Nov 8, By continuing to use this site, you are consenting to our use of cookies.

National Semiconductor – datasheet pdf

The LM is a high speed version. You must log in or register to reply here.


Hi, I’d be careful about using an AD for a replacement. It’s very different than the LM Km3900 am surprised to see them in circuits today. Is an LM a good replacement for an LM? One of the cool things about the LM is that the input voltage can exceed the supply rails without a lot of fancy stuff.

LM3900 Datasheet PDF

Datasheer here to register now. We can call the input resistor R1 and the resistor to ground R2 and the feedback resistor R3.

It can not be replaced with a LM op amp. For one thing, the input bias would be different.

I seem to have blown out on at least two things here, i’m gonna scrap that project, build something else i need then come back to it using a different circuit. Replacing a daatasheet pin leaded inductor with a 2 pin Started by gkmaia Yesterday at From the LM data sheet it looks like the three amps with two caps each are just bandpass filters.

To participate you need to register. That’s what a specific timer of mine does. Thus you could look for the presence of line to speaker levels very easily and even filter the hiss. This may not be the ideal setup, but it might dagasheet work.


LM3900 substitute?

Media New media New comments Search media. Forums New posts Search forums. It would be possible however datawheet change the design a little to use a more typical op amp.

Hi again, Yeah i remember these from back in the ‘s. Back in the 80’s i did.

The circuit uses a single polarity supply so grounding the non-inverting input of the opamps would cause their outputs to be grounded and they would work like rectifiers. Datzsheet starter Neil Groves Start date Nov 7, I couldn’t locate one of the latter so relayed my circuit to use an LM instead, well it doesn’t work, i checked my output from the first stage and it sits at 10V although the input is a 4V p-p sine wave from my generator, i am building the circuit here: Neil Groves New Member Nov 7, This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.