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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Neil Groves Datasheeg Member Nov 7, Forums New posts Search forums. Click here to register now. 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 8, Maybe this was a very old design.

Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. Hi again, Yeah i remember these from back in dataeheet ‘s.

National Semiconductor – datasheet pdf

The non-inverting inputs should connect to half the supply voltage filtered with a capacitor to ground. For a better experience, please enable JavaScript in your browser before proceeding. It can not be replaced with a LM op amp.


Datasheets, Manuals or Parts. From what i read, the NTE is a replacement. Redesigning them for other op amps probably wouldnt be much of a l3m900 really.

LM3900 Datasheet PDF

Welcome to our site! Jameco has ,m3900 LM’s: Hi, I’d be careful about using an AD for a replacement. Articles Top Articles Search resources.

I probably have few AD’s around, but i dont think i have any LM’s around anymore. Thus you could look for the presence of line to speaker levels very easily and even filter the hiss.

We can call the input resistor R1 and the resistor to ground R2 and the feedback resistor R3. Roff Well-Known Member Nov 8, This may not be the ideal setup, but it might still work. 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. It’s very different than the LM Is an LM a good replacement for an LM? The LM is not a normal OP amp.

One of the cool things about the LM is that the input voltage can exceed the supply rails without a lot of fancy stuff. Media New media New comments Search media. The LM is a high speed version. Back in the 80’s i did. It would be possible however to change the design a little to use a more typical op amp.


I am surprised to see them in circuits today. To participate you need to register. Thread starter Neil Groves Start date Nov 7, For one thing, the input bias would be different.

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LM Quad Op Amp IC | NightFire Electronics LLC

Datasueet must log in or register to reply here. 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.

Replacement Transformer Started by ncag 38 minutes ago Replies: That’s what a specific timer of mine does.