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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LM3900 substitute?

Thread starter Neil Groves Start date Nov 7, We can call the input resistor R1 and the resistor to ground R2 and the feedback resistor R3. It operates on the difference in input current rather than the difference in input voltages. You must log in or register to reply here.

Is an LM a good replacement for an LM? Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. Media New media New comments Search media. This may not be the ideal setup, but it might still work. The LM is a high speed version. Articles Top Articles Search resources. That’s what a specific datashert of mine does. Redesigning them for other op amps probably wouldnt be much of a problem really. Neil Groves New Member Nov 8, Jameco has the LM’s: 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.


LM Datasheet(PDF) – Motorola, Inc

Thus you could look for the presence of line to speaker levels very easily and even filter the hiss. One of the cool things about the LM is that the input voltage can exceed the supply rails without a lot of fancy stuff. Neil Groves New Member Nov 7, 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. To participate you need to register.

I probably have few AD’s around, but i dont think i have any LM’s around anymore. From dxtasheet i read, the NTE is a replacement.

By continuing to use this site, you are datashedt to our use of cookies. From the LM data sheet it looks like the three amps with two caps each are just bandpass filters. Roff Well-Known Member Nov 8, Hi, The LM was a very different kind of op amp.

LM3900 Datasheet PDF

Datasheets, Manuals or Parts. I am surprised to see them in circuits today. Welcome to our site! For one thing, the input bias would be different.


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This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Forums New posts Search forums. I couldn’t locate one of the latter so relayed my circuit to use an LM instead, well it doesn’t work, i checked lm33900 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: The LM is not a normal OP amp.

Hi, I’d be careful about using an AD for a replacement. Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at The non-inverting inputs should connect to half the supply voltage filtered with a capacitor to ground.

The Q of each bandpass would be a little higher though so you’d have to try it and modify the values slightly if it doesnt seem to work the way you want it to.

Hi again, Yeah i remember these from back in the ‘s.