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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One of the cool things about the LM is that the input voltage can exceed the supply rails without a lot of fancy stuff. This site uses cookies to help personalise content, tailor your dattasheet and to keep you logged in if you register.

Forums New posts Search forums. Datasheets, Manuals or Parts. Datasueet 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. This may not be the ideal setup, but it might still work.

That’s what a specific timer of mine does.

Jameco has the LM’s: Hi, I’d be careful about using an AD for a replacement. Redesigning them for other op amps probably wouldnt be much of a problem really.


LM3900 Datasheet PDF

From the LM data sheet it looks like the three amps with two caps each are just bandpass filters. Welcome to our site!

For one thing, the input bias would be different. Hi again, Yeah i remember these from back in the ‘s. Datashdet here to register now.

Media New media New comments Search media. Replacement Transformer Started by ncag 59 minutes ago Replies: It would be possible however to change the design a little to use a more typical op amp.

Potentiometer Questions Started by norbss Yesterday dwtasheet Thus you could look for the presence of line dataxheet speaker levels very easily and even filter the hiss. Thread starter Neil Groves Start date Nov 7, The LM is not a normal OP amp.

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: The non-inverting inputs should connect to half the supply voltage filtered with a capacitor to ground.

To participate you need to register. Neil Groves New Member Nov 7, Articles Top Articles Search resources. Replacing a 4 pin leaded inductor with a 2 pin Daatasheet by gkmaia Yesterday at Is an LM a good replacement for an LM? Back in the 80’s i did. It’s very different than the LM Maybe this was a very old design.

For a better experience, please enable JavaScript in your browser before proceeding. I am surprised to see them in circuits today. From what i read, the NTE is a replacement. 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. We can call the input resistor R1 and the resistor to ground R2 and the feedback resistor R3.


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It can not be replaced with a LM op amp. You must log in or register to reply here. The LM is a high speed version. Roff Well-Known Member Nov 8, Hi, The LM was a very different kind of op amp. I probably have few AD’s around, but i dont think i have any LM’s around anymore. The feedback resistor R3 is then: It operates on the difference in input current rather than the difference in input voltages.

By continuing to use this site, you are consenting to our use of cookies. The Q of each bandpass would be a little higher though so dztasheet have to try it and modify the values slightly if it doesnt seem to work the way you want it to.

Neil Groves New Member Nov 8,