DATASHEET LM3900 PDF

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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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Redesigning them for other op amps probably wouldnt be much of a problem really. Jameco has the LM’s: It can not be replaced with a LM op amp.

That’s what a specific timer of mine does. Hi again, Yeah i remember datwsheet from back in the ‘s. 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. The LM is not a normal OP amp.

LM3900 substitute?

datasheer 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.

From what i read, the NTE is a replacement. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.

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I probably have few AD’s around, but i dont think i have any LM’s around anymore. By continuing to use this site, you are consenting to our use of cookies. One of the cool things about the LM is that the input voltage can exceed the supply rails without a lot of fancy stuff.

Roff Well-Known Member Nov 8, For a better experience, please enable JavaScript in your browser before proceeding. You must log in or register to reply here. Articles Top Articles Search resources. 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. It’s very different than the LM This may not be the ideal setup, but it might still work.

Neil Groves New Member Nov 7, Maybe this was a very old design. Media New media New comments Search media. Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets.

From the LM data sheet it looks like the three amps with two caps each are just bandpass filters. 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. Replacement Transformer Started by ncag 59 minutes ago Replies: Click here to register now.

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Hi, The LM datzsheet a very different kind of op amp. Thread starter Neil Groves Start date Nov 7, Potentiometer Questions Started by norbss Yesterday at Replacing a 4 pin leaded inductor with a eatasheet pin Started by gkmaia Yesterday at To participate you need to register. The non-inverting inputs should connect to half the supply voltage filtered with a capacitor to ground. I am surprised to see them in circuits today. Forums New posts Search forums.

It operates on the difference in input current rather than the dafasheet in input voltages.

For one thing, the input bias would be different. Is an LM a good replacement for an LM? The feedback resistor R3 is then: Hi, I’d be careful about using an AD for a replacement. Neil Groves New Member Nov 8, Welcome to our site! 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: We can call the input resistor R1 and the resistor to ground R2 and the feedback resistor R3.

Datasheets, Manuals or Parts.