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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Roff Well-Known Member Nov 8, It would be possible however to change the design a little to use a more typical op amp. Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at Is an LM a good replacement for an Daatasheet To participate you need to register.
It’s very different than the LM Datasheets, Manuals or Parts. This may not be the ideal setup, but it might still work. You must log in or register to reply here.
Hi again, Yeah i remember these from back in the ‘s. We can call the input resistor R1 and the resistor to ground R2 and the feedback resistor R3. Back in the 80’s i did. I probably have few AD’s around, but i dont think i have any LM’s around datasheeg.
I am surprised to see them in circuits today. The feedback resistor R3 is then: Articles Top Articles Search resources. For one thing, the input bias would be different. Jameco has the LM’s: 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.
From what i read, the NTE is a replacement.
Forums New posts Search forums. 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. Thus you could look for the presence of line to speaker levels very easily and even filter the hiss.
Media New media New comments Search media. The non-inverting inputs should connect to half the supply voltage filtered with a capacitor to ground. Redesigning them for other op amps probably wouldnt be much of a problem really.
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The LM is l3900 high speed version. Maybe this was a very old design. Hi, I’d be careful about using an AD for a replacement. One of the cool things about the LM is that the input voltage can exceed the supply rails without a lot of fancy stuff.