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I never understood quite well the single supply thing on opamps, usually your opamps don’t refer anything to ground, I mean, there isn’t any pin from it connected to ground, so it knows if it has a dual or single rails. Flu got me pretty seriously! The main concern is that the circuit itself should need no changing with the replacement. Most of the typical applications shown on the datasheet can be duplicated with “normal” op-amps, but DC biasing will need to be added.

Hi, I started planning a mod on my old console and I wanted to find an IC opamp that can run on a single supply voltage Let’s look the data sheet, if it looks right there it’s time to breadboard. Due to the holidays, responses may be delayed. I would suggest using something more modern, this part was designed to operate at high gain not stable below 10x with small input voltages, and nominal input voltage DC biased internally.

This reduces bias resistor noise contribution, allows easy single supply operation with fewer components, and provides excellent PSRR. Everything you listen to has been through multiple ‘s. I haven’t seen many designs using it? Any suggestions would be appreciated. It is made to drive one 10K volume control in the same box, not long wires, multiple loads, etc. Nov 24, 8: This is an audio circuit. TI, its suppliers and providers of content reserve the right to make corrections, deletions, modifications, enhancements, improvements and other changes to the content and materials, its products, programs and services at any time or to move or discontinue any content, products, programs, or services without notice.


However, there must be a DC path between the output and the negative input to maintain DC feedback.

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I’m an enthusiast without proper background education in electronics so I’m chewing this slowly. Nov 27, You may have to modify your existing circuit a bit by adding a blocking cap or a few bias resistors to use a “normal” op-amp. I’ve seen wired things with this though, but nobody says so in the data sheet, for example, lower offset working input voltage close to lower rail than at the mid point, but that’s not a good thing, I would prefer having all datashert time the worst case offset in most applications, at least than this, this implies a huge unlinearity and baaad CMRR!

Sorry for not replying back after I started this thread. JohnRoberts on September 06, If you have a related question, please click the ” Ask a related question ” button in the top right corner. Menu Search through millions of questions and answers User.

The LM has a different pin-out not normally used with dual op-amps – so any pm387n layouts would have to change.


LM387N Datasheet

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Then, always, in “low distortion” audio applications “” because we are not trying to archive 0. Ask a related question What is lm3887n related question? Content on this site may contain or be subject to specific guidelines or limitations on use.

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But two 10K resistors and a 47u cap do the same. Mentions Tags More Cancel.

If I don’t know how it works, I prefer don’t turn it on. Some unbalance at input impedance but nothing to be alarmed for your application, as input device may not be so cool.

Should I use it? The newly created question will be automatically linked to this question. Go to Support forums. Agree that ‘ lj387n be your go-to in this case.