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Due to the holidays, responses may be delayed. I’ve seen wired things with this though, but satasheet 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 the time the worst case offset in most applications, at least than this, this implies a huge unlinearity and baaad CMRR!

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There are other things that usually are associated with it which is good to appear on the data sheet, for example input beyond the rails or rail to rail output, or one rail inside or close to the output range which are l3m87n to know, but single lm3877n, dual supply?

The main concern is that the circuit itself should need no changing with the replacement. No license, either express or implied, by estoppel or otherwise, is granted by TI. Mentions Tags More Cancel.

LM387N PDF Datasheet浏览和下载

THD at 60dB gain 0. I haven’t seen many designs using it? Most of the typical applications shown on the datasheet can be duplicated with “normal” op-amps, but DC biasing will need to be added.


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This reduces bias resistor noise contribution, allows easy single supply operation with fewer components, and provides excellent PSRR. However, there must be a DC path between the output and the negative input to maintain DC feedback.

The newly created question will be automatically linked to this question. Ask a related question What is a related question? Ask a related question Ask a new question.

JohnRoberts on September 06, This is an audio circuit. 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 datashee DC biased internally. This thread has been locked. But two 10K resistors and a 47u cap do the same. The LMN has been obsoleted. You may have to modify your existing circuit a bit by adding a blocking cap or a few datasheef resistors to use a “normal” op-amp.

LM is a penny easier because it has a bias voltage built-in, so you can set the output around half-supply. Trademarks Privacy Policy Terms dagasheet Use. Then, always, in “low distortion” audio applications “” because we are not trying to archive 0.

LM387N Datasheet

Nov 24, 8: Use of the information on this site may require a license from a third party, or a license from TI. Flu got me pretty seriously! Nov 27, All content and materials on this site are provided “as is”. Is it noisy, frequency impaired or something like that? I want to do a balancing circuit for the direct outs. daasheet

Thanks for your wise replies! All postings and use of the content on this site are subject to the Terms of Use of the site; third parties using this content agree to abide by any limitations or guidelines and to comply with the Terms of Use of this site. 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 Agree that ‘ should be your go-to in this case.



I’m an enthusiast without proper background education in electronics datasehet I’m chewing this slowly. We are glad that we were able to resolve this issue, and will now proceed to close this thread. It also has sad output power. Something similar to what Audiox did with NE If you have further questions related to this thread, you may click “Ask a related datahseet below. Any suggestions would be appreciated.

Do you have another question? The LM has a different pin-out not normally used with dual op-amps – so any board layouts would have to change. 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 datashet ground, so it knows if it has a dual or single rails.

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LMN datasheet & applicatoin notes – Datasheet Archive

If I don’t know how it works, I prefer don’t turn it on. It was an OK part for back then, but I am surprised they still sell them. Sorry for not replying back after I started this thread.

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