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I would suggest using the op amp the DAC manufacture suggests or uses in their datasheef design. NwAvGuy March 24, at 7: NwAvGuy October 3, at 9: Anyone who argues the specs don’t matter is welcome to step up and take the challenge with their own ears, their own headphones, and their own music.

But, somehow against all those supposed audiophile gurus, the speed is rock steady and the feedback works perfectly. Thanks b0ck3n, I lk4580 make Wednesday even in my time zone this time.

Most manufactures provide a graph as well. But this game is all about bragging rights.

NJM Datasheet pdf – Dual Operational Amplifier – New Japan Radio

I am especially interested to hear your findings in blind tests if you have done any of course. Ideally look for a THD graph at 2K or less with some gain.

Low Noise — Op amp noise is modeled two ways–current noise and voltage noise. Some of the differences heard could be high frequency instability. SPICE model from the ground-up for simulation is esoteric and often time consuming.

The grain of truth behind the common audiophile desire for massive overkill power supplies is they can make a difference but only when the audio circuit has insufficient PSRR. Anonymous August 20, at 4: You could use either one.


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Low THD — This is also often poorly specified. My measurements show the two to be very similar with the NJM version even needing less quiescent current. These capacitors cause a zero and a higher frequency pole in the feedback loop response effectively cancelling one of the amp’s own non-dominant high frequency poles by placing a zero near it and replacing it with a datasheet one at a higher frequency.

The point of the article was to show how similar many op amps are, when properly used, and how other aspects of the complete design can mask differences in this case the output stage of the O2. It may take several seconds. NwAvGuy February 2, at 4: Kanwar August 19, at 5: I’m curious though, is this possibly why ‘companies’ like RSA file away the OpAmp markings on their products.

Datasheet archive on 20-11-2006

Somewhere lm45800 the range of 2. This is just the gain stage. Datssheet a signal would never make it through the recording chain, and if it did, would fry tweeters and cause bats to fly into the side of your darasheet. Of course even if you measured everything else under the sun they’d still tell you either that something else mystical and unmeasurable was causing the differences they can only hear sighted or that the high-speed opamp they put in a circuit that makes it unstable is more actually “musical”.

Sorry to hear some are suffering with surface mount parts. This, combined with the inherent matching of transistors made on a single die, and near perfect thermal tracking, provides a bag of tricks no discrete designer can match.

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Most of this article is written from the perspective of using op amps for headphone and line level audio applications.

  EN 20594-1 PDF

Soundshui Datashdet 20, at In a Cmoy, or dataasheet application, where the op amp is driving headphones directly nearly all of them are working under stressful conditions. But according to your text the OPA should annihilate other OpAmps in a well implemented circuit, then?

Some op amps need as much as 9 ma per amp section or more. To compare GBW between different op amps it needs to be specified at the same gain—i. A dual op amp also has the advantage of providing better matching between the channels.

A lot of people using op amps to drive headphones are operating them well outside their design criteria. The rest of the time its just unavoidable sighted listening bias–take away the knowledge of which is which and the “differences” disappear. Mouser doesn’t sell National Semi op amps. So it really doesn’t matter much. If catasheet op amp is driving a challenging load playing music the instantaneous temperature of the tiny silicon die is constantly changing.

Vout a9 xfmr spice llc converter spice model Text: Thanks for the great articles! So for cost savings, and to save board space, the choice is obvious—use a dual op amp.

Have you considered testing several of the same op amp to see production irregularities? Previous 1 2 Stick to the tires made for sports cars.

NwAvGuy August 21, at 5: When datashee differences are heard between op amps it’s because one or more of the op amps are being used incorrectly. The turntable has rather massive delays with respect to current inputs to the motor vs speed due to the mass of the platter.