NJR NJM072BD as a substitute for TL072 ?

They're fine.

Graham

If you're going to use them for "typical" TL072 stuff (jellybean audio, not real-low-noise, DC stuff where the offset doesn't matter much, etc.) then they're just fine. IIRC they are the cheapest TL072-alike from Mouser.

If you're so price sensitive that you're buying the cheapest ones you can find then I'm assuming you don't need platinum-iridium-standard level instrumentation or audio op-amps.

Tim.

The NJM072 *is* an audio op-amp !

Can't figure why the OP wants B grade though. C is fine for most ppl.

Graham

Well, it was a pretty good one 25 years ago. And it's just as good today, just that there are other parts that I'd use instead (not just specsmanship but also supply rails and ESPECIALLY output current capability if driving any kind of line) if I were building a one-off.

NJM072BD is Mouser's cheapest TL072-alike. You can buy other manufacturer's C-grade but they'll cost more.

I honestly don't know if NJM's "B" means cross-compatible with other manufacturer's "B-grade".

The NJR spec sheet is a little odd claiming that their 072B is drop-in compatible with everybody else's 072's, while their 072-non-B is optimized for AC application but unstable to oscillation as a voltage follower (e.g. fundamentally NOT like everybody else's 072 when it comes to internal compensation.) My interpretation is that their

Tim.

Uh-oh... This question is a tell-tale sign that you're not familiar with those parts... Despite its name, the NJM072 is not equivalent to the TL072[C]. Its slew rate is 20 V/=B5s. It's not unity-gain stable.

The NJM072B is roughly equivalent to the TL072[C] with a slew rate of 13 V/=B5s.

NJR do not offer any TL072A or TL072B equivalents that I know of.

To answer Tim's question : my interest in the NJR parts is not motivated by price. TI's TL072CP are cheaper. The reason is that the NJM072* are the only non-RoHS TL072 still available from Mouser.

Those parts are going to be used in various synth modules. The synth-DIY community seem to have standardised on the TL072 as a generic op-amp. If they need precision, they'll use an LT1013. If they need low bias current, they'll use an LF412 and so on. They use the TL072/74 for most of the rest. Non-critical CV, unity-gain audio...

I just want to make sure the NJR part is not egregiously bad. For instance, if the crosstalk really is 25 dB worse than a TL072, some circuits designed for the TL072 might start misbehaving.=20

Thanks for your comments.

Ah, if you want a ROHS flamefest you would've included "ROHS" in your subject line, but you didn't, so you don't want one :-).

So far I've not noticed anything obvious about ROHS hand-solderability on DIPs etc. I doubt that a regular 8-pin DIP is going to be the first part to suffer from tin whiskers etc.

I use them in non-critical stuff and have not seen obviously bad crosstalk, but then again I'm a non-critical kind of guy :-).

Tim.