Looking for replacement for LM387

Futurelec claims to have the LM387N in stock for $1.95. See

Bob

NTE824

The problem is I am in the U.K and we do not get NTE devices.

Thanks.

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Tom

I'd say that the problem is it was one of a number of devices intended for "low noise dual preamplifier" applications, and there wasn't really second sourcing. It's not as if it's an standard pin-out op-amp with some specs spruced up for a specific application. There were various devices at the time that were about the same thing (one might argue that they all claimed to be the best device for the purpose), but they all had differences in pin-outs or specs.

So the NTE was a good solution, since it would be a direct replacement.

Beyond that, unless you can find a source of the LM387, it will require some reworking of the circuit.

Michael

I do not mind if the pin out is not the same (DIL or SIL) but it must be low noise and bandwidth for 10 MHz or better, below is the spec.

The circuit it is in has a supply voltage of 26 volts.

The main problem is the large output swing.

? Low noise: 1.0 µV total input noise ? High gain: 104 dB open loop ? Single supply operation ? Wide supply range LM387: 9 to 30V LM387A: 9 to 40V ? Power supply rejection: 110 dB ? Large output voltage swing (VCC - 2V)p-p ? Wide bandwidth 15 MHz unity gain ? Power bandwidth 75 kHz, 20 Vp-p ? Internally compensated ? Short circuit protected

Thanks

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Tom

Dial Electronics' website in England is showing the LM387N for 1.96 GBP, see

It might be worth contacting them to see if they really do have some. Contact details at

Bob

We can order Farnell parts from Newark here. Can you do the same in reverse?

greg

If pin compatibility doesn't matter how about this old workhorse - NE5534.

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*I'm pretty sure that sex is better than logic, but I can't prove it.  

    Dave Plowman        dave@davenoise.co.uk           London SW

Here is a dual. LM833 I think its gain of one stable.

Another precision single OP37, better pwr supply rejection if thats inportant.

greg

A little number shifting, a quad LM837

Memory is failing. NE 5532 is effectively a dual 5534. Still readily available - which probably says much for its design.

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*Save a tree, eat a beaver*

    Dave Plowman        dave@davenoise.co.uk           London SW

Thanks for everyone help, I have used LM833.

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Tom