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Open loop gain measurements of NE5534 / NE5532 / LM318 from various manufacturers
Open loop gain measurements of NE5534 / NE5532 / LM318 from various manufacturers
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Old 7th May 2019, 11:06 PM   #1
Nazar_lv is offline Nazar_lv  Europe
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Default Open loop gain and CMRR meas. of NE5534 / NE5532 / LM318 from various manufacturers

NE5534N Philips
SE5534AN ONsemiconductor
NE5534P TI
NE5534AP TI (old, 80s)
NJM5534D JRC
NE5532P TI
NJM5532D JRC
LM318N National Semiconductor
LM318D TI
LT318A

Open loop gain measurements of NE5534 / NE5532 / LM318 from various manufacturers
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Last edited by Nazar_lv; 10th May 2019 at 02:10 PM.
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Old 8th May 2019, 08:00 AM   #2
tubestrek is offline tubestrek  Austria
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Interesting. All 5534 samples are within the tolerances. One thing, if you compare samples from different manufacturers, then you should first do tests from one manufacturer. Because the chances are hight, that the tolerances are the same as comparing different manufacturers.

The tolerances for the 318 are somehow higher.
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Old 8th May 2019, 09:43 AM   #3
Nazar_lv is offline Nazar_lv  Europe
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Quote:
Originally Posted by tubestrek View Post
One thing, if you compare samples from different manufacturers, then you should first do tests from one manufacturer.
of course, the are no significant difference

Quote:
Originally Posted by tubestrek View Post
Interesting. All 5534 samples are within the tolerances.
no, the are no unity gain bandwith(unity gain frequency) in the datasheet and associated tolerances, the same with AC gain tolerances (only in 1034 but with correction capacitor 22pF and load capacitor 100pF but without tolerances).

5534(and many others opamps) from different manufacturers are in fact different opamps, philips has ugb=31.8MHz and phase margin 47deg, onsemi has ugb=14.6MHz and phase margin 70deg, and can be used with closed loop gain as low as +1.
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Old 8th May 2019, 12:25 PM   #4
jan.didden is offline jan.didden  Europe
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This is very nice information, thanks for that.
It is nice to see the gain for the compensated 5532 being about 6dB less than the de-compensated 5534 types.
Am I right that the top Y-axis is 60dB, with 10dB/div? Not used to see graphs with no axis labeling.

A question: is the info also available for lower (audio) frequencies? It would be nice to see the ol bandwidth.

Jan

Last edited by jan.didden; 8th May 2019 at 12:27 PM.
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Old 8th May 2019, 01:25 PM   #5
Nazar_lv is offline Nazar_lv  Europe
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Quote:
Originally Posted by jan.didden View Post
Am I right that the top Y-axis is 60dB, with 10dB/div?
Yes

Quote:
Originally Posted by jan.didden View Post
Not used to see graphs with no axis labeling.
This is plot from slightly modified HP 3577A

Quote:
Originally Posted by jan.didden View Post
A question: is the info also available for lower (audio) frequencies? It would be nice to see the ol bandwidth.
I did not save that "screenshots", it is absolutely predictable.
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Old 10th May 2019, 02:09 PM   #6
Nazar_lv is offline Nazar_lv  Europe
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Also find CMRR measurements data
S-Audio.Systems // CMRR measurements of NE5534 / NE5532 / LM318 from various manufacturers
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Old 10th May 2019, 02:42 PM   #7
dreamth is offline dreamth  Romania
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Quote:
Originally Posted by tubestrek View Post
Interesting. All 5534 samples are within the tolerances. One thing, if you compare samples from different manufacturers, then you should first do tests from one manufacturer. Because the chances are hight, that the tolerances are the same as comparing different manufacturers.
This would only outline once more that the manufacturers do have high standards.
Randomly choosing only one sample from each manufacturer, if all the manufacturers show similar measurements give an automatic feedback on all the manufacturers standards .
It's highly improbable to be just luck that one manufacturer's sample was the only good one in all their samples if it was randomly chosen.
If you do 10 samples from one manufacturer you need to check ten samples from each manufacturer and the result will be simply similar unless the probability rules don't work anymore with great numbers.


You have only one exception to the rule that might be applied here:
The older designs of ne5534/32 like Philips or Signetics were already checked for noise specs and batched accordingly before being sold, but at the same time the technology made possible for larger numbers with similar specs to be manufactured in the same amount of time so 1000 hand picked op-amps from the past might have the same tolerances as 100 000 randomly chosen op-amps of today .

Last edited by dreamth; 10th May 2019 at 02:47 PM.
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Old 8th July 2020, 01:58 PM   #8
Brouilly is offline Brouilly  United Kingdom
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Thanks for posting this. Can you share your test set up please?
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Old 25th April 2021, 08:24 PM   #9
Nazar_lv is offline Nazar_lv  Europe
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Quote:
Originally Posted by Brouilly View Post
Thanks for posting this. Can you share your test set up please?
yes, ASAP.

Some new measurements: TDA1034, Signetics 5534, Signetics 5532, LM318H Raytheon, NE5532 HGSEMI. Link the same S-Audio.Systems // open loop gain measurements of NE5534 / NE5532 / LM318 from various manufacturers
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Last edited by Nazar_lv; 25th April 2021 at 08:34 PM.
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Old 25th April 2021, 10:47 PM   #10
fredbloggstwo is offline fredbloggstwo  United Kingdom
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Thanks for that information - very interesting if even being within spec.

If I remember correctly, Philips and Signetics shared the same manufacturing process etc for their 5532/4s and were often favoured above the likes of TI.

I use an MCI recording/mixing console full of 'House numbered' 5532s and 5534s which are, in fact, cherry-picked Signetics devices chosen by the manufacturer for being very tightly within spec., particularly their noise spec.

Cheers

Mike
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