Time line of Dual 8pin Op Amp development - diyAudio
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Old 16th April 2012, 09:06 AM   #1
clm811 is offline clm811  United States
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Question Time line of Dual 8pin Op Amp development

Interested in a Time Line of pin-compatible Dual 8pin Op Amp development
(i.e. approximate date of release for each)?

TL072, LM833, NE5532,LT1028,LF442,AD812,NJM4560,OPA2604,
AD826,LM6172,OPA2132,LME49720, etc.

Are all truly pin-compatible and can they be substituted
for one another in audio circuit such as preamp,
active crossover, etc?

THX.
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Old 16th April 2012, 03:06 PM   #2
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Pin-compatibility is only one small item in a long list of engineering questions that must be answered to determine if op-amps can be successfully substituted!
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Old 16th April 2012, 04:15 PM   #3
clm811 is offline clm811  United States
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Default Please help list these in chronological order of release

TL072, LM833, NE5532,LT1028,LF442,AD812,NJM4560,OPA2604,
AD826,LM6172,OPA2132,LME49720,


Thank you.

Next, please?
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Old 16th April 2012, 04:26 PM   #4
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An excerpt from Doug Self's book:

Op amps in small-signal audio design - Part 1: Op amp history, properties
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Old 16th April 2012, 04:46 PM   #5
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There is some history in the Op Amp Applications Handbook available at the Analog Devices Web Site.


The parts have different parameters optimised such as cost, bandwidth, noise, offset, current consumption etc.


My contribution to the Time Line is:-


TL072 is an early JFET input amplifier, I have a Texas Instruments Data Sheet dated September 1978.
NE5532, Signetics, Data book dated September 1977.
LF442, National Semiconductor, Data book dated 1982.
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Old 16th April 2012, 10:38 PM   #6
clm811 is offline clm811  United States
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Thanks for the resources.

So far we have:

TL072, 1978.
NE5532, 1977.
LF442, 1982

Anyone else?
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Old 17th April 2012, 01:04 AM   #7
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I wouldn't ask for information until after I read the Analog Devices "Op Amp Applications Handbook".

I seem to recall the uA747 being released about 1969 or 1970. Motorola's original MC1458/MC1558 were not long after. I think you're as much as 5 years late on your date for the TLO72 (1978); I'd guess 1974 or '75. The early JFET opamps (LF353 et al) from National were a year or two earlier.

Those are my recollections; now your job is to do the scholarship that supports or disproves them. It may not be easy, since the original manufacturers are gone.

Dale
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Old 17th April 2012, 07:43 AM   #8
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Default 1974 or '75

Quote:
I wouldn't ask for information until after I read the Analog Devices "Op Amp Applications Handbook"
Thanks- is it posted somewhere here on the DiyAuidio website (I did a search-n/a)?

I thought this website was a place to ask questions, (rather than solicit "read/buy a book" recommendations).

So far we have:
TL072, 1975/6.
NE5532, 1977.
LF442, 1982


As far as compatibility, for instance, I have two electronic crossovers, one using TL072's, and the other has LF442's in active, audioband filters. Which of the following modern dual opamps would be a "plug-in" replacement for each of them; OPA2604,AD8620,LM6172,OPA2132 or LME49720?

TIA
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Old 17th April 2012, 09:04 AM   #9
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Hello,
Your question is difficult to answer. Hence the suggestion of looking at the Analog Devices Web Site that has a description of operational amplifier history at http://www.analog.com/library/analog..._ChH_final.pdf
It mentions dual operational amplifier pin out, JFET input operational amplifiers and other stuff.

Kevin stated 'Pin-compatibility is only one small item in a long list of engineering questions that must be answered to determine if op-amps can be successfully substituted!'

There is no sure fire "plug-in" replacement for anything though often it will be OK. For instance the LF442 is a low power part. If you substitute a higher bandwidth lower noise part with a higher current consumption the power supply may not be adequate. The bipolar input operational amplifiers generally have lower voltage noise but have significant input bias currents that may or may not give problems if you are substituting TL072 of LF442 JFET input operational amplifiers.

Why do you want a time line? The parts have different parameters optimised at the time of manufacture and knowledge available when they were designed. You are also listing parts from different manufacturers where commercial issues, process capability and availability all affect the history.
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Old 17th April 2012, 09:09 AM   #10
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And many parts (maybe even all) are designed with the requirements of the market at the time. For instance, developement of all those very wide band, very low distortion parts of the last few years is largely driven by the need for millions of (A)DSL modems, drivers and receivers.

jan didden
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