LME49720 Vs LM4562.... - diyAudio
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Old 22nd August 2007, 08:19 PM   #1
Ryssen is offline Ryssen  Sweden
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Default LME49720 Vs LM4562....


The data seems identical to LM4562..is there any difference?
Regards Åke
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Old 22nd August 2007, 10:26 PM   #2
forr is offline forr  France
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Hi Ryssen,
Having had a quick look the data sheet of the LM4562 August 2006 and of the LM49860 June 2007, the differences I detected were at the end of the documents : no mention of "banned substance compliance compliance" at the end of the LME49860 datasheet.
The datasheet of the LM49720, May 2007, seems identical on all specs.
Why some many references for apparently similar products ?
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Old 23rd August 2007, 03:04 AM   #3
Leolabs is offline Leolabs  Malaysia
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Maybe different sound???
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Old 23rd August 2007, 04:03 PM   #4
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National uses an additional 'E' in the name (LMExxxxx) to indicate their new high performance audio products. Perhaps the LM4562 came out before the change so they made a new part number to indicate high end part. There is a whole family of LME parts of op. amps and drivers yet only the LM4562 and LM4702 that are not part of these families. These were the first two parts out that could be called high end.

Go figure.

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Old 23rd August 2007, 04:25 PM   #5
Ryssen is offline Ryssen  Sweden
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By a person who knows a person at National in Sweden,I got to know that it is the same chip.
By the same reason you mention(marketing strategi)they have changed the name.
So then there are 3 opams that are the same now,but with diffrent names.Lm4562,LME49720 and LME79860...
Regards Åke
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Old 23rd August 2007, 04:26 PM   #6
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What's the major difference between half of LM4562 and an LME49710?
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Old 23rd August 2007, 04:42 PM   #7
foo is offline foo  Tibet
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Obviously, LME49710 has lower distortion at higher voltage output.
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Old 14th October 2007, 07:16 PM   #8
RCruz is offline RCruz  Switzerland
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Default LM4562

Thank you All for the precious info...


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Old 7th February 2008, 11:23 AM   #9
hobbitz is offline hobbitz  Thailand
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The only difference is.
LME49720 +- 17V max
LME49860 +- 22V max
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Old 9th February 2008, 10:13 PM   #10
drdagor is offline drdagor  United States
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Digikey apparently knows that the LM4562 and the LME49720 are the same part. They don't stock both. They have the LME49710 and 40, but they have the dual listed only as the LM4562.

A distributor that calls on me at work has a theory about why it is dual numbered. As an earlier note said, National had re-numbered their audio line to LME so it needed a place in that listing. But after the LM4562 won all sorts of awards (EDN product of the year, etc.) National had to leave the old number in the catalog because lots of people already knew it by LM4562. In fact, National has a significant promotional campaign tied to the old number.

What sort of surprises me is that there are two complete sets of documentation for the thing, as if it were two parts. I wonder why they don't cross reference them in the documentation.
Dr. Dagor
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