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Old 20th September 2013, 12:36 PM   #21
gk7 is offline gk7
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TI lists the LM4562 as active and has a datasheet from April 2013, this would rather
indicate that the LM4562 has not been relabeled to LME49720 (which is listed too
and has a datasheet of its own).
Either they did this for marketing reasons or the are different chips. (I have not compared
the current datasheets yet).
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Old 20th September 2013, 01:06 PM   #22
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Compared the datasheets; everything identical to the last digit, except for the LME49860 where output current and offset are specified for the higher supply voltage.
The LME49720 is the only one still available in a TO-99 package.
I guess that the chips are identical with the LME49860 tested for higher supply voltage.
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Old 20th September 2013, 04:30 PM   #23
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Quote:
Originally Posted by KSTR View Post
We have a statement here from an original product manager at National that reads the parts are 100% identical, it is the exact same silicon :
National opamp inflation

If anyone perceive different sound it's either normal part-to-part variation or just simply confirmation bias, I would dare say.
And I have heard the rumor that the 4562 was Walt Jung's swan song to the DIY audio community - and is nothing like the other chip.

Do you think that TI/National would admit this?
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Old 20th September 2013, 05:24 PM   #24
Electrons are yellow and more is better!
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... and the source to this was...?
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Old 12th October 2013, 06:13 AM   #25
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hi
can I run lme 49720 Whit single psu 5v ?

thanks . afshin
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Old 12th October 2013, 06:23 AM   #26
Electrons are yellow and more is better!
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Yes, but the inputs must be between 2 and 3 volts. It's not a rail-rail amplifier. It's not perfect for single voltage.
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Old 12th October 2013, 05:48 PM   #27
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Tack. För 8 år jag bott Göteborg. Min son föddes på Astrasjukhuset . Jag älskar Sverige.

Well I have decided after a good Amp Avp D/A Instead Njm2100 I use voltage 5 V
Are.
What do you suggest for the HiFi?

Thank you. afshin

Last edited by afshindiy; 12th October 2013 at 05:52 PM.
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