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Old 23rd January 2004, 09:03 PM   #1
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Default 4570C and 5218A

hi guys (and gals)!
i have scanned the net for information/specs. on these devices (opamps) ...but nothing, does anyone have any clue regarding the specs.?
those little fellows are encapsulated in 8 pin DIP package.
Are they dual opamps or just single ones?

any HELP would be appreciated
kind regards
/Ludvig.
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Old 23rd January 2004, 09:19 PM   #2
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Hi Ludvig!


They are dual op amp and bipolars...i never find nothing about them in the net.
They are very much used by the majors japonese manufacturers.(Pioneer , Onkyo,etc) in the phono input stage!

Is not much , but is all i know!!
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Old 23rd January 2004, 09:28 PM   #3
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wonderful!
then i probably can replace them with a dual OPA2134...?!
the victim is a Denon DA-500 DAC, i ripped off the cover and spotted those opamps...

Cheers mate, thanks for the quick reply!
/Ludvig.
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Old 17th February 2005, 12:30 AM   #4
EIRA is offline EIRA  Netherlands
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Hi Ludwig... I planned to change these M5218 as well. Did you do it (back then in 2002)? and did it work out satisfactory?
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Old 17th February 2005, 11:34 AM   #5
Leolabs is offline Leolabs  Malaysia
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If i was not wrong,datasheets of both are available at www.datasheetarchive.com.Personally for replacement of them,i will try any dual audio OP-AMP as long as pins compatibility is not an issue.
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Old 17th February 2005, 02:05 PM   #6
macboy is offline macboy  Canada
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You'll have more luck searching for M5218 (with A, AF, or AFP suffixes) and NJM4570 or JRC4570.
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Old 19th February 2005, 08:08 AM   #7
EIRA is offline EIRA  Netherlands
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Default M5218

I found the datasheet here: http://www.datasheetarchive.com/sear...218&sType=part
I changed the 5218 (slew rate 3 V/us) by and OPA2134 (slew rate 20 V/us) and put two larger capacitors in the power supply. A great improvement. more power in a shorte base, more open sound, more solid, softer mid. Absolute worthewile the 10 Euro's I paid for the 2134!
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