Electronics > Beginners
NEC (UP)C4570C replacement opamp?
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obiwanjacobi:
Hi,

I'm trying to fix two dead channels on a Roland M-480 line mixer. The channel board has a couple of NEC (?) C4570C opamps on them.
I am looking for a replacement for this opamp because I don't think any of the major suppliers carry it anymore.

My google-kungfu is not that good and I could not find any replacement suggestions...




PS: If someone has the schematic for the Roland M-480 I would be very interested  :P

Thanx,
Marc
david77:
I'd suggest the NE5532. I haven't read through the whole datasheet of the NEC device, but on first glance it looks as if the NE5532 should do nicely.
T4P:
For line mixing a NE5532 will do just fine.
obiwanjacobi:
I hope I took the correct value from the sheets...

C4570CNE5532Supply Voltage16V15VOutput Current10 mA8-16 mALarge Signal Voltage Gain30-30050-100Slew Rate5-7 V/uS9 V/uSGBW10-15 MHz10 MhzTHD (%)0.002?Channel Separation120 dB110 dB
Looks pretty good to me  :)
Thanx!
David Aurora:
Still available, I bought some not long ago from RS I think. I'll take a look...

Yep, here we go (not the same brand or exact model but surely close enough)- http://australia.rs-online.com/web/c/semiconductors/amplifiers-comparators/op-amp/?searchTerm=4570

You can also get these things from manufacturers, I've ordered them from Yamaha Pro Audio's service department before when I wanted to be sure I got the closest match.

I think you could whack a bunch of different chips in and get the same result though if necessary, these don't seem to be anything too crucial in mixing boards where I've seen/replaced them
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