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Old 20th May 2002, 05:49 PM   #1
dorkus is offline dorkus  United States
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Default one-shot dual opamp suggestion

hi,

i have a Sony DVP-NS500V, a cheapo DVD player which i bought for its multichannel SACD capability. it's turned out to sound rather good, at least with SACD (cd sounds mediocre but tolerable) so i figure it's worth my while to replace the opamps in it. it uses a bunch of 4558 dual opamps in SOIC packages, so i need a surface mount replacement (can't socket it). any suggestions? keep in mind that the power supply on this thing is pretty pathetic so i need something that is tolerant of such factors... a simple solder-and-play replacement. nothing too fancy here. ideas? i'm thinking OP275, OPA2604, OPA2134, LM6172, AD746... any other duals in SOIC packages you could suggest? remember, crappy power supply... so no twitchy parts please. i know much has already been said about opamps but i can't afford to try more than one part here (i might destroy the delicate SMT solder pads), so i'm interested in hearing everyone's one-shot suggestions for my application. just reply with a simple vote for one part or another, don't need to explain why.

thanks,
marc
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Old 20th May 2002, 06:40 PM   #2
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Default Re: one-shot dual opamp suggestion

[QUOTE]Originally posted by dorkus
[B]hi,

----------------------------------------------

Try 286 for I/V; 2604 or 2132 for others. Watch out for the strong adhesive that Sony uses for the SMTs.
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Old 20th May 2002, 06:49 PM   #3
dorkus is offline dorkus  United States
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cool, sounds good. this is just for output stage IC btw... i think the IVs are part of the LSI DAC IC they use in this model.
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Old 20th May 2002, 07:03 PM   #4
jam is offline jam  United States
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Marc,

You are correct the ic is used as a summer and amplifier. I like the 2604 myself. You could also try buffering the outputs.

Jam
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Old 21st May 2002, 04:59 AM   #5
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I would go with AD823 or AD8512.
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