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Old 1st June 2007, 09:22 AM   #11
YFW is offline YFW  United States
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Default consider the spec.

I suggest you should condider the requirement of the circuit first.
NE5532 could work in higher supply voltage,for example,+/- 22V.
But OPA2134 could only work under +/-18V.

If you wanna change the OP,try to confirm the working voltage in advance.
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Old 1st June 2007, 01:20 PM   #12
ctong is offline ctong  United States
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Default Re: consider the spec.

Quote:
Originally posted by YFW
I suggest you should condider the requirement of the circuit first.
NE5532 could work in higher supply voltage,for example,+/- 22V.
But OPA2134 could only work under +/-18V.

If you wanna change the OP,try to confirm the working voltage in advance.

In most cases the supply voltage is below +-15V. I actually have not seen one going above +-18V. And I am not sure what benefit a designer gets out of a +-22V supply.
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Old 1st June 2007, 04:07 PM   #13
YFW is offline YFW  United States
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Default Re: Re: consider the spec.

Quote:
Originally posted by ctong



In most cases the supply voltage is below +-15V. I actually have not seen one going above +-18V. And I am not sure what benefit a designer gets out of a +-22V supply.
Some designers will increase the power supply voltage achieve higher dynamic range,although the signal output is tiny.
For a dual OP like NE5532 working in high voltage,maybe you could try OPA2604 which could work under +/-25V.
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Old 1st June 2007, 04:22 PM   #14
ctong is offline ctong  United States
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Default Re: Re: Re: consider the spec.

Quote:
Originally posted by YFW


Some designers will increase the power supply voltage achieve higher dynamic range,although the signal output is tiny.
For a dual OP like NE5532 working in high voltage,maybe you could try OPA2604 which could work under +/-25V.

Any particular component/model that uses such a high-voltage supply?
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Old 1st June 2007, 05:05 PM   #15
gootee is offline gootee  United States
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Default Re: Re: consider the spec.

Quote:
Originally posted by ctong



In most cases the supply voltage is below +-15V. I actually have not seen one going above +-18V. And I am not sure what benefit a designer gets out of a +-22V supply.
There might be lots of different reasons to use any particular supply voltages. Needing a larger output swing might be a common reason for using higher supply voltages.

One case might be when a device has better specs at +/-22V, for a particular application. For example, if you look at the OP275 datasheet, at http://www.analog.com , Figure 5 in the Applications section shows that in order to drive 10V RMS into 600 Ohms and still get low THD (Total Harmonic Distortion), the supply voltages must be >= +/-19V. For 1 kHz 10VRMS into 600 Ohms, with +/-18.5V supplies, the THD is about 0.1%. But with +/-19V supplies, the THD is about 0.001%, and decreases further as the supply voltages approach +/-22V.

- Tom Gootee

http://www.fullnet.com/~tomg/index.html

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Old 1st June 2007, 05:37 PM   #16
ctong is offline ctong  United States
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The original posting of this thread concerns the use of opamps in a CD player. My comment is in this context. I have not seen any player using a supply voltage higher than +-18V. There also is no need for a 10V rms output.
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Old 1st June 2007, 05:46 PM   #17
YFW is offline YFW  United States
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My suggestion is,if you wanna change the OP,confirm the working voltage first,because this will have possiblity to hurt the OP.
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Old 1st June 2007, 06:11 PM   #18
ctong is offline ctong  United States
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Default Re: NE5532 or OPA2134

Quote:
Originally posted by wandelblu
Hi!

I have a cd player SONY XA2-ES, It has four opamp NE5532, I'm thinking to change them with OPA2134.

Is it really a good sound improvement?

Can you give me some advices?


Best Regards.
Enzo

I am contemplating opa627s for my scd-c555es. But I need to use adapters and perhaps the soic packaging, which requires soldering SMT components, not a pleasant task. I will post my findings.
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Old 9th June 2007, 12:53 PM   #19
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I have ever changed my SONY XE600(A very cheap SACD Player and only sold in Japan & Taiwan.) from NJM4565M to OPA2132AU.

It sounds more wide and good in high frequency, but it losts the feeling of Sony; I mean it does not sound like Sony style.

At finally, I use OPA2111. It sounds very suitable for me. But, I think Sony style audio is very special. I will change OPA2111 to 4565 if I can get 4565.
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