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Digital Line Level DACs, Digital Crossovers, Equalizers, etc.

Alternative to the SAA7220 for TDA1541 dac's
Alternative to the SAA7220 for TDA1541 dac's
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Old 21st April 2016, 06:37 AM   #11
percival007 is offline percival007  England
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Will the WM8804 not drive the TDA1541 directly?
Less processing, No Digital Filtering, Less Component Count......=Better Sound (?).

Just a thought.
I drive a TDA1541 with a WM8805, directly. Very, very nice. :-)

P.
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Old 21st April 2016, 06:54 AM   #12
esgigt is offline esgigt  Netherlands
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Quote:
Originally Posted by percival007 View Post
Will the WM8804 not drive the TDA1541 directly?
Less processing, No Digital Filtering, Less Component Count......=Better Sound (?).

Just a thought.
I drive a TDA1541 with a WM8805, directly. Very, very nice. :-)

P.
Yes, it will. But it does not have the upsampling/filter capability the SAA7220 has. One would need an extra CS8421 to accomplish the same functionality.
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Old 21st April 2016, 12:57 PM   #13
Eldam is offline Eldam  France
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no one has emulated this in a Rasberry ? http://vasiltech.narod.ru/files/PMD100.pdf
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Old 21st April 2016, 04:50 PM   #14
Torchwood421 is offline Torchwood421  United States
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Default PMD100

Quote:
Originally Posted by Eldam View Post
no one has emulated this in a Rasberry ? http://vasiltech.narod.ru/files/PMD100.pdf
That would be an excellent digital filter however go price one. The NPC SM5814 is cheap. It features more taps and best of all it is doing 18 bit math. SAA7220 is 14 bit math. Sound difference is large. Better clarity and the trebles are awesome with the NPC chip. Something no NOS D/A in my experience can do. Nice if someone would emulate the PMD100....
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Old 22nd April 2016, 11:30 AM   #15
Eldam is offline Eldam  France
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Is there any jitter measurement of this chip ?

Problem with such a chip is like the Philips it's more Noisy or have more jitter than the dac chip itself ?

Because with the modern front end which have very low jitter level you may waste the whole result by introducing such a chip between the front end and the final dac chip.

But if it sound good at ears, it's also a good sign ...
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Old 22nd April 2016, 11:52 AM   #16
esgigt is offline esgigt  Netherlands
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@Torchwood421: are there other digital filters with better availability than the NPC SM5814, eg. the SM5840?

I searched for it on the internet, but was not able to even find the datasheet.
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Old 22nd April 2016, 01:27 PM   #17
Torchwood421 is offline Torchwood421  United States
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Location: Prior Lake, MN
Default NPC SM5814

Quote:
Originally Posted by Eldam View Post
Is there any jitter measurement of this chip ?

Problem with such a chip is like the Philips it's more Noisy or have more jitter than the dac chip itself ?

Because with the modern front end which have very low jitter level you may waste the whole result by introducing such a chip between the front end and the final dac chip.

But if it sound good at ears, it's also a good sign ...
I have never seen any jitter testing and don't have that equipment available. The chip came out in the late 1980's and didn't get much attention. In that time most of the datasheets didn't even make it to the internet such as it was. My cousin got his datasheet from a distributor that was selling it. The better the input receiver the better the results. So it works great with the DIR9001 however even better with the WM8804. So for me what sets it apart is the quality of the treble. Crystal clear with such detail. This assumes a very good I/V and downstream circuitry. My Mark II D/A I consider reference quality. It took years to get it there.
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Old 22nd April 2016, 01:29 PM   #18
Torchwood421 is offline Torchwood421  United States
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Exclamation Datasheet

Quote:
Originally Posted by esgigt View Post
@Torchwood421: are there other digital filters with better availability than the NPC SM5814, eg. the SM5840?

I searched for it on the internet, but was not able to even find the datasheet.
I tried to attach it and it was to large. PM me with an email and I will send it to you. See my response to Eldam why it can't be found on the internet.
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Old 22nd April 2016, 01:34 PM   #19
Torchwood421 is offline Torchwood421  United States
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Exclamation SM5840

Quote:
Originally Posted by esgigt View Post
@Torchwood421: are there other digital filters with better availability than the NPC SM5814, eg. the SM5840?

I searched for it on the internet, but was not able to even find the datasheet.
SM5840 is 2's complement, MSB first, right justified both input and output. So not really easy to use. You need I2S output....
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Old 22nd April 2016, 03:50 PM   #20
Torchwood421 is offline Torchwood421  United States
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Exclamation Picture of datasheet

Best I can do without a scanner.... Copy picture and rotate in your viewer. Page 1.
Attached Images
File Type: jpg IMG_0462.jpg (980.6 KB, 266 views)
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