Saa7000

[jean-paul]

Found the schematics AND pcb layout for PCF3523P. It is as said before a chip for SPDIF output in Sony/Philips format for use with chips like SAA7210 that do not have Dout pins ( this is what the documentation says ).

 

[rfbrw]

Found the schematics AND pcb layout for PCF3523P. It is as said before a chip for SPDIF output in Sony/Philips format for use with chips like SAA7210 that do not have Dout pins ( this is what the documentation says ).

Be that as it may, it still confers no advantage over any other SPDIF transmitter out there as it uses the I2S interface.

 

[Jocko Homo]

Pardon the interuption, but.........

Some of you guys think that is just me. It isn't:

that overrated waste of sand, the TDA1541/A.

Thanks for pointing that out.

Jocko

 

[Bernhard]

Re: Pardon the interuption, but.........

Isn`t thy SAA7000 very useful ?
Seperates two`s complement into left and right:
two`s complement or offset binary.
And outputs 16 bit.
Allows to implement PCM56 instead of TDA1540 into CD104/204/304 players. 😀
Or PCM53 😀 😀 😀

Maybe it helps me to hack the little Denon SMD chip in the DCD1800R that converts 16 bit seriell to 16 bit parallel.

Anybody knows a chip that performs that function ?

By the way I found a website where passive I/V with 1k resistor is promoted to be very good with some R2R DAC chips like PCM61 and hopefully also PCM56. But not TDA1541.

http://pw2.netcom.com/~wa2ise/radios/tubedac.htm

 

[Rtop84]

You can also use two AD1851 instead TDA1540P.

 

[rfbrw]

Re: Re: Pardon the interuption, but.........

two`s complement or offset binary.

Not without a little help from it's friends

 

[phofman]

rfbrw, we met recently on the discussion about removing SAA7030. Though I kind of wonder why you did not tell me right away about the easy way of switching SAA7000 to 14 bits ( 🙂 ), I have to confess I do admire your expertise and knowledge of the digital circuits, especially the ancient SAA/TDA family. Would you mind giving a few words about your background, how you gained the knowledge, and so on?

Sorry guys for this offtopic.

 

[rfbrw]

rfbrw, we met recently on the discussion about removing SAA7030. Though I kind of wonder why you did not tell me right away about the easy way of switching SAA7000 to 14 bits ( 🙂 ), I have to confess I do admire your expertise and knowledge of the digital circuits, especially the ancient SAA/TDA family. Would you mind giving a few words about your background, how you gained the knowledge, and so on?

Sorry guys for this offtopic.

I got the impression the CD300 doesn't use the SAA7000. As for the SAA/TDA chips, I just read the datasheets though I imagine time spent in Telecoms, Digital Video and other stuff helps.

 

[rolcas]

Hello, after searching for information how to implement AD1851 in old marantz/philips containing Philips SAA7000/7010/7020 chips decided to ask for some help here. I tried the mod with AD1851, but it don't want to play. Jobs done:
1. removed SAA7030
2. inverted clock between SAA7000 and AD1851 with 74LS04
3. str1 of SAA7000 connected to AD1851 latch
4. Data of SAA7000 to data of AD1851
5. leg 38 of SAA7020 connected to +5V
Could you please provide some guidance about that?

 

[rfbrw]

It is possible that the somewhat extreme version of stop clocked operation used by the SAA7000 is incompatible with the AD1851. Some glue logic may be necessary.

 

[Nazar_lv]

In a Denon DCD1800R

good player but need some upgrades

or can SAA7000 output 16bit ?

can, pin 16 selects bit lenght

 

[rolcas]

Solved, the problem was as I understand high latency of maybe faulty 74LS04 (don't know why), The trace in skope was ok (inverted clock), but there was noise in out of DAC (similar like using dac with uninverted clock). After changing inverter to another 74LS04 , the system statrted to operate normaly.
There is significant improvement of sound. The aim of this experiment was to compare different DAC's in one player (old TDA1540 and newer designed AD1851). Some people like the so-called "Philips" sound, but I don't like it because of lack of higher frequencies clearness (quet early internal DAC rollof causing significant drop of amplitude at 16KHz).
While I'm working with live sound, just wanted to hear instrument more naturally, not so colored like 1540. So AD1851 is significant step forward in clarity and dynamics. Just pluged in - that DAC seemed too harsh, but after some hours of playing it started to be OK.

 

[noizas]

Short experiment using TDA1540 with 16 bit mode of SAA7000

Hi Zoran,

Because this thread is related to SAA7000, I have decided to post here result of my short experiment of using TDA1540 in 16 bit mode instead of 14 bit mode of SAA7000 in Philips CD-304.
I connected pin 16 of SAA7000 back to GND instead of pull up to +5V by 1K resistor.

Sound was very distorted in 16 bit mode due to loss of two most significant bits.
I have recorded CD-304 output to my headphones by phone same 30 second interval from Peter's Gabriel "Solsbury hill" in both modes - zip files are attached.
Quality of soundtracks is awful, but anyway you will hear difference 😉.
Soundtracks are in .m4a format and can be easily played by VLC media player.

Best wishes
Saulius

 

[lcsaszar]

In offset binary (TDA1540 input format) you go from 0000 to FFFF in 16-bit mode. In 14-bit mode you go to 0000 to 3FFF, that is the lower 1/2 of the corresponding analogue signal negative half period. Unusable for human consumption

 

[Zoran]

Yes, thanks for the effort and experiment 🙂
.