Diy DAC with AD1955 ???

[joke]

Hi I 'am total newby ...
But does any body have some shematics how to conect cd transport with I2S to AD1955 ???
Or any chematic of DAC with 1955 ???
I have see some DAC with AD1865 and TDA1543 which use CS8412 , but could not find any thing on AD1955...
On AD web pages I have found only shematic with AD1955 and I/V stage with AD797...

Is diy DAC with AD1955 just too complicated for a newby ???

Any answer will be great help

Thanks
Josip

 

[machinow]

AD1955

Hi, Joke,
I'm also interested in a design w. AD1955. In fact, I'm designing something with it. I don't know when I wll be ready, but surely I'll make a schematics and a PCB for this.
However, If you take source IIS from some other hardware /not your DIY/ it's greatly reccomendable that you can obtain low-jitter source for the DAC. Try upgrading the Clock Source first, and if you want, I'll keep you in touch w. my design.
AD 1955 is a good sigma-delta /one of the best/ and is easy to connect to IIS source. It requires, however, external I-V conversion and great care must be taken here. I prefer trying LC-filtering of the HF against using very expencice op-amps like AD797, AD8620 , AD811 etc. My design will use NE5532A or OPA2134.
Regards,
Kaloyan

 

[joke]

Thanks for replay Kaloyan

Josip

 

[ditter]

AD1955 DIY DAC

I`m work
current project
SM5847+Ad1955 (external filter settings)+AD8138(I-V stage)+(AD8131+AD9631 diff to single )=LPF
power supply op2177+blue led. BG&OScon,Wima FKP
PCB layout about 80% very hard on 2 layers ,very slow (start december 2002)
from VAU1254 signal input to EPM3064 by Altera.
sorry my bad english

 

[joke]

Thanks people for yours replays

Maybe some one could poste some drowing how to conect CS8414 and AD1955 ?

Thanks

Josip

 

[Norbert]

AD1955 Board for DAC5

Hi,

I'm currntly working on a DIR1703/AD1955 module for my DAC5-project. Just in case you don't know the design: "http://www.diyaudio.de/html/dac5.html".

Regards,

Norbert

 

[Õàëÿâùèê]

Hi, joke
Anything difficult is not present. Download datasheet for CS8414, and look, how will expose a format of an output.
You need I2S format, 24bit.
FSYNC =LRCK, other outputs and so are clear, only four wires.

Regards
halyavshick

 

[joke]

Hi Norbert...I know about yours DAC design and I drop by on yours web page from time to time just to see whats new

Õàëÿâùèê

I have datashits for CS8414/8413 and AD1955 ...
so what should I connect

CS8414 Ad1955
MCK - MCLK
VERF - ?
SCK - ?
FSYNC - LRCLK

Whell any way thank you folks for your answers but I think I 'am goon' put this on coold and read more about DAC... ...and I have to finish my Aleph-X ...so...

Regards Josip

 

[Õàëÿâùèê]

joke
ÑS8414 -> AD1955

SDATA -> SDATA (pin4 of AD1955) data
SCK -> BCLK (pin3) bitclock for data
FSYNC -> LRCLK (pin2) wordclock for data (left ch/rigth ch.)
MCK ->MCKL (pin28) main system clock

It`s standard for wires of I2S-link.

VERF is pin for indicating errors in audio data signal (see page 20 datasheet). It can be not used.

See also tab3 page 21
You need in

M2 M1 M0

0 1 0 (2-OUT L/R , I2S Compatible)
low high low


AD1955
see page 6 of datasheet for it
PD/RST pin - reset (autoreset by power-on if high)
the SPI pins (24,25, and 26) should be tied to DGND or DVDD. (DGND better)
pin9 DSD_PHASE should be connected low (DGND).


Shematic for CS8414 but AD1853. But circuit difficult, there is used indication of a format of an digital input. DjVu format.

http://www.zeuslab.newmail.ru/images/D24/d24sch.djvu
AD1955 ñan work with the data up to 48kHz only, if the external microcontroller is not represented.

This shematic from
Zeuslab pages (russian DIY audio laboratory)
There are a lot of different shematics and photos DIY DACs, including devoted 1X oversampling, but text in Russian.

Regards
Halyavshick

 

[joke]

Thanks Halyavshick

Josip

 

[machinow]

My AD1853/AD1955 DAC is /almost/ READY

So few months ago I started this project: AD1852, AD1853 and AD1955 compatible DAC with various Vreg and circuit options. The design is modular, so here are the modules.....

 

[machinow]

Input PCB

This is the Input PCB module, screenshot of the CAD PCB view

 

[machinow]

AD1853/AD1955 combined PCB module. There are 4 Vregs here, with different circuit topologies.

 

[machinow]

This is the AD1852 PCB CAD View Screenshot. A little simplified with on-board LPF/Analog stage

 

[machinow]

On the input modules there are AD1896 ASRC and CS8415 SPDIF receiver, software cotrolled

 

[takashi]

why dont search inn google?
you will find my work~
http://www.audioworkshop.com.hk/download/AW_D2.pdf
http://www.audioworkshop.com.hk/download/D2_bom.PDF

http://www.audioworkshop.com.hk/report/d2_2/d2_2.htm


I use DIR1703 + AD1955

 

[machinow]

Basically I've used a different topology, yet being on modular basis, so handling lots of experiments.
Generally it is Resampling stand-alone DAC with fixed /low-jitter/ oscillator and various options for power supply Regs. and I/V converters. The main idea is to do some evaluation on a good-quality PCBs, determing differencies between various topologies fof these chips. I've already got some of the modules working right and sounding fine.

 

[jwb]

I really need to learn Chinese and start visiting these Chinese DIY sites. People are always posting really nice designs, and I get the feeling I'm missing a lot on this english-only site. Everything I see from Hong Kong or Taiwan or even Japan, Korea, Singapore, etc seems to have a subtly different design aesthetic, and of course regionally popular components. The DAC linked above looks very nice!

 

[machinow]

Pic

So it's time some PICs to come....

 

[machinow]

AD1955 board