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"Reference" TDA1541A DAC with I2S-BUS architecture

Surface Finish for future PCB´s

  • ENIG - Electroless Nickle/Immersion Gold

    Votes: 93 48.7%

  • Immersion Silver

    Votes: 54 28.3%

  • Immersion Tin

    Votes: 24 12.6%

  • OSP - Organic Solderability Preservatives

    Votes: 20 10.5%
  • Total voters
    191
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dvb projekt

dvb projekt

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Joined 2009
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#1
After finalizing my "Reference" TDA1541A DAC with I2S-BUS architecture and many requests about that,
i am now starting a GB with it´s modules.

The single stages of the project, you could read HERE.

"Reference" TDA1541A DAC project module summary

The latest DAC version: "The new Red Baron V5.0"


The main goals:

- Modular architecture to get max. flexibility
- DAC cascadable
- Compl. I2S-BUS architecture


In the modular design i see the main advatage.
Every stage could be build upon the requirements:

- PS section
- Regulator section
- Input section
- DAC section
- Output section


Now here are the Modules


+/- Power Supply Module

9054800925_697d65b715_z.jpg


- up to 15 caps per rail (16mm to 18mm diameter)
- place for decoupling foil cap in each rail
- place for bleeder resistor
- 105µm copper weight
- 2mm pcb
- Immersion Gold
- green soldermask on both side
- Board size 195mm x 120mm



Shunt regulator modules
circuit design by Salas

An externally hosted image should be here but it was not working when we last tested it.


- Shunt regulator module for TDA1541A (+5V, -5V, -15V)
- separate Shunt regulator module for additional parts (+5V)
- 70µm copper weight
- 2mm pcb
- Immersion Gold
- green soldermask on both side
- Board size 147mm x 115mm (46mm x 115mm; single +5V)



TDA1541A DAC Module

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.


- separate TL431 Shunt regulators for each voltage line
- independent voltage rail for the DEM reclock circuit
- I2S attenuator circuit
- shortest possible position for decoupling caps
- separate ground line for decoupling caps
- Ground plane
- 2mm pcb
- Immersion Gold
- green soldermask on both side
- 35µm copper weight
- Board size 125mm x 125mm


The prices are:

+/- Power Supply Module: $23
TDA1541A shunt regulator Module: $20
Shunt regulator Module for add. +5V line: $10
TDA1541A DAC Module: $15

Worldwide shipping: $ 9
Europe shipping: $ 5
paypal fee: 3,9%


The prices will include a donation of $3 USD to diyAudio for every pcb sold.


For all who want to order a module of my "Reference TDA1541A DAC Project",
please send a mail to diyaudiopcb (at) gmx.com with your paypal address.​
 
Last edited:
#3
Production of TDA1541A DAC Module get´s updated Layout

The production of the TDA1541A DAC Module get´s some small updates!

An externally hosted image should be here but it was not working when we last tested it.



As you see, i corrected my small GND-Line failure at the DEM-CLK IC.
The needed connection between the GND-Line of the TDA & add. DEM-CLK IC are now connected on board.
So no external cable is necessary.

Also i insert a 2nd resistor for the -15V TL431 setting. So it is possible to insert two 10K0 resistors in parallel or one 5K0 solo.
Surely you can solder the two 10K0 one on the other as on my prototype pcb, but i think this looks better 😉

To keep the GND connection of the 14 TDA decoupling caps as short as possible, i change the GND-Pin´s to the top-layer (GND-Plane).

:cheers:
​
 
#9
Additional offer

For those who are also interested in the much faster NL17SZ02,
you could order my 74HC02 - NL17SZ02 adapter pcb.


An externally hosted image should be here but it was not working when we last tested it.



It will be shipped "ready to use" as on the photo below!

An externally hosted image should be here but it was not working when we last tested it.



The price for it is $7,50
paypal fee: 3,9%


I add a new row in the google excel sheet for it 😉


:cheers:
Oliver​
 
#10
Hi to all,
Very interesting thread.
-In order to understand this global project, where can i get schematic of it?
-My power amplifier needs 200mV to Pmax and Zinput is 40K : do I need preamplifier or I/V stage is able to drive directly my amplifier?
-I don't see any output filter, that means preamplifier do the job?
Thanks
Dom
 
#11
Hi Dom,

-In order to understand this global project, where can i get schematic of it?
Click to expand...

send me a PM.

-My power amplifier needs 200mV to Pmax and Zinput is 40K : do I need preamplifier or I/V stage is able to drive directly my amplifier?
Click to expand...

If you insert a R I/V of 47R you get a max output voltage of ~188mV (TDA1541A full scale current 4mA typical).
So you could try it directly, but i think it would be better with a buffer stage.

-I don't see any output filter, that means preamplifier do the job?
Click to expand...

My design is as straight as possible and use no output filter to get the maximal sound quality.

Best regards,
Oliver
 
#16
All payed pre orders are dispatched!
Please give a short feedback when you get the pcb´s.


For all who want to order a module of my "Reference TDA1541A DAC Project"
please send a mail to

diyaudiopcb (at) gmx.com

with your paypal address.


:wave2:
Oliver​
 
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