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
- 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
- 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
- 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.
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

- 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:
Production of TDA1541A DAC Module get´s updated Layout
The production of the TDA1541A DAC Module get´s some small updates!
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).

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).

For all who sign up in the Pre-Order excel sheet,
please mail me your paypal address to:
diyaudiopcb (at) gmx.com
You get your invoice for your pre-ordered modules soon.
Thanks,
Oliver
please mail me your paypal address to:
diyaudiopcb (at) gmx.com
You get your invoice for your pre-ordered modules soon.
Thanks,
Oliver
One can never have one too many DAC. Put me down for one, Oliver! 😛
🙂 OK!
Please add yourself the wanted modules the google excel sheet (link in my signature) and
mail me your paypal address as written.
Best,
Oliver
Hi to all,
all pre ordered and payed modules are schedule to dispatch around Jun 23, 2010.

Oliver
all pre ordered and payed modules are schedule to dispatch around Jun 23, 2010.

Oliver
Additional offer
For those who are also interested in the much faster NL17SZ02,
you could order my 74HC02 - NL17SZ02 adapter pcb.
It will be shipped "ready to use" as on the photo below!
The price for it is $7,50
paypal fee: 3,9%
I add a new row in the google excel sheet for it 😉

Oliver
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 😉

Oliver
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
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
Hi Dom,
send me a PM.
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.
My design is as straight as possible and use no output filter to get the maximal sound quality.
Best regards,
Oliver
-In order to understand this global project, where can i get schematic of it?
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?
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?
My design is as straight as possible and use no output filter to get the maximal sound quality.
Best regards,
Oliver
Power schematic overview
On request, here is the power schematic overview of my complete project.
An externally hosted image should be here but it was not working when we last tested it.
All PCB´s arrived today!
Because of the world cup soccer match between Germany and Ghana this evening,
i will dispatch all payed pre orders on friday.

Oliver
Because of the world cup soccer match between Germany and Ghana this evening,
i will dispatch all payed pre orders on friday.

Oliver
Oliver, good luck to your Germany... USA already made it.. 😛 You got my payment right? I should have enough to make a complete set?
Oliver, good luck to your Germany... USA already made it.. 😛 You got my payment right? I should have enough to make a complete set?
Congratulation to the US Team

I got your payment and yes, you could make a complete set!
Best regards,
Oliver
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.

Oliver
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.

Oliver
Just got back from work, and a package was waiting for me
Boards look Absolutely fantastic
Thanks Oliver

Boards look Absolutely fantastic

Thanks Oliver

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