Started soldering today. My plan is to leave off mcu etc. and use dac in default mode at first. everything in lower right will not be populated. Im using the SOIC opamps and the ADP151 regs. My only question so far is what to do with the ADDR pads. Let me know if you see anything amiss.
Thanks. Cheers.
Thanks. Cheers.
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I will use separate 5V power supply and not derived from V+ .
A superreg that will provide +5V and will not solder REG2 .
Also the transformer will have separate secondary at about 10V ac with separate diode and capacitors for this .
And a silver mica capacitor of 1nF in position of C12.
A superreg that will provide +5V and will not solder REG2 .
Also the transformer will have separate secondary at about 10V ac with separate diode and capacitors for this .
And a silver mica capacitor of 1nF in position of C12.
I will use separate 5V power supply and not derived from V+ .
A superreg that will provide +5V and will not solder REG2 .
Also the transformer will have separate secondary at about 10V ac with separate diode and capacitors for this .
And a silver mica capacitor of 1nF in position of C12.
Hi,
Do you mean to leave out REG2 and use separate superreg with separate winding from the transformer for feeding the DC-5V (circule in red) ?
400mA
Where do you get this figure from? Seems excessively high.
The 5V is about 100mA, and the 3.3V, 300mA....maybe excessively high but not much excessive!
Some shuntreg can provide 400mA...but the really critical voltage is buffered in the circuit by the lm4562 in follower configuration!
The schematic provide by Syllabe show a smart implementation of the DAC.
Some shuntreg can provide 400mA...but the really critical voltage is buffered in the circuit by the lm4562 in follower configuration!
The schematic provide by Syllabe show a smart implementation of the DAC.
Hi everyone,
The build continues. I think I have all SMD components mounted except for the ferrites. The jumpers are still open as well. My plan is to verify voltages and then gradually connect jumpers and beads. Let me know if there is a checklist I should follow. Please let me know if you see anything amiss. Thanks so much.
The build continues. I think I have all SMD components mounted except for the ferrites. The jumpers are still open as well. My plan is to verify voltages and then gradually connect jumpers and beads. Let me know if there is a checklist I should follow. Please let me know if you see anything amiss. Thanks so much.
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Hi,
Do you mean to leave out REG2 and use separate superreg with separate winding from the transformer for feeding the DC-5V (circule in red) ?
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Yes .
Ok in the range of 300mA ...350mA...400mA .
No shunt . I think you cannot do better sound to put shunt in this position
Better a classical lm723 with BD series like Subbu do on his DAC.
Or for the hurry ones a 5V low noise like LT17635 , very good for this position .
ADDR is the chip address. In stand alone, without MCU, we don't care about his value.
The ADDR pads appear to be a jumper. Should I close it if not using mcu?
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