• on Audio/Video/Photography
  • Published in issue 7/2002 on page 0
About the article

Mini Audio DAC

Mini Audio DAC
In the February 2002 issue of Elektor Electronics, we described an S/PDIF tester, consisting of a special decoder IC with integrated D/A converter. Two implementations of the ‘IEC 60958 audio DAC’ from Philips could be used here: the UDA1350ATS or the UDA1351TS. The latter has a frequency range up to 96 kHz. However, a number of readers were disappointed that this circuit was not accompanied by a PCB design. That is the reason that we present a similar ‘Mini Audio DAC’ here, this time with matching PCB layout.
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Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor Members can exclusively download these files for free as part of their Membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service. Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

Resistors:
R1 = 75Ohm
R2 = 1kOhm
R3,R4 = 10kOhm
R5,R6 = 100Ohm
R7 = 1Ohm
Capacitors:
C1 = 180pF
C2 = 10nF ceramic, lead pitch 5mm
C3 = 100nF ceramic, lead pitch 5mm
C6,C8,C10,C12,C14,C16 = 100nF, SMD shape 1206
C4,C5 = 47µ F 25V radial
C7 = 10µ F 63V radial
C9,C11,C13,C15,C17,C18 = 100µ F 25V radial
Inductors:
L1,L2,L3 = Murata BLM31AJ601SN1L (Farnell # 581-094)
Semiconductors:
D1 = high-efficiency LED, dia. 3mm
IC1 = UDA1351H (Philips)
Miscellaneous:
K1 = cinch (RCA) socket, PCB mount, e.g., Monarch T-709G
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