HardLabs

Max2-audio dac

dilshan·max2-audio-dac·design/max2-dac.kicad_pcb

Max2-audio dac PCB layout, top view — open source board by dilshan

About the Max2-audio dac PCB

Max2-audio dac is an open source PCB design by dilshan, published on GitHub under the MIT license. It is a 2-layer board measuring 101.8 × 52.5 mm, with 153 components from 29 distinct parts.

Other key parts include the EPM240T100C5, MCP602 and LM1117-3.3. By type, the board carries 118 resistors, 23 capacitors, 4 connectors, 3 ICs, 2 diodes and 1 crystal.

It belongs with the audio designs in this gallery.

From the project

24-bit Stereo Audio DAC for Raspberry Pi

This is a 24-bit stereo DAC, which is specifically built for Raspberry Pi boards. This R-2R ladder DAC is developing around Intel / Altera EPM240T100C5N CPLD.

DAC which described in this repo can directly connect with the I2S interface of Raspberry Pi boards. The recommended supply voltage for this DAC is 5V to 8V.

The MCP602 opamp of this module is capable to drive headphone directly. An external AF power amplifier must pair with this module to obtain a higher output power.

Max2-audio dac, from the project README
From the project README

Main components on the Max2-audio dac

EPM240T100C5MCP602LM1117-3.3

Max2-audio dac bill of materials (BOM)

153 components, 29 distinct parts.

QtyPartRefs
1
EPM240T100C5
U1
1
MCP602
U2
1
LM1117-3.3
U3
1
50.00MHz
X1
1
I2S
J1
1
JTAG
J2
1
AF-OUT
J3
1
DC-IN
J4
2
10K
RV1, RV2
1
PWR
D1
1
SS14
D2
2
100pF
C1, C2
3
0.01MFD
C3, C5, C8
2
4.7MFD
C4, C6
11
0.1MFD
C7, C10, C11, C12, C13, C14, C15, C16 +3
1
100MFD
C9
1
470MFD
C20
1
0.1MFD
C21
1
0.22MFD
C22
1
10MFD
C23
Show 9 more
QtyPartRefs
4
22K
R1, R2, R3, R4
3
0R
R5, R117, R118
4
10K
R6, R7, R8, R9
1
1K
R10
50
15K
R11, R13, R15, R17, R19, R21, R23, R25 +42
48
7.5K
R12, R14, R16, R18, R20, R22, R24, R26 +40
2
2.2K
R109, R113
4
100K
R110, R111, R114, R115
2
560R
R112, R116

Max2-audio dac design files

The KiCad project lives in the dilshan/max2-audio-dac repository on GitHub; these links point at the commit this page was built from.

Max2-audio dac: common questions

How big is the Max2-audio dac PCB?

The Max2-audio dac measures 101.8 × 52.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Max2-audio dac?

153 components, from 29 distinct parts. The full bill of materials is listed on this page.

Where can I download the Max2-audio dac design files?

From the dilshan/max2-audio-dac repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Max2-audio dac design in my own project?

Yes, under the terms of its MIT license, which dilshan chose for the repository.

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