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Usbc-3.5mm dac amp adapter

Vaaxs·usbc-3.5mm-dac-amp-adapter

Usbc-3.5mm dac amp adapter PCB layout, top view — open source board by Vaaxs

About the Usbc-3.5mm dac amp adapter PCB

Usbc-3.5mm dac amp adapter is an open source PCB design by Vaaxs, published on GitHub. It is a 2-layer board measuring 62.5 × 22.5 mm, with 24 components from 15 distinct parts.

Other key parts include the PCM2704CDB. By type, the board carries 12 capacitors, 7 resistors, 2 connectors, 1 IC, 1 crystal and 1 fuse.

It belongs with the audio designs in this gallery.

From the project

Project for Stasis, a DAC amp that is also an adapter, to go from USB-C to 3.5mm.

This is a small PCB dongle that plugs into USB-C and gives you a clean 3.5mm headphone output with no drivers or setup- plug and play

My Bluetooth headphones broke, so I bought IEMs, but they don't work with my phone, so I decided to make this adapter for me to use

USB-C in → PCM2704CDB DAC → 3.5mm TRS out.

The PCM2704CDB is a USB Audio Class-compliant DAC from Texas Instruments. It shows up as a standard audio device on Windows, macOS, and Linux the moment you plug it in — no firmware, no drivers, nothing to install. The chip has its own internal 5V to 3.3V regulator, so there's no…

Usbc-3.5mm dac amp adapter, from the project README
From the project README

Main components on the Usbc-3.5mm dac amp adapter

PCM2704CDB

Usbc-3.5mm dac amp adapter bill of materials (BOM)

24 components, 15 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
PCM2704CDB
Texas Instruments
U1
1
ABM8-12.000MHZ-12-B1U-T
Crystal_GND24
Abracon
Y1
1
TYPE-C-31-M-12
USB_C_Receptacle_USB2.0_16P
Korean Hroparts Elec
J1
1
SJ-3523-SMT
AudioJack3
CUI / Same Sky
J2
1
MF-MSMF050-2
Polyfuse
Bourns
F1
2
GRM21BR61A106KE18L
10uF
Any
C1, C6
4
GRM155R61A105KE15D
1uF
Any
C2, C3, C4, C5
2
GRM32ER61A107ME20L
100uF
Any
C7, C8
2
GRM155R71H223KA12D
22nF
Any
C9, C10
2
GRM1555C1H180JA01D
18pf
Any
C14, C15
2
RC0402FR-0716RL
16Ω
Any
R1, R2
1
RC0402FR-073K3L
3.3kΩ
Any
R3
1
RC0402FR-0710KL
10kΩ
Any
R4
1
RC0402FR-071ML
1MΩ
Any
R5
2
RC0402FR-075K1L
5.1k
Any
R6, R7

Usbc-3.5mm dac amp adapter design files

The KiCad project lives in the Vaaxs/usbc-3.5mm-dac-amp-adapter repository on GitHub; these links point at the commit this page was built from.

Usbc-3.5mm dac amp adapter: common questions

How big is the Usbc-3.5mm dac amp adapter PCB?

The Usbc-3.5mm dac amp adapter measures 62.5 × 22.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Usbc-3.5mm dac amp adapter?

24 components, from 15 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Usbc-3.5mm dac amp adapter design files?

From the Vaaxs/usbc-3.5mm-dac-amp-adapter repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Usbc-3.5mm dac amp adapter design in my own project?

The repository has no license, so all rights stay with Vaaxs. Use it as a reference, and ask the author before reusing the design.

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