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Headphone-DAC-with amp

r4ptor·headphone-DAC-with-amp

Headphone-DAC-with amp PCB layout, top view — open source board by r4ptor

About the Headphone-DAC-with amp PCB

Headphone-DAC-with amp is an open source PCB design by r4ptor, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 88.9 × 73.7 mm, with 70 components from 31 distinct parts.

Other key parts include the PCM2707CPJT, PCM1794ADBR, TPS60501DGSR, OPA2134PA and LM2662M/NOPB. By type, the board carries 31 capacitors, 26 resistors, 6 ICs, 3 connectors, 1 crystal and 1 fuse.

It belongs with the audio designs in this gallery.

From the project

A portable (headphone) USB DAC with a separate conversion stage.

A simple and portable audio digital to analogue converter with amplifying abilities.

The Texas Instruments PCM2707 serves as the USB interface. This interface provides a clock and I2S signal for the main Hifi digital to analogue converter, the PCM1794A.

Since this converter needs a 3.3V power source a LP5907 ultra-low-noise LDO is being used to generate the desired voltage.

Headphone-DAC-with amp, from the project README
From the project README

Main components on the Headphone-DAC-with amp

PCM2707CPJTPCM1794ADBRTPS60501DGSROPA2134PALM2662M/NOPB

Headphone-DAC-with amp bill of materials (BOM)

70 components, 31 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
PCM2707CPJT
PCM2707PJTG4
U1
1
PCM1794ADBR
PCM1794A
U2
1
TPS60501DGSR
TPS60501DGS
U3
2
OPA2134PA
U4, U5
1
LM2662M/NOPB
LM2662M
U6
1
CX5032GB12000H0PESZZ
12Mhz
Y1
1
629105150521
USB_OTG
J1
1
SJ1-3523N
HID_JMP
J2
1
AUDIOJACK3_GROUND
AudioJack3_Ground
J3
1
0685T2500-01
Polyfuse
F1
1
LTST-C170TBKT
LED blue
D1
1
BK2125HS470-T
1A
L1
2
08051A220KAT2A
22pF
C1, C2
7
CC0805KKX7R6BB105
1uF
C3, C5, C6, C7, C8, C19, C20
2
EEE-1VA100SR
10uF
C4, C13
4
EEE-1CA470WR
47uF
C9, C10, C30, C31
3
EEE-1VA100SR
10uF
C11, C15, C17
3
CL21F104ZBCNNNC
0.1uF
C12, C14, C16
1
C0805C225K8RACTU
2.2uF
C18
1
CL21A106KPFNNNG
10uF
C21
Show 11 more
QtyPartRefs
4
C0805C472KARECAUTO
4.7nF
C22, C23, C24, C25
4
CL21C010CBANNNC
1nF
C26, C27, C28, C29
1
ERA-6AEB105V
1M
R1
2
RNCP0805FTD1K50
1.5k
R2, R5
4
RC0805FR-0722RL
22R
R3, R4, R22, R23
2
RNCF0805DTE10K0
10k
R6, R8
1
RMCF0805JT560R
560R
R7
8
RC0805FR-07887RL
887R
R10, R11, R12, R13, R14, R15, R20, R21
4
ERA-6AEB1021V
1.02k
R16, R17, R18, R19
3
RNCP0805FTD10R0
10R
R24, R25, R26
1
ERJ-6ENF47R0V
47R
R27

Headphone-DAC-with amp design files

The KiCad project lives in the r4ptor/headphone-DAC-with-amp repository on GitHub; these links point at the commit this page was built from.

Headphone-DAC-with amp: common questions

How big is the Headphone-DAC-with amp PCB?

The Headphone-DAC-with amp measures 88.9 × 73.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Headphone-DAC-with amp?

70 components, from 31 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 Headphone-DAC-with amp design files?

From the r4ptor/headphone-DAC-with-amp repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Headphone-DAC-with amp design in my own project?

Yes, under the terms of its GPL-3.0 license, which r4ptor chose for the repository.

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