2 layers31.8 × 61.6 mm
2 layers100 × 64.9 mm
STM32 USB headphone DAC
- Size
- 100 × 64.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 86
- Nets
- 90
- Pads
- 306
- Tracks, vias
- 556, 87
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 5 (file 20210228)
- Created
- 12 Apr 2021
- Updated
- 18 May 2026
Overview
Dac is an open-source printed circuit board by sambazley, from the sambazley/dac repository on GitHub. It is a 2-layer board of 100 × 64.9 mm with 86 parts on 90 nets, routed with 556 tracks and 87 vias.
It is built around the DIR9001PW, PLR135/T8 and LM4562NA, with the CS4350-CNZ, AP7335-WG and SN74LVC157ADRG3 among its other parts. Its parts include 28 capacitors, 23 resistors, 10 ICs, 4 connectors and 4 switches. It belongs with the audio and music boards and the STM32 boards of this library.
Main components
8
DIR9001PW
TSSOP-28-40℃~+85℃ 2.7V~3.6V 28kHz~108kHz Built-in phase-locked loop I2S Transceiver TSSOP-28 Audio Interface ICs ROHSTexas InstrumentsAudio Interface ICs
PLR135/T8
插件Fiber Optic Receiver Plugin Fiber Optical Transceivers ROHSEverlight ElectronicsFiber Optical Transceivers
LM4562NA
PDIP-8-17V~-2.5V、2.5V~17V -40℃~+85℃ 0.00003% 10mA 120dB 2-Channel PDIP-8 Audio Amplifiers ROHSTexas InstrumentsAudio Amplifiers
CS4350-CNZ
QFN-24-EP(4x4)-40℃~+85℃ 2 24 3.3V~5V Digital filtering、Power-down mode、Differential output SPI、I2C Sigma-Delta QFN-24-EP(4x4) ADCs/DACs - Special Purpose ROHSCirrus LogicDigital To Analog Converters (DACs)
AP7335-WG
SOT-25-40℃~+85℃@(Ta) 1 200mV@(300mA) 300mA 65dB@(1kHz) 800mV~5V 80uA 9V Adjustable Over Current Protection、Short Circuit Protection、Thermal Shutdown Positive SOT-25 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSDiodes IncorporatedVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SN74LVC157ADRG3
SOIC-16-40℃~+85℃ 1uA 24mA 24mA 2V~3.6V 3ns@3.3V,50pF 74LVC Level shifting Single Supply SOIC-16 Signal Switches, Multiplexers, Decoders ROHSTexas InstrumentsSignal Switches, Multiplexers, Decoders
MMBTA06
SOT-23-55℃~+150℃ 1 NPN 100MHz 100nA 250mV 300mW 400 4V 500mA 80V NPN SOT-23 Bipolar (BJT) ROHSALJBipolar (BJT)
EC2-4.5NU
插件-40℃~+85℃ 1ms 2 Form C: 2C (DPDT-CO) 220V@DC、250V@AC 2A 2ms 4.5V Silver Alloy 插件 Signal Relays ROHSKEMETSignal Relays
README
README.mdHeadphone DAC and amplifier
Parts
86| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 1k | Resistor_SMD:R_0805_2012Metric | R3, R4, R6, R9, R10, R11, R12, R13, R14, R15, R16 |
| 8 | 100n | Capacitor_SMD:C_0805_2012Metric | C2, C3, C6, C8, C15, C23, C25, C26 |
| 8 | 10u | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | E2, E3, E4, E5, E6, E7, E8, E9 |
| 6 | 1n | Capacitor_SMD:C_0805_2012Metric | C14, C16, C17, C18, C19, C20 |
| 5 | 10u | Capacitor_SMD:C_0805_2012Metric | C5, C9, C11, C12, C13 |
| 5 | 1u | Capacitor_SMD:C_0805_2012Metric | C1, C4, C7, C10, C22 |
| 4 | 10k | Resistor_SMD:R_0805_2012Metric | R5, R19, R20, R22 |
| 3 | MMBTA06 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3 |
| 2 | 100k | Resistor_SMD:R_0805_2012Metric | R7, R8 |
| 2 | 4k7 | Resistor_SMD:R_0805_2012Metric | R2, R21 |
| 2 | 68 | Resistor_SMD:R_0805_2012Metric | R17, R18 |
| 2 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J3, J4 |
| 2 | LED | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1, D2 |
| 2 | LM4562 | Package_DIP:DIP-8_W7.62mm_Socket | U5, U6 |
| 2 | LTC1983 | Package_TO_SOT_SMD:SOT-23-6 | U3, U4 |
| 2 | SW_SPDT | misc:M2012SA2W40 | SW1, SW2 |
| 1 | 10n | Capacitor_SMD:C_0805_2012Metric | C24 |
| 1 | 15k | Resistor_SMD:R_0805_2012Metric | R1 |
| 1 | 3u3 | Capacitor_SMD:CP_Elec_4x4.5 | E1 |
| 1 | 47u | Inductor_SMD:L_Taiyo-Yuden_NR-50xx | L1 |
| 1 | 4n7 | Capacitor_SMD:C_0805_2012Metric | C27 |
| 1 | 4u7 | Capacitor_SMD:C_0805_2012Metric | C21 |
| 1 | 680 | Resistor_SMD:R_0805_2012Metric | R23 |
| 1 | 68n | Capacitor_SMD:C_0805_2012Metric | C28 |
| 1 | AP7335 | Package_TO_SOT_SMD:SOT-23-5 | U1 |
| 1 | AudioJack3 | misc:SJ-63053A | J1 |
| 1 | CS4350 | Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm | U2 |
| 1 | D | Diode_SMD:D_SOD-523 | D3 |
| 1 | DIR9001 | Package_SO:TSSOP-28_4.4x9.7mm_P0.65mm | U8 |
| 1 | EC2-4.5NU | Relay_THT:Relay_DPDT_Kemet_EC2 | K1 |
| 1 | PLR135 | misc:PLR135 | U7 |
| 1 | R_POT_Dual 10k | misc:PTD902-2020K-A103 | RV1 |
| 1 | STM32F042F4Px | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U10 |
| 1 | SW_Push | Button_Switch_SMD:SW_SPST_PTS645 | SW3 |
| 1 | USB_B | misc:UJ2-BH-TH | J2 |
| 1 | SN74LVC157ADR | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U9 |
Questions
How big is the Dac PCB?
It measures 100 × 64.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Dac use?
86 parts, built around the DIR9001PW, PLR135/T8, LM4562NA and CS4350-CNZ. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Dac KiCad files?
From the sambazley/dac repository on GitHub, at the commit this page was made from: the board is pcb/project.kicad_pcb and its schematic pcb/project.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Dac design in my own project?
Its repository states no licence, so its author keeps all rights: ask sambazley before reusing the design.
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