2 layers187.8 × 39.8 mm
2 layers64 × 55 mm
PiADAC
423F26/project2ZynADAC is an Input/Output Audio Interface for the RBPi.
- Size
- 64 × 55 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 80
- Nets
- 98
- Pads
- 337
- Tracks, vias
- 1,086, 88
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 10 Aug 2026
- Updated
- 30 Oct 2026
Overview
PiADAC is an open-source printed circuit board by 423F26, from the 423F26/project2 repository on GitHub. It is a 2-layer board of 64 × 55 mm with 80 parts on 98 nets, routed with 1,086 tracks and 88 vias.
It is built around the PCM1863DBTR, PCM5242RHBR and NCP1631D, with the AT24CS01-STUM-T among its other parts. Its parts include 32 capacitors, 31 resistors, 6 ICs, 6 connectors and 2 diodes.
Main components
4
PCM1863DBTR
TSSOP-30-40℃~+125℃ 110dB 2 24 3.3V 4.2V 8kHz Built-in Built-in SPI、I2C Support Yes TSSOP-30 Analog to Digital Converters (ADC) ROHSTexas InstrumentsUncategorised
PCM5242RHBR
VQFN-32-EP(5x5)-25℃~+85℃ 2 3.1V~3.46V 300uA、500uA 32 384kHz I2C、SPI VQFN-32-EP(5x5) Digital to Analog Converters (DAC) ROHSTexas InstrumentsDigital To Analog Converters (DAC)
NCP1631D
SOIC-16-55℃~+150℃ 10V~20V 500mA 5mA 65kHz 800mA CRM、DCM PFCController SOIC-16 PFC Controllers ROHSonsemiAC-DC Controllers And Regulators
AT24CS01-STUM-T
SOT-23-5-40℃~+85℃ 1,000,000 cycles 1.7V~5.5V 100 Years 1Kbit 1MHz 5ms Hardware write protection function、Noise suppression function、Built-in power-on reset (POR) I2C SOT-23-5 EEPROM ROHSMicrochip TechnologyEEPROM
README
HW/piADAC/README.mdZynADAC
ZynADAC is an Input/Output Audio Interface for the RBPi.
It features:
- Burr Brown (Texas Instruments) PCM5242 (DAC)
- Burr Brown (Texas Instruments) PCM1863 (ADC)
- 2 x ultra-low jitter oscillators (44.1 & 48 KHz)
- 3 x dedicated ultra-low noise LDOs (analog DAC, analog ADC, digital)
This design is inspired in the Hifiberry soundcards.
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License
Parts
80| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 10uf16v | Capacitor_SMD:C_0805_2012Metric | C1, C2, C3, C4, C5, C6, C7, C8, C9, C13, C17 |
| 10 | 100R | Resistor_SMD:R_0603_1608Metric | R3, R4, R9, R12, R14, R19, R21, R22, R25, R27 |
| 5 | 100nf25v | Capacitor_SMD:C_0402_1005Metric | C12, C21, C28, C30, C31 |
| 5 | 10k | Resistor_SMD:R_0402_1005Metric | R1, R2, R20, R23, R24 |
| 5 | 1uf16v | Capacitor_SMD:C_0603_1608Metric | C14, C25, C33, C34, C35 |
| 4 | 1.1kΩ | PCM_JLCPCB:R_0603 | R5, R26, R30, R32 |
| 4 | 100K | Resistor_SMD:R_0402_1005Metric | R8, R10, R11, R13 |
| 4 | 2,2nf50v | Capacitor_SMD:C_0402_1005Metric | C10, C11, C16, C20 |
| 4 | 2.7kΩ | PCM_JLCPCB:R_0603 | R6, R29, R31, R33 |
| 4 | 470R | Resistor_SMD:R_0402_1005Metric | R15, R16, R17, R18 |
| 3 | ncp163 | Package_TO_SOT_SMD:SOT-23-5 | U3, U4, U5 |
| 2 | 100nf16v | Capacitor_SMD:C_0402_1005Metric | C19, C23 |
| 2 | 1uf 16v | Capacitor_SMD:C_0603_1608Metric | C24, C26 |
| 2 | AudioJack2_Ground | zynthiandac:conn_audio3 | J4, J5 |
| 2 | LED | LED_THT:LED_D3.0mm | D1, D2 |
| 1 | 100nF25V | Capacitor_SMD:C_0402_1005Metric | C18 |
| 1 | 100nf25V | Capacitor_SMD:C_0402_1005Metric | C15 |
| 1 | 1uf16V | Capacitor_SMD:C_0603_1608Metric | C22 |
| 1 | 22.5792Mhz | Oscillator:Oscillator_SMD_Abracon_ASDMB-4Pin_2.5x2.0mm | X1 |
| 1 | 24.576Mhz | Oscillator:Oscillator_SMD_Abracon_ASDMB-4Pin_2.5x2.0mm | X2 |
| 1 | AT24CS01-STUM | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | AudioJack2_Ground_Switch | zynthiandac:conn_audio5 | J3 |
| 1 | Conn_02x10_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x10_P2.54mm_Vertical | J2 |
| 1 | Conn_2x20 | Connector_PinSocket_2.54mm:PinSocket_2x20_P2.54mm_Vertical | J6 |
| 1 | Conn_2x20 | Connector_PinHeader_2.54mm:PinHeader_2x20_P2.54mm_Vertical | J1 |
| 1 | LOGO | LOGO | G*** |
| 1 | PCM1863DBT | pcm1863:PCM1863DBT | U1 |
| 1 | PCM5242RHBR | pcm5242:PCM5242RHBR | U6 |
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Questions
How big is the PiADAC PCB?
It measures 64 × 55 mm and has 2 copper layers, 1.6 mm thick.
What parts does the PiADAC use?
80 parts, built around the PCM1863DBTR, PCM5242RHBR, NCP1631D and AT24CS01-STUM-T. 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 PiADAC KiCad files?
From the 423F26/project2 repository on GitHub, at the commit this page was made from: the board is HW/piADAC/piADAC.kicad_pcb and its schematic HW/I-O/HWIO/HWIO.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the PiADAC design in my own project?
Its repository states no licence, so its author keeps all rights: ask 423F26 before reusing the design.