R2RDAC2026 REVIZE II
About the R2RDAC2026 REVIZE II PCB
R2RDAC2026 REVIZE II is an open source STM32 PCB design by ERDALECE, published on GitHub under the GPL-3.0 license. It is a 6-layer board measuring 246 × 120 mm, with 919 components from 125 distinct parts.
Its main chip is the STM32H750XBHx, from the STM32 family. Other key parts include the CS8416-xZZ, 74LS595, SN74LVC245AN, SN74LVC1G04DBVR and LT3042xMSE. By type, the board carries 470 resistors, 276 capacitors, 70 ICs, 31 diodes, 18 connectors and 13 test points.
It belongs with the audio and displays & leds designs in this gallery.
From the project
ZeyBack R2RDAC
High-performance DIY USB Audio / FPGA based R-2R DAC platform.
The STM32H750 MCU plays audio in 44.1 kHz - 768 kHz PCM and DSD64 - DSD512 DSD (DoP) formats.
Optionally, a second USB audio input can be added by connecting an XMOS or AMANERO.
SPDIF audio input up to 192 kHz is possible via the CS8416 or directly through the FPGA input.
It has one coaxial and two optical inputs.
Main components on the R2RDAC2026 REVIZE II
R2RDAC2026 REVIZE II bill of materials (BOM)
919 components, 125 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CS8416-xZZ | TSSOP-28_4.4x9.7mm_P0.65mm | U1 |
| 12 | 74LS595 | TSSOP16_SOT403-1_NXP_NEX | U2, U6, U9, U30, U33, U36, U43, U44 +4 |
| 24 | SN74LVC245AN Texas Instruments | TSSOP-20_4.4x6.5mm_P0.65mm | U3, U4, U5, U7, U8, U10, U29, U31 +16 |
| 9 | SN74LVC1G04DBVR Texas Instruments | SOT-753 | U11, U27, U28, U38, U39, U40, U59, U60 +1 |
| 4 | LT3042xMSE | MSOP-10-1EP_3x3mm_P0.5mm_EP1.68x1.88mm | U12, U25, U69, U70 |
| 1 | Si5342A-D | QFN-44-1EP_7x7mm_P0.5mm_EP5.2x5.2mm | U13 |
| 1 | USB3320C-EZK | QFN32_5X5MC_MCH | U14 |
| 1 | ADV7611BSWZ | SW_64_2_ADI | U15 |
| 3 | SI8660BC-B-IS1R | SOIC16_SI823_SKY | U16, U17, U18 |
| 1 | IR2153 | DIP-8_W7.62mm_Socket | U19 |
| 1 | XC7A100T-CSG324 | BGA-324_15.0x15.0mm_Layout18x18_P0.8mm_Ball0.45mm_Pad0.4mm_NSMD | U20 |
| 1 | TPS62130RGTT | TPS62130 | U21 |
| 2 | SN74LVC1G125DBVR Texas Instruments | SOT-23-5 | U22, U23 |
| 3 | TPS562201DDCR | DDC0006A_N | U24, U26, U61 |
| 1 | CH340G | SOIC-16_3.9x9.9mm_P1.27mm | U63 |
| 2 | OPA2134UA | SOIC-8_3.9x4.9mm_P1.27mm | U64, U66 |
| 1 | W25Q128JVS | SOIC-8_5.23x5.23mm_P1.27mm | U65 |
| 1 | STM32H750XBHx | TFBGA-265_14x14mm_Layout17x17_P0.8mm | U67 |
| 1 | AP2127K-1.8 | SOT-23-5 | U68 |
| 2 | IRFR120N | TO-252-2 | Q1, Q2 |
Show 105 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | MJD44H11 | TO-252-2 | Q3, Q4 |
| 1 | BC847 | SOT-23-3 | Q5 |
| 1 | 28.63636 mhz | Crystal_SMD_5032-2Pin_5.0x3.2mm | X1 |
| 2 | 24.576 mhz | Oscillator_SMD_SeikoEpson_SG8002LB-4Pin_5.0x3.2mm | X2, X3 |
| 1 | XLH736022.579200I Crystal_GND24 IDT, Integrated Device Technology Inc | Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | XLH736022.579200I 12 Mhz IDT, Integrated Device Technology Inc | Crystal_SMD_5032-2Pin_5.0x3.2mm | Y2 |
| 1 | XLH736022.579200I 50mhz IDT, Integrated Device Technology Inc | Oscillator_SMD_EuroQuartz_XO53-4Pin_5.0x3.2mm_HandSoldering | Y3 |
| 2 | NC3MBH-B | Jack_XLR_Neutrik_NC3MBH-B_Horizontal | J1, J2 |
| 1 | Conn_01x04 | PinHeader_1x04_P2.54mm_Vertical | J3 |
| 1 | USB_B_Micro | USB_Mini-B_Lumberg_2486_01_Horizontal | J4 |
| 1 | XMOS | PinHeader_2x10_P2.54mm_Vertical | J5 |
| 1 | USB_B | USB_B_Lumberg_2411_02_Horizontal | J6 |
| 2 | HDMI_A | HDMI_A_Molex_208658-1001_Horizontal | J7, J8 |
| 1 | Conn_01x03_Pin | Stocko_MKS_1653-6-0-303_1x3_P2.50mm_Vertical | J9 |
| 3 | Conn_02x08_Odd_Even | PinHeader_2x08_P2.54mm_Vertical | J10, J11, J13 |
| 3 | Conn_01x02 | PhoenixContact_MCV_1,5_2-G-3.81_1x02_P3.81mm_Vertical | J12, J17, J18 |
| 1 | Conn_01x06 | PinHeader_1x06_P2.54mm_Vertical | J14 |
| 1 | Conn_01x04_Pin | PinHeader_1x04_P2.54mm_Vertical | J15 |
| 1 | Conn_01x05 | PinHeader_1x05_P2.54mm_Vertical | J16 |
| 1 | Jumper_3_Open | SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm_NumberLabels | JP1 |
| 2 | EC2-5NU | Relay_DPDT_Kemet_EC2 | K1, K2 |
| 2 | TORX177 | TORX177 | OPT1, OPT2 |
| 1 | RCA | RCA | RCA1 |
| 4 | 50 | Potentiometer_Bourns_3296W_Vertical | RV1, RV2, RV3, RV4 |
| 4 | 2.2k | Potentiometer_Bourns_3296W_Vertical | RV5, RV6, RV7, RV8 |
| 2 | SW_Push | SW_SPST_CK_RS282G05A3 | SW2, SW3 |
| 1 | Transformer_1P_2S | EE2006 | T1 |
| 4 | TestPoint | PinSocket_1x01_P2.54mm_Vertical | TP2, TP7, TP12, TP13 |
| 8 | TestPoint | TestPoint_Loop_D2.50mm_Drill1.0mm | TP4, TP5, TP6, TP8, TP9, TP10, TP14, TP15 |
| 1 | 1v | TestPoint_Loop_D2.50mm_Drill1.0mm | TP11 |
| 1 | DIGITALTRAFO | DIGITALTRAFO | TRF1 |
| 4 | LTST-C150KRKT DSS20-0015B Lite-On Inc. | D_SOD-323_HandSoldering | D1, D3, D4, D5 |
| 13 | LTST-C150KRKT RED Lite-On Inc. | LED_0805_2012Metric | D2, D12, D13, D14, D15, D18, D19, D20 +5 |
| 12 | DSS20-0015B | D_SOD-323_HandSoldering | D6, D7, D8, D9, D10, D16, D23, D24 +4 |
| 1 | DSS20-0015B | D_SMA | D11 |
| 1 | USBLC6-2SC6 | SOT-23-6 | D17 |
| 1 | FerriteBead_Small | R_0603_1608Metric | FB1 |
| 1 | 10 uH | L_1206_3216Metric | L1 |
| 1 | 1 uH | L_1206_3216Metric | L2 |
| 1 | 82103C 1 uH Murata Power Solutions Inc. | L_1206_3216Metric | L3 |
| 2 | 82103C 2,2uH Murata Power Solutions Inc. | L_Coilcraft_LPS3314 | L4, L9 |
| 1 | 2.2uh | L_Taiyo-Yuden_NR-60xx | L5 |
| 1 | 82103C 3,3uH Murata Power Solutions Inc. | L_Coilcraft_LPS4018 | L6 |
| 4 | 82103C 10uH Murata Power Solutions Inc. | L_Coilcraft_LPS5030 | L7, L8, L10, L11 |
| 95 | 100nf | C_0603_1608Metric | C1, C2, C3, C4, C5, C6, C8, C9 +87 |
| 14 | 10uf/6.3 | CP_EIA-3216-18_Kemet-A | C7, C23, C27, C29, C33, C36, C209, C222 +6 |
| 2 | 22pf | C_0603_1608Metric | C12, C13 |
| 4 | 10nf | C_0603_1608Metric | C16, C55, C56, C77 |
| 2 | 1 uf | C_0603_1608Metric | C19, C20 |
| 1 | 1uf | C_0805_2012Metric | C21 |
| 2 | 10uF | C_1206_3216Metric | C24, C274 |
| 24 | 100 nf | C_0603_1608Metric | C25, C32, C35, C61, C62, C63, C179, C207 +16 |
| 2 | 10uf/16v | CP_EIA-3216-18_Kemet-A | C31, C34 |
| 2 | 22 pf | C_0603_1608Metric | C37, C38 |
| 4 | 10 nf | C_0603_1608Metric | C39, C200, C201, C202 |
| 15 | 100 nf | C_0402_1005Metric | C45, C76, C189, C190, C204, C205, C208, C213 +7 |
| 2 | CP_Radial_D8.0mm_P2.50mm | CP_Radial_D10.0mm_P7.50mm | C52, C53 |
| 1 | 470pf | C_0603_1608Metric | C54 |
| 4 | 1000uf/10v | CP_Radial_D10.0mm_P3.50mm | C57, C58, C59, C60 |
| 4 | 47uf/10v | C_1210_3225Metric | C64, C65, C254, C255 |
| 4 | 4.7uf | C_0805_2012Metric | C66, C67, C256, C260 |
| 9 | 10uf | C_0805_2012Metric | C68, C69, C72, C73, C75, C265, C266, C270 +1 |
| 4 | 4.7uf | C_0603_1608Metric | C70, C71, C246, C248 |
| 45 | 100uf | C_1206_3216Metric | C74, C84, C85, C86, C87, C88, C89, C90 +37 |
| 8 | 100 pf | C_0603_1608Metric | C80, C81, C82, C83, C219, C240, C241, C245 |
| 4 | 100uf | C_0603_1608Metric | C126, C138, C150, C161 |
| 2 | 1 nf | C_0603_1608Metric | C170, C199 |
| 3 | 2.2uf | C_0805_2012Metric | C173, C174, C175 |
| 4 | 100nf | C_0402_1005Metric | C182, C210, C211, C269 |
| 1 | 22 nf | C_0603_1608Metric | C198 |
| 1 | 47uf/6.3 | CP_EIA-3216-18_Kemet-A | C237 |
| 1 | 3.3nf | C_0603_1608Metric | C242 |
| 1 | 4,7uF/16 | CP_EIA-3216-18_Kemet-A | C243 |
| 7 | 1 uf | C_0805_2012Metric | C249, C253, C257, C258, C259, C263, C264 |
| 4 | 470uf/16v | CP_Radial_D10.0mm_P3.50mm | C267, C268, C275, C276 |
| 100 | 2R | R_0603_1608Metric | R1, R2, R3, R4, R5, R6, R7, R8 +92 |
| 184 | R | R_0603_1608Metric | R9, R10, R11, R12, R13, R14, R15, R17 +176 |
| 4 | 33 | R_0603_1608Metric | R48, R60, R73, R273 |
| 96 | VAR | R_0603_1608Metric | R50, R161, R266, R267, R367, R368, R369, R370 +88 |
| 10 | 1k | R_0603_1608Metric | R51, R55, R57, R58, R68, R162, R163, R263 +2 |
| 6 | 4,7k | R_0603_1608Metric | R52, R53, R81, R82, R272, R466 |
| 1 | 390k | R_0603_1608Metric | R54 |
| 2 | 75 | R_0603_1608Metric | R56, R64 |
| 1 | 51k | R_0603_1608Metric | R59 |
| 1 | 22.1k | R_0603_1608Metric | R61 |
| 2 | 100k | R_0603_1608Metric | R62, R98 |
| 8 | 22 | R_0603_1608Metric | R63, R65, R69, R70, R71, R72, R261, R262 |
| 1 | 54.9k | R_0603_1608Metric | R66 |
| 10 | 10k | R_0603_1608Metric | R67, R80, R90, R92, R100, R109, R259, R274 +2 |
| 1 | 1,5k | R_0603_1608Metric | R74 |
| 2 | 27 | R_0603_1608Metric | R75, R77 |
| 1 | 8.06k | R_0603_1608Metric | R76 |
| 9 | 100 | R_0603_1608Metric | R78, R83, R84, R85, R86, R87, R88, R91 +1 |
| 1 | 13,7k | R_0603_1608Metric | R79 |
| 8 | 1k | C_0603_1608Metric | R89, R106, R107, R108, R268, R460, R461, R462 |
| 1 | 200k | R_0603_1608Metric | R93 |
| 4 | 31k | R_0603_1608Metric | R94, R99, R105, R160 |
| 2 | 10 | R_0603_1608Metric | R95, R96 |
| 1 | 15k | R_0603_1608Metric | R97 |
| 2 | 47k | R_0603_1608Metric | R101, R102 |
| 4 | 4.7k | R_0603_1608Metric | R103, R104, R159, R264 |
| 2 | 10 | R_1812_4532Metric | R265, R271 |
| 1 | 1m | C_0603_1608Metric | R269 |
| 1 | 3k | R_0603_1608Metric | R459 |
| 4 | R_4x0402_Convex | R_Array_Convex_4x0402 | RN1, RN2, RN3, RN4 |
R2RDAC2026 REVIZE II design files
The KiCad project lives in the ERDALECE/ZeyBack repository on GitHub; these links point at the commit this page was built from.
R2RDAC2026 REVIZE II: common questions
What microcontroller does the R2RDAC2026 REVIZE II use?
The R2RDAC2026 REVIZE II is built around the STM32H750XBHx, from the STM32 family.
How big is the R2RDAC2026 REVIZE II PCB?
The R2RDAC2026 REVIZE II measures 246 × 120 mm, has 6 copper layers and is 1.6 mm thick.
How many components are on the R2RDAC2026 REVIZE II?
919 components, from 125 distinct parts. The full bill of materials is listed on this page.
Where can I download the R2RDAC2026 REVIZE II design files?
From the ERDALECE/ZeyBack repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the R2RDAC2026 REVIZE II design in my own project?
Yes, under the terms of its GPL-3.0 license, which ERDALECE chose for the repository.
Can I test firmware for the R2RDAC2026 REVIZE II without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
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