NOS R-2R DAC
About the NOS R-2R DAC PCB
NOS R-2R DAC is an open source PCB design by k16shikano, published on GitHub. It is a 4-layer board measuring 75 × 154 mm, with 29 components from 13 distinct parts.
Other key parts include the TPS7A3901DSCR and TPS7A2033PDBVR. By type, the board carries 16 capacitors, 8 resistors, 3 ICs and 2 connectors.
From the project
16ビットR-2RラダーによるDAコンバーターの設計
- TOSリンク（S/PDIF）からの44.1kHz入力 - ノンオーバーサンプリング - 左右2チャンネル - カードケージ構成（同一回路を1枚にまとめた SINGLEBOARD` あり）
DACCHANNEL と DACCHANNELAXIAL は同一の電気設計**で、S3 / S5 のどちらにも挿さります。 ラダー抵抗の実装方法だけが違います。
SINGLEBOARD もカードケージと同一の電気設計です。JBP とバックプレーンは無く、 R チャネルは 8xxx 参照（U8001 など）。±VREF はチャネルごとにローカル生成のままです。 信号層は F.Cu / In2.Cu / In3.Cu / B.Cu、In1.Cu と In4.Cu が GND ベタ（ラダー下は抜き）。 JRAW ヘッダ（J401 / J402` およびチャネル側）は基板上配線のタップとして残しています。
Main components on the NOS R-2R DAC
NOS R-2R DAC bill of materials (BOM)
29 components, 13 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | TPS7A3901DSCR | TI_DSC0010J_WSON-10_3x3mm_P0.5mm_EP | U701, U702 |
| 1 | TPS7A2033PDBVR | Frozen_Package_TO_SOT_SMD__SOT-23-5 | U703 |
| 1 | POWER_IN_1x4 | Phoenix_MSTB_2.5_4_G_5.08 | J701 |
| 1 | JBP_2x18_AB | TSW-118-08-S-D-RA_JBP_AB | J702 |
| 8 | 10uF | Frozen_Capacitor_SMD__C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C701, C702, C703, C704, C711, C712, C713, C714 |
| 1 | 100nF | Frozen_Capacitor_SMD__C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C705 |
| 5 | 10nF | Frozen_Capacitor_SMD__C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C706, C707, C715, C716, C717 |
| 2 | 2.2uF X7R | Frozen_Capacitor_SMD__C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C721, C722 |
| 1 | 90.9k 0.1% | Frozen_Resistor_SMD__R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R701 |
| 4 | 10.0k 0.1% | Frozen_Resistor_SMD__R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R702, R704, R712, R714 |
| 1 | 100k 0.1% | Frozen_Resistor_SMD__R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R703 |
| 1 | 11.8k 0.1% | Frozen_Resistor_SMD__R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R711 |
| 1 | 21.8k 0.1% | Frozen_Resistor_SMD__R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R713 |
NOS R-2R DAC design files
The KiCad project lives in the k16shikano/r2r-dac repository on GitHub; these links point at the commit this page was built from.
NOS R-2R DAC: common questions
How big is the NOS R-2R DAC PCB?
The NOS R-2R DAC measures 75 × 154 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the NOS R-2R DAC?
29 components, from 13 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 NOS R-2R DAC design files?
From the k16shikano/r2r-dac 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 NOS R-2R DAC design in my own project?
The repository has no license, so all rights stay with k16shikano. Use it as a reference, and ask the author before reusing the design.
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