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 24 components from 17 distinct parts.
Other key parts include the DIR9001PW, SN74LVC541APWR and TLV803ED29DBZR. By type, the board carries 10 capacitors, 8 resistors, 3 ICs, 2 connectors and 1 inductor.
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)
24 components, 17 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | DIR9001PW DIR9001PWR | Frozen_Package_SO__TSSOP-28_4.4x9.7mm_P0.65mm | U101 |
| 1 | SN74LVC541APWR | Frozen_Package_SO__TSSOP-20_4.4x6.5mm_P0.65mm | U102 |
| 1 | TLV803ED29DBZR | Frozen_Package_TO_SOT_SMD__SOT-23 | U103 |
| 1 | FCR684205R | Cliff_FCR684205R_ORJ5 | J101 |
| 1 | JBP_2x18_AB | TSW-118-08-S-D-RA_JBP_AB | J104 |
| 1 | 47uH | Frozen_Inductor_SMD__L_1210_3225Metric_Pad1.42x2.65mm_HandSolder | L101 |
| 3 | 100NF 100nF | Frozen_Capacitor_SMD__C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C101, C108, C109 |
| 2 | 100nF | Frozen_Capacitor_SMD__C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C102, C103 |
| 2 | 10uF | Frozen_Capacitor_SMD__C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C104, C105 |
| 1 | 68nF | Frozen_Capacitor_SMD__C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C106 |
| 1 | 4.7nF | Frozen_Capacitor_SMD__C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C107 |
| 1 | 30pF C0G 5% 50V | Frozen_Capacitor_SMD__C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C110 |
| 1 | 0R | Frozen_Resistor_SMD__R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R101 |
| 1 | 680 680R | Frozen_Resistor_SMD__R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R102 |
| 3 | 100 100R | Frozen_Resistor_SMD__R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R103, R104, R105 |
| 2 | 100R | Frozen_Resistor_SMD__R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R106, R107 |
| 1 | 10K 10k | Frozen_Resistor_SMD__R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R108 |
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?
24 components, from 17 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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