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 122 components from 21 distinct parts.
Other key parts include the SN74LVC595APWR, TMUX1134PWR and OPA2192IDR. By type, the board carries 89 resistors, 22 capacitors, 7 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)
122 components, 21 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | SN74LVC595APWR | Frozen_Package_SO__TSSOP-16_4.4x5mm_P0.65mm | U3001, U3002 |
| 4 | TMUX1134PWR | Frozen_Package_SO__TSSOP-20_4.4x6.5mm_P0.65mm | U3003, U3004, U3005, U3006 |
| 1 | OPA2192IDR | Frozen_Package_SO__SOIC-8_3.9x4.9mm_P1.27mm | U3007 |
| 1 | JRAW_1x3 | JST_PH_S3B-PH-K-S_1x03_P2.00mm_Horizontal | J3001 |
| 1 | JBP_2x18_AB | TSW-118-08-S-D-RA_JBP_AB | J3002 |
| 1 | 200R precision trimmer | Frozen_Potentiometer_THT__Potentiometer_Bourns_3296W_Vertical | RV3001 |
| 1 | ferrite bead | Frozen_Inductor_SMD__L_0805_2012Metric_Pad1.15x1.40mm_HandSolder | FB3001 |
| 2 | 4.7uF | Frozen_Capacitor_SMD__C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C3001, C3013 |
| 11 | 100nF | Frozen_Capacitor_SMD__C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3002, C3003, C3004, C3006, C3007, C3008, C3009, C3010 +3 |
| 3 | 100nF | Frozen_Capacitor_SMD__C_0805_2012Metric_Pad1.18x1.45mm_HandSolder_NO_SILK | C3005, C3011, C3015 |
| 1 | 4.7uF | Frozen_Capacitor_SMD__C_1206_3216Metric_Pad1.42x1.75mm_HandSolder_NO_SILK | C3014 |
| 3 | 1uF | Frozen_Capacitor_SMD__C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3017, C3018, C3051 |
| 2 | 1uF DNP | Frozen_Capacitor_SMD__C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3019, C3020 |
| 1 | 10k | Frozen_Resistor_SMD__R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3001 |
| 18 | 100k | Frozen_Resistor_SMD__R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3002, R3003, R3030, R3031, R3032, R3033, R3034, R3035 +10 |
| 16 | 150R | Frozen_Resistor_SMD__R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3010, R3011, R3012, R3013, R3014, R3015, R3016, R3017 +8 |
| 1 | 100R | Frozen_Resistor_SMD__R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3050 |
| 1 | 10.0k 0.1% | Frozen_Resistor_SMD__R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3060 |
| 1 | 9.88k 0.1% | Frozen_Resistor_SMD__R_0805_2012Metric_Pad1.20x1.40mm_HandSolder_NO_SILK | R3061 |
| 2 | 10R DNP | Frozen_Resistor_SMD__R_0805_2012Metric_Pad1.20x1.40mm_HandSolder_NO_SILK | R3062, R3063 |
Show 1 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 49 | 33.0k | R_Axial_Vertical_P1.90mm_D0.80mm_QuarterWatt | R3101, R3102, R3103, R3104, R3105, R3106, R3107, R3108 +41 |
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?
122 components, from 21 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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