Mdac attenuator
About the Mdac attenuator PCB
Mdac attenuator is an open source PCB design by FutureSharks, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 45.7 × 52.1 mm, with 28 components from 14 distinct parts.
Other key parts include the AD8599 and DAC8812ICPWG4. By type, the board carries 11 capacitors, 9 resistors, 2 ICs, 2 connectors and 1 LED.
It belongs with the audio and displays & leds designs in this gallery.
From the project
An digitally controlled hi fi preamplifier 🔈🎵
- Precision, AC Reference Signal Attenuator Using the AD5546/AD5556 Multiplying DAC - New High-Resolution Multiplying DACs Excel at Handling AC Signals
This design is also used by a number manufacturers:
- Mark Levinson preamps - Luxman LECUA (Luxman Electronically Controlled Ultimate Attenuator) - Accuphase AAVA
65536 linear steps Gain possible, set by op-amp and resistors Excellent performance Can drive headphones Compact SPI controlled
Main components on the Mdac attenuator
Mdac attenuator bill of materials (BOM)
28 components, 14 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AD8599 | SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | DAC8812ICPWG4 | TSSOP-16_4.4x5mm_P0.65mm | U2 |
| 1 | Conn_01x06_Male | Molex_KK-254_AE-6410-06A_1x06_P2.54mm_Vertical | J1 |
| 1 | Conn_01x06_Male | PinHeader_1x06_P2.54mm_Vertical | J2 |
| 3 | Conn_01x03_Male | Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | IN1, OUT1, PWR1 |
| 1 | LED | LED_1206_3216Metric | LED1 |
| 2 | 2pF | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1A1, C1B1 |
| 3 | CP | CP_Elec_8x10 | C2_SMD1, C3_SMD1, C5_SMD1 |
| 3 | CP | CP_Radial_D10.0mm_P5.00mm | C2_TH1, C3_TH1, C5_TH1 |
| 3 | 100nF | C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C4, C6, C7 |
| 1 | R | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R1 |
| 2 | 91R | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R1A1, R1B1 |
| 4 | 120R | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R2A1, R2B1, R4A1, R4B1 |
| 2 | 360R | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R3A1, R3B1 |
Mdac attenuator design files
The KiCad project lives in the FutureSharks/preamp-two repository on GitHub; these links point at the commit this page was built from.
Mdac attenuator: common questions
How big is the Mdac attenuator PCB?
The Mdac attenuator measures 45.7 × 52.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Mdac attenuator?
28 components, from 14 distinct parts. The full bill of materials is listed on this page.
Where can I download the Mdac attenuator design files?
From the FutureSharks/preamp-two repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Mdac attenuator design in my own project?
Yes, under the terms of its GPL-3.0 license, which FutureSharks chose for the repository.
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