OpenDAQ-MixedSignal-AFE
anikjain11·OpenDAQ-MixedSignal-AFE·hardware_kicad/opa656_test.kicad_pcb
About the OpenDAQ-MixedSignal-AFE PCB
OpenDAQ-MixedSignal-AFE is an open source PCB design by anikjain11, published on GitHub. It is a 4-layer board measuring 67 × 17 mm, with 18 components from 13 distinct parts.
By type, the board carries 3 crystals, 2 resistors and 1 connector.
From the project
OpenDAQ-AFE is an open-source, production-grade mixed-signal data acquisition (DAQ) and detector front-end architecture. Designed for high-energy physics instrumentation, this system bridges microscopic sensor physics to real-time digital signal processing.
OpenDAQ-AFE is an open-source, production-grade mixed-signal data acquisition (DAQ) and detector front-end architecture. Designed for high-energy physics instrumentation, this system bridges microscopic sensor physics to real-time digital signal processing.
It takes a sub-nanosecond, femtocoulomb-level current pulse generated by a particle hit on a semiconductor sensor, processes it through an ultra-low noise analog front-end (AFE), and digitizes the signal via a high-speed path.

OpenDAQ-MixedSignal-AFE bill of materials (BOM)
18 components, 13 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | opa656 | SOIC-8_3.9x4.9mm_P1.27mm | X1, X2 |
| 1 | ~ | SOIC-8_3.9x4.9mm_P1.27mm | X4 |
| 1 | Conn_01x03 | PinHeader_1x03_P2.54mm_Vertical | J1 |
| 1 | 70p | C_0805_2012Metric | Cd1 |
| 1 | 1p | C_0805_2012Metric | Cf1 |
| 2 | 100p | C_0805_2012Metric | Cf2, Cs1 |
| 1 | y1=0 y2=100u td1=10n tau1=1n td2=11n tau2=10n | PinHeader_1x03_P2.54mm_Vertical | I1 |
| 1 | 10k | R_0805_2012Metric | Rf2 |
| 1 | 500k | R_0805_2012Metric | Rpz1 |
| 1 | 800m | PinHeader_1x03_P2.54mm_Vertical | v1 |
| 4 | 5 | PinHeader_1x03_P2.54mm_Vertical | v2, v3, v4, v5 |
| 1 | 50Meg | R_0805_2012Metric | R1 |
| 1 | 100 | R_0805_2012Metric | R3 |
OpenDAQ-MixedSignal-AFE design files
The KiCad project lives in the anikjain11/OpenDAQ-MixedSignal-AFE repository on GitHub; these links point at the commit this page was built from.
OpenDAQ-MixedSignal-AFE: common questions
How big is the OpenDAQ-MixedSignal-AFE PCB?
The OpenDAQ-MixedSignal-AFE measures 67 × 17 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the OpenDAQ-MixedSignal-AFE?
18 components, from 13 distinct parts. The full bill of materials is listed on this page.
Where can I download the OpenDAQ-MixedSignal-AFE design files?
From the anikjain11/OpenDAQ-MixedSignal-AFE repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the OpenDAQ-MixedSignal-AFE design in my own project?
The repository has no license, so all rights stay with anikjain11. Use it as a reference, and ask the author before reusing the design.