Oip opa818
About the Oip opa818 PCB
Oip opa818 is an open source PCB design by aewallin, published on GitHub. It is a 2-layer board measuring 25 × 25 mm, with 32 components from 20 distinct parts.
Other key parts include the LT3042xMSE, LT3093xMSE, OPA818IDRGx and BUF602xDBV. By type, the board carries 13 capacitors, 5 resistors, 4 ICs, 3 diodes, 2 connectors and 2 test points.
It belongs with the audio and test & measurement designs in this gallery.
From the project
Photodiode transimpedance amplifier, on a one inch diameter circular PCB
TIASim can be used to predict gain, noise, and bandwidth using different op-amps, transimpedance-gains, etc. Initial results show that capacitive loading on the MMCX connector, when connecting a coaxial cable to Spectrum Analyzer or Oscilloscope, plays a role. For un-buffered op-amps TIASim predictions agree with measurements when op-amp GBWP is 'de-rated' slightly - probably due to the capacitive load on the output. Latest PCB versions use a buffer/cable-driver BUF602 to isolate the sensitive transimpedance amplifier from output loading.
Main components on the Oip opa818
Oip opa818 bill of materials (BOM)
32 components, 20 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LT3042xMSE | MSOP-10-1EP_3x3mm_P0.5mm_EP1.68x1.88mm | U101 |
| 1 | LT3093xMSE | MSOP-12-1EP_3x4.039mm_P0.65mm_EP1.651x2.845mm | U102 |
| 1 | OPA818IDRGx | WSON-8-1EP_3x3mm_P0.5mm_EP1.45x2.4mm | U103 |
| 1 | BUF602xDBV | SOT-23-5 | U104 |
| 1 | Conn_Coaxial | MMCX_Molex_73415-1471_Vertical | J101 |
| 1 | Conn_01x03 | PinHeader_1x03_P2.54mm_Vertical | J102 |
| 1 | 10R | R_0402_1005Metric | RF1 |
| 1 | R | R_0402_1005Metric | RF101 |
| 2 | TestPoint | TestPoint_THTPad_D1.0mm_Drill0.5mm | TP101, TP102 |
| 2 | D | D_SOD-323F | D101, D103 |
| 1 | S597x | TO-18-3 | D102 |
| 1 | 100u | L_0805_2012Metric | L101 |
| 7 | 4u7 | C_0603_1608Metric | C101, C102, C103, C107, C112, C113, C114 |
| 1 | 10n | C_0603_1608Metric | C104 |
| 4 | 100n | C_0603_1608Metric | C105, C106, C108, C109 |
| 1 | C | C_0402_1005Metric | C115 |
| 1 | 10R | R_0402_1005Metric | R1 |
| 2 | 56k | R_0603_1608Metric | R101, R107 |
| 1 | 300R | R_0603_1608Metric | R102 |
| 1 | 49R9 | R_0603_1608Metric | R106 |
Oip opa818 design files
The KiCad project lives in the aewallin/One-Inch-Photodetector repository on GitHub; these links point at the commit this page was built from.
- LayoutOPA818/oip_opa818.kicad_pcb
- SchematicOPA818/oip_opa818.kicad_sch
Oip opa818: common questions
How big is the Oip opa818 PCB?
The Oip opa818 measures 25 × 25 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Oip opa818?
32 components, from 20 distinct parts. The full bill of materials is listed on this page.
Where can I download the Oip opa818 design files?
From the aewallin/One-Inch-Photodetector repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Oip opa818 design in my own project?
The repository has no license, so all rights stay with aewallin. Use it as a reference, and ask the author before reusing the design.
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