2 layers34 × 45 mm
2stage tia
aewallin/Photodetector_2stage_OPA818
Measurement data overlaid with TIASim predictions show a parasitic feedback-capacitance of ca 0.15-0.17 pF when no Cf (C126 in shematic) capacitor is installed.
57 parts15
2 layers49.5 × 36.8 mm
SpikeLNA
cellularmitosis/SpikeLNAA Low Noise Amplifier for measuring switcher spikes.
- Size
- 49.5 × 36.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 25
- Nets
- 17
- Pads
- 68
- Tracks, vias
- 101, 0
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 3
- Created
- 7 Jul 2014
- Updated
- 22 Apr 2017
Overview
SpikeLNA is an open-source printed circuit board by cellularmitosis, from the cellularmitosis/SpikeLNA repository on GitHub, published under the MIT licence. It is a 2-layer board of 49.5 × 36.8 mm with 25 parts on 17 nets, routed with 101 tracks and 0 vias.
It is built around the OPA657U. Its parts include 11 resistors, 7 capacitors, 4 connectors, 2 ICs and 1 switch. It belongs with the audio and music boards of this library.
Main components
1README
README.mdSpikeLNA
A Low Noise Amplifier for measuring switcher spikes.
Status
This board is untested.
Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 1uF | BOXCAP_02_03_02_059A | C5, C6, C7, C8, C11 |
| 3 | 22 | R_AXIAL_0W25_059A | R1, R2, R11 |
| 2 | 10 | R_AXIAL_0W25_059A | R6, R10 |
| 2 | 100 | R_AXIAL_0W25_059A | R5, R9 |
| 2 | 100uF | MedCap | C1, C2 |
| 2 | 10k | R_AXIAL_0W25_059A | R3, R7 |
| 2 | 1k | R_AXIAL_0W25_059A | R4, R8 |
| 2 | BNC | PIN_ARRAY_2X1 | P3, P4 |
| 2 | CONN_2 | PIN_ARRAY_2X1 | P1, P2 |
| 2 | OPA657U | SO8E | U1, U2 |
| 1 | DPST | PIN_ARRAY_4x1 | SW1 |
Questions
How big is the SpikeLNA PCB?
It measures 49.5 × 36.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the SpikeLNA use?
25 parts, built around the OPA657U. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the SpikeLNA KiCad files?
From the cellularmitosis/SpikeLNA repository on GitHub, at the commit this page was made from: the board is SpikeLNA.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the SpikeLNA design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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