1" Photodetector - SOT23

aewallin·One-Inch-Photodetector·SOT23/circulaire.kicad_pcb

1" Photodetector - SOT23 PCB layout, top view — open source board by aewallin

About the 1" Photodetector - SOT23 PCB

1" Photodetector - SOT23 is an open source PCB design by aewallin, published on GitHub. It is a 2-layer board measuring 25 × 25 mm, with 30 components from 18 distinct parts.

Other key parts include the LT3042xMSE, LT3093xMSE and OPA847xDBV. By type, the board carries 13 capacitors, 5 resistors, 3 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.

1" Photodetector - SOT23, from the project README — From the project README

Main components on the 1" Photodetector - SOT23

LT3042xMSE LT3093xMSEOPA847xDBV

1" Photodetector - SOT23 bill of materials (BOM)

30 components, 18 distinct parts.

Qty	Part	Footprint	Refs
1	LT3042xMSE	MSOP-10-1EP_3x3mm_P0.5mm_EP1.68x1.88mm	U101
1	LT3093xMSE	MSOP-12-1EP_3x4mm_P0.65mm_EP1.65x2.85mm	U102
1	OPA847xDBV	SOT-23-6	U103
1	Conn_Coaxial	MMCX_Molex_73415-1471_Vertical	J101
1	Conn_01x03	PinHeader_1x03_P2.54mm_Vertical	J102
1	R	R_0603_1608Metric	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
3	C	C_0603_1608Metric	C105, C106, C115
2	100n	C_0603_1608Metric	C108, C109
2	49k9	R_0603_1608Metric	R101, R107
1	300R	R_0603_1608Metric	R102
1	R	R_0603_1608Metric	R104
1	49R9	R_0603_1608Metric	R106

1" Photodetector - SOT23 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.

LayoutSOT23/circulaire.kicad_pcb
SchematicSOT23/circulaire.kicad_sch

1" Photodetector - SOT23: common questions

How big is the 1" Photodetector - SOT23 PCB?

The 1" Photodetector - SOT23 measures 25 × 25 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the 1" Photodetector - SOT23?

30 components, from 18 distinct parts. The full bill of materials is listed on this page.

Where can I download the 1" Photodetector - SOT23 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 1" Photodetector - SOT23 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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