2 layers122 × 122.3 mm
Trigger board
BUNPC/NN22-Technical-Documents
Repository for the storage and dissemination of NN22 technical documents
70 parts10
4 layers34.5 × 34.5 mm
Readout splitter
BUNPC/NN22-Technical-Documents10Repository for the storage and dissemination of NN22 technical documents
- Size
- 34.5 × 34.5 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 86
- Nets
- 46
- Pads
- 281
- Tracks, vias
- 649, 114
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 12 Feb 2024
- Updated
- 18 Feb 2025
Overview
Readout splitter is an open-source printed circuit board by BUNPC, from the BUNPC/NN22-Technical-Documents repository on GitHub. It is a 4-layer board of 34.5 × 34.5 mm with 86 parts on 46 nets, routed with 649 tracks and 114 vias.
It is built around the ADP7142WAUJZ-5.0-R7 and ADP7182AUJZ-R7. Its parts include 40 capacitors, 24 resistors, 16 ICs and 5 connectors.
Main components
2
ADP7142WAUJZ-5.0-R7
TSOT-23-5-40℃~+125℃@(Tj) 1 11uVrms 200mA 200mV@(200mA) 40V 50uA 5V 88dB@(10kHz) Fixed Positive Soft Start、Enable TSOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAnalog DevicesVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsADP7182AUJZ-R7
TSOT-23-5-40℃~+125℃@(Tj) 1 1.22V~27V 185mV@(200mA) 18uVrms 200mA 28V 650uA 66dB@(10kHz) Adjustable Negative Over Current Protection、Over Temperature Protection、Enable TSOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAnalog DevicesVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
Hardware Main/Electronics/Detector Electronics/DET_Splitter/README.mdreadout-splitter
This is a splitter board designed to be plug-compatible with the TIGRIS one. See top-level README for some more details.
Connector from readout system is a Samtec SHF-117-01-L-D-SM shrouded 34-pin header with 0.05" pitch.
Detector connector is Samtec SFMC-118-02-S-D 36-pin socket strip with 0.05" pitch. Note that the TIGRIS schematic and layout use mirrored pinout for the detector connector (odd-even swap).
Designed LDOs:
- Negative: ADP7182ACPZN-R7
- Positive: ADP7142ACPZN5.0-R7
The negative adjustable regulator should output -15.0V with the resistors shown. There is an additional filter in the design (R+C on front side) which can (according to the datasheet) reduce the noise a bit in the negative regulator. There is no such provision for the positive regulator.
This is a 4-layer board and a bit dense. There were a few compromises made in routing with shared vias, etc but hopefully it will be OK.
Parts
86| Qty | Value | Footprint | References |
|---|---|---|---|
| 32 | 4.7uF 25V | Capacitor_SMD:C_0603_1608Metric | C1, C2, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23 +16 |
| 8 | 11k | Resistor_SMD:R_0603_1608Metric | R1, R3, R5, R7, R9, R11, R13, R15 |
| 8 | 150k | Resistor_SMD:R_0603_1608Metric | R2, R4, R6, R8, R10, R12, R14, R16 |
| 8 | ADP7142WAUJZ-5.0 | Package_TO_SOT_SMD:TSOT-23-5 | U17, U18, U19, U20, U21, U22, U23, U24 |
| 8 | ADP7182AUJZ | Package_TO_SOT_SMD:TSOT-23-5 | U1, U2, U3, U4, U5, U6, U7, U8 |
| 8 | DNP | Resistor_SMD:R_0603_1608Metric | R17, R18, R19, R20, R21, R22, R23, R24 |
| 8 | DNP | Capacitor_SMD:C_0603_1608Metric | C33, C34, C35, C36, C37, C38, C39, C40 |
| 3 | Conn_01x01_Pin | TestPoint:TestPoint_THTPad_1.0x1.0mm_Drill0.5mm | J1, J2, J3 |
| 1 | Conn_02x17_Odd_Even | samtec:SHF-117-01-X-D-SM | J4 |
| 1 | Conn_02x18_Odd_Even | samtec:SAMTEC_SFMC-118-02-L-D | J5 |
| 1 | Housing | AA_Hammond:1551QGY | N1 |
Questions
How big is the Readout splitter PCB?
It measures 34.5 × 34.5 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Readout splitter use?
86 parts, built around the ADP7142WAUJZ-5.0-R7 and ADP7182AUJZ-R7. 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 Readout splitter KiCad files?
From the BUNPC/NN22-Technical-Documents repository on GitHub, at the commit this page was made from: the board is Hardware Main/Electronics/Detector Electronics/DET_Splitter/readout-splitter.kicad_pcb and its schematic Hardware Main/Electronics/Detector Electronics/DET_Optode/flex-VEMD/flex-VEMD.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Readout splitter design in my own project?
Its repository states no licence, so its author keeps all rights: ask BUNPC before reusing the design.
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