2 layers70.6 × 50.3 mm
USTSIPIN03
ust-modules/USTSIPIN03
Semiconductor based ionizing radiation dosimeter and spectrometer.
100 partsGPL-3.0
2 layers70.6 × 40.1 mm
PCRD08
mlab-modules/PCRD08PCB module PCRD08
- Size
- 70.6 × 40.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 65
- Nets
- 40
- Pads
- 220
- Tracks, vias
- 431, 58
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 12 Aug 2026
- Updated
- 23 Aug 2026
Overview
PCRD08 is an open-source printed circuit board by mlab-modules, from the mlab-modules/PCRD08 repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 70.6 × 40.1 mm with 65 parts on 40 nets, routed with 431 tracks and 58 vias.
It is built around the ISL21080CIH341Z-TK, ISL21080DIH309Z-TK and MIC5504-3.3YM5-TR, with the SN74LVC2G74DCU and TS3021ILT among its other parts. Its parts include 31 capacitors, 11 resistors, 10 ICs, 4 connectors and 2 inductors.
Main components
5
ISL21080CIH341Z-TK
SOT-23-3-40℃~+85℃@(Ta) 1.5uA 30uVp-p 4.096V 4.5V~8V 50ppm/℃ 52uVrms 7mA Fixed Series ±0.2% SOT-23-3 Voltage Reference ROHSRenesas ElectronicsVoltage Reference
ISL21080DIH309Z-TK
SOT-23-40℃~+85℃@(Ta) 1.5uA 10uVrms 2V~5.5V 50ppm/℃ 7mA 900mV Fixed Series ±0.7% SOT-23 Voltage Reference ROHSRenesas ElectronicsVoltage Reference
MIC5504-3.3YM5-TR
SOT-23-5-40℃~+125℃@(Tj) 1 160mV@(300mA) 175uVrms 3.3V 300mA 38uA 5.5V 60dB@(1kHz) Fixed Over Current Protection Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMicrochip TechnologyVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SN74LVC2G74DCU
VSSOP-8-0.5mm-40℃~+125℃ 1 1 1.1ns 1.65V~5.5V 10uA 200MHz 32mA 32mA 4.4ns@5V,50pF 500ps 5pF 74LVC Series Asynchronous Complementary D-Type Rising Edge Set and Reset VSSOP-8 Flip Flops ROHSTexas InstrumentsFlip FlopsTS3021ILT
SOT-23-5-40℃~+125℃ 1 1.8V~5V 105ns 160nA 6mV 79dB 90uA CMOS Rail-to-Rail Input SOT-23-5 Comparators ROHSSTMicroelectronicsComparators
README
README.mdPCRD08 - Analogue backend for SiPM detectors with scintillation crystals
Analogue front-end and ADC module for radiation detectors based on silicon photomultipliers (SiPM) coupled to scintillation crystals. The module amplifies the SiPM pulses, detects a threshold crossing, and digitizes the signal for a controlling MCU over SPI.
Principle of function
The detector signal enters through the MCX connector J201 and is AC-coupled into a non-inverting amplifier (U201, AD8691). A second AD8691 stage (U204) provides additional gain before the signal reaches the LTC1865-MS ADC (U207), which is read out over SPI. A comparator (U203, TS3021ILT) together with a D flip-flop (U205, SN74LVC2G74) latches a digital flag whenever the signal crosses a threshold, which the controlling MCU can use to time the ADC conversion (CONV/RST/SCK/SDI/SDO are supplied by the host over the module's socket interface).
Difference from PCRD07
PCRD08 reuses the general architecture of the older PCRD07 analogue backend (dual AD8691 gain stages, TS3021ILT comparator, LTC1865-MS ADC), but the analogue signal processing was reworked for SiPM+scintillator pulses, which are positive-going:
- Input polarity - PCRD07 (both revision A and B) amplifies the input signal with an inverting first stage (signal fed into the op-amp's
-input, gain set by the feedback/input resistor ratio). PCRD08's input stage (U201) instead feeds the signal into the op-amp's+input, giving a non-inverting, unity-gain-at-high-frequency response suited to positive pulses. - No analogue sample-and-hold switch - PCRD07 uses an analogue switch (TS5A4594) driven by its comparator/flip-flop pair to freeze the peak voltage on a storage capacitor, i.e. a true analogue peak-detector/memory circuit. PCRD08 has no such switch or hold capacitor; its comparator/flip-flop pair (U203/U205) only produces a digital threshold-crossing flag, and the ADC conversion is triggered directly by the host rather than sampling a held analogue voltage.
(Verified by comparing hw/sch_pcb/analogue_backend.kicad_sch of both modules.)
Parts
65| Qty | Value | Footprint | References |
|---|---|---|---|
| 17 | 100nF | Capacitor_SMD:C_0805_2012Metric | C201, C202, C204, C208, C209, C210, C212, C215, C216, C219, C221, C301, C302, C303, C305, C308 +1 |
| 6 | 10uF | Capacitor_Tantalum_SMD:CP_EIA-3216-18_Kemet-A | C203, C205, C206, C207, C217, C220 |
| 5 | 100 | Resistor_SMD:R_0805_2012Metric | R201, R203, R204, R205, R206 |
| 4 | 1nF | Capacitor_SMD:C_0805_2012Metric | C211, C213, C214, C218 |
| 3 | , , | ||
| 3 | 10uF | Capacitor_SMD:C_0805_2012Metric | C306, C307, C309 |
| 2 | 10 | Resistor_SMD:R_0805_2012Metric | R202, R211 |
| 2 | 1k | Resistor_SMD:R_0805_2012Metric | R207, R208 |
| 2 | AD8691 | Package_TO_SOT_SMD:TSOT-23-5 | U201, U204 |
| 1 | 10k | Resistor_SMD:R_0805_2012Metric | R210 |
| 1 | 1uF | Mlab_L:FIR_0805 | C304 |
| 1 | 470R | Resistor_SMD:R_0805_2012Metric | R209 |
| 1 | Fiducial | Fiducial:Fiducial_1mm_Mask2mm | FID104 |
| 1 | HEADER_2x01 | Mlab_Pin_Headers:Straight_2x01 | J202 |
| 1 | HEADER_2x03 | Mlab_Pin_Headers:Straight_2x03 | J301 |
| 1 | HEADER_2x08 | Mlab_Pin_Headers:Straight_2x08 | J302 |
| 1 | HOLE | Mlab_Mechanical:MountingHole_3mm | M103 |
| 1 | ISL21080CIH341Z-TK | Package_TO_SOT_SMD:SOT-23 | U206 |
| 1 | ISL21080DIH309 | Package_TO_SOT_SMD:SOT-23 | U202 |
| 1 | Jumper_2_Bridged | NetTie:NetTie-2_SMD_Pad0.5mm | JP201 |
| 1 | L | Inductor_SMD:L_0805_2012Metric | L201 |
| 1 | LTC1865-MS | Package_SO:MSOP-10_3x3mm_P0.5mm | U207 |
| 1 | MCX | Connector_Coaxial:SMA_Amphenol_901-144_Vertical | J201 |
| 1 | MIC5504-3.3YM5-TR | Package_TO_SOT_SMD:SOT-23-5 | U303 |
| 1 | NL03KT330 | Inductor_SMD:L_0603_1608Metric_Pad1.05x0.95mm_HandSolder | L301 |
| 1 | RFShield_TwoPieces | RF_Shielding:Laird_Technologies_BMI-S-210-F_44.00x30.50mm | M201 |
| 1 | SN74LVC1G125DCKT | SN74LVC1G125DCKT:SOT65P210X110-5N | U302 |
| 1 | SN74LVC2G74 | Package_SO:VSSOP-8_2.3x2mm_P0.5mm | U205 |
| 1 | TS3021ILT | Package_TO_SOT_SMD:SOT-23-5 | U203 |
| 1 | TXU0304PWR | TXU0304PWR:SOP65P640X120-14N | U301 |
Questions
How big is the PCRD08 PCB?
It measures 70.6 × 40.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the PCRD08 use?
65 parts, built around the ISL21080CIH341Z-TK, ISL21080DIH309Z-TK, MIC5504-3.3YM5-TR and SN74LVC2G74DCU. 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 PCRD08 KiCad files?
From the mlab-modules/PCRD08 repository on GitHub, at the commit this page was made from: the board is hw/sch_pcb/PCRD08.kicad_pcb and its schematic hw/sch_pcb/PCRD08.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the PCRD08 design in my own project?
Its repository publishes it under the GPL-3.0 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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