

FETProbe V2
1.3 GHz FET Probe with low input capacitance
- Size
- 23 × 15 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 21
- Nets
- 11
- Pads
- 61
- Tracks, vias
- 36, 54
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 24 Sep 2024
- Updated
- 24 Sep 2024
Overview
FETProbe V2 is an open-source printed circuit board by makerprobe, from the makerprobe/FETProbe_V2 repository on GitHub, published under the MIT licence. It is a 2-layer board of 23 × 15 mm with 21 parts on 11 nets, routed with 36 tracks and 54 vias.
It is built around the SPX3819M5-L/TR, RF15N2R2B500CT and CONMHF1-SMD-G-T, with the GRM3195C1H104GA05D, T55A107M6R3C0045 and LQW15AN10NG80D among its other parts. Its parts include 7 capacitors, 6 resistors, 2 connectors, 1 IC and 1 diode.
Main components
9SPX3819M5-L/TR
SOT-23-5-40℃~+125℃@(Tj) 1 1.235V~15.3V 16V 300uVrms 500mA 700mV@(500mA) 70dB 90uA Adjustable Over Current Protection、Over Temperature Protection、Enable Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMaxLinearVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsRF15N2R2B500CT
04022.2pF 50V NP0 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSWalsin TechnologyMultilayer Ceramic Capacitors MLCC - SMD/SMTCONMHF1-SMD-G-T
SMD-40℃~+90℃ 1 50Ω 60V 6GHz Board Side Male Pin SMD Coaxial Connectors (RF) ROHSTE ConnectivityCoaxial Connectors (RF)GRM3195C1H104GA05D
1206100nF 50V C0G ±2% 1206 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSMurataMultilayer Ceramic Capacitors MLCC - SMD/SMTT55A107M6R3C0045
CASE-A-3216-18(mm)-55℃~+105℃ 100uF 45mΩ@100kHz 6.3V ±20% CASE-A-3216-18(mm) Tantalum Capacitors ROHSVishay IntertechnologyTantalum CapacitorsLQW15AN10NG80D
04021.4A 10nH 81mΩ Unshielded Inductor ±2% 0402 Power Inductors ROHSMurataPower InductorsRC0402FR-071ML
UncategorisedUnknown makerBF 998 E6327
PG-SOT-143-4PG-SOT-143-4 Pre-ordered transistors ROHSInfineon TechnologiesPre-Ordered TransistorsNSR0520V2T1G-CN
SOD-523SOD-523 Schottky Diodes ROHSChipNoboSchottky Diodes
README
README.mdFETProbe_V2
1.3 GHz FET Probe with low input capacitance
Parts
21| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 2.2pF | FETProbe:C_0402_1005Metric_mod | C6, C7 |
| 2 | u.Fl | Connector_Coaxial:U.FL_Molex_MCRF_73412-0110_Vertical | J1, J5 |
| 1 | 100nF | Capacitor_SMD:C_1206_3216Metric | C5 |
| 1 | 100uF | Capacitor_Tantalum_SMD:CP_EIA-3216-18_Kemet-A | C8 |
| 1 | 10nH | Inductor_SMD:L_0402_1005Metric | L1 |
| 1 | 10uF | Capacitor_SMD:C_0402_1005Metric | C1 |
| 1 | 10uF | Capacitor_SMD:C_0603_1608Metric | C2 |
| 1 | 12k | Resistor_SMD:R_0402_1005Metric | R6 |
| 1 | 1M | Resistor_SMD:R_0402_1005Metric | R3 |
| 1 | 27k | Resistor_SMD:R_0402_1005Metric | R5 |
| 1 | 47R | Resistor_SMD:R_0402_1005Metric | R4 |
| 1 | 4k7 | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | 5k6 | Resistor_SMD:R_0402_1005Metric | R2 |
| 1 | BF998 | FETProbe:SOT-143_mod | Q1 |
| 1 | C | FETProbe:input_cap | C4 |
| 1 | Laird_BMI-S-101 | RF_Shielding:Laird_Technologies_BMI-S-101_13.66x12.70mm | N1 |
| 1 | NSR0520V2T1G | Diode_SMD:D_SOD-523 | D2 |
| 1 | SPX3819M5-L | Package_TO_SOT_SMD:SOT-23-5 | U1 |
| 1 | TestPoint | TestPoint:TestPoint_THTPad_D2.0mm_Drill1.0mm | TP3 |
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Questions
How big is the FETProbe V2 PCB?
It measures 23 × 15 mm and has 2 copper layers, 1.6 mm thick.
What parts does the FETProbe V2 use?
21 parts, built around the SPX3819M5-L/TR, RF15N2R2B500CT, CONMHF1-SMD-G-T and GRM3195C1H104GA05D. 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 FETProbe V2 KiCad files?
From the makerprobe/FETProbe_V2 repository on GitHub, at the commit this page was made from: the board is FETProbe_v2.kicad_pcb and its schematic FETProbe_v2.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the FETProbe V2 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).