4 layers84.3 × 50.8 mm
PrecisionTimer RevG-1
SepticElectronics/High-Speed-Timer
High Speed Precision Timer 55ps/4ns
128 partsGPL-3.0
4 layers84.3 × 50.8 mm
PrecisionTimer RevG
SepticElectronics/High-Speed-TimerHigh Speed Precision Timer 55ps/4ns
- Size
- 84.3 × 50.8 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 125
- Nets
- 156
- Pads
- 481
- Tracks, vias
- 996, 348
- Pours
- 45
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 25 Jul 2020
- Updated
- 29 Sep 2020
Overview
PrecisionTimer RevG is an open-source printed circuit board by SepticElectronics, from the SepticElectronics/High-Speed-Timer repository on GitHub, published under the GPL-3.0 licence. It is a 4-layer board of 84.3 × 50.8 mm with 125 parts on 156 nets, routed with 996 tracks and 348 vias.
It is built around the LCMXO2-256HC-6SG32C, MIC23050-SYML-TR and CP2102N-A02-GQFN20R, with the TS30012-M050QFNR, AP21410FM and LM74610QDGKTQ1 among its other parts. Its parts include 39 capacitors, 18 resistors, 10 ICs, 9 connectors and 6 diodes. It belongs with the fPGA and programmable logic boards and the SAM D and SAM and FPGA and CPLD boards of this library.
Main components
7
LCMXO2-256HC-6SG32C
QFN-32-EP(5x5)0℃~+85℃ 2.375V~3.465V 21 256 32 MachXO2 Supports hot swap、Supports watchdog timeout detection QFN-32-EP(5x5) Programmable Logic Device (CPLDs/FPGAs) ROHSLatticeProgrammable Logic Device (CPLDs/FPGAs)
MIC23050-SYML-TR
TDFN-8-EP(2x2)-40℃~+125℃@(TJ) 1 2.7V~5.5V 20uA 3.3V 4MHz 600mA Buck Built-in Fixed Light load efficient mode Step-down type Yes TDFN-8-EP(2x2) DC-DC Converters ROHSMicrochip TechnologyDC-DC Converters
CP2102N-A02-GQFN20R
QFN-20-EP(3x3)-40℃~+85℃ 1.3uA 13.7mA 3Mbps 3V~3.6V、3V~5.25V USB 2.0 USB to UART QFN-20-EP(3x3) USB Converters ROHSSilicon LabsUSB Converters
TS30012-M050QFNR
QFN-16-EP(3x3)-40℃~+125℃@(TJ) 1 1MHz 2A 3.3mA 4.5V~24V 5V Buck Built-in Fixed Overcurrent Protection、Light load efficient mode、Operating status indication、Cycle-by-cycle current limiting Step-down type Yes QFN-16-EP(3x3) DC-DC Converters ROHSSEMTECHDC-DC Converters
AP21410FM
DFN2018-6-EP-40℃~+85℃ 1 2.7V~5.5V 200mA 95mΩ Active Low High Side Switch Soft-start、Under-voltage lockout、Overcurrent Protection、Over temperature protection、Short-Circuit Protection、Reverse current blocking DFN2018-6-EP Power Distribution Switches ROHSDiodes IncorporatedPower Distribution Switches
LM74610QDGKTQ1
VSSOP-8-0.65mmVSSOP-8-0.65mm ORing Controllers ROHSTexas InstrumentsAC-DC Controllers And Regulators
TDC7200PW
TSSOP-14-40℃~+85℃ 0.5uA 20MHz 2V~3.6V SPI TSSOP-14 ADCs/DACs - Special Purpose ROHSTexas InstrumentsADCs/DACs - Special Purpose
README
README.mdHigh Speed Precision Timer SEHSPT554
A simple digital timer based on the TDC7200 for high-precision, short burst time measurement with a resolution of up to 55 ps. Long interval, low precision time measurement is done using a 125 MHz oscillator and a DDR-type clocked synchronous counter, implemented in a MachXO2 FPGA with a theoretical resolution of 4 ns. The data collection and interfacing is handled by an ATSAM4S Microcontroller. Two USB 2.0 and a MicroSD Interface are available for data collection.
If connected to a PC via USB-B the device is fully USB-Bus-powered. In the case of only using a microSD-Card or a USB thumb drive, the device must be powered from a 6-24 V Barrel Connector (5.5 x 2.1 mm or 5.5 x 2.5 mm, Center Positive).
A MIPI10 JTAG programming header is available and can be used for reprogramming the FPGA or for a boundary scan of both the FPGA and the MCU. A 4-Pin (2.54 mm) UART connector is provided for reprogramming the MCU. Three SMA connectors are used with 3.3 V LVCMOS signal-level for triggering and resetting the measurements.
The PCB is designed to fit inside the Thorlabs EEB3311 housing.
This project started out as a Product Design / Layout challenge for myself and is still in a very early WIP-stage. Any (constructive) input is very much appreciated. Please note that all of the mentioned features are purely implemented on a PCB / Schematic level. No software, except for the FPGA configuration, has been written yet.
Parts
125| Qty | Value | Footprint | References |
|---|---|---|---|
| 18 | 100n | Capacitor_SMD:C_0603_1608Metric | C3, C10, C16, C18, C19, C20, C21, C22, C23, C24, C25, C26, C27, C35, C36, C37 +2 |
| 12 | TestPoint_Alt | TestPoint:TestPoint_Pad_D1.0mm | TP2, TP4, TP7, TP8, TP9, TP10, TP11, TP16, TP17, TP18, TP19, TP20 |
| 9 | 4µ7 | Capacitor_SMD:C_0603_1608Metric | C6, C7, C9, C12, C17, C29, C31, C33, C34 |
| 8 | TestPoint_Alt | Selfmade Stuff:TestPoint_Pad_D0.7mm | TP1, TP3, TP5, TP6, TP12, TP13, TP14, TP15 |
| 5 | 10k | Resistor_SMD:R_0603_1608Metric | R5, R6, R7, R8, R14 |
| 5 | Ferrite_Bead_Small | Inductor_SMD:L_0603_1608Metric | FB1, FB2, FB3, FB4, FB5 |
| 4 | 10p | Capacitor_SMD:C_0402_1005Metric | C1, C2, C4, C5 |
| 4 | 22µ | Capacitor_SMD:C_0805_2012Metric | C13, C14, C15, C32 |
| 3 | 0R | Resistor_SMD:R_0603_1608Metric | R9, R10, R13 |
| 3 | 1k | Resistor_SMD:R_0402_1005Metric | R16, R17, R18 |
| 3 | Conn_Coaxial | Connector_Coaxial:SMA_Molex_73251-2200_Horizontal | J5, J7, J8 |
| 2 | 1µH | Inductor_SMD:L_0805_2012Metric | L1, L3 |
| 2 | 4.7µH | Inductor_SMD:L_0805_2012Metric | L2, L4 |
| 2 | 47k | Resistor_SMD:R_0402_1005Metric | R2, R3 |
| 2 | 560p | Capacitor_SMD:C_0603_1608Metric | C11, C28 |
| 2 | AP21410 | Package_DFN_QFN:DFN-6-1EP_2x1.8mm_P0.5mm_EP1.2x1.6mm | U7, U10 |
| 2 | MIC23050-SYML-TR | SamacSys_Parts:SON50P200X200X90-9N | U6, U9 |
| 2 | Polyfuse_Small | Fuse:Fuse_1206_3216Metric_Castellated | F1, F2 |
| 2 | Red | LED_SMD:LED_0402_1005Metric | D5, D6 |
| 1 | 100k | Resistor_SMD:R_0603_1608Metric | R15 |
| 1 | 100p | Capacitor_SMD:C_0603_1608Metric | C38 |
| 1 | 100µ | Capacitor_SMD:C_1206_3216Metric | C30 |
| 1 | 1k | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 22R | Resistor_SMD:R_0603_1608Metric | R11 |
| 1 | 22k | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | 68R | Resistor_SMD:R_0603_1608Metric | R12 |
| 1 | ASE-016MHz | Oscillator:Oscillator_SMD_EuroQuartz_XO32-4Pin_3.2x2.5mm | X4 |
| 1 | ASE-125MHz | Oscillator:Oscillator_SMD_SeikoEpson_SG210-4Pin_2.5x2.0mm | X2 |
| 1 | ATSAM4SD32 | Package_BGA:TFBGA-100_9.0x9.0mm_Layout10x10_P0.8mm | U4 |
| 1 | Barrel_Jack_Switch | Connector_BarrelJack:BarrelJack_Wuerth_6941xx301002 | J4 |
| 1 | CP2102N-A02-GQFN20R | Selfmade Stuff:CP2102NA02GQFN20 | U3 |
| 1 | Conn_01x04_Male | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical_SMD_Pin1Left | J9 |
| 1 | Conn_02x05_Odd_Even | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Vertical_SMD | J6 |
| 1 | Crystal | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | X3 |
| 1 | Crystal_16MHz | Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm | X1 |
| 1 | D1213A-02SO-7 | Selfmade Stuff:SOT-26 | D4 |
| 1 | D_TVS | Diode_SMD:D_SMB | D2 |
| 1 | D_Zener_Small | Diode_SMD:D_MiniMELF | D3 |
| 1 | LCMXO2-256HC-6SG32C | SamacSys_Parts:QFN50P500X500X60-33N | U2 |
| 1 | LED | LED_THT:LED_D3.0mm | D1 |
| 1 | LM74610QDGKTQ1 | SamacSys_Parts:SOP65P490X110-8N | U8 |
| 1 | LOGO | Selfmade Stuff:CreativeCommons_CC_6mm | G*** |
| 1 | Micro_SD_Card | Selfmade Stuff:475710001 | J2 |
| 1 | Q_NMOS_GSD | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | TDC7200PW | SamacSys_Parts:SOP65P640X120-14N | U1 |
| 1 | TS30012-M050QFNR | SamacSys_Parts:QFN50P300X300X100-17N-D | U5 |
| 1 | USB_A | Connector_USB:USB_A_Molex_67643_Horizontal | J3 |
| 1 | USB_B | SamacSys_Parts:KUSBEXSMTBS1NBTR | J1 |
The 119 most common of 125 parts.
Questions
How big is the PrecisionTimer RevG PCB?
It measures 84.3 × 50.8 mm and has 4 copper layers, 1.6 mm thick.
What parts does the PrecisionTimer RevG use?
125 parts, built around the LCMXO2-256HC-6SG32C, MIC23050-SYML-TR, CP2102N-A02-GQFN20R and TS30012-M050QFNR. 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 PrecisionTimer RevG KiCad files?
From the SepticElectronics/High-Speed-Timer repository on GitHub, at the commit this page was made from: the board is PrecisionTimer_RevG/PCB Design Files/PrecisionTimer_RevG.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the PrecisionTimer RevG 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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