Opentrig

Dawson-HEP·opentrig·hardware/digital.kicad_pcb

About the Opentrig PCB

Opentrig is an open source RP2040/RP2350 PCB design by Dawson-HEP, published on GitHub under the EPL-2.0 license. It is a 4-layer board measuring 162.2 × 100 mm, with 408 components from 53 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the ICE40HX4K-TQ144, 74HC244, W25Q32JVZP, TPS54302 and TPS7A4701. By type, the board carries 135 resistors, 116 capacitors, 45 connectors, 38 ICs, 37 diodes and 27 test points.

From the project

Open-source acquisition trigger

An open-source, integrated, particle physics data acquisition system (DAQ).

Designed to interface with timing systems controlled by the AIDA-2020 TLU. Up to 24 digital trigger channels with variable-gain threshold setting.

- 144 MHz internal FPGA clock, and timing resolution - 24 digital trigger channels with variable gain - Input voltage range 3.3V-5V - TTL level compatible clock, trigger, input and output - AIDA-2020 TLU synchronous AIDA mode (page 31) compatible FPGA

Opentrig, from the project README — From the project README

Main components on the Opentrig

ICE40HX4K-TQ144 74HC244 W25Q32JVZP RP2040 TPS54302 TPS7A4701 CH224K REF5030ID MCP4728 REF5050ID TXB0108PW TLV3502AIDR

Opentrig bill of materials (BOM)

408 components, 53 distinct parts.

Qty	Part	Footprint	Refs
1	ICE40HX4K-TQ144	TQFP-144_20x20mm_P0.5mm	U1
4	74HC244	TSSOP-20_4.4x6.5mm_P0.65mm	U2, U11, U12, U13
1	W25Q32JVZP	WSON-8-1EP_6x5mm_P1.27mm_EP3.4x4.3mm	U3
1	RP2040	QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm	U4
3	TPS54302	SOT-23-6	U5, U8, U9
2	TPS7A4701	Texas_RGW0020A_VQFN-20-1EP_5x5mm_P0.65mm_EP3.15x3.15mm_ThermalVias	U6, U7
1	CH224K	SSOP-10-1EP_3.9x4.9mm_P1mm_EP2.1x3.3mm	U10
2	REF5030ID	SOIC-8_3.9x4.9mm_P1.27mm	U14, U19
6	MCP4728	MSOP-10_3x3mm_P0.5mm	U15, U16, U18, U20, U21, U23
2	REF5050ID	SOIC-8_3.9x4.9mm_P1.27mm	U17, U22
3	TXB0108PW	TSSOP-20_4.4x6.5mm_P0.65mm	U24, U29, U34
12	TLV3502AIDR	SOIC-8_3.9x4.9mm_P1.27mm	U25, U26, U27, U28, U30, U31, U32, U33 +4
1	12 MHz ABM8-272-T3	Crystal_SMD_Abracon_ABM8AIG-4Pin_3.2x2.5mm	Y1
33	IPEX-1	BWIPX-1-001E	J1, J2, J3, J4, J5, J6, J7, J8 +25
4	Conn_01x03_Pin	PinHeader_1x03_P1.00mm_Vertical_SMD_Pin1Left	J10, J11, J13, J15
1	Conn_01x10_Pin	PinHeader_1x10_P1.00mm_Vertical_SMD_Pin1Left	J12
1	Conn_01x02_Pin	PinHeader_1x02_P1.00mm_Vertical_SMD_Pin1Left	J14
2	Micro_SD_Card_Det1	microSD_HC_MSD-4-A	J16, J18
1	Conn_01x03_Pin	PinHeader_1x03_P2.54mm_Vertical	J17
2	USB_C_Receptacle_USB2.0_16P	USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal	J19, J20

Show 33 more

Qty	Part	Footprint	Refs
1	Conn_01x24_Pin	PinHeader_1x24_P2.54mm_Vertical	J45
6	SW_DIP_x03	SW_DIP_SPSTx03_Slide_6.7x9.18mm_W8.61mm_P2.54mm_LowProfile	SW1, SW2, SW3, SW4, SW5, SW6
27	TestPoint_Alt	TestPoint_Keystone_5015_Micro_Mini	TP4, TP7, TP8, TP9, TP10, TP12, TP13, TP15 +19
35	LED	LED_0805_2012Metric	D1, D2, D3, D4, D5, D6, D8, D9 +27
1	1N4148WS	D_SOD-323	D7
1	ESDA25P35	D_1610_4027Metric	D10
3	10uH	L_Changjiang_FXL0630	L1, L2, L3
65	100n	C_0402_1005Metric	C1, C3, C4, C5, C6, C7, C8, C9 +57
5	4.7u	C_1206_3216Metric	C2, C16, C18, C20, C23
19	1u	C_0805_2012Metric	C10, C47, C48, C52, C53, C66, C67, C68 +11
2	1u 25V	C_0402_1005Metric	C33, C34
14	10u	C_1206_3216Metric	C35, C37, C42, C49, C50, C54, C60, C65 +6
2	15p	C_0402_1005Metric	C39, C40
1	100p	C_0402_1005Metric	C44
6	22u	C_0603_1608Metric	C45, C46, C57, C58, C63, C64
2	47p	C_0402_1005Metric	C56, C62
2	49.9R	R_0402_1005Metric	R1, R2
14	0R	R_0402_1005Metric	R3, R4, R5, R6, R7, R8, R9, R19 +6
33	470R	R_0402_1005Metric	R10, R11, R12, R13, R14, R15, R16, R18 +25
1	100R	R_0402_1005Metric	R17
13	10k	R_0402_1005Metric	R21, R28, R29, R30, R31, R32, R34, R35 +5
2	4.7k	R_0402_1005Metric	R22, R23
6	1k	R_0402_1005Metric	R24, R27, R37, R50, R52, R54
2	27R	R_0402_1005Metric	R25, R26
3	47k	R_0402_1005Metric	R38, R40, R49
2	100k	R_0603_1608Metric	R39, R43
2	33k	R_0402_1005Metric	R41, R45
2	100k	R_0402_1005Metric	R42, R46
2	22k	R_0402_1005Metric	R44, R53
1	220k	R_0603_1608Metric	R47
2	5.1k	R_0402_1005Metric	R59, R60
24	49.9R	R_0603_1608Metric	R89, R90, R96, R97, R101, R102, R103, R104 +16
24	10R	R_0402_1005Metric	R91, R92, R93, R94, R95, R98, R99, R100 +16

Opentrig design files

The KiCad project lives in the Dawson-HEP/opentrig repository on GitHub; these links point at the commit this page was built from.

Layouthardware/digital.kicad_pcb
Schematichardware/digital.kicad_sch

Opentrig: common questions

What microcontroller does the Opentrig use?

The Opentrig is built around the RP2040, from the RP2040/RP2350 family.

How big is the Opentrig PCB?

The Opentrig measures 162.2 × 100 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Opentrig?

408 components, from 53 distinct parts. The full bill of materials is listed on this page.

Where can I download the Opentrig design files?

From the Dawson-HEP/opentrig repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Opentrig design in my own project?

It is published under EPL-2.0, which limits how it may be reused; read the license before building on it.

Can I test firmware for the Opentrig without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.