4 layers100 × 52 mm
2 layers40 × 54.2 mm
Software defined TDR based on an STM32G474, MCU+USB interface work and are tested, TDR AFE is untested. Firmware needs to be updated.
- Size
- 40 × 54.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 76
- Nets
- 74
- Pads
- 294
- Tracks, vias
- 842, 174
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 27 Sep 2020
- Updated
- 13 Feb 2021
Overview
Tdr is an open-source printed circuit board by Jana-Marie, from the Jana-Marie/Mini-TDR repository on GitHub. It is a 2-layer board of 40 × 54.2 mm with 76 parts on 74 nets, routed with 842 tracks and 174 vias.
It is built around the STM32G474CBT6, AD8009AR and CJ432. Its parts include 33 resistors, 17 capacitors, 10 ICs, 10 connectors and 2 diodes. It belongs with the STM32 boards of this library.
Main components
3
STM32G474CBT6
LQFP-48_7x7-40℃~+85℃ 1.71V~3.6V 128KB 128KB 12bit 12bit 170MHz 32 Bit 38 ARM Cortex-M4F Built-in FLASH LQFP-48(7x7) Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
AD8009AR
SOIC81GHz, 5,500 V/us Low Distortion AmplifierAnalog DevicesUncategorised
CJ432
SOT-230℃~+70℃ 1.2214V~1.2586V 100mA Adjustable Parallel ±1.5% SOT-23 Voltage Reference ROHSWEIDAVoltage Reference
README
README.mdMini-TDR
Software defined TDR based on an STM32G474, MCU+USB interface work and are tested, TDR AFE is untested. Firmware needs to be updated.
Parts
76| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 22 | otter:R_0402 | R11, R19, R20, R21, R22, R30, R35, R36 |
| 6 | 100n | otter:C_0402 | C4, C7, C8, C9, C16, C17 |
| 6 | 1u | otter:C_0603 | C3, C5, C6, C11, C12, C15 |
| 6 | 68 | otter:R_0402 | R2, R3, R4, R10, R29, R31 |
| 6 | SMA | Connector_Coaxial:SMA_Amphenol_132291_Vertical | J2, J3, J4, J5, J6, J7 |
| 5 | USBLC | Package_TO_SOT_SMD:SOT-23-6 | U2, U5, U6, U7, U9 |
| 4 | 10k | otter:R_0402 | R1, R12, R23, R25 |
| 4 | 1k | otter:R_0402 | R13, R15, R17, R18 |
| 3 | 100k | otter:R_0402 | R24, R33, R34 |
| 2 | 0 | otter:R_0402 | R16, R27 |
| 2 | 18p | otter:C_0402 | C1, C2 |
| 2 | 5k1 | otter:R_0402 | R8, R9 |
| 2 | DNP | otter:R_0402 | R14, R26 |
| 1 | 10n | otter:C_0402 | C10 |
| 1 | 2p2 | otter:C_0402 | C14 |
| 1 | 47 | otter:R_0402 | R28 |
| 1 | 4p7 | otter:C_0402 | C13 |
| 1 | 5V1 | Diode_SMD:D_SOD-123F | D3 |
| 1 | 8Mhz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | AD8009 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U10 |
| 1 | AP2204R-3.3 | Package_TO_SOT_SMD:SOT-89-3 | U1 |
| 1 | CJ432 | Package_TO_SOT_SMD:SOT-23 | U4 |
| 1 | DFU | Button_Switch_SMD:SW_SPST_PTS810 | SW1 |
| 1 | EXT | Connector_JST:JST_PH_B5B-PH-K_1x05_P2.00mm_Vertical | J8 |
| 1 | JP1 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | JP1 |
| 1 | JP2 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | JP2 |
| 1 | LED_RGBA | LED_SMD:LED_Avago_PLCC4_3.2x2.8mm_CW | D1 |
| 1 | LT1711xMS8 | Package_SO:MSOP-8_3x3mm_P0.65mm | U8 |
| 1 | ROUT | otter:R_0805 | R32 |
| 1 | SMA | Connector_Coaxial:SMA_Amphenol_132289_EdgeMount | J9 |
| 1 | STM32G474CBT6 | Package_QFP:TQFP-48_7x7mm_P0.5mm | U3 |
| 1 | TC2030 | otter:TC2030 | P1 |
| 1 | USB | otter:USB-C 16Pin | J1 |
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Questions
How big is the Tdr PCB?
It measures 40 × 54.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Tdr use?
76 parts, built around the STM32G474CBT6, AD8009AR and CJ432. 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 Tdr KiCad files?
From the Jana-Marie/Mini-TDR repository on GitHub, at the commit this page was made from: the board is tdr.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Tdr design in my own project?
Its repository states no licence, so its author keeps all rights: ask Jana-Marie before reusing the design.