BellssGit/FPGA-SDR-FM-RADIO25FPGA based FM radio with traditional IF architecture and digital IQ demodulation
R820T With LCMXO2 is an open-source printed circuit board by BellssGit, from the BellssGit/FPGA-SDR-FM-RADIO repository on GitHub, published under the Apache-2.0 licence. It is a 4-layer board of 51.1 × 73.1 mm with 119 parts on 168 nets, routed with 690 tracks and 129 vias.
It is built around the LCMXO2-2000HC-4TG100I, BGA2869 and SPX3819M5-L-3-3. Its parts include 65 capacitors, 20 resistors, 10 connectors, 9 ICs and 8 inductors. It belongs with the FPGA and CPLD boards of this library.
FPGA based FM radio with traditional IF architecture and digital IQ demodulation
credit: https://github.com/alberto-grl/1bitSDR
Note； the PCB project name "R820T_With_LCMXO2" has nothing with R820T frontend IC, it was a thing when I start this PCB, but removed after few revisions.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 31 | 100nF | Library:C_0603_1608Metric | C13, C15, C16, C17, C22, C23, C24, C25, C33, C34, C35, C36, C38, C39, C40, C41 +15 |
| 15 | 1uF | Library:C_0603_1608Metric | C4, C5, C6, C7, C8, C14, C19, C20, C21, C29, C30, C31, C32, C37, C65 |
| 8 | NAN | Library:C_0603_1608Metric | C1, C2, C10, C11, C12, C26, C27, C28 |
| 7 | 4.7K | Library:R_0603_1608Metric | R5, R6, R16, R17, R18, R19, R21 |
| 6 | C | Library:C_0603_1608Metric | C49, C56, C58, C59, C60, C63 |
| 5 | L | Library:L_0805_2012Metric | L1, L2, L3, L4, L8 |
| 4 | LED | Library:LED_0603_1608Metric | D1, D2, D3, D4 |
| 3 | 10pF | Library:C_0603_1608Metric | C52, C54, C57 |
| 3 | 50R | Library:R_0603_1608Metric | R13, R14, R15 |
| 3 | Conn_Coaxial_Small | Library:SMA_Samtec_SMA-J-P-H-ST-EM1_EdgeMount_FIX_edge | J2, J4, J6 |
| 3 | L | Library:L_0603_1608Metric | L5, L6, L7 |
| 3 | NAN | Library:R_0603_1608Metric | R10, R11, R12 |
| 3 | R | Library:R_0603_1608Metric | R7, R8, R9 |
| 3 | SG-210SDD | Library:Oscillator_SMD_Abracon_ASE-4Pin_3.2x2.5mm | X1, X2, X3 |
| 3 | SPX3819M5-L-3-3 | Library:SOT-23-5 | U6, U8, U9 |
| 2 | 10K | Library:R_0603_1608Metric | R3, R4 |
| 2 | 5.1K | Library:R_0603_1608Metric | R1, R2 |
| 2 | BGA2869 | Library:SOT-363_SC-70-6 | U2, U4 |
| 1 | 10uF | Library:C_0603_1608Metric | C18 |
| 1 | 22uF | Library:C_0805_2012Metric | C3 |
| 1 | ADF4350 | Library:LFCSP-32-1EP_5x5mm_P0.5mm_EP3.25x3.25mm | U7 |
| 1 | Conn_01x02_Pin | Library:PinHeader_1x02_P2.54mm_Vertical | J8 |
| 1 | Conn_01x03_Socket | Library:PinSocket_1x03_P2.54mm_Vertical | J9 |
| 1 | Conn_01x10_Socket | Library:PinSocket_1x10_P2.54mm_Vertical | J5 |
| 1 | Conn_02x03_Odd_Even | Library:PinHeader_2x03_P2.54mm_Vertical | J11 |
| 1 | Conn_02x15_Odd_Even | Library:PinSocket_2x15_P2.54mm_Vertical | J7 |
| 1 | JTAG | Library:PinSocket_1x05_P2.54mm_Vertical | J3 |
| 1 | LCMXO2-2000HC-4TG100I | Library:TQFP-100_14x14mm_P0.5mm | U1 |
| 1 | USBC | Library:USB_C_Receptacle_G-Switch_GT-USB-7010ASV | J1 |
| 1 | ~ | Library:SO-8_3.9x4.9mm_P1.27mm | U5 |
| 1 | ~ | Library:SSOP-28_5.3x10.2mm_P0.65mm | U3 |
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It measures 51.1 × 73.1 mm and has 4 copper layers, 1.6 mm thick.
119 parts, built around the LCMXO2-2000HC-4TG100I, BGA2869 and SPX3819M5-L-3-3. 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.
From the BellssGit/FPGA-SDR-FM-RADIO repository on GitHub, at the commit this page was made from: the board is Hardware/R820T_With_LCMXO2/R820T_With_LCMXO2.kicad_pcb and its schematic Hardware/R820T_With_LCMXO2/R820T_With_LCMXO2.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository publishes it under the Apache-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).