Pdm microphone board
About the Pdm microphone board
Pdm microphone board is an open source PCB design by antmicro, published on GitHub under the Apache-2.0 license. It is a 4-layer board measuring 10.7 × 11 mm, with 11 components from 9 distinct parts.
By type, the board carries 3 diodes, 3 capacitors, 2 resistors, 1 connector, 1 microphone and 1 inductor.
From the project
This project contains open hardware design files for a microphone board with an SPH0644LM4H-1 PDM microphone. The board break-routes PDM signals from the microphone to a zero insertion force connector. Additionally, the board provides voltage filtering and ESD protection.
This project contains open hardware design files for a microphone board with an SPH0644LM4H-1 PDM microphone. The board break-routes PDM signals from the microphone to a zero insertion force connector. Additionally, the board provides voltage filtering and ESD protection.
The design files were prepared in KiCad 8.x.
Knowles SPH0644LM4H-1 Zero insertion force connector for a 5 pin, 0.5 mm pitch FFC Selectable Left or Right channel audio transmitting Designed to fit an 11mm diameter opening * Alignment cutouts for toolless mounting
Pdm microphone board bill of materials (BOM)
11 components, 9 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 501951-0550 Conn_FFC_Molex_5019510550 Molex | Conn_FFC_Molex_5019510550 | J1 |
| 1 | SPH0644LM4H-1 MK_SPH0644LM4H-1 Knowles | MK_SPH0644LM4H-1 | MK1 |
| 3 | TPD1E0B04DPYR TPD1E0B04_XDFN-2 Texas Instruments | XDFN-2_1x0.60mm | D1, D2, D4 |
| 1 | BLM15AG601SN1D FB_600Z_0.3A_Murata-BLM15AG_0402 Murata | FB_0402_1005Metric | FB1 |
| 1 | 04025A181JAT2A C_180p_0402 AVX | C_0402_1005Metric | C1 |
| 1 | GCM155L8EH104KE07D C_100n_50V_X8L_0402 Murata | C_0402_1005Metric | C2 |
| 1 | C1005X6S1A105K050BC C_1u_0402 TDK | C_0402_1005Metric | C3 |
| 1 | CR0402-FX-51R0GLF R_51R_0402 Bourns | R_0402_1005Metric | R1 |
| 1 | ERJ2GE0R00X R_0R_0402 Panasonic | R_0402_1005Metric | R2 |
Pdm microphone board design files
The KiCad project lives in the antmicro/pdm-microphone-board repository on GitHub; these links point at the commit this page was built from.
- Layoutmicrophone-board.kicad_pcb
- Schematicmicrophone-board.kicad_sch
Pdm microphone board: common questions
How big is the Pdm microphone board?
The Pdm microphone board measures 10.7 × 11 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Pdm microphone board?
11 components, from 9 distinct parts. The full bill of materials is listed on this page.
Where can I download the Pdm microphone board design files?
From the antmicro/pdm-microphone-board repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Pdm microphone board design in my own project?
Yes, under the terms of its Apache-2.0 license, which antmicro chose for the repository.