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19 Jul 2017, 13:37

Reference Design of Digilent Pmod MIC3

This is a reference design of Digilent Pmod MIC3 – RS Part Number: (134-6475) . The Digilent Pmod MIC3 was converted into DesignSpark PCB format. Download link of the project files and the datasheet of Digilent Pmod MIC3 can be found in this article.

The Digilent Pmod MIC3 is a Pmod microphone module. It can output the audio in 12-bit digital format by a Pmod interface. The user can adjust the gain easily by changing the value of the trimmer resistor. 

  • SPA2410LR5H-B Low Noise Zero-Height SiSonicTM Microphone
  • Built-in Analog to Digital Converter
  • Adjustable gain
  • Pmod Interface

Schematic of Digilent Pmod MIC3

PCB layout of Digilent Pmod MIC3
3D view of Digilent Pmod MIC3


BOM list of the board (key components)

RS Part Number

Manufacturer Part Number






Noise Zero-Height SiSonicTM Microphone



Texas Instruments

12 bit Serial ADC



ON Semiconductor

Non-Inverting 3-State Buffer




1MHz Rail-Rail


ngmanyiu has not written a bio yet…

19 Jul 2017, 13:37


February 7, 2019 16:13

The Knowles MEMS mic (SPA2410LR5H-B) used in this reference design is going EOL in mid 2019. Contact Seltech for alternate microphone options.

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