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SparkFun BOB-09868 Breakout Board for ADMP401 MEMS Microphone

(2 customer reviews)

£9.97 inc VAT (£8.31 ex VAT)

5 in stock

Brand: SparkFun
Part Number: BOB-09868
SKU: PPBOB-09868
Barcode: 5055421001858

Categories: ,

SparkFun BOB-09868 Breakout Board for ADMP401 MEMS Microphone

This tiny breakout board features the ADMP401 MEMs microphone. One of the key advantages to this breakout and microphone is the bottom ported input. This means the microphone’s input can fit flush against the enclosure of your project. Plus you will not have to deal with trying to solder the microphone’s wacky footprint. Wootness!

The amplifier on the breakout has a gain of 67 and more than meets the bandwidth requirements of the mic. The amplifier’s AUD output will float at one half Vcc when no sound is being picked up. The amplifier produces a peak-to-peak output of about 200mV when the microphone is held at arms length and is being talked into at normal conversational volume levels. So the AUD output can easily be connected to the ADC of a micro.


  • -3dB roll off at 100Hz and 15kHz
  • 1.5 to 3.3VDC supply voltage
  • Should comfortably output 40mW
  • SNR of -62dBA


Additional information

Weight0.5 kg

Part Number






2 reviews for SparkFun BOB-09868 Breakout Board for ADMP401 MEMS Microphone

  1. DGHN

    Works well off 3V supply but remember you need to decouple AC signal via capacitor (10 uF) and load resistor (perhaps 10 kOhm). Sounds bright enough, but volume 3-6 dB lower than a standard electret. Gain of x67 is quite meagre; I would prefer x100. Neat

  2. Hornblower

    I used it to build a sound-activated display with an arduino. The mic is easy to hook up using 3.3v, and sensitive enough to drive analogue input with detected sound (quiet) 4m away. It can also drive a standard computer audio-in input with good audio

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