Adafruit PDM MEMS MST Microphone Breakout

Artikelnummer: AF3492

Kategorie: Sound/Noise


5,26 €

inkl. 19% USt.,

2 Packung auf Lager

Lieferfrist: ca. 1 - 2 Tage

Packung


Beschreibung

An exotic new microphone has arrived in the Adafruit shop, a PDM MEMS Microphone! PDM is the 'third' kind of microphone you can integrate with electronics, apart from analog or I2S. These microphones are very commonly used in products, but are rarely seen in maker projects. Still, they have some benefits so we thought we'd offer a breakout for the shop.

The first thing to note is that this sensor does not provide an 'analog' output like many of our electret microphone assemblies. So it's great for chips that do not have analog inputs. Secondly, the digital interface is a very simplistic pulse density modulation output. It's digital but its not PWM and it's not I2S. You will need to make sure your chip has a PDM interface - most 32-bit processors these days do!

PDM is a little like 1-bit PWM. You clock the mic with a 1 MHz - 3 MHz clock rate, and on the data line you'll get a square wave out that syncs with the clock. The data line with be 0 or 1 logic output, with the square wave creating a density that when averaged will result in the analog value out.

There's a few ways to manage these mics:

  • Your chip comes with a hardware peripheral and library that does all the data managing at high speed, collects samples, applies a filter and gives you an analog value 
  • Your chip comes with a hardware peripheral that gives you values, then it is up to you to perform the decimation/filtering. 
  • Your chip does not come with a hardware peripheral but you're pretty clever and come up with a way to make it work 
  • You generate the high speed clock, then add an analog filter on the data line, and read the analog value 

Either way you decide to go, make sure you have a handle on what support you get with your platform, as these chips are a little tricky!

Each order comes with one fully assembled and tested microphone, and a little header to solder on for breadboard-compatibility. 

TECHNICAL DETAILS

  • Voltage Range: 1.8-3.3V
  • Clock rate: 1 - 3.25 MHz
  • Current draw: 0.6mA
  • SNR: 61 dB
  • Sensitivity: ~-26 dBFS

Product Dimensions: 14.0mm x 12.8mm x 2.8mm / 0.6" x 0.5" x 0.1"

Product Weight: 0.5g / 0.0oz

Dokumente

Produkt Page

Bewertungen (0)

Durchschnittliche Artikelbewertung

Geben Sie die erste Bewertung für diesen Artikel ab und helfen Sie Anderen bei der Kaufenscheidung:

----

ähnliche Produkte:
Adafruit Silicon MEMS Microphone Breakout - SPW2430 Adafruit Silicon MEMS Microphone Breakout - SPW2430
43 Packung auf Lager
SparkFun MEMS Microphone Breakout - INMP401 (ADMP401) SparkFun MEMS Microphone Breakout - INMP401 (ADMP401)
10 Packung auf Lager
Kunden kauften dazu folgende Produkte
Adafruit Silicon MEMS Microphone Breakout - SPW2430 Adafruit Silicon MEMS Microphone Breakout - SPW2430
43 Packung auf Lager
SparkFun Wireless ESP32 Thing Espressif Inside WLAN & BLE... SparkFun Wireless ESP32 Thing Espressif Inside WLAN & BLE...
5 Packung auf Lager
Adafruit MPL3115A2 - I2C Barometric Pressure Altitude... Adafruit MPL3115A2 - I2C Barometric Pressure Altitude...
3 Packung auf Lager