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Product description: Analog MEMS Microphone Breakout - MEMS analog microphone module - VM2020 - SparkFun BOB-21537
Analog MEMS microphone with differential output from SparkFun . It is equipped with the VM2020 chip, containing an omnidirectional microphone that picks up sounds coming from different directions well. The microphone consists of a piezoelectric sensor and circuits for buffering and amplifying the output signal . The SNR (Signal-to-noise ratio) is 50 dBA and the sensitivity is approximately -63 dBV . The module is used in applications that are based on measuring the volume in a given environment, it can also be used to quickly analyze the Fourier transform of sound at concerts, and even base an adaptive filter on it for a smart speaker.
Analog MEMS Microphone Breakout - MEMS analog microphone module - VM2020 - SparkFun BOB-21537.
The board has outputs in the form of solder pads.
How to connect a microphone?
The Analog MEMS Microphone Breakout board has leads in the form of solder pads. Solder the wires to them and connect them with the control module (e.g. with Arduino) according to the dependencies below:
- OUT- - audio signal output for differential output (negative)
- OUT+ - audio signal output for differential output (positive)
- VCC - supply voltage from 1.6 V to 3.6 V DC
- GND - system ground
You can find an example of a connection diagram in the user's guide .
Module technical specification
- Type: microphone
- Microphone type: differential analog
- Technology: MEMS
- Scope: omnidirectional microphone
- Built-in chip: VM2020
- Frequency range: 80 Hz to 10 kHz
- Acoustic overload point (AOP): ~10% distortion at 152 dB
- Supply voltage: 1.6 V to 3.6 V DC
- Typical current draw: 248 uA
- Signal-to-noise ratio SNR (Signal-to-noise ratio): 50 dBA
- Sensitivity: about -63 dBV
- Output Impedance: 1100 Ohms
- Sealing class: OP57
- Board dimensions: 10.16 x 13.97 mm
- Weight: 0.54g
Kit contents
- Analog MEMS Microphone Breakout - MEMS analog microphone module - VM2020 - SparkFun BOB-21537 - 1 piece
Low profile and omnidirectional MEMS Mic from SparkFun. 
