【Product Introduction】
INMP441 is a high-performance, low-power, digital output, omnidirectional MEMS microphone with a bottom port. The complete INMP441 solution consists of a MEMS sensor, signal conditioning, analog-to-digital converter, anti aliasing filter, power management, and industry standard 24 bit I ² S interface. The I ² S interface allows the INMP441 to be directly connected to digital processors such as DSP and microcontrollers without the need for audio codecs used in the system. INMP441 has a high signal-to-noise ratio and is an excellent choice for near-field applications. INMP441 has a flat broadband frequency response, resulting in high clarity of natural sound.
【Product Features】
1. Digital I ² S interface with high-precision 24 bit data
2. High signal-to-noise ratio of 61 dBA
3. High sensitivity -26 dBFS
4. Stable frequency response from 60 Hz to 15 kHz
5. Low power consumption: low current consumption of 1.4 mA
6. High PSR: -75 dBFS
【 Interface definition 】
SCK: Serial Data Clock for I ² S Interface
WS: Serial Data Word Selection for I ² S Interface
L/R: Left/right channel selection.
When set to low level, the microphone outputs a signal in the left channel of the I ² S frame.
When set to high level, the microphone outputs a signal in the right channel
SD: Serial data output of I ² S interface.
VCC: Input power supply, 1.8V to 3.3V
GND: Power Ground
Connecting with ESP32 development board：
INMP441 ESP32
1.SCK >> GPIO14
2.SD >> GPIO32
3.WS >> GPIO15
4.L/R >> GND
5.GND >> GND
6.VDD >> VDD3.3
