Inmp441 Omnidirectional Microphone Module I2S

INMP441 Omnidirectional Microphone Module



The INMP441 is a powerful, energy-saving, omnidirectional MEMS microphone with digital output and connection at the bottom. The complete INMP441 solution consists of a MEMS sensor, signal preparation, analog-to-digital converter, anti-aliasing filter, power management and an industry-standard 24-bit I2S interface.



 







Compatible: Via the I2S interface, the INMP441 can be directly connected to digital processo such as DSPs and microcontrolle without the need for an audio codec for use in the system.



Compact design: The INMP441 has a high signal-to-noise ratio and is an excellent choice for near-field applications. The INMP441 features a flat broadband frequency response that results in a high resolution of natural sound.



High performance: digital I2S interface with high-precision 24-bit data; the high signal-to-noise ratio is 61 dBA; high sensitivity – 26 dBFS; stable frequency response from 60 Hz to 15 kHz; low power consumption: low power consumption 1.4 mA; high PSR: -75 dBFS







INMP441 Omnidirectional Microphone Module



 



1. Digital I2S interface with high precision 24-bit data.







2. High signal to noise ratio is 61 dBA







3. High sensitivity – 26 dBFS.







4. Stable frequency response from 60 Hz to 15 kHz







5. Low power consumption: low current consumption 1.4 mA.







6. High PSR: -75 dBFS.







Interface definition:



SCK: Serial data clock for I2S interface.







WS: Serial data word selection for I2S interface.







L/R: Left/Right channel selection.







When set to low, the microphone outputs a signal on the left channel of the I2S frame.







When set to high level, the microphone outputs signals on the right channel







SD: Serial data output of the I2S interface.







VCC: Input power, 1.8V to 3.3V.







GND: power ground.



Connect to ESP32: (INMP441 ESP32)



SCK >> GPIO14







SD >> GPIO32







GPIO15.







L/R >> GND







GND >> GND







VDD >> VDD3.3.