Product introduction:
1.INMP441 is a high performance, low power consumption, digital output, omnidirectional MEMS microphone with bottom port.
2. The module's complete INMP441 solution consists of a MEMS sensor, signal conditioning, analog-to-digital converter, anti-aliasing filter, power management and industry-standard 24-bit I²S interface.
3.The I²S interface allows the INMP441 to be directly connected to digital processors such as DSPs and microcontrollers without the use of audio codecs used in the system.
4.INMP441 has a high signal-to-noise ratio and is an excellent choice for near-field applications.
5.INMP441 has a flat broadband frequency response, resulting in natural sound with high definition.
Product Features:
1. Digital I²S 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 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 level, the microphone outputs a signal on the left channel of the I²S frame.
When set to high level, the microphone outputs a signal on the right channel
SD: Serial data output of I²S interface.
VCC: Input power supply, 1.8V to 3.3V.
GND: power ground
Connection method between INMP441 and ESP32 development board:
SCK >> GPIO14
SD >> GPIO32
WS >> GPIO15
L/R >> GND
GND >> GND
VDD >> VDD3.3