Description

Product introduction:

The INMP441 is a high performance, low power, digital output, omnidirectional MEMS microphone with bottom port.

The complete INMP441 solution consists of a MEMS sensor, signal conditioning, analog-to-digital converter, anti-aliasing filter, power management and an industry standard 24-bit I²S interface. The I²S interface allows the INMP441 to connect directly to digital processors, such as DSPs and microcontrollers, without the use of audio codecs used in the system. The INMP441 has a high signal-to-noise ratio and is an excellent choice for near-field applications. The INMP441 has a flat broadband frequency response resulting in natural sounding 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, the microphone outputs the signal on the left channel of the I²S frame.

When set to high level, the microphone outputs the signal in the right channel

SD: Serial data output of the I²S interface.

VCC: Input power, 1.8V to 3.3V.

GND: power ground