Description

The INMP441 is a high-performance, low-power, digital output omnidirectional MEMS(Micro-Electro-Mechanical Systems) microphone.

A complete INMP441 solution consists of a MEMS sensor, signal composition conditioning, an analog-to-digital converter, an 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 need for an audio codec in the system. With its high signal-to-noise ratio, the INMP441 is an excellent choice for near-field applications. The INMP441 features a flat, wideband frequency response, resulting in natural, high-clarity sound.

Product Features:

• Digital I²S interface with high-precision 24-bit data

• High signal-to-noise ratio of 61 dBA

• High sensitivity -26 dBFS

• Stable frequency response from 60 Hz to 15 kHz

• Low power consumption: Low current consumption of 1.4 mA

• High PSR: -75 dBFS

Interface Definitions:

• SCK: Serial data clock for the I²S interface

• WS: Serial data word select for the I²S interface

• L/R: Left/Right channel select.
  When set low, the microphone outputs the signal in the left channel of the I²S frame.
  When set high, the microphone outputs the signal in the right channel.

• SD: Serial data output for the I²S interface.

• VCC: Input power supply, 1.8V to 3.3V.

• GND: Power ground