Description 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 industry standard 24-bit I2S interface. The I2S interface allows the INMP441 to be directly connected to digital processors such as DSPs and microcontrollers without the need for an audio codec for use 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 wideband frequency response that results in high definition of natural sound. Applications ESP32 Based Audio Recorders / Playback systems DIY Google Assistant, Amazon Alexa, Siri, Cortana Bluetooth Headsets Two-Way Communicators Portable Voice Recorders IP Phones/Telephone Conferencing Technical Specifications Type: MEMS Operating Voltage: 1.8v-3.3v Current Consumption Operating Current: 1.4mA ~16mA @ 1.8v; 2.2mA ~2.5mA @3.3V Standby Current: 0.8mA @1.8V and 3.3v Power Down Current: 2uA @1.8V; 4.5uA @ 3.3V Output: Digital I2S Interface Frequency Response: 60Hz – 15 KHz Sensitivity: -26dB ±3dB @ 94dB SPL Signal to Noise Ratio: High signal to noise ratio is 61 dBA PSRR: -75dfs Dimensions: Diameter 14mm Weight: 0.7g ~ 1.0g Pinouts 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 Documents and Downloads INMP441 Datasheet ESP32 INMP441 based Matrix VU meter example Package Includes 1x Omnidirectional 24-Bit I2S MEMS Microphone Module – INMP441 Omnidirectional 24-Bit I2S MEMS Microphone INMP441 Module in Islamabad, Rawalpindi, Pakistan
