INMP441 — Digital Omnidirectional MEMS Microphone (Bottom Port) Key benefits signaltonoise ratio and omnidirectional pickup make the INMP441 ideal for clear nearfield voice capture. Digital output with industrystandard 24bit I2S simplifies system design by removing the need for an external audio codec. Integrated components (MEMS sensor, signal conditioning, ADC, antialiasing filter, and power management) deliver a complete microphone front end in a single part, reducing design complexity and integration time. Low power operation supports batterypowered and alwayson voice applications. What it does and how it helps Captures speech and nearfield audio with fidelity and low noise, improving recognition accuracy for voice interfaces and teleconferencing. Provides a direct digital I2S stream that can be connected to DSPs and microcontrollers without intermediate analog processing, streamlining signal chain and improving robustness to analog interference. Bottomport omnidirectional design enables flexible mechanical integration into enclosures while maintaining consistent pickup from all directions. Important attributes Function: Omnidirectional voice capture with onboard signal conditioning and 24bit digital output (I2S). Output: Digital I2S interface (24bit) for direct connection to digital processors. Integration: Includes MEMS sensor, ADC, antialiasing filter, signal conditioning, and power management in one solution. Port type: Bottom port. Power: Low power operation suitable for portable and alwayson devices. Compatibility: Directly interfaces with DSPs, microcontrollers, and other digital processors that support I2S, eliminating the need for a separate audio codec. Practical applications Smart speakers and voice assistants: Provides clear nearfield voice capture and a direct digital interface for the device processor. Wearables and portable devices: Low power, integrated digital output enables compact voiceenabled designs. Conference and hands systems: Omnidirectional, lownoise capture improves call clarity and speech recognition performance. Integration notes Connects directly to any digital processor that supports I2S (e.g., DSPs, microcontrollers), simplifying BOM and system architecture. Bottomport orientation should be considered when designing the device enclosure and acoustic path. Specifications summary (as provided) signaltonoise ratio for nearfield applications performance, low power, digital output omnidirectional MEMS microphone Bottom port Integrated MEMS sensor, signal conditioning, ADC, antialiasing filter, and power management Industrystandard 24bit I2S interface for direct digital connection to processors