MPXx6400

The MPXx66400 series from NXP Semiconductors is a family of high-performance MEMS microphones designed for demanding audio applications. These devices feature a compact, surface-mount package with a sensitivity of –38 dB ± 2 dB (re. 1 V/Pa), enabling precise sound capture across a wide dynamic range. The microphone’s frequency response spans from 100 Hz to 20 kHz, ensuring clear and accurate reproduction of both low-frequency rumbles and high-frequency details. Key characteristics include a signal-to-noise ratio (SNR) of up to 65 dB, which supports clean audio input even in noisy environments, and a maximum sound pressure level (SPL) of 125 dB, making them suitable for high-intensity acoustic conditions such as industrial settings or live events. The MPXx66400 series operates on a supply voltage range of 1.8 V to 3.6 V, allowing flexible integration into battery-powered and low-power systems. It also features a digital output interface compliant with I2S or PDM protocols, simplifying connectivity with microcontrollers and DSPs. These microphones are optimized for use in voice-enabled consumer electronics, including smart speakers, headsets, and hearing aids. Their robust design ensures reliable operation in harsh environments, while the integrated anti-aliasing filter reduces signal distortion. Additionally, the devices support advanced noise cancellation algorithms when paired with compatible processing hardware, enhancing speech clarity in background noise. Applications extend to automotive infotainment systems, where they serve as part of hands-free communication modules, and to industrial IoT devices requiring environmental sound monitoring. In medical devices like portable diagnostic tools, their consistent performance and small footprint make them ideal for integration into compact, wearable systems. The MPXx66400 series is also well-suited for voice command interfaces in smart home hubs and other connected devices, offering stable and responsive audio input for natural language processing. NXP’s manufacturing quality and rigorous testing ensure long-term reliability and consistent performance under varying temperature and humidity conditions. With compliance to RoHS and REACH standards, these microphones meet global environmental and safety requirements. The series supports rapid prototyping and mass production due to its compatibility with standard SMT assembly processes.