INMP522

Ultra Low-Noise, Low Sensitivity Tolerance PDM Digital Microphone

The INMP522 is a high-performance, ultra-low noise, low power, digital output, bottom-ported omnidirectional MEMS microphone. The INMP522 has a sensitivity tolerance of ±1 dB from part to part, making it ideal for microphone array and beamforming applications.

The INMP522 consists of a MEMS microphone element and an impedance converter amplifier followed by a fourth-order Σ Δ modulator. The digital interface enables the pulse density modulated (PDM) output of two microphones to be time multiplexed on a single data line using a single clock. The INMP522 is function and pin compatible with the INMP521 and INMP421 microphones, providing an easy upgrade path.

The INMP522 has a very high signal-to-noise ratio (SNR) and common sensitivity of −26 dBFS, making it an excellent choice for far-field applications. The INMP522 has an extended wideband frequency response, resulting in natural sound with high intelligibility. Low current consumption and a sleep mode with less than 2 µA current consumption enables long battery life for portable applications.

The INMP522 is available in a thin 4 × 3 × 1 mm surface-mount package. It is reflow solder compatible with no sensitivity degradation.

• ±1 dB Sensitivity Tolerance
• Small and Thin 4 mm × 3 mm × 1 mm Surface-Mount Package
• Omnidirectional Response
• Very High SNR of 65 dBA
• Sensitivity of −26 dBFS
• Extended Frequency Response from 75 Hz to >20 kHz
• Low Current Consumption of 800 µA

• Sleep Mode for Extended Battery Life, <2 µA consumption
• Acoustic Overload Point of 116 dB SPL
• High PSR of −83 dBFS
• Fourth-Order Σ-Δ Modulator
• Digital PDM Output
• Compatible with Sn/Pb and Pb-Free Solder Processes
• RoHS/WEEE Compliant