InvenSense's 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 beam-forming 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 mm x 3 mm x 1 mm surface-mount package. It is reflow-solder compatible with no sensitivity degradation.

View INMP522 Functional Block Diagram