INMP522 MEMS Digital Microphone

INMP522 MEMS Digital Microphone

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

Features and Benefits
  • Sensitivity tolerance of ±1 dB
  • Small and thin 4 mm x 3 mm x 1 mm surface-mount package
  • Omnidirectional response
  • Very high SNR of 65 dBA
  • Sensitivity of -26 dBFS
  • Extended frequency response from 75 Hz to greater than 20 kHz
  • Low current consumption of 800 µA
  • Sleep mode for extended battery life: less than 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
Applications
  • Smartphones and feature phones
  • Microphone arrays
  • Tablet computers
  • Teleconferencing systems
  • Digital still and video cameras
  • Bluetooth headsets
  • Notebook PCs
  • Security and surveillance

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