ADMP521
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ADMP521

Ultra-Low Noise Microphone with Bottom Port and PDM Digital Output

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Part Details
Features
  • Small and thin 3 mm × 4 mm × 1 mm surface-mount package
  • Omnidirectional response
  • Very High SNR of 65 dBA
  • Sensitivity of −26 dBFS
  • Extended frequency response from 100 Hz to
    16 kHz
  • Low current consumption:
    900 µA
  • Sleep mode for extended battery life, <1 µA consumption
  • 120 dB maximum SPL
  • High PSR of -80 dBFS
  • Fourth-order Σ-Δ modulator
  • Digital PDM output
  • Compatible with Sn/Pb and
    Pb-free solder processes
  • RoHS/WEEE compliant
Additional Details
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Analog Devices has sold its MEMS Microphone product line to InvenSense.
Please visit the InvenSense ADMP521 product page for all technical support and sales information.

The ADMP521 is a high performance, ultra low noise, low power, digital output bottom-ported omnidirectional MEMS microphone. The ADMP521 consists of a MEMS microphone element and an impedance converter amplifier followed by a fourth-order Σ-Δ modulator. The digital interface allows for the pulse density modulated (PDM) output of two microphones to be time-multiplexed on a single data line using a single clock. The ADMP521 is function- and pin-compatible with the ADMP421 microphone, providing an easy upgrade path.

The ADMP521 has a very high SNR and common sensitivity of −26 dBFS, making it an excellent choice for far field applications. The ADMP521 has an extended wideband frequency response resulting in natural sound with high intelligibility. Low current consumption and a sleep mode with less than 1 µA current consumption enables long battery life for portable applications. The ADMP521 complies with the TIA-920 Telecommunications Telephone Terminal Equipment Transmission Requirements for Wideband Digital Wireline Telephones standard.

The ADMP521 is available in a thin 3 mm × 4 mm × 1 mm surface-mount package. It is reflow solder compatible with no sensitivity degradation. The ADMP521 is halide free.

APPLICATIONS

  • Smartphones and feature phones
  • Tablet computers
  • Teleconferencing systems
  • Digital still & video cameras
  • Bluetooth headsets
  • Notebook PCs
  • Security and surveillance

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 3

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EVAL-MIC-ALL

MEMS Microphone Evaluation Boards

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EVAL-ADMP521

ADMP521Z Evaluation Board

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EVAL-ADMP521

ADMP521Z Evaluation Board

ADMP521Z Evaluation Board

Product Detail

Analog Devices has sold its MEMS Microphone product line to InvenSense.
Please visit the InvenSense ADMP521 product page for all technical support and sales information.

This PCB includes the ADMP521 and a bypass capacitor mounted on a rigid PCB. The 12-pin header connects all microphone signals directly to a codec evaluation board such as the EVAL-ADAU1761Z or EVAL-ADAU1361Z, or to a custom evaluation system.

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EVAL-ADMP521-FLEX

ADMP521 FLEX Evaluation Board

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EVAL-ADMP521-FLEX

ADMP521 FLEX Evaluation Board

ADMP521 FLEX Evaluation Board

Product Detail

Analog Devices has sold its MEMS Microphone product line to InvenSense.
Please visit the InvenSense ADMP521 product page for all technical support and sales information.

This flex PCB includes just the ADMP521 and a bypass capacitor. The five wires allow an easy connection to the microphone’s PDM output data, clock, left/right select, VDD, and ground into your evaluation system. Two EVAL-ADMP521Z-FLEX boards can share common data, clock, VDD, and ground signals to multiplex both microphone signals on a common data line.

Tools & Simulations

Tools & Simulations 1

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