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Analog Devices: EVAL-ADMP521Z-FLEX Evaluation Board for the ADMP521 Ultra-Low Noise Microphone

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Kit Overview

 

The Analog Devices EVAL-ADMP521Z-FLEXEVAL-ADMP521Z-FLEX is a simple evaluation board that allows quick evaluation of the performance of the ADMP521ADMP521 MEMS microphone. The small size and low profile of the flexible printed circuit board (PCB) enable direct placement of the microphone into a prototype or an existing design for an in situ evaluation. The EVAL-ADMP521Z-FLEX consists of an ADMP521 microphone and a 0.1 μF bypass capacitor soldered to a flexible PCB with color-coded wires attached.

 

The ADMP521ADMP521 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.

 

Key Applications: Smartphones and feature phones, Tablet computers, Teleconferencing systems, Digital still & video cameras, Bluetooth headsets, Notebook PCs, Security and surveillance

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Technical Documents

Learning Center

 

TypeDescription
User GuideADI: User Guide (UG-326) for EVAL-ADMP521Z-FLEX Bottom-Ported, Digital Output, MEMS Microphone Evaluation Board
DatasheetADI: Datasheet for ADMP521 Ultralow Noise Microphone with Bottom Port and PDM Digital Output (Rev A)
Application NoteADI: Application Note (AN-1140) for Microphone Array Beamforming
Application NoteADI: Application Note (AN-1124) for Recommendations for Sealing ADI Bottom-Port MEMS Microphones from Dust and Liquid Ingress
Application NoteADI: Application Note (AN-1112) for Microphone Specifications Explained
Application NoteADI: Application Note (AN-1068) for Reflow Soldering of the MEMS Microphone
Application NoteADI: Application Note (AN-1003) for Recommendations for Mounting and Connecting Analog Devices, Inc., Bottom-Ported MEMS Microphones

 

Design Elements

 

TypeDescription
CAD ModelADI: CAD Model for ADMP521ACEZ-RL (BXL File format)
Simulation ModelADI: IBIS Model for ADMP521
Application LibraryADI: Application Library for Microphone Beamforming Simulation Tool (32-bit)
Application LibraryADI: Application Library for Microphone Beamforming Simulation Tool (64-bit)

 

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Kit Features

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Key Features for ADMP521ADMP521 Ultra-Low Noise Microphone are as below:

  • 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 S-Σ modulator
  • Digital PDM output
  • Compatible with Sn/Pb and Pb-free solder processes

 

 

 

 

 

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Kit Contents

 

The Analog Devices EVAL-ADMP521Z-FLEXEVAL-ADMP521Z-FLEX is supplied with below contents:

  • Evaluation Board

 

 

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