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Evaluation Board, ADMP421 Omnidirectional Microphone, Bottom Port and Digital Output


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IVSEVINMP421   Datasheet
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Product Overview

The EVAL-ADMP421Z is an bottom ported digital output MEMS microphone evaluation board of 13mm × 18mm size. It is a simple evaluation board that allows quick evaluation and performance of the ADMP421 MEMS microphone. The EVAL-ADMP421Z has a dual row 12 pin, 0.1 inch spaced header for access to all microphone pins. The EVAL-ADMP421Z is designed to plug directly into Connector J6 on the EVAL-ADAU1761Z evaluation board. The Evaluation board contains factory installed 0.1 µF capacitor, C1, is a bypass capacitor that reduces supply noise and ensures proper microphone operation. The ADMP421 is a low cost, low power, digital output bottom ported omni directional MEMS microphone. The ADM421 consists of a MEMS microphone element, an output amplifier and a 4th order sigma delta modulator. The digital interface allows for the PDM (Pulse Density Modulated) output of two microphones to be time multiplexed on a single data line using a single clock.
  • The 12 pin header connects all microphone signals directly to EVAL-ADAU1761Z or EVAL-ADAU1361Z
  • ADMP421 is a small and thin 3mm × 4mm × 1mm surface mount package IC
  • ADMP421 has a high SNR of 61dBA and high sensitivity of -26dBFS, useful for far field applications
  • It has flat frequency response from 100Hz to 15kHz
  • It has low current consumption of <650µA
  • It provides sleep mode for extended battery life
  • It provides high PSR of 80dBFS
  • It exhibits fourth-order Σ-Δ modulator
  • It gives digital PDM output
  • EVAL-ADMP421Z board is RoHS compliant


Portable Devices, Imaging, Video & Vision, Multimedia, Audio


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Product Information

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Analog Devices


Audio, Video

MEMS Device

Bypass capicator, DC blocking capicator


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Technical Documents (1)

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CAD Models - Notice
CAD Models and drawings are provided to you on a revocable limited licence for your internal use only but remain the property of the manufacturer who retain all intellectual property rights and ownership. They are provided to assist you in decision making and as design guide but are not guaranteed to be error free, accurate or up to date and is not intended to be taken as advice.
Use of these CAD models and other options provided are downloaded and used entirely at your own risk and by continuing you confirm acceptance of the above.

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Available to manufacturer lead time 27 weeks

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