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ADMP421:  iMEMS® Microphone Omni Directional Microphone with Bottom Port and Digital Output

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 ADMP421 has a high ...More

ADMP421:  iMEMS® Microphone Omni Directional Microphone with Bottom Port and Digital Output

Product Description

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 ADMP421 has a high SNR of 60.5 dBA, and a high sensitivity, of -26 dBFS. The high SNR and sensitivity make the ADMP421 excellent for far field applications. The ADMP421 has a flat frequency response from 100 Hz through 15 kHz. Low current consumption enables long battery life for portable applications. A built in particle filter provides for high reliability.

The ADMP421 will be available in a very thin 3 mm × 4 mm × 1 mm surface mount package. It is reflow solder compatible with no sensitivity degradation.

Applications

  • Cell Phones
  • PC Audio
  • Digital Cameras
  • Bluetooth Headsets

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  • Small and thin 3 mm × 4 mm × 1 mm surface mount package
  • High SNR 60.5 dBA
  • High Sensitivity -26 dBFS
  • Flat Frequency Response from 100 to >12 kHz
  • Low Current Consumption < 650 μAmps
  • High PSRR of 80 dBFS
  • 4th Order Sigma Delta Modulator
  • Digital PDM output
  • Compatible with Sn/Pb and Pb-free solder processes
  • RoHS Compliant
  • Supply Current : 650µA
  • Type: Digital
  • Port Location: Bottom
  • SNR (dBA): 61dB
  • Noise Typical (dBA): 33dB
  • Sensitivity @ 1 kHz: -26 dBFS
  • PSRR: 80 dBFS
  • Frequency Response: 100 Hz to 15 kHz
  • Package: 3.00 mm x 4.00 mm LGA
  • I(sleep) (uA): 50µA

ADMP421 Functional Block Diagram

Similar Products

arrow View Full Interactive Product Selection Table
Part# Type Port Location SNR (dBA) Noise Typical (dBA) Sensitivity @ 1 kHz PSRR Frequency Response Supply Current I(sleep) (uA) Package Price* (1000-4999)
ADMP401 Analog Bottom 62 32 -42 dBV 70 dBV 100 Hz to 15 kHz 250µA n/a 4.72mm × 3.76mm LGA $1.63
ADMP421 Digital Bottom 61 33 -26 dBFS 80 dBFS 100 Hz to 15 kHz 650µA 50 3.00 mm x 4.00 mm LGA $2.04
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* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

Pricing, Packaging & Availability

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For detailed drawings and chemical composition please consult our  Package Site

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Price
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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RoHS Compliant
Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.

View PCN
This is the list of Product Change Notifications (PCN) published on the web for this model. Click on the link to access PCN Information.Only select pre-2009 PCN�s are available on-line. To obtain a pre-2009 PCN, contact your ADI Sales Rep. For more information on ADI's PCN process, please visit our PCN Policy Statement page

*The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.