MEMS Microphones

MEMS Microphones from Analog Devices combine over 20 years of MEMS know-how with decades of audio signal processing expertise and provide unprecedented performance and reliability. Featuring the industry's most robust audio performance specifications, ADI MEMS microphones provide up to 65 dBA SNR for superior far field audio capture, and wideband frequency response from 100 Hz up to 20 kHz for superb intelligibility. Offering more flexibility to design engineers, they are a fraction of the size of electret microphones, available with analog or digital outputs, including I²S, and unlike electret microphones can be reflowed with other components. Complementary audio signal chain components include: Low Power CODECs, SigmaDSP® Processors, Blackfin® Processors and Class-D Amplifiers.

PRODUCT SELECTION TABLES

Design Resources

Circuits From the Lab
- CN0208: High Performance MEMS Digital Microphone's Simple Interface to SigmaDSP Audio Processor
- CN0207: High Performance MEMS Analog Microphone's Simple Interface to SigmaDSP Audio Codec
- CN0078: Digital MEMS Microphone Simple Interface to a SigmaDSP Audio Codec
- CN0262: Low Noise Analog MEMS Microphone and Preamp with Compression and Noise Gating
- CN0266: High Performance Digital MEMS Microphone Standard Digital Audio Interface to Blackfin DSP

MEMS Microphones Application Notes
- AN-1181: Using a MEMS Microphone in a 2-Wire Microphone Circuit (pdf)
- AN-1165: Op Amps for MEMS Microphone Preamp Circuits (pdf)
- AN-1068: Reflow Soldering of the MEMS Microphone (pdf)
- AN-1140: Microphone Array Beamforming (pdf)
- AN-1124: Recommendations for Sealing Analog Devices, Inc., Bottom-Port MEMS Microphones from Dust and Liquid Ingress (pdf)
- AN-1112: Microphone Specifications and Terms Explained (pdf)
MEMS Microphones Evaluation Boards and Kits

Technical Articles
- MS-2348 Low Self Noise: The First Step to High Performance MEMS Microphone Applications
- Making Beautiful Music With Smart MEMS Microphones
- Understanding Microphone Sensitivity
  (Analog Dialogue, Volume 46 – May 2012)
- MS-2275: Common Inter-IC Digital Interfaces for Audio Data Transfer
- Tech Article Library
Customer Application Examples
- Intelligent Agricultural Solutions enables ultraefficient field seeding with help from ADI's advanced MEMS microphones and single-chip audio processors. (pdf)
Brochures and Bulletins
- High Performance Technologies for Portable Healthcare Devices (pdf)
- Industrial ICs Solution Bulletin, Vol 10, Issue 8

MEMS Microphones

Part#	Output	Port Location	SNR (dBA)	Equivalent Input Noise (dBA)	Frequency Response (min)	Frequency Response (max)	Maximum SPL	Sensitivity @ 1 kHz	Package	US Price 1000-4999
ADMP411	Analog	Bottom	62dB	32dB	28Hz	20KHz	131dB SPL	-46 dBV	4.72mm × 3.76mm LGA	$2.65
ADMP521 Reference Circuit Available	PDM	Bottom	65dB	29dB	100Hz	20KHz	120dB SPL	-26 dBFS	3.00x4.00x1.00mm LGA	$2.25
ADMP441 Reference Circuit Available	I2S	Bottom	61dB	33dB	60Hz	15KHz	120dB SPL	-26 dBFS	4.72× 3.76x1.00mm LGA	$2.38
ADMP504 Reference Circuit Available	Analog	Bottom	65dB	29dB	100Hz	20KHz	120dB SPL	-38 dBV	3.35x 2.5x0.88mm LGA	$1.95
ADMP404 Reference Circuit Available	Analog	Bottom	62dB	32dB	100Hz	15KHz	120dB SPL	-38 dBV	3.35x 2.5x0.88mm LGA	$1.2
ADMP405 Reference Circuit Available	Analog	Bottom	62dB	32dB	200Hz	15KHz	120dB SPL	-38 dBV	3.35x 2.5x0.88mm LGA	$1.5
ADMP401 Reference Circuit Available	Analog	Bottom	62dB	32dB	60Hz	15KHz	120dB SPL	-42 dBV	4.72× 3.76x1.00mm LGA	$1.7
ADMP421 Reference Circuit Available	PDM	Bottom	61dB	33dB	100Hz	15KHz	120dB SPL	-26 dBFS	3.00x4.00x1.00mm LGA	$1.5