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High Performance MEM Microphone (ADMP441)

2016-02-12 05:56  
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This article describes the High Performance MEM Microphone (ADMP441). The principle is very simple, very practical. The circuit components can help you understand better grasp this principle. For example, in this circuit, you can go to find and buy these components: ADMP441.

Analog Devices, Inc. introduced today the ADMP441 iMEMS? microphone, the industry’s first high-performanceMEMSmicrophone with an I2S (Inter-IC Sound) digital output. The ADMP441 also features an extended frequency response from 100 Hz to 15 kHz, highSNR(signal-to-noise ratio) of 61 dBA, and highPSRR(power-supply-rejection ratio) of 80 dBFS – features that have become the hallmarks of Analog Devices’ award-winningMEMSmicrophone portfolio. The newMEMSmicrophone uses patentedADIMEMSand audio signal processing technologies and is available in a thin 4.72 mm × 3.76 mm × 1.00 mm surface-mount package. It is reflow solder compatible with no sensitivity degradation. To download the datasheet, please visit

“For years, audio designers have been forced to design in additional signal processing in order to convert microphone output signals into standard I2S formats for non-mobile phone use. This increased both system cost and design complexity,” said Kieran Harney, product line manager,MEMS/Sensors Technology Group, Analog Devices. “The innovative ADMP441 with industry standard I2S output offers plug–and-play use in a small footprint, simplifying audio system design while reducing overall signal chain cost and complexity. The ADMP441 isADI’s latest installment in a growing portfolio of high performanceMEMSmicrophones that meet the demand for better sound quality and smaller footprints.”

Key Features and Benefits:

Digital I2S interface with high-precision 24-bit data provides plug–and-play compatibility with industry standard digital interface for non-handset applications.HighSNRof 61 dBA enables excellent sound quality and intelligibility in far-field applications.Flat frequency response from 100 Hz to 15 kHz produces a well-balanced and natural sound.HighPSRRof 80 dBFS provides superior RF and electrical noise rejection allowing greater design flexibility for microphone placement and power trace routing.

 


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