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Date: 20-01-11

Digital MEMS microphone with I2S interface

Analog Devices has introduced the new digital MEMS microphone with 24 bit I2S (Inter-IC Sound) digital output. The ADMP441 supports audio frequency range of100 Hz to 15 kHz, feature SNR (signal-to-noise ratio) of 61 dBA, and high PSRR (power-supply-rejection ratio) of 80 dBFS. It measures 4.72 mm × 3.76 mm × 1.00 mm in size. This SMD device is reflow solder compatible with no sensitivity degradation.

"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 is ADI's latest installment in a growing portfolio of high performance MEMS microphones that meet the demand for better sound quality and smaller footprints."

The other key features include:
Provides plug-and-play compatibility with industry standard digital interface for non-handset applications.
ADMP441 fully complies with the TIA-920 Telecommunications Telephone Terminal Equipment Transmission Requirements for Wideband Digital Wireline Telephones standard.
Availability: Now in samples volumes in June 2011
Price: Each $2.38 per 1K pieces

Editorial Product Rating: ** (Average Plus)

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