Analog Devices, Inc. (ADI) recently introduced the industry's first high-performance ADMP441 iMEMSÂ® microphone, which provides I2S digital output. The ADMP441 also features an extended frequency response from 100 Hz to 15 kHz, a high signal-to-noise ratio (SNR) of 61 dBA, and a high power supply rejection ratio (PSRR) of 80 dBFS, which are ADI's award-winning MEMS microphone family. Quality assurance logo. The new MEMS microphones feature patented ADI MEMS and audio signal processing technology and are available in a thin 4.72 mm X 3.76 mm X 1.00 surface mount package. It supports reflow soldering without sacrificing sensitivity.
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Kieran Harney, director of product line for MEMS and sensor technology at Analog Devices, said: "Over the years, audio designers have had to use additional signal processing to convert the microphone output signal into a standard I2S format for non-mobile applications, both at the same time increasing system cost. The design is also more complex. The innovative ADMP441 offers industry-standard I2S output, plug-and-play support, and small package size that not only simplifies audio system design, but also reduces overall signal chain cost and complexity. ADMP441 is ADI's ever-expanding high The latest in the performance MEMS microphone family meets the market needs for better sound quality and smaller size."
Key features and advantages
The I2S digital interface provides high-precision 24-bit data, supports plug-and-play, and is compatible with industry-standard digital interfaces for non-mobile applications.
With a signal-to-noise ratio (SNR) of up to 61 dBA, it delivers excellent sound quality and high-definition sound in far-field applications.
A flat frequency response from 100 Hz to 15 kHz produces a highly balanced and natural sound.
The high power supply rejection ratio (PSRR) of 80 dBFS provides excellent RF and electrical noise rejection, giving designers more flexibility in placing microphones and routing power.
In addition, the ADMP441 is fully compliant with the TIA-920 standard: the transmission requirements for broadband digital wireline telephones for telecom terminal equipment.
Supply and quotation
The ADMP441 iMEMS microphone will be available in volume production in June 2011. Samples are available now, priced at $2.38 per unit in 1,000-piece quantities.
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