Analog Devices has announced its lowest-noise MEMS (micro electromechanical system) microphone.
The microphone's SNR (signal-to-noise ratio) is 65dBA, or 29-dBA EIN (equivalent input noise). According to the supplier, this is the same SNR performance as an array of two individual 62dB SNR microphones.
The ADMP504 microphone has a frequency response up to 20kHz and a high PSR (power-supply-rejection) of 70dBV.
It is available in a 3.35mm x 2.50mm x 0.88mm surface-mount package.
For more information, visit: http://www.analog.com/ADMP504
To view a video on the application of the ADMP504, visit: http://videos.analog.com/video/products/MEMS-sensors/1431854772001/ADI-MEMS-Mics-Set-New-Bar-in-Noise-Performance/
For additional support, connect with engineers and ADI product experts on EngineerZone, an online technical support community: http://ez.analog.com/community/ask_the_expert/mems-microphones
Analog Devices believes the MEMS microphone can match the cost and useability of traditional electret condenser microphones (ECMs) in volume consumer applications like mobile phones.
There three factors drive MEMS technology: potential for higher audio quality, the small size and the presence in the market of multiple suppliers will affect the take-up of MEMS microphones.
The use of MEMS microphones is rising, according to figures from analyst IHS, worldwide shipments of MEMS microphones rose to 1.3 billion units in 2011, up 82% on 2010. The big market driver is mobile handsets.
The ADMP504 is a surface-mount MEMS microphone with a sensitivity specification of -38dBV. The high SNR of 65dBA, or 29dBA EIN, enables far-field audio-capture applications, as well as those using multi-microphone beam-forming algorithms.
Current consumption is specified at less than 180μA (typ) with a power supply voltage of 1.6V to 3.3V.