ADI Introduced the ADMP504

Published:2012/2/16 20:46:00 Author:Phyllis From:SeekIC

Analog Devices, Inc. (ADI) has introduced industry’s lowest-noise MEMS microphone: the ADMP504. The ADMP504 is an omnidirectional MEMS microphone with high performance, very low noise, low power, analog output and bottom-ported. It consists of a MEMS microphone element, an impedance converter and an output amplifier.

The ADMP504 is a surface-mount MEMS microphone that is reflow-solder-compatible with no sensitivity degradation. The sensitivity specification of -38 dBV is well suited for many codecs and discrete signal chain components. The high SNR of 65 dBA, or 29-dBA EIN, enables far-field audio-capture applications, as well as those using multi-microphone beam-forming algorithms. Low current consumption of <180 μA (typ) with a power supply voltage of 1.6 V to 3.3 V extends battery life for portable applications.

The ADMP504 has very high SNR and extended wideband frequency response, resulting in natural sound with high intelligibility. Low current consumption enables long battery life for portable applications. A built-in particle filter provides high reliability. The ADMP504 complies with the TIA-920 Telecommunications Telephone Terminal Equipment Transmission Requirements for Wideband Digital Wireline Telephones standard.

The ADMP504 sensitivity specification makes it an excellent choice for both near field and far field applications. The ADMP504 is function- and pin-compatible with the ADMP404 microphone, providing an easy upgrade path.

The ADMP504 addresses the demanding requirements found in many industrial, professional audio and video conferencing applications. The new microphone applies ADI’s patented MEMS technology and audio signal processing expertise and is available in a thin 3.35 mm × 2.50 mm × 0.88 mm surface-mount package.

Global shipments of MEMS microphones rose to 1.3 billion units in 2011, up 82% from 704 million in 2010 driven primarily by handsets.

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