Digital MEMS Microphones suit portable electronics applications.
November 2, 2010 -
Based on CMOS/MEMS membrane technology, Models WM7210 and WM7220 incorporate ADC, which outputs single-bit pulse density modulated format audio data stream. Output can be defined for left or right configuration, allowing for applications requiring stereo operation. Available in 4 x 3 x 1 mm and 4.72 x 3.76 x 1.25 mm packages, respectively, Models WM7210 and WM7220 are suited for mobile phones, PCs, portable media players, digital still cameras, and navigation devices.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press release
Wolfson Microelectronics plc
Westfield House
Edinburgh, , EH11 2QB
United Kingdom
Wolfson Delivers Crystal-Clear Audio with World-Leading Digital MEMS Microphones
Edinburgh, UK - Wolfson Microelectronics plc has today officially launched its next-generation digital silicon micro-electro-mechanical-systems (MEMS) microphones, the WM7210 and the WM7220.
Already in demand by many of the world's leading consumer electronics manufacturers, Wolfson's digital MEMS microphones combine low power consumption, excellent audio capture, superior signal-to-noise (SNR) ratio, low total harmonic distortion (THD) in a miniature low-profile package, making them ideal for applications such as mobile phones, PCs, portable media players, digital still cameras, and navigation devices.
The WM7210 and the WM7220 complement Wolfson's high volume family of analog MEMS microphones which were introduced in 2009. Based on Wolfson's proprietary CMOS/MEMS membrane technology, the new digital devices deliver high reliability and performance, and can withstand the high temperatures needed for automated flow solder assembly, which can damage conventional microphones.
Wolfson's digital microphones are class leading with the lowest THD performance, even at very high sound pressure levels. Low THD is essential in delivering crystal-clear sound, as loud sounds are often distorted by the microphone.
The WM7210 and WM7220 also help save battery life with ultra low power consumption in sleep mode. When the clock delivered to the microphone drops below a specified frequency, the microphones automatically power down into a sleep mode, consuming just a few micro amps.
Each microphone incorporates a high-performance ADC which outputs a single-bit Pulse Density Modulated (PDM) format audio data stream, while the microphone output can be defined for left or right configuration allowing for applications requiring stereo operation.
Nigel Burgess, Wolfson's Product Line Manager for MEMS Microphones, said, "Delivering ultra low distortion, superior signal-to-noise ratio and Wolfson-quality performance, the WM7210 and the WM7220 represent perfect solutions for a vast range of consumer applications. Given that we are now sampling our digital MEMS microphones with the world's leading consumer electronics manufacturers demonstrates the innovation, technology, expertise and support capabilities behind our solutions."
Availability
The WM7210 is available in a 4 mm x 3 mm x 1 mm thin package, priced at $1.83 in 1K volume, while the WM7220 is available in a 4.72 mm x 3.76 mm x 1.25 mm package, also priced at $1.83 in 1K volume.
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