Top and bottom port silicon MEMS microphones with matching frequency responses

October 19, 2012 // By Julien Happich
Wolfson Microelectronics has released the WM7121 and WM7132 high performance top and bottom port silicon analogue micro-electro-mechanical systems (MEMS) microphones with matching frequency responses.

With a high signal-to-noise ratio (SNR) of 65dB, ultra-low distortion and matching responses across the frequency band from 10Hz to 20kHz, the WM7121 and the WM7132 deliver superior HD Audio quality and highly authentic audio recordings for a wide variety of portable applications. As well as their matching frequency responses, the microphones also feature matching phase responses and matching sensitivity, making them suitable for stereo recording and much easier for designers to integrate into their systems. Both devices are also available with market-leading sensitivity tolerance of ±1dB.

The WM7121 and WM7132 both incorporate Wolfson's proprietary CMOS / MEMS membrane technology, offering high reliability and high performance in a miniature, low profile package. Both parts are designed to withstand the high temperatures associated with automated flow solder assembly processes, which can often damage conventional microphones, making them ideal for high volume manufacturing. The WM7121 top port package and WM7132 bottom port package are both available for sampling now.

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