MEMs microphones enhance acoustic performance

28th July 2021
Mick Elliott

Three MEMS microphones have been introduced by TDK as part of the SmartSound family of products for mobile, IoT, and other consumer devices.

They are in stock at distributgor Digi-Key.

These high-performance microphones push the boundaries of microphone acoustic performance, providing advanced feature sets with very low power in small package footprints.

The SmartSound family of MEMS microphones from TDK are designed for a multitude of applications in a variety of dynamic environments.

TDK's high acoustic overload point (AOP), high signal-to-noise ratio (SNR), and wide dynamic range microphones are ideal for environments that shift from very quiet to very loud, such as far-field voice pickup barge-in for smart speaker applications.

The T5919 is a multi-mode, low noise digital MEMS microphone in a small 3.5 mm x 2.65 mm x 0.98 mm bottom port package. The PIF filter is embedded in the microphone package, providing protection against particles and moisture.

The T5919 includes multiple modes of operation: high quality, low-power (always on), and sleep. This microphone boasts high SNR in all operational modes.

It maintains 135 dB sound pressure level (SPL) AOP in high-quality mode and 120 dB SPL AOP in low-power mode.

The T4086 analogue microphone is designed to achieve high SNR and AOP at low power in a tiny 2.75 mm x 1.85 mm x 0.9 mm bottom port package to support very space constrained applications/devices.

The low power T3903 enables the transition of microphones from analogue output to digital output to support always on applications in smartphones, tablets, remote controls, smart TVs, Bluetooth headsets, and digital still/video cameras. It is a multi-mode, low noise, bottom ported MEMS microphone with -37 dBFS sensitivity, 66 dBA SNR, and 133 dB AOP in a 3.5 mm x 2.65 mm x 0.98 mm package.

The MEMs microphones are compatible with Sn/Pb and Pb-free solder processes and RoHS/WEEE compliant

Applications cover smartphone, microphone arrays, tablets, cameras, Bluetooth headsets, notebook PCs and security and surveillance

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