Infineon launches XENSIV MEMS microphone with analog interface for audio, active noise cancellation
An automotive-qualified MEMS (microelectromechanical systems) microphone from Infineon has an analogue interface for audio and active noise cancelation (ANC) systems. ANC ensures a quiet vehicle interior and provides passengers with a more moderate driving experience.
Furthermore, using ANC instead of passive damping methods reduces the vehicle weight, which benefits efficiency. For ANC systems with an analogue interface, Infineon is expanding its automotive microphone portfolio with the Xensiv IM68A130A MEMS microphone with a flat frequency response to frequencies below 10Hz. It builds on the launch of the company’s initial automotive-qualified digital MEMS microphone, the IM67D130A, and combines its automotive skill with its technical know-how in high-end MEMS microphones.
The IM68A130A has a flat frequency response, a stable phase response, and a low frequency roll-off of 10Hz. The signal-to-noise ratio of 68dB(A) and acoustic overload point of 130dB SPL improve speech performance, making it suitable for general-purpose microphones in any audio system.
It can also be used for beamforming and ANC, where microphones are placed in the cabin or at exterior locations to detect sounds in the cabin. An inverted sound wave is then generated through the audio speakers to reduce the sound level in the cabin.
Infineon’s new microphone is qualified to AEC-Q103-003. This helps reduce the effort and risk of failure in module and system qualification.
The product will be available for at least the typical lifecycle of a vehicle, enabling savings in design-in effort and the development of platforms. In addition, its operating temperature range up to +105˚C allows for flexible use in various environments inside and outside the vehicle.
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