محصولات صوتی میکروفون

Product Attributes

Introduction

The device is designed for applications where low self-noise (high SNR), wide dynamic range, low distortions and a high acoustic overload point are required. The low cut-off frequency (LFRO) makes it a well suited device for active noise cancelling (ANC) applications. Infineon's MEMS technology is based on a miniaturized microphone design and results in high linearity of the output signal within a high dynamic range. With its low equivalent noise floor the microphone is no longer the limiting factor in the audio signal chain and enables higher performance of voice recognition algorithms. The digital microphone ASIC contains a microphone specifc THD compensation algorithm for optimal performance at high sound pressure levels (SPL), an extremely low-noise preamplifier and a high-performance sigma-delta analog-to-digital converter (ADC). The tight manufacturing tolerance, combined with the fact that each device is calibrated with an advanced Infineon calibration algorithm, results in small sensitivity and phase matching tolerances. This makes it well suited for beam forming arrays and multi-microphone applications.

Features

• Automotive qualification
• Flat frequency response down to 7 Hz for best ANC performance
• Close sensitivity and phase matching for optimum beam forming
• Extended availability to match automotive design cycles
• Digital PDM output
• Active THD compensation to reduce distortions at high SPL levels
• Small 3.5×2.65×0.98 mm³ surface-mount package
• Environmental robust up to IP57

Applications

• Active noise cancellation / Road noise cancellation (ANC/RNC)
• Hands free calling / Voice control
• Emergency call
• Siren detection
• Road condition detection