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AS3412 Datasheet(PDF) 1 Page - ams AG |
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AS3412 Datasheet(HTML) 1 Page - ams AG |
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1 / 84 page  ams Datasheet Page 1 [v1-00] 2016-Apr-06 Document Feedback AS3412 Ultra Small ANC Speaker Driver The AS3412 is a speaker driver with Ambient Noise Cancelling function for headsets, headphones or ear pieces. They are intended to improve quality of e.g. music listening, a phone conversation etc. by reducing background ambient noise. The fully analog implementation allows the lowest power consumption, lowest system BOM cost and most natural received voice enhancement otherwise difficult to achieve with DSP implementations. The device is designed to be easily applied to existing architectures. An internal OTP-ROM can be optionally used to store the microphones gain calibration settings. The AS3412 can be used in different configurations for best trade-off in terms of noise cancellation, required filtering functions and mechanical designs. The AS3412 targeting feed-forward topology is used to effectively reduce frequencies typically up to 2-3 kHz. The filter loop for the system is determined by measurements, for each specific headset individually, and depends very much on mechanical designs. The gain and phase compensation filter network is implemented with cheap resistors and capacitors for lowest system costs. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of this device are listed below: Figure 1: Added Value of Using AS3412 Applications The devices are ideal for Ear Pieces, Headsets, Hands-Free Kits, Mobile Phones, and Voice Communicating Devices. Benefits Features • Low noise floor • Low noise amplifiers • Integrated music bypass switch • Depletion mode transistors for passive music bypass • Smallest ANC form factor • WL-CSP package (2.2x2.2mm, 0.4mm pitch) General Description |
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