Datasheet > AS3435-EQFP

AS3435-EQFP

更新时间： 2024-10-31 01:13:27

品牌	Logo	应用领域
艾迈斯 - AMSCO		/
页数	文件大小	规格书
102页	1947K
描述
Integrated Active Noise Cancelling Solution with Bypass Feature

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AS3435-EQFP 数据手册

AS3415/AS3435

Integrated Active Noise Cancelling

Solution with Bypass Feature

The AS3415/35 are speaker drivers 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.

General Description

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 AS3415/35 can be

used in different configurations for best trade-off of noise

cancellation, required filtering functions and mechanical

designs.

The simpler feed-forward topology is used to effectively reduce

frequencies typically up to 2-3 kHz. The feed-back topology

with either 1 or 2 filtering stages has its strengths especially at

very low frequencies. The typical bandwidth for a feed-back

system is from 20Hz up to 1 kHz which is lower than the

feed-forward systems.

The filter loop for both systems 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 AS3415/35, Integrated Active Noise

Cancelling Solution with Bypass Feature are listed below:

Figure 1:

Added Value of Using AS3415/35

Benefits

All ANC Topologies

Features

Feed Forward, Feed Back and Hybrid

Integrated depletion mode transistors

Ultra flexible low power EQ circuit

No mechanical audio bypass switch

Music EQ functionality

ams Datasheet, Confidential: 2014-Jun-13 [v1-30]

AS3415/AS3435 – 1

12 3 4 5 6 7...102

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