AS3435 datasheet(21/102 Pages) AMSCO

Il numero della parte	AS3435

Spiegazioni elettronici	Integrated Active Noise Cancelling Solution with Bypass Feature

PDF	102 Pages

Scroll/Zoom	100%

Produttore elettronici	AMSCO [ams AG]

Homepage	http://www.ams.com

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21 / 102 page

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

AS3415/AS3435 – 21

Detaile d Desc rip t ion

Input Capacitor Selection

The microphone preamplifier needs a bias resistor (RBias) per

channel as well as DC blocking capacitors (CMIC). The capacitors

CAC are DC blocking capacitors to avoid DC amplification of the

non-inverting microphone preamplifier. This capacitor has an

influence on the frequency response because the internal

feedback resistors create a high pass filter. The typical

application circuit is shown in Figure 20 with all necessary

components.

Figure 20:

Microphone Capacitor Selection Circuit

Microphone Capacitor Selection Circuit: This diagram shows a typical microphone application circuit with all

necessary components to operate the amplifier.

The corner frequency of this high pass filter is defined with the

capacitor CAC and the gain of the headphone amplifier.

Figure 21 shows an overview of typical cut-off frequencies with

different microphone gain settings.

AS3435 Scheda tecnica(PDF) 21 Page - ams AG