AS3415 datasheet(21/102 Pages) AMSCO

No. de pieza	AS3415

Descripción Electrónicos	Integrated Active Noise Cancelling Solution with Bypass Feature

PDF	102 Pages

Scroll/Zoom	100%

Fabricante Electrónico	AMSCO [ams AG]

Página de inicio	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.

AS3415 Datasheet(PDF) 21 Page - ams AG