AS3412 datasheet(75/84 Pages) AMSCO

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ams Datasheet

Page 75

[v1-00] 2016-Apr-06

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AS3412 − Application Information

External Components

This chapter provides detailed information concerning

recommended external components such as capacitors and

resistors.

Figure 92:

External Components

External Components: This table provides detailed information concerning the recommended external

components to operate AS3412.

Symbol

Parameter

Temp.

Characteristic

Min. Rated

Voltage

Max.

Tolerance

Min. Nom.

Capacitance

Capacitors

C1, CVBAT

Input Capacitor

Y5R; X5R

±20%

4.7μF

C3, CFLY

VNEG charge pump flying

capacitor

Y5R; X5R

±20%

1μF

C4, C10,

CACR, CACR

AC coupling capacitor

Y5R; X5R

±10%

10μF

C5, CVNEG

Output Capacitor

Y5R; X5R

±20%

10μF

C8, C9

AC coupling input

capacitor

Y5R; X5R

±20%

4.7μF

C6, CMICS

Output Capacitor

Y5R; X5R

±20%

10μF

Output Capacitor (optional

component)

Y5R; X5R

±20%

22μF

C2, C11,

CMICL, CMICR

AC coupling capacitor;

value depends on ANC

filter design

Y5R; X5R

±10%

CFILTER

ANC filter related

capacitors

Y5R; X5R

±10%

Resistors

R1, R6

Bias current resistor for

microphones

2.2kΩ

R4, R5

Pull down resistors to

avoid humming noise

150Ω

R3, R7

Microphone input high

pass filter; value depends

on ANC filter design

Microphone supply filter

resistor (optional

component)

10%

220Ω

RFILTER

ANC filter related resistors

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