AS3658F-BCTP datasheet(90/158 Pages) AMSCO

tên linh kiện	AS3658F-BCTP

Giải thích chi tiết về linh kiện	Power and Audio Management Unit for Portable Devices

PDF	158 Pages

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nhà sản xuất	AMSCO [ams AG]

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Revision 1v13

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AS3658

Data Sheet Confidential - Detail ed Descri ption- Audio Functi ons

Figure 39. AS3658 Microphone Recording and I2S I/O Playback (either I2S 1 or I2S 2/PCM)

Figure 40. AS3658 Recording of the Mixed output signal and parallel playback (either I2S 1 or I2S 2/PCM)

9.2

Common mode voltage generation of HP_CM, LINE_CM

The common mode voltage of the Headphone and Lineout is stored in the C_hpcm and C_linecm capacitor

(connected between HP_CM to VSS and LINE_CM to VSS). These capacitor are also responsible for the popless

startup, PSRR of the amplifiers and sense path of the GND cancellation circuit.

Startup and PSRR is defined by the value of the external capacitors. The RC limits the maximum achievable PSRR:

R=6M

Ω typ, C=0.1...1µF:

Table 88. common mode voltage, Audio start-up and PSRR

Capacitor value for C_hpcm and

C_linecm

Startup time (typ)

Maximum achievable PSRR

@ 1kHz (typ)

@ 100Hz (typ)

µF

msec

0.1

150

1500

AS3658F-BCTP bảng dữ liệu(PDF) 90 Page - ams AG