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AS3412 Datasheet(PDF) 38 Page - ams-OSRAM AG

No. de pieza AS3412
Descripción Electrónicos  Ultra Small ANC Speaker Driver
PDF  85 Pages
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Fabricante Electrónico  AMSOSRAM [ams-OSRAM AG]
Página de inicio  https://ams-osram.com/
Logo AMSOSRAM - ams-OSRAM AG

AS3412 Datasheet(HTML) 38 Page - ams-OSRAM AG

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ams Datasheet
Page 37
[v1-00] 2016-Apr-06
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AS3412 − Detailed Description
Playback Only Mode
The active noise cancelling feature of the AS3412 can also be
disabled with the ANC/CSDA pin. The ANC/CSDA pin has to be
pulled high to enable the ANC function during startup (ANC
MODE). If the pin is connected to ground, the chip enters
playback only mode (PBO MODE) in which the ANC function is
disabled. The operating mode of the line input mute switch, as
well as the mixer input, can be defined in register PBO_MODE.
The microphone amplifier shuts down automatically, but it is
possible to control the operational amplifiers in this mode
separately. Typically only the line input amplifiers and the
headphone amplifier are enabled in the playback only mode. If
this function is not desired you just need to pull the pin high
through a 22kΩ resistor.
Figure 49:
Playback Only Mode Timing Diagram
Playback Only Mode Timing Diagram: The diagram shows the necessary voltages and timings for different
operation modes in Playback Only Mode.
ANC/CSDA Pin
ANC ON
Playback Only Mode
ANC ON
200-400ms
200-400ms
>65% VBAT
<35% VBAT
Operation Mode



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