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ALC5640 View Datasheet(PDF) - Realtek Semiconductor

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ALC5640 Datasheet PDF : 150 Pages
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7.8. Analog Audio Output Port
The ALC5640 supports four type output ports:
ALC5640-VB
Datasheet
SPO_L/R_P/N
The speaker output of ALC5640 is a stereo BTL output with Class-D type amplifier (Shown as Figure
14.).
The power of speaker amplifier is an individual power pin and higher than AVDD. So the input and
output of speaker amplifier has a gain ratio to enlarge or reduce the income analog signal. The gain
ratio setting can be controlled by fbgain_clsd (MX-8D[15:12]).
The input source of the speaker output port can be selected from analog input, SPKVOL, DAC output
by setting MX-48/49.
The front stage of speaker output has gain control and volume control. For gain control, the range is
from 0dB to -9dB and controlled by MX-46/47. For volume control, the range is from +12dB to
-46.5dB with 1.5dB/step controlled by MX-01.
The pow_spo_voll (MX-66[15]) and pow_spo_volr (MX-66[14]) can be used to power on/off
SPKVOLL and SPKVOLR. The pow_clsd (MX-61[0]) can be used to power on/off SPO_L/R_P/N.
Analog
Modulation
LP
Gate Drive
SPKVDDL
SPOLP
SPKGND
Analog
Modulation
LN
Gate Drive
SPKVDDL
SPOLN
SPKGND
Analog
Modulation
RP
Gate Drive
SPKVDDR
SPORP
SPKGND
Analog
Modulation
LN
Gate Drive
SPKVDDR
SPORN
SPKGND
Figure 17. Speaker Output Mode Stereo Mode
Multi-Channel Audio Hub/CODEC and SounzRealTM
29
Digital Sound Effect for Mobile Devices
Rev. 0.91
 

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