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AS3543 数据表(PDF) 21 Page - ams AG

部件名 AS3543
功能描述  High End Stereo Audio Codec wi th System PMU
PDF  92 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  AMSCO [ams AG]
网页  http://www.ams.com
标志 AMSCO - ams AG

AS3543 数据表(HTML) 21 Page - ams AG

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www.austriamicrosystems.com
Revision 1.11
20 - 91
AS3543 3v2
Data Sheet - D e t a i l e d D e s c r i p t i o n - A u d i o F u n c t i o n s
8.3.4
Parameter
AVDD17=1.7, AVDD27=2.7, TA= 25
o
C, unless otherwise mentioned
8.3.5
Register Description
8.4
Headphone Output
The headphone output is designed to provide the audio signal with 2x40mW @ 16
Ω or 2x20mW @32Ω, which are typ-
ical values for headphones.
This AFE has a combined output stage for headphone and line output with an independent gain regulation for left and
right channel with 32 steps @ 1.5dB each. The gain can be set from -40.5dB to +6dB.
Figure 6. Headphone Output
Table 11. Line Output Parameter
Symbol
Parameter
Condition
Min
Typ
Max
Unit
RL_LO
Load Impedance
(Stereo Mode)
line inputs nominally have 10k
5
k
CL_LO
Load Capacitance
(Stereo Mode)
100
pF
ALO
Programmable Gain
-40.5
+6
dB
Gain Steps
discrete logarithmic gain steps
1.5
dB
Gain Step Accuracy
±0.25
dB
ALOMUTE
Mute Attenuation
100
dB
Table 12. Line Output Related Register
Name
Base
Offset
Description
OUT_R
2-wire serial
00h
Right Line Output volume settings, MUX control
OUT_L
2-wire serial
01h
Left Line Output volume settings
AudioSet2
2-wire serial
15h
Auto fading timing settings
AudioSet3
2-wire serial
16h
Enable/disable mixer input



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