AS3525-A/-B C22O22
Data Sheet, Confidential
7.4.9
Audio Line Inputs (2x)
7.4.9.1 General
The chip features includes two identical line inputs. The blocks can work in mono differential, 2x mono single ended or in stereo single ended mode.
The volume control has an independent gain regulation for left and right channel with 32 steps @ 1.5dB each. The gain can be set from –34.5dB to
+12dB. The stage is set to mute by default. If the line input is not enabled, the volume settings are set to their default values. Changing the volume
and mute control can only be done after enabling the input.
Figure 53 Line Inputs
Stereo Mode
Mono Single Ended Mode
Mono Differential Mode
7.4.9.2 Parameter
Figure 54 Line Input Parameter
Symbol
A0
Parameter
Notes
Min
Typ
Max Unit
Gain
programmable gain
-34.5
12
dB
dB
Gain Step-Size
Input Resistance
1.5
49
Ax
RinLINE
Mute
kOhm
kOhm
dB
Min Gain, single ended stereo
100
SNR
Signal to Noise Ratio
Mute Attenuation
90
120
dB
BVDD = 3.3V, TA= 25oC, fs=48kHz unless otherwise mentioned
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