TLV320AIC3105_08 BURR-BROWN [Burr-Brown Corporation], TLV320AIC3105_08 Datasheet - Page 40

• Manufacturer Part Number: TLV320AIC3105_08
• Description: LOW-POWER STEREO AUDIO CODEC FOR PORTABLE AUDIO/TELEPHONY
• Manufacturer: BURR-BROWN [Burr-Brown Corporation]

TLV320AIC3105
SLAS513A – FEBRUARY 2007 – REVISED JULY 2007
40
ANALOG FULLY DIFFERENTIAL LINE OUTPUT DRIVERS
The TLV320AIC3105 has two fully differential line output drivers, each capable of driving a 10-k
load. The output stage design leading to the fully differential line output drivers is shown in
Figure
occurs, beyond that already provided by the PGA gain and the DAC digital volume control.
The LINE2L/R signals refer to the signals that travel through the analog input bypass path to the output stage.
The PGA_L/R signals refer to the outputs of the ADC PGA stages that are similarly passed around the ADC to
the output stage. Note that because both left- and right-channel signals are routed to all output drivers, a mono
mix of any of the stereo signals can easily be obtained by setting the volume controls of both left- and
right-channel signals to –6 dB and mixing them. Undesired signals can also be disconnected from the mix as
well through register control.
Figure 28. Architecture of the Output Stage Leading to the Fully Differential Line Output Drivers
29. This design includes extensive capability to adjust signal levels independently before any mixing
DAC_R3
DAC_R1
DAC_R1
DAC_L3
DAC_L1
DAC_L1
LINE2R
LINE2R
LINE2L
LINE2L
PGA_L
PGA_R
PGA_L
PGA_R
Controls,
Controls,
Volume
Volume
Stereo
Mixing
Mixing
Audio
DAC
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DAC_L
DAC_R
Gain = 0 dB to 9 dB,
Gain = 0 dB to 9 dB,
Mute
Mute
DAC_L1
DAC_L2
DAC_L3
DAC_R1
DAC_R2
DAC_R3
LEFT_LOP
LEFT_LOM
RIGHT_LOP
RIGHT_LOM
B0157-02
Figure 28
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differential
and