Datasheet

ANALOG FULLY DIFFERENTIAL LINE OUTPUT DRIVERS
PGA_L
PGA_L
PGA_R
PGA_R
DAC_L1
DAC_L1
DAC_R1
DAC_R1
DAC_L3
LEFT_LOP
LEFT_LOM
B0157-01
DAC_R3
RIGHT_LOP
RIGHT_LOM
DAC_L
DAC_L1
DAC_L2
DAC_L3
DAC_R
DAC_R1
DAC_R2
DAC_R3
Stereo
Audio
DAC
Volume
Controls,
Mixing
Volume
Controls,
Mixing
Gain=0dBto9dB,
Mute
Gain=0dBto9dB,
Mute
TLV320AIC3101
SLAS520D – FEBRUARY 2007 – REVISED DECEMBER 2008 ........................................................................................................................................ www.ti.com
The TLV320AIC3101 has two fully differential line output drivers, each capable of driving a 10-k Ω differential
load. The output stage design leading to the fully differential line output drivers is shown in Figure 31 and
Figure 32 . This design includes extensive capability to adjust signal levels independently before any mixing
occurs, beyond that already provided by the PGA gain and the DAC digital volume control.
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 31. Architecture of the Output Stage Leading to the Fully Differential Line Output Drivers
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Product Folder Link(s): TLV320AIC3101