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4.12 High Power Outputs Tab
The tab shown in
Figure
outputs. Each output has a mixer to mix the LINE2L, LINE2R, PGA_L, PGA_R, DAC_L, and DAC_R
signals, assuming that the DACs are not routed directly to the high-power outputs (see
At the left of each output strip is a Powered Up button that controls whether or not the corresponding
output is powered up. The When Powered Down button allows the outputs to be placed in a 3-state
output mode or driven weakly to the output common-mode voltage.
The HPxCOM outputs (HPLCOM and HPRCOM) can be used as independent output channels or can be
used as complementary signals to the HPLOUT and HPROUT outputs. In these complementary
configurations, the HPxCOM outputs can be selected as Differential of HPxOUT signals to the
corresponding outputs or may be set to be a common-mode voltage (Constant VCM Out). When used in
these configurations, the Powered Up button for the HPxCOM output is disabled, as the power mode for
that output tracks the power status of the HPL or HPR output that the COM output is tracking.
The HPRCOM Config selector allows a couple of additional options compared to the HPLCOM Config
selector. Differential of HPLCOM allows the HPRCOM to be the complementary signal of HPLCOM for
driving a differential load between the HPxCOM outputs. The selector also allows Ext.
Feedback/HPLCOM constant VCM as an option. This option is used when the high-power outputs are
configured for Capless output drive, where HPLCOM is configured as Constant VCM Out. The feedback
option provides feedback to the output and lowers the output impedance of HPLCOM.
At the right side of the output strip is a master volume knob for that output, which allows the output
amplifier gain to be muted or set from 0 dB to 9 dB in 1-dB steps.
SLAU219A – August 2007 – Revised January 2014
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26, contains four horizontal groupings of controls, one for each of the high-power
Figure 26. High-Power Outputs Tab
Copyright © 2007–2014, Texas Instruments Incorporated
TLV320AIC3101EVM Software
TLV320AIC3101EVM and TLV320AIC3101EVM-PDK
Section
4.11).
31
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