Datasheet

ADC
ADC
AGC
AGC
IN2L(P)
IN1L(P)
IN3R(M)
IN2R(P)
+
–
+
–
+
–
IN2L(P)
IN3L(M)
IN1R(M)
IN2R(P)
IN3R(M)
IN1L(P)
IN1R(M)
+
IN2R(P)
IN3R(M)
IN1L(P)
IN2L(P)
IN3L(M)
IN1L(P)
IN1R(M)
IN1L(P)
IN2L(P)
IN3L(M)
IN1R(M)
IN2R(P)
IN3R(M)
IN3L(M)
IN1R(M)
+
+
+
–
–
PGA
0/+40dB
0.5dBSteps
PGA
0/+40dB
0.5dBSteps
All coarse stageattenuations aresetto 0dB, –6dB,orOffby registersetting.
The defaultis allthe switches areoffat startup.
+
–
+
–
+
–
TLV320ADC3101
www.ti.com ...................................................................................................................................... SLAS553A – NOVEMBER 2008 – REVISED SEPTEMBER 2009
In most mixing applications, there is also a general need to adjust the levels of the individual signals being
mixed. For example, if a soft signal and a large signal are to be mixed and played together, the soft signal
generally should be amplified to a level comparable to the large signal before mixing. In order to accommodate
this need, the TLV320ADC3101 includes input level control on each of the individual inputs before they are
mixed or multiplexed into the ADC PGAs, with programmable attenuation at 0 dB, – 6 dB, or off. Note that this
input-level control is not intended to be a volume control, but instead used for coarse level setting. Finer
soft-stepping of the input level is implemented in this device by the ADC PGA.
Figure 33. TLV320ADC3101 Available Audio Input Path Configurations
Table 4. TLV320ADC3101 Audio Signals
Audio Signals Available to
Audio Signals Available to Left ADC
Right ADC
Single-Ended Inputs Differential Inputs Single-Ended Inputs Differential Inputs
IN1L(P) IN1L(P), IN1R(M) IN1R(M) IN1L(P), IN1R(M)
IN2L(P) IN2L(P), IN3L(M) IN2R(P) IN2R(P), IN3R(M)
IN3L(M) IN2R(P), IN3R(M) IN3R(M) IN2L(P), IN3L(M)
IN1R(M) IN1L(P)
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