Datasheet
Table Of Contents
- FEATURES
- APPLICATIONS
- DESCRIPTION
- DESCRIPTION (Continued)
- PIN ASSIGNMENTS
- ABSOLUTE MAXIMUM RATINGS
- PACKAGE THERMAL RATINGS
- SYSTEM THERMAL CHARACTERISTICS
- RECOMMENDED OPERATING CONDITIONS
- ELECTRICAL CHARACTERISTICS
- TYPICAL CHARACTERISTICS
- OVERVIEW
- HARDWARE RESET
- DIGITAL CONTROL SERIAL INTERFACE
- I2C CONTROL INTERFACE
- I2C BUS DEBUG IN A GLITCHED SYSTEM
- DIGITAL AUDIO DATA SERIAL INTERFACE
- RIGHT-JUSTIFIED MODE
- LEFT-JUSTIFIED MODE
- I2S MODE
- DSP MODE
- TDM DATA TRANSFER
- AUDIO DATA CONVERTERS
- AUDIO CLOCK GENERATION
- STEREO AUDIO ADC
- DIGITAL AUDIO PROCESSING FOR RECORD PATH
- AUTOMATIC GAIN CONTROL (AGC)
- STEREO AUDIO DAC
- DIGITAL AUDIO PROCESSING FOR PLAYBACK
- DIGITAL INTERPOLATION FILTER
- DELTA-SIGMA AUDIO DAC
- AUDIO DAC DIGITAL VOLUME CONTROL
- INCREASING DAC DYNAMIC RANGE
- ANALOG OUTPUT COMMON-MODE ADJUSTMENT
- AUDIO DAC POWER CONTROL
- AUDIO ANALOG INPUTS
- ANALOG INPUT BYPASS PATH FUNCTIONALITY
- ADC PGA SIGNAL BYPASS PATH FUNCTIONALITY
- INPUT IMPEDANCE AND VCM CONTROL
- MICBIAS GENERATION
- PASSIVE ANALOG BYPASS DURING POWER DOWN
- ANALOG FULLY DIFFERENTIAL LINE OUTPUT DRIVERS
- ANALOG HIGH-POWER OUTPUT DRIVERS
- SHORT-CIRCUIT OUTPUT PROTECTION
- JACK/HEADSET DETECTION
- CONTROL REGISTERS
- Output Stage Volume Controls
AUDIO DAC POWER CONTROL
AUDIO ANALOG INPUTS
Gain=0, –1.5, –3,..., –12dB,Mute
ToLeft ADCPGA
B0156-01
MIC1L/LINE1L
MIC1R/LINE1R
Gain=0, –1.5, –3,..., –12dB,Mute
Gain=0, –1.5, –3,..., –12dB,Mute
MIC2L/LINE2L/MICDET
TLV320AIC3101
www.ti.com
........................................................................................................................................ SLAS520D – FEBRUARY 2007 – REVISED DECEMBER 2008
Table 5. Appropriate Settings
CM SETTING RECOMMENDED AVDD, DRVDD RECOMMENDED DVDD
1.35 2.7 V – 3.6 V 1.525 V – 1.95 V
1.5 3 V – 3.6 V 1.65 V – 1.95 V
1.65 V 3.3 V – 3.6 V 1.8 V – 1.95 V
1.8 V 3.6 V 1.95 V
The stereo DAC can be fully powered up or down, and in addition, the analog circuitry in each DAC channel can
be powered up or down independently. This provides power savings when only a mono playback stream is
needed.
The TLV320AIC3101 includes six single-ended audio inputs. These pins connect through series resistors and
switches to the virtual ground terminals of two fully differential operational amplifiers (one per ADC/PGA
channel). By selecting to turn on only one set of switches per operational amplifier at a time, the inputs can be
effectively muxed to each ADC PGA channel.
By selecting to turn on multiple sets of switches per operational amplifier at a time, mixing can also be achieved.
Mixing of multiple inputs can easily lead to PGA outputs that exceed the range of the internal operational
amplifiers, resulting in saturation and clipping of the mixed output signal. Whenever mixing is being implemented,
the user should take adequate precautions to avoid such a saturation case from occurring. In general, the mixed
signal should not exceed 2 Vp-p (single-ended).
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 TLV320AIC3101 includes input level control on each of the individual inputs before they are mixed
or muxed into the ADC PGAs, with gain programmable from 0 dB to – 12 dB in 1.5-dB steps. Note that this input
level control is not intended to be a volume control, but instead used occasionally for level setting. Soft-stepping
of the input level control settings is implemented in this device, with the speed and functionality following the
settings used by the ADC PGA for soft-stepping.
Figure 29 shows the single-ended mixing configuration for the left-channel ADC PGA, which enables mixing of
the signals LINE1L, LINE2L, LINE1R, MIC3L, and MIC3R. The right-channel ADC PGA mix is similar, enabling
mixing of the signals LINE1R, LINE2R, LINE1L, MIC3L, and MIC3R.
Figure 29. Left-Channel, Single-Ended Analog Input Mixing Configuration
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