Datasheet

Program Description
3-19
Operation
Figure 3−9. Audio Screen With AGC On
3.5.4.3 DAC Section
Like the ADC section, the TSC2100 audio DAC can be powered on or off. The
stereo audio volumes can be controlled by the left (L) and right (R) volume
control slides, in three different ways, selectable through setting the master
volume controller: 1) independent, 2) right channel controlled, or 3) left
channel controlled.
Like the audio ADC’s gain controls the DAC’s PGA gain can be changed in soft
stepping either 0.5-dB per one sample, or 0.5-dB per 2 samples.
The audio DACs output swing range can be set from the list in the Output
Peak-to-Peak Range pulldown. Refer to the TSC2100 data sheet to find out
the range. Note that the output peak-to-peak range is related to the analog
driver power supply voltage.
By checking the Headphone Amp Enable box, the amp is enabled, which can
directly be connected to a 16-Ω load. Otherwise, the headphone driver is
bypassed and the device can have a load of 10 kΩ.
By checking the Power Up Virtual GND box, the virtual ground for the
headphone output is powered up.