TLV320AIC3204 Datasheet, PDF (60/159 Pages) Texas Instruments – Ultra Low Power Stereo Audio Codec

TLV320AIC3204
Ultra Low Power Stereo Audio Codec
SLOS602A – SEPTEMBER 2008 – REVISED OCTOBER 2008
www.ti.com
5.11 DAC
The TLV320AIC3204 includes a stereo audio DAC supporting data rates from 8kHz to 192kHz. Each
channel of the stereo audio DAC consists of a signal-processing engine with fixed processing blocks, a
digital interpolation filter, multi-bit digital delta-sigma modulator, and an analog reconstruction filter. The
DAC is designed to provide enhanced performance at low sampling rates through increased oversampling
and image filtering, thereby keeping quantization noise generated within the delta-sigma modulator and
signal images strongly suppressed within the audio band to beyond 20kHz. To handle multiple input rates
and optimize power dissipation and performance, the TLV320AIC3204 allows the system designer to
program the oversampling rates over a wide range from 1 to 1024 by configuring the Page 0, Reg 13, and
Reg 14. The system designer can choose higher oversampling ratios for lower input data rates and lower
oversampling ratios for higher input data rates.
The TLV320AIC3204 DAC channel includes a built-in digital interpolation filter to generate oversampled
data for the sigma delta modulator. The interpolation filter can be chosen from three different types
depending on required frequency response, group delay and sampling rate.
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Application Information
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