Datasheet
Interp.
Filter A
BiQuad
C
BiQuad
B
BiQuad
A
to
Modulator
Digital
Volume
Ctrl
from
Interface
´
TLV320AIC3120
www.ti.com
SLAS653A –FEBRUARY 2010–REVISED MAY 2012
DAC power up is controlled by writing to page 0 / register 63, bit D7 for the mono channel. The mono-
channel DAC clipping flag is provided as a read-only bit on page 0 / register 39, bit D7.
5.6.1.1 DAC Processing Blocks
The TLV320AIC3120 implements signal-processing capabilities and interpolation filtering via processing
blocks. These fixed processing blocks give users the choice of how much and what type of signal
processing they may use and which interpolation filter is applied.
The choices among these processing blocks allow the system designer to balance power conservation
and signal-processing flexibility. Table 5-20 gives an overview of all available processing blocks of the
DAC channel and their properties. The resource-class column gives an approximate indication of power
consumption for the digital (DVDD) supply; however, based on the out-of-band noise spectrum, the analog
power consumption of the drivers (HPVDD) may differ.
The signal processing blocks available are:
• First-order IIR
• Scalable number of biquad filters
The processing blocks are tuned for common cases and can achieve high image rejection or low group
delay in combination with various signal processing effects such as audio effects and frequency shaping.
The available first-order IIR and biquad filters have fully user-programmable coefficients.
Table 5-20. Overview – Mono DAC Predefined Processing Blocks
Processing First-Order Number of Resource
Interpolation Filter DRC
Block No. IIR Available Biquads Class
PRB_P4 A No 3 No 4
PRB_P5 A Yes 6 Yes 6
PRB_P6 A Yes 6 No 6
PRB_P12 B Yes 0 No 3
PRB_P13 B No 4 Yes 4
PRB_P14 B No 4 No 4
PRB_P15 B Yes 6 Yes 6
PRB_P16 B Yes 6 No 4
PRB_P20 C Yes 0 No 2
PRB_P21 C Yes 4 Yes 3
PRB_P22 C Yes 4 No 2
PRB_P25 A Yes 5 Yes 12
5.6.1.2 DAC Processing Blocks – Signal Chain Details
5.6.1.2.1 Three Biquads, Filter A
Figure 5-19. Signal Chain for PRB_P4
Copyright © 2010–2012, Texas Instruments Incorporated APPLICATION INFORMATION 43
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