Datasheet

TAS5508C
www.ti.com SLES257–SEPTEMBER 2010
Table 2-2. TAS5508C Audio Processing Feature Sets
32 kHz–96 kHz 32 kHz–96 kHz 176.4- and 192-kHz
FEATURE
8-CHANNEL FEATURE SET 6 + 2 LINEOUT FEATURE SET FEATURE SET
Signal-processing channels 8 6 + 2 3
Pass-through channels N/A 5
Master volume 1 for 8 channels 1 for 6 channels 1 for 3 channels
Individual channel volume
8 3
controls
Four bass and treble tone controls Four bass and treble tone controls
Two bass and treble tone
with ±18-dB range, programmable with ±18-dB range, programmable
controls with ±18-dB range,
corner frequencies, and second- corner frequencies, and second-
programmable corner
Bass and treble tone order slopes order slopes
frequencies, and second-order
controls L, R, and C (Ch1, 2, and 7) L, R, and C (Ch1, 2, and 7)
slopes
LS, RS (Ch3 and 4) LS, RS (Ch3 and 4)
L and R (Ch1 and 2)
LBS, RBS (Ch5 and 6) Sub (Ch8)
Sub (Ch8)
Sub (Ch8) Line L and R (Ch5 and 6)
Biquads 56 21
Dynamic range DRC1 for seven satellites and DRC1 for five satellites and DRC2 DRC1 for two satellites and
compressors DRC2 for sub for sub (Ch5 and 6 uncompressed) DRC2 for sub
Each of the three signal-
processing channels or the five
pass-though channel inputs can
Each of the eight signal-processing channel inputs can be any ratio of the be any ratio of the eight input
Input/output mapping/
eight input channels. channels.
mixing
Each of the eight outputs can be any ratio of any two processed channels. Each of the eight outputs can be
any ratio of any of the three
processed channels or five
bypass channels.
DC-blocking filters
(implemented in PWM Eight channels
section)
Digital de-emphasis
Eight channels for 32 kHz, Six channels for 32 kHz, 44.1 kHz,
(implemented in PWM N/A
44.1 kHz, and 48 kHz and 48 kHz
section)
Loudness Eight channels Six channels Three channels
Number of coefficient sets
Three additional coefficient sets can be stored in memory.
stored
2.3 TAS5508C DAP Architecture
2.3.1 TAS5508C DAP Architecture Diagrams
Figure 2-1 shows the TAS5508C DAP architecture for Fs = 96 kHz. Note the TAS5508C bass
management architecture shown in channels 1, 2, 7, and 8. Note that the I
2
C registers are shown to help
the designer configure the TAS5508C.
Figure 2-2 shows the TAS5508C architecture for Fs = 176.4 kHz or Fs = 192 kHz. Note that only channels
1, 2, and 8 contain all the features. Channels 3–7 are pass-through except for master volume control.
Figure 2-3 shows TAS5508C detailed channel processing. The output mixer is 8×2 for channels 1–6 and
8×3 for channels 7 and 8.
Copyright © 2010, Texas Instruments Incorporated Description 21
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