Datasheet

Noise Floor With No
Additional Precision
Maximum Signal Amplitude
Ideal Input Possible Outputs Desired Output
Filter
Operation
Signal
Bits
Input
Overflow
Reduced
SNR
Signal
Output
Noise Floor as a Result
of Additional Precision
Signal
Bits
Output
Values Retained by
Overflow Bits
M0010-01
Gain Coefficient
48
SDIN1-L
28
48
Gain Coefficient
48
28
48
SUM
w
w
w
Gain Coefficient
48
28
48
M0011-01
SDIN1-R
SDIN4-R
TAS5508C
SLES257–SEPTEMBER 2010 www.ti.com
Figure 2-10. TAS5508C Digital Audio Processing
2.4 Input Crossbar Mixer
The TAS5508C has a full 8×8 input crossbar mixer. This mixer permits each signal processing channel
input to be any ratio of any of the eight input channels, as shown in Figure 2-11. The control parameters
for the input crossbar mixer are programmable via the I
2
C interface. See the Input Mixer Registers
(0x41–0x48, Channels 1–8), Section 7.16, for more information.
Figure 2-11. Input Crossbar Mixer
2.5 Biquad Filters
For 32-kHz to 96-kHz data, the TAS5508C provides 56 biquads across the eight channels (seven per
channel).
For 176.4-kHz and 192-kHz data, the TAS5508C has 21 biquads across the three channels (seven per
channel). All of the biquad filters are second-order direct form I structure.
28 Description Copyright © 2010, Texas Instruments Incorporated
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