Datasheet

u
Coefficient
Digit 16
u
u u u u u u
Coefficient
Digit 15
u
u u u
Coefficient
Digit 14
u
u u u
Coefficient
Digit 13
S
x x x
Coefficient
Digit 12
x
x x x
Coefficient
Digit 11
x
x x x
Coefficient
Digit 10
x
x x x
Coefficient
Digit 9
Word 1
(Most-
Significant
Word)
Integer
Digit 3
Integer
Digit 4
(Bits 2
11
− 2
9
)
Integer
Digit 2
Integer
Digit 1
Sign
Bit
x
Coefficient
Digit 8
x
x x x x x x
Coefficient
Digit 7
x.
x x x
Coefficient
Digit 6
x
x x x
Coefficient
Digit 5
x
x x x
Coefficient
Digit 4
x
x x x
Coefficient
Digit 3
x
x x x
Coefficient
Digit 2
x
x x x
Coefficient
Digit 1
Word 2
(Least-
Significant
Word)
Fraction
Digit 5
Integer
Digit 4
(Bit 2
8
)
0
Fraction
Digit 6
Fraction
Digit 4
Fraction
Digit 3
Fraction
Digit 2
Fraction
Digit 1
Integer
Digit 6
Integer
Digit 5
u = unused or don’t care bits
Digit = hexadecimal digit
M0009-02
TAS5508C
www.ti.com SLES257–SEPTEMBER 2010
Figure 2-9. Alignment of 25.23 Coefficient in Two 32-Bit I
2
C Words
2.3.2.3 TAS5508C Audio Processing
The TAS5508C digital audio processing is designed so that noise produced by filter operations is
maintained below the smallest signal amplitude of interest, as shown in Figure 2-10. The TAS5508C
achieves this low noise level by increasing the precision of the signal representation substantially above
the number of bits that are absolutely necessary to represent the input signal.
Similarly, the TAS5508C carries additional precision in the form of overflow bits to permit the value of
intermediate calculations to exceed the input precision without clipping. The TAS5508C advanced digital
audio processor achieves both of these important performance capabilities by using a high-performance
digital audio processing architecture with a 48-bit data path, 28-bit filter coefficients, and a 76-bit
accumulator.
Copyright © 2010, Texas Instruments Incorporated Description 27
Submit Documentation Feedback
Product Folder Link(s): TAS5508C