TAS3218IPZP datasheet(36/78 Pages) TI

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Coefficient

Representation

8-Bit Headroom

and 16-Bit Noise

Input 24-Bit Data

Multiplier

Output

D23 D22 ------------ D1 D0

27–23

22 --------------- 0

D23 D22 ------------ D1 D0

0 ... 0

47–40

39 ------------------16

15–0

0 ... 0

Scaling Headroom

Data (24-Bits)

75–71

70–63

62–39

38–31

30–0

DAP Data Path Data Representation

Fractional Noise

48-Bit Clipping

POS48 =

0x7F_F

FFF_FFFF

_FF

NEG48 =

0x80_0

000_0000

_00

32-Bit Clipping

POS40 =

0xXX_

7FFF_FFFF

_XX

NEG40 =

8000_0000

_XX

xXX_

28-Bit Clipping

POS20 =

0xXXXXX_

7FFF_FFF

NEG20 =

0xXXXXX_

8000_000

TAS3218

SLES235 – JULY 2008 ....................................................................................................................................................................................................... www.ti.com

Figure 26. DSP Data Path Data Representation

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