TAS5548 datasheet(19/120 Pages) TI

19 / 120 page

Coefficient

Digit 8

Coefficient

Digit 7

Coefficient

Digit 6

Coefficient

Digit 5

Coefficient

Digit 4

Coefficient

Digit 3

Coefficient

Digit 2

Coefficient

Digit 1

Fraction

Digit 5

Sign

Bit

Fraction

Digit 6

Fraction

Digit 4

Fraction

Digit 3

Fraction

Digit 2

Fraction

Digit 1

Integer

Digit 1

u = unused or don’t care bits

Digit = hexadecimal digit

M0009-01

(1 or 0) y 23 + (1 or 0) y 22 + … + (1 or 0) y 20 + (1 or 0) y 2−1 + … + (1 or 0) y 2−4 + … + (1 or 0) y 2−23

23 Bit

22 Bit

20 Bit

2−1 Bit

2−4 Bit

2−23 Bit

M0008-01

2−23 Bit

S_xxxx.xxxx_xxxx_xxxx_xxxx_xxxx_xxx

2−4 Bit

2−1 Bit

20 Bit

Sign Bit

23 Bit

M0007-01

TAS5548

www.ti.com

SLES270 – NOVEMBER 2012

3.2.2

28-Bit 5.23 Number Format

All mixer gain coefficients are 28-bit coefficients using a 5.23 number format. Numbers formatted as 5.23

numbers have 5 bits to the left of the binary point and 23 bits to the right of the binary point. This is shown

in Figure 3-7.

Figure 3-7. 5.23 Format

The decimal value of a 5.23 format number can be found by following the weighting shown in Figure 3-8. If

the most significant bit is logic 0, the number is a positive number, and the weighting shown yields the

correct number. If the most significant bit is a logic 1, then the number is a negative number. In this case,

every bit must be inverted, a 1 added to the result, and then the weighting shown in Figure 3-8 applied to

obtain the magnitude of the negative number.

Figure 3-8. Conversion Weighting Factors—5.23 Format to Floating Point

Gain coefficients, entered via the I2C bus, must be entered as 32-bit binary numbers. The format of the

32-bit number (4-byte or 8-digit hexadecimal number) is shown in Figure 3-9.

Figure 3-9. Alignment of 5.23 Coefficient in 32-Bit I2C Word

TAS5548 DAP Architecture

Submit Documentation Feedback

Product Folder Links: TAS5548

TAS5548 Datasheet(PDF) 19 Page - Texas Instruments

TAS5548 Datasheet(HTML) 19 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL