參數(shù)資料
型號(hào): TAS5711PHPR
廠商: Texas Instruments
文件頁(yè)數(shù): 31/66頁(yè)
文件大?。?/td> 0K
描述: IC AMP AUD DGTL 20W 2CH 48HTQFP
標(biāo)準(zhǔn)包裝: 1
類型: D 類
輸出類型: 2 通道(立體聲,2.1)或 4 通道(四路)
在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量: 21W x 2 @ 8 歐姆
電源電壓: 8 V ~ 26 V
特點(diǎn): 消除爆音,數(shù)字輸入,I²C,I²S,靜音,短路和熱保護(hù),關(guān)機(jī),音量控制
安裝類型: 表面貼裝
供應(yīng)商設(shè)備封裝: 48-HTQFP(7x7)
封裝/外殼: 48-TQFP 裸露焊盤
包裝: 標(biāo)準(zhǔn)包裝
產(chǎn)品目錄頁(yè)面: 860 (CN2011-ZH PDF)
其它名稱: 296-25564-6
(1or0)
2 +
1
(1or0)
2 +(1or0)
2
+.......(1or0)
2
+.......(1or0)
2
0
–1
–4
–23
2 Bit
1
2 Bit
0
2
Bit
–1
2
Bit
–4
2
Bit
–23
M0126-01
u
Coefficient
Digit8
u u u
u u S x
Coefficient
Digit7
x.
x
Coefficient
Digit6
x
Coefficient
Digit5
x
Coefficient
Digit4
x
Coefficient
Digit3
x
Coefficient
Digit2
x
Coefficient
Digit1
Fraction
Digit5
Fraction
Digit4
Fraction
Digit3
Fraction
Digit2
Fraction
Digit1
Integer
Digit1
Sign
Bit
Fraction
Digit6
u=unusedordon’tcarebits
Digit=hexadecimaldigit
M0127-01
0
www.ti.com
SLOS600A – DECEMBER 2009 – REVISED AUGUST 2010
The decimal value of a 3.23 format number can be found by following the weighting shown in Figure 54. 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 55 applied to obtain the magnitude
of the negative number.
Figure 55. Conversion Weighting Factors—3.23 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 56
Figure 56. Alignment of 3.23 Coefficient in 32-Bit I2C Word
Table 2. Sample Calculation for 3.23 Format
dB
Linear
Decimal
Hex (3.23 Format)
0
1
8,388,608
0080 0000
5
1.7782794
14,917,288
00E3 9EA8
–5
0.5623413
4,717,260
0047 FACC
X
L = 10(X/20)
D = 8,388,608 × L
H = dec2hex (D, 8)
Table 3. Sample Calculation for 9.17 Format
dB
Linear
Decimal
Hex (9.17 Format)
0
1
131,072
2 0000
5
1.77
231,997
3 8A3D
–5
0.56
73,400
1 1EB8
X
L = 10(X/20)
D = 131,072 × L
H = dec2hex (D, 8)
Copyright 2009–2010, Texas Instruments Incorporated
37
Product Folder Link(s): TAS5711
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