參數(shù)資料
型號: TPA2008D2PWPR
廠商: TEXAS INSTRUMENTS INC
元件分類: 音頻控制
英文描述: 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24
封裝: GREEN, PLASTIC, HTSSOP-24
文件頁數(shù): 23/26頁
文件大?。?/td> 691K
代理商: TPA2008D2PWPR
www.ti.com
TPA2008D2
SLOS413C – JULY 2003 – REVISED MAY 2004
Table 1. TYPICAL DC VOLUME CONTROL
VOLTAGE ON VOLUME PIN
TYPICAL GAIN OF AMPLIFIER
(V)
(dB) (1)
(INCREASING OR FIXED GAIN)
(DECREASING GAIN)
0-0.33
0.31-0
-38(2)
0.34-0.42
0.43-0.32
-37
0.43-0.52
0.54-0.44
-35
0.53-0.63
0.64-0.55
-33
0.64-0.75
0.75-0.65
-31
0.76-0.86
0.86-0.76
-29
0.87-0.97
0.97-0.87
-27
0.98-1.07
1.08-0.98
-25
1.08-1.18
1.19-1.09
-23
1.19-1.30
1.32-1.20
-21
1.31-1.41
1.42-1.33
-19
1.42-1.52
1.53-1.43
-17
1.53-1.63
1.63-1.54
-15
1.64-1.75
1.75-1.64
-13
1.76-1.85
1.84-1.76
-12
1.86-1.96
1.96-1.85
-10
1.97-2.07
2.09-1.97
-8
2.08-2.18
2.19-2.10
-6
2.19-2.30
2.33-2.20
-4
2.31-2.40
2.43-2.34
-2
2.41-2.52
2.49-2.44
0(2)
2.53-2.63
2.62-2.50
2
2.64-2.75
2.75-2.63
4
2.76-2.87
2.85-2.76
6
2.88-2.98
2.99-2.86
8
2.99-3.10
3.12-3.00
10
3.11-3.22
3.25-3.13
12
3.23-3.33
3.36-3.26
14
3.34-3.47
3.48-3.37
16
3.48-3.69
3.64-3.49
18
3.70-VDD
VDD-3.65
20(2)
(1)
The typical part-to-part gain variation can be as large as
±2 dB (one gain step).
(2)
Tested in production.
The volume control circuitry of the TPA2008D2 is internally referenced to the VDD and AGND terminals. Any
common-mode noise between the VOLUME terminal and these terminals will be sensed by the volume control
circuitry. If the noise exceeds the step size voltage, the gain will change. In order to minimize this effect, care
must be taken to ensure the signal driving the VOLUME terminal is referenced to the VDD and AGND terminals
of the TPA2008D2. See section titled, “Special Layout Considerations” for more details.
6
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