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參數(shù)資料
| 型號： | TDA7440D013TR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28 |
| 封裝： | SO-28 |
| 文件頁數(shù)： | 13/17頁 |
| 文件大?。?/td> | 735K |
| 代理商： | TDA7440D013TR |
5/17
TDA7440
3
APPLICATION SUGGESTIONS
The first and the last stages are volume control blocks. The control range is 0 to -47dB (mute) for the first
one, 0 to -79dB (mute) for the last one. Both of them have 1dB step resolution. The very high resolution
allows the implementation of systems free from any noisy acoustical effect.
The TDA7440D audioprocessor provides 3 bands tones control.
3.1 Bass Stage
Several filter types can be implemented, connecting external components to the Bass IN and OUT pins.
The fig.5 refers to basic T Type Bandpass Filter starting from the filter component values (R1 internal and
R2,C1,C2 external) the centre frequency Fc, the gain Av at max. boost and the filter Q factor are computed
as follows:
Viceversa, once Fc, Av, and Ri internal value are fixed, the external components values will be:
Figure 5.
Treble Stage
The treble stage is a high pass filter whose time constant is fixed by an internal resistor (25K
typical) and
an external capacitor connected between treble pins and ground.
Typical responses are reported in Figg. 14 to 17.
CREF
The suggested 10mF reference capacitor (CREF) value can be reduced to 4.7mF if the application re-
quires faster power ON.
F
C
1
2
π
R1 R2 C1 C2
-----------------------------------------------------------------
=
A
V
R2 C2
R2 C1
R
i C1
+
R2 C1
R2 C2
+
----------------------------------------------------------------
=
Q
R1 R2 C1 C2
R2 C1
R2 C2
+
--------------------------------------------------
=
C1
A
V
1
–
2
π F
C
R
i
Q
------------------------------------------
C2
Q
2
C1
A
V
1
–
Q
2
–
------------------------------
R2
A
V
1
–
Q
2
–
2
π C1 F
C
A
V
1
–
() Q
-----------------------------------------------------------------------
=
Ri internal
C2
OUT
IN
C1
R2
D95AU313
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7442 | 功能描述:多媒體雜項 Tone Control Suround Digtal Cntrold Audio RoHS:否 制造商:Texas Instruments 類型: 通道數(shù)量: 轉(zhuǎn)換速率:540 Mbps 分辨率: 封裝 / 箱體:SOIC-16 封裝:Tube |
| TDA7442D | 功能描述:多媒體雜項 Tone Control Suround Digtal Cntrold Audio RoHS:否 制造商:Texas Instruments 類型: 通道數(shù)量: 轉(zhuǎn)換速率:540 Mbps 分辨率: 封裝 / 箱體:SOIC-16 封裝:Tube |
| TDA7442D013TR | 功能描述:多媒體雜項 Tone Control Suround Digtal Cntrold Audio RoHS:否 制造商:Texas Instruments 類型: 通道數(shù)量: 轉(zhuǎn)換速率:540 Mbps 分辨率: 封裝 / 箱體:SOIC-16 封裝:Tube |
| TDA7443D | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TONE CONTROL AND SURROUND DIGITALLY CONTROLLED AUDIO PROCESSOR WITH AGC |
| TDA7448 | 功能描述:音頻放大器 6 Ch Volume CNTRL 0 to -79dB 1.0dB CNT RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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