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参数资料
| 型号： | TDA7440D013TR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 音频控制 |
| 英文描述： | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28 |
| 封装： | SO-28 |
| 文件页数： | 13/17页 |
| 文件大小： | 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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| TDA7442D013TR | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TDA7442 | 功能描述:多媒体杂项 Tone Control Suround Digtal Cntrold Audio RoHS:否 制造商:Texas Instruments 类型: 通道数量: 转换速率:540 Mbps 分辨率: 封装 / 箱体:SOIC-16 封装:Tube |
| TDA7442D | 功能描述:多媒体杂项 Tone Control Suround Digtal Cntrold Audio RoHS:否 制造商:Texas Instruments 类型: 通道数量: 转换速率:540 Mbps 分辨率: 封装 / 箱体:SOIC-16 封装:Tube |
| TDA7442D013TR | 功能描述:多媒体杂项 Tone Control Suround Digtal Cntrold Audio RoHS:否 制造商:Texas Instruments 类型: 通道数量: 转换速率:540 Mbps 分辨率: 封装 / 箱体:SOIC-16 封装:Tube |
| TDA7443D | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:TONE CONTROL AND SURROUND DIGITALLY CONTROLLED AUDIO PROCESSOR WITH AGC |
| TDA7448 | 功能描述:音频放大器 6 Ch Volume CNTRL 0 to -79dB 1.0dB CNT RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
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