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參數資料
| 型號： | TDA7438D013TR |
| 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： | 16/19頁 |
| 文件大?。?/td> | 215K |
| 代理商： | TDA7438D013TR |
Obsolete
Product(s)
- Obsolete
Product(s)
TDA7438
6/19
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:
3.2 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.
3.3 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
Ri R2 C1 C2
,
,,
-----------------------------------------------------------
=
A
V
R2C2
R 2C1
RiC1
++
R1C1
R 2C2
+
------------------------------------------------------------
=
Q
Ri R2 C1 C2
,
,,
R2C1
R2C2
+
-------------------------------------------
=
C1
A
V
1
–
2
π R
i
Q
------------------------------
C2
Q
2
C1
A
V
1Q
2
–
------------------------
=
R2
A
V
1
–
Q
2
–
2
π C1 F
c
A
V
1
–
() Q
---------------------------------------------------------------------
=
Figure 6. THD vs. frequency
Figure 7. THD vs. RLOAD
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TDA7439 | 功能描述:音頻 DSP 3-Band Digital Cont RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風格: 封裝 / 箱體: 封裝:Tube |
| TDA7439_08 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Three-band digitally-controlled audio processor |
| TDA7439B | 功能描述:音頻 DSP 3-Band Digital Cont RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風格: 封裝 / 箱體: 封裝:Tube |
| TDA7439D | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:THREE BANDS DIGITALLY CONTROLLED AUDIO PROCESSOR |
| TDA7439DS | 功能描述:音頻 DSP 3-Band Digital Cont RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風格: 封裝 / 箱體: 封裝:Tube |
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