- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98196 > TDA7439B (STMICROELECTRONICS) 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDIP28 PDF資料下載
參數(shù)資料
| 型號(hào)： | TDA7439B |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDIP28 |
| 封裝： | DIP-28 |
| 文件頁(yè)數(shù)： | 16/19頁(yè) |
| 文件大?。?/td> | 169K |
| 代理商： | TDA7439B |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)當(dāng)前第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)
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 TDA7439 audioprocessor provides 3 bands
tones control.
Bass, Middle Stages
The Bass and the middle cells have the same
structure.
The Bass cell has an internal resistor Ri = 44K
typical.
The Middle cell has an internal resistor Ri = 25K
typical.
Several filter types can be implemented, connect-
ing external components to the Bass/Middle IN
and OUT pins.
The fig.1 refers to basic T Type Bandpass Filter
starting from the filter component values (R1 in-
ternal and R2,C1,C2 external) the centre fre-
quency Fc, the gain Av at max. boost and the fil-
ter Q factor are computed as follows:
FC
=
1
2
π √
R1
R2 C1 C2
AV
=
R2 C2
+ R2 C1 + Ri C1
R2 C1
+ R2 C2
Q
= √
R1
R2 C1 C2
R2 C1
+ R2 C2
Viceversa, once Fc, Av, and Ri internal value are
fixed, the external components values will be:
C1
=
AV
1
2
π FC Ri Q
C2
=
Q
2
C1
AV
1 Q2
R2
=
AV
1 Q2
2
π C1 FC (AV 1) Q
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 be-
tween treble pins and ground
Typical responses are reported in Figg. 10 to 13.
CREF
The suggested 10
F reference capacitor (CREF)
value can be reduced to 4.7
F if the application
requires faster power ON.
Ri internal
C2
OUT
IN
C1
R2
D95AU313
Figure 1.
Figure 2: THD vs. frequency
Figure 3: THD vs. RLOAD
TDA7439
6/19
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TDA7439 | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDIP30 |
| TDA7440D | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28 |
| TDA7440D013TR | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28 |
| TDA7442D | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28 |
| TDA7442 | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDIP32 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TDA7439DS_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Three-band digitally-controlled audio processor |
| TDA7439DS13TR | 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(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TDA7440 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:TONE CONTROL DIGITALLY CONTROLLED AUDIO PROCESSOR |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。