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参数资料
| 型号： | TDA7438 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 音频控制 |
| 英文描述： | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDIP28 |
| 封装： | DIP-28 |
| 文件页数： | 15/19页 |
| 文件大小： | 215K |
| 代理商： | TDA7438 |
Obsolete
Product(s)
- Obsolete
Product(s)
5/19
TDA7438
Figure 4. Test Circuit
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 TDA7438 audioprocessor provides 3 bands tones control.
3.1 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, connecting external components to the Bass/Middle IN and OUT
pins.
Figure 5.
0/30dB
2dB STEP
MUXOUTL
INL
VOLUME
TREBLE
TREBLE(L)
MIDDLE
MUXOUTR
INR
TREBLE(R)
BOUT(L)
MIN(L)
SPKR ATT
LEFT
LOUT
SCL
SDA
DIGGND
ROUT
D96AU490A
I
2CBUS DECODER + LATCHES
5.6nF
2.2
F
100K
G
L-IN1
L-IN2
L-IN3
0.47
F
0.47
F
0.47
F
100K
R-IN1
R-IN2
R-IN3
0.47
F
0.47
F
0.47
F
G
INPUT MULTIPLEXER
+ GAIN
MOUT(L)
BASS
BIN(L)
18nF
22nF
100nF
2.7K
5.6K
BASS
SPKR ATT
RIGHT
MIN(R)
MOUT(R)
BOUT(R)
BIN(R)
5.6nF
18nF
22nF
100nF
2.7K
5.6K
SUPPLY
10
F
CREF
AGND
VS
RM
RB
RM
RB
27
3
4
5
2
1
28
21
22
20
26
24
25
8
9
19
10
11
12
13
23
6
7
18
17
16
14
15
VREF
2.2
F
Ri internal
C2
OUT
IN
C1
R2
D95AU313
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PDF描述 |
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| TDA7438D | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28 |
| TDA7438D013TR | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28 |
| TDA7439D | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28 |
| TDA7439B | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDIP28 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TDA7438_04 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:THREE BANDS DIGITALLY CONTROLLED AUDIO PROCESSOR |
| TDA7438D | 功能描述:音频 DSP 3-Band Digital Cont RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| TDA7438D013TR | 功能描述:音频 DSP 3-Band Digital Cont RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| TDA7439 | 功能描述:音频 DSP 3-Band Digital Cont RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| TDA7439_08 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Three-band digitally-controlled audio processor |
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