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参数资料
| 型号： | TDA7400D |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO28 |
| 封装： | SOP-28 |
| 文件页数： | 5/28页 |
| 文件大小： | 277K |
| 代理商： | TDA7400D |
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For timing purposes the Bit 3 of the I
2C bus out-
put register is set to 1 from the start of muting un-
til the end of demuting.
Bass
There are four parameters programmable in the
bass stage: (see figs 6, 7, 8, 9):
Attenuation
Figure 6 shows the attenuation as a function of
frequency at a center frequency at a center fre-
quency of 80Hz.
Central Frequency
Figure 7 shows the four possible center frequen-
cies 60,70,80 and 100Hz.
Quality Factors
Figure 8 shows the four possible quality factors 1,
1.25, 1.5 and 2.
DC Mode
In this mode the DC gain is increased by 5.1dB.
In addition the programmed center frequency and
quality factor is decreased by 25% which can be
used to reach alternative center frequencies or
quality factors.
TREBLE
There are two parameters programmable in the
treble stage (see figs 10, 11):
Attenuation
Figure 10 shows the attenuation as a function of
frequency at a center frequency of 17.5KHz.
Center Frequency
Figure 11 shows the four possible Center Fre-
quency (10, 12.5, 15 and 17.5kHz).
Speaker Attenuator
The speaker attenuators have exactely the same
structure and range like the Volume stage.
1
EXT.
MUTE
+SIGNAL
REF
-SIGNAL
1
I
2C BUS
OUT
Time
D97AU634
Figure 5. Softmute Timing
0.0
2.5
5.0
7.5
10.0
12.5
15.0
10.0
100.0
1.0K
10.0K
Figure 7. Bass Center @ Gain = 14dB, Q = 1
-15.0
-10.0
-5.0
0.0
5.0
10.0
15.0
10.0
100.0
1.0K
10.0K
Figure 6. Bass Control @ fc = 80Hz, Q = 1
Note: Please notice that a started Mute action is always terminated
and could not be interrupted by a change of the mute signal.
TDA7400D
13/28
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| TDA7400DTR | 功能描述:音频 DSP ADV CAR SGNL PROCESR 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 |
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| TDA7401D | 功能描述:音频 DSP Digital Audio Proc 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 |
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