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参数资料
| 型号： | TDA7405 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 音频控制 |
| 英文描述： | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PQFP44 |
| 封装： | 10 X 10 MM, 1.40 MM HEIGHT, TQFP-44 |
| 文件页数： | 14/57页 |
| 文件大小： | 750K |
| 代理商： | TDA7405 |
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TDA7405
5.10.3Characteristic
To achieve the desired compression characteristic like shown below the volume has to be decreased by 4dB.
Figure 22. Compander Characteristic
5.10.4IC -BUS-Timing
When the Compander is active a volume- word coming from this stage is added to the I2C-Bus volume-word
and the volume is changed with a soft slope between adjacent steps (SoftStep-stage). As mentioned in the de-
scription of this stage it is not recommended to change the volume during this slope. To avoid this behaviour-
while the Compander is working, and the volume has to be changed, the compander-hold-bit is implemented
(Bit 7 in the subaddress-byte). The recommended timing for changing the volume during compander-ON is the
following:
1. Set the compander-hold-bit
2. Wait the actual SoftStep-time
3. Change the volume
4. Reset the compander-hold-bit
The SoftStep-times are in compander-ON condition automatically adapted to the attack-time of the Compander.
In the following table the related SoftStep-times are shown:
5.10.5AC-Coupling
In some applications additional signal manipulations are desired, for example surround-sound or more-band-
equalizing. For this purpose an AC-Coupling is placed before the speaker-attenuators, which can be activated
or internally shorted by IC-Bus. In short condition the input-signal of the speaker-attenuator is available at the
AC-Outputs. The input-impedance of this AC-Inputs is 50k
.
Attack-Time
SoftStep-Time
6ms
0.16ms
12ms
0.32ms
24ms
0.64ms
48ms
1.28ms
dB
-60
-50
-40
-30
-20
-10
0
-10
-20
-30
-40
-50
-60
Input Level
Output Level
-8dB
15dB
-38dB
2:1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TDA7405_04 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:EQUALIZER CARRADIO SIGNAL PROCESSOR |
| TDA7405TR | 功能描述:处理器 - 专门应用 EQUALIZER CAR RADIO SIGNAL PROCESSOR RoHS:否 制造商:Freescale Semiconductor 类型:Multimedia Applications 核心:ARM Cortex A9 处理器系列:i.MX6 数据总线宽度:32 bit 最大时钟频率:1 GHz 指令/数据缓存: 数据 RAM 大小:128 KB 数据 ROM 大小: 工作电源电压: 最大工作温度:+ 95 C 安装风格:SMD/SMT 封装 / 箱体:MAPBGA-432 |
| TDA7406 | 功能描述:音频 DSP Car Radio Signal 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 |
| TDA7406T | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:CAR RADIO SIGNAL PROCESSOR |
| TDA7406TR | 功能描述:音频 DSP INFOTAINMENT SIGNAL 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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