參數(shù)資料
型號(hào)： TDA7405
廠商： STMICROELECTRONICS
元件分類： 音頻控制
英文描述： 2 CHANNEL(S), TONE CONTROL CIRCUIT, PQFP44
封裝： 10 X 10 MM, 1.40 MM HEIGHT, TQFP-44
文件頁(yè)數(shù)： 14/57頁(yè)
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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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA7405_04 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:EQUALIZER CARRADIO SIGNAL PROCESSOR
TDA7405TR 功能描述:處理器 - 專門應(yīng)用 EQUALIZER CAR RADIO SIGNAL PROCESSOR RoHS:否 制造商:Freescale Semiconductor 類型:Multimedia Applications 核心:ARM Cortex A9 處理器系列:i.MX6 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:1 GHz 指令/數(shù)據(jù)緩存: 數(shù)據(jù) RAM 大小:128 KB 數(shù)據(jù) ROM 大小: 工作電源電壓: 最大工作溫度:+ 95 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MAPBGA-432
TDA7406 功能描述:音頻 DSP Car Radio Signal 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
TDA7406T 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:CAR RADIO SIGNAL PROCESSOR
TDA7406TR 功能描述:音頻 DSP INFOTAINMENT SIGNAL 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
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