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    • 參數(shù)資料
    型號(hào)： TDA7402
    廠商： STMICROELECTRONICS
    元件分類： 消費(fèi)家電
    英文描述： SPECIALTY CONSUMER CIRCUIT, PQFP44
    封裝： 10 X 10 MM, 1.40 MM HEIGHT, TQFP-44
    文件頁數(shù)： 10/69頁
    文件大小： 865K
    代理商： TDA7402
    Audioprocessor part
    TDA7402
    The root cause of this procedure is, that after muting the stereo decoder (Step 1), the
    internal stereo decoder filters have to settle in order to perform a proper offset cancellation.
    3.3.2
    AutoZero remain
    In some cases, for example if the P is executing a refresh cycle of the I2C Bus
    programming, it is not useful to start a new AutoZero action because no new source is
    selected and an undesired mute would appear at the outputs. For such applications the
    TDA7402 could be switched in the AutoZero Remain Mode (Bit 6 of the subaddress byte).
    If this bit is set to high, the DATABYTE 0 could be loaded without invoking the AutoZero and
    the old adjustment value remains.
    3.4
    Pause detector / MUX-output
    The pin number 40 (Pause/MUX) is configurable for two different functions:
    1.
    During pause detector OFF this pin is used as a mono output of the main input selector.
    This signal is often used to drive a level/equalizer display on the car radio front panel.
    2.
    During pause detector ON the pin is used to define the time constant of the detector by
    an external capacitor. The pause detector is driven by the internal stereo decoder
    outputs in order to use pauses in the FM signal for alternate frequency jumps. If the
    signal level of both stereo decoder channels is outside the programmed voltage
    window, the external capacitor is abruptly discharged. Inside the pause condition the
    capacitor is slowly recharged by a constant current of 25A. The pause information is
    also available via I2C Bus (see I2C Bus programming).
    3.4.1
    Loudness
    There are four parameters programmable in the loudness stage:
    3.4.2
    Attenuation
    Figure 4 shows the attenuation as a function of frequency at fP = 400Hz
    Figure 4.
    Loudness attenuation @ fP = 400Hz.
    dB
    Hz
    -25.0
    -20.0
    -15.0
    -10.0
    -5.0
    0.0
    10.0
    100.0
    1.0K
    10.0K
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    相關(guān)代理商/技術(shù)參數(shù)
    參數(shù)描述
    TDA7402_07 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Car radio signal processor
    TDA7402TR 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
    TDA7403 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:BASIC SIGNAL PROCESSOR
    TDA7403_02 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:BASIC SIGNAL PROCESSOR
    TDA7403D 功能描述:音頻 DSP Basic Signal Process 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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