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  • 參數(shù)資料
    型號: TLV320DAC26IRHBRG4
    英文描述: LOW POWER STEREO AUDIO DAC WITH HEADPHONE/SPEAKER AMPLIFIER
    中文描述: 低功耗立體聲音頻DAC耳機/揚聲器放大器
    文件頁數(shù): 38/46頁
    文件大?。?/td> 452K
    代理商: TLV320DAC26IRHBRG4
    SLAS428 AUGUST 2004
    www.ti.com
    38
    LAYOUT
    The following layout suggestions should provide optimum performance from the ’DAC26. However, many portable
    applications have conflicting requirements concerning power, cost, size, and weight. In general, most portable devices
    have fairly
    clean
    power and grounds because most of the internal components are very low power. This situation means
    less bypassing for the converter power and less concern regarding grounding. Still, each situation is unique and the
    following suggestions should be reviewed carefully.
    For optimum performance, care must be taken with the physical layout of the ’DAC26 circuitry. Power to the ’DAC26 must
    be clean and well bypassed. A 0.1-
    μ
    F ceramic bypass capacitor must be placed as close to the device as possible. A 1-
    μ
    F
    to 10-
    μ
    F capacitor may also be needed if the impedance between the ’DAC26 supply pins and the system power supply
    is high.
    The ground pins must be connected to a clean ground point. In many cases, this is the
    analog
    ground. Avoid connections
    which are too near the grounding point of a microcontroller or digital signal processor. If needed, run a ground trace directly
    from the converter to the power supply entry or battery connection point. The ideal layout includes an analog ground plane
    dedicated to the converter and associated analog circuitry.
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