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參數(shù)資料
| 型號： | BT864AKPF |
| 英文描述： | Color Encoder Circuit |
| 中文描述： | 顏色編碼器電路 |
| 文件頁數(shù)： | 57/76頁 |
| 文件大?。?/td> | 1050K |
| 代理商： | BT864AKPF |
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point to point.
The optimum layout enables the Bt864A/865A to be located as close as
possible to the power supply connector and the video output connector.
100138B
Conexant
3-1
3
3.0 PC Board Considerations
The layout should be optimized for lowest noise on the power and ground planes
by providing good decoupling. The trace length between groups of VAA and
GND pins should be as short as possible to minimize inductive ringing.
A well-designed power distribution network is critical to eliminating digital
switching noise. The ground plane must provide a low-impedance return path for
the digital circuits. A PC board with a minimum of four layers is recommended,
with layers 1 (top) and 4 (bottom) for signals and layers 2 and 3 for ground and
power, respectively.
3.1 Component Placement
Components should be placed as close as possible to the associated pin.
Whenever possible, components should be placed so traces can be connected
3.2 Power and Ground Planes
Separate digital and analog power planes are recommended. The digital power
plane should provide power to all digital logic on the PC board, and the analog
power plane should provide power to the VAA power pin, protection diodes,
RF modulator, VREF, VBIAS, and COMP decoupling. There should be at least a
1/8-inch gap between the digital and analog power planes, connected by a single
point through a ferrite bead, as illustrated in
Figures 3-1
and
3-2
. The ground
plane should be a single unified plane overlapping both analog and digital power
planes. The path back to the power supply should be with the lowest impedance
possible with only one possible return path. This layout eliminates noise on the
analog signals caused by cross-currents from digital switching.
This bead should be located within 3 inches of the Bt864A/865A. The bead
provides impedance to switching currents, which provides increased impedance at
high frequencies. A low-resistance (<0.5
) bead should be used, such as
Ferroxcube 5659065-3B, Fair-Rite 2723021447, or TDK BF45-4001.
相關(guān)PDF資料 |
PDF描述 |
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| BT865AKPF | Color Encoder Circuit |
| BT867KPF | Color Encoder Circuit |
| BT867KPJ | Color Encoder Circuit |
| BT8920EPJ | Analog-to-Digital Converter， 16-Bit |
| BT8920EPJ600 | Analog-to-Digital Converter， 16-Bit |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BT864AKRF | 制造商:CONEXANT 制造商全稱:CONEXANT 功能描述:YCrCb to NTSC/PAL Digital Video Encoder |
| BT864KPF | 制造商:BT 功能描述:COLOR SIGNAL ENCODER, PQFP52 |
| BT864KPF-ES1 | 制造商:BT 功能描述:864KPF-ES1 |
| BT865A | 制造商:CONEXANT 制造商全稱:CONEXANT 功能描述:High Performance YCrCb to NTSC/PAL Digital Video Encoders |
| BT865AKPF | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Color Encoder Circuit |
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