參數(shù)資料
型號: BT458LPJ165
英文描述: Video DAC with Color Palette (RAMDAC)
中文描述: 視頻DAC的調(diào)色板(的RAMDAC)
文件頁數(shù): 26/60頁
文件大?。?/td> 647K
代理商: BT458LPJ165
3.0 PC Board Layout Considerations
Bt457/Bt458
3.2 Power and Ground Planes
125 MHz/135 MHz/165 MHz Monolithic CMOS 256 Color Palette RAMDAC
3-2
Conexant
L45801 Rev. N
3.2 Power and Ground Planes
Power and ground planes need isolation gaps to minimize digital switching noise
effects on the analog signals and components. These gaps need to be at least
1/8-inch wide. They are placed so that digital currents cannot flow through a
peninsula that contains the analog components, signals, and video connector.
Figure 3-1
illustrates a sample layout.
Figure 3-1. Sample Layout Showing Power and Ground Plane Isolation Gaps
Edge of PCB
Digital Area
RAMDAC
Analog
Area
Digital Area
457-8_005
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