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參數(shù)資料
| 型號： | KS0123 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | DIGITAL VIDEO ENCODER |
| 中文描述： | 數(shù)字視頻編碼器 |
| 文件頁數(shù)： | 41/44頁 |
| 文件大?。?/td> | 456K |
| 代理商： | KS0123 |
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KS0123 Data Sheet
MULTIMEDIA VIDEO
PAGE 41 OF 44
Modified on May/04/2000
KS0123 Design Hints
Figure 19 describes power supply decoupling. A clean power supply is crucial for proper operation of the device.
Noise on the power supply lines will couple onto the analog inputs and ultimately result in poor picture quality. The
digital and analog VDD supplies should be separately decoupled with external filter components. This is achieved
by using a ferrite bead with a capacitor on either side. In addition to this filter, 0.1
μ
F capacitors should be placed by
each IC power pin. Additional decoupling can be achieved by placing 0.01
μ
F capacitors in parallel with the 0.1
μ
F
capacitors. These components should be located close to the ENCODER device. The ENCODER ideally should be
located near the input power supply and close to the video inputs connectors.
Figure 19. Power Supply Filtering
A number of different ferrite beads can be used for power supply decoupling. Wire wound ferrite beads are generally
large, but offer greater current capacity and higher impedance for a given frequency (this depends on the ferrite
material and number of windings). A larger current capacity is useful for decoupling many components, such as a
board power supply. Bead on lead and surface mount ferrites do not afford a large impedance to AC, but the
capacitors on each side of the ferrite should eliminate any excessive digital switching noise. Generally, pick a ferrite
with the lowest DC resistance and highest impedance to signals centered around 27 MHz. The large capacitor on
the component side of the ferrite provides low frequency filtering, and acts as a charge reservoir for rapid current
requirements by the ENCODER. Generally, this is located near the ferrite. Some suggested ferrite beads are:
TDK: Wire wound ZBF113T-01; Bead on lead BF45-4001; Surface mount CB50-1206. TDK can be reached at
(708) 803-6100.
Fair-Rite: Wire wound beads Fair-Rite 2943666671; Bead on lead 274300111; SM beads 2743021447. Fair-Rite
is at (914) 895-2055.
Applications that reside in noisy environments or utilize a switching power supply should have local power
regulation. For example, designs for the PC should use the 12 volt power supply and locally regulate the supply to
5 volts with a linear regulator.
For decoupling, use high quality RF capacitors. Type COG or NPO should be used. Avoid Z5U capacitors. Surface
mounting of the filter components is highly recommended. If leaded components are used, keep the leads and
traces as short as possible.
Use a multilayer PC board with separate power and ground planes. The surface mount package requires the top
layer to be a signal layer. The top layer should contain the analog traces, avoid running digital signal traces (clocks
and data lines) or other high speed lines directly under the device. The ground plane should be placed directly
22
μ
F
0.1
μ
F
VDDA
FERRITE
BEADS
+5V
VDD
22
μ
F
22
μ
F
0.1
μ
F
0.1
μ
F
Place 0.1
μ
F caps near
each IC power pin
ENCODER
Board Regulated
Power
22
μ
F 0.1
μ
F
All Grounds are connected together
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| KS0127 | 制造商:Samsung SDI 功能描述:Digital video encoder & decoder |
| KS0127B | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:MULTISTANDARD VIDEO DECODER/SCALER |
| KS-01Q-01 | 功能描述:SWITCH PUSH SPST-NO 0.01A 35V RoHS:是 類別:開關(guān) >> 按鈕 系列:KS, LAMB 標準包裝:1 系列:A16 類型:標準，發(fā)光式 電路:雙刀雙擲 開關(guān)功能:開-瞬時 額定電流:5A（AC） 額定電壓 - AC:125V 額定電壓 - DC:- 觸動器類型:方形，按鈕 顏色 - 致動器/蓋:黃 發(fā)光類型，顏色:LED，黃 發(fā)光電壓:12 VDC 安裝類型:前面板安裝 端接類型:焊接，快速連接 - 0.110"（2.8mm） 防護等級:IP65 - 防塵/防油/防水 特點:- 面板切口尺寸:圓形 - 直徑 16.00mm 包裝:散裝 工作溫度:-10°C ~ 55°C 機械壽命:2,000,000 次循環(huán) 電氣壽命:100,000 次循環(huán) 其它名稱:A165LAYM12D2 |
| KS-01Q-02 | 功能描述:SWITCH PUSH SPST-NO 0.01A 35V RoHS:是 類別:開關(guān) >> 按鈕 系列:KS, LAMB 標準包裝:1 系列:A16 類型:標準，發(fā)光式 電路:雙刀雙擲 開關(guān)功能:開-瞬時 額定電流:5A（AC） 額定電壓 - AC:125V 額定電壓 - DC:- 觸動器類型:方形，按鈕 顏色 - 致動器/蓋:黃 發(fā)光類型，顏色:LED，黃 發(fā)光電壓:12 VDC 安裝類型:前面板安裝 端接類型:焊接，快速連接 - 0.110"（2.8mm） 防護等級:IP65 - 防塵/防油/防水 特點:- 面板切口尺寸:圓形 - 直徑 16.00mm 包裝:散裝 工作溫度:-10°C ~ 55°C 機械壽命:2,000,000 次循環(huán) 電氣壽命:100,000 次循環(huán) 其它名稱:A165LAYM12D2 |
| KS-01Q-03 | 功能描述:SWITCH PUSH SPST-NO 0.01A 35V RoHS:是 類別:開關(guān) >> 按鈕 系列:KS, LAMB 標準包裝:1 系列:A16 類型:標準，發(fā)光式 電路:雙刀雙擲 開關(guān)功能:開-瞬時 額定電流:5A（AC） 額定電壓 - AC:125V 額定電壓 - DC:- 觸動器類型:方形，按鈕 顏色 - 致動器/蓋:黃 發(fā)光類型，顏色:LED，黃 發(fā)光電壓:12 VDC 安裝類型:前面板安裝 端接類型:焊接，快速連接 - 0.110"（2.8mm） 防護等級:IP65 - 防塵/防油/防水 特點:- 面板切口尺寸:圓形 - 直徑 16.00mm 包裝:散裝 工作溫度:-10°C ~ 55°C 機械壽命:2,000,000 次循環(huán) 電氣壽命:100,000 次循環(huán) 其它名稱:A165LAYM12D2 |
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