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參數(shù)資料
| 型號(hào)： | FMS6141 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver |
| 中文描述： | 低成本，單通道四階標(biāo)準(zhǔn)清晰度視頻濾波驅(qū)動(dòng)器 |
| 文件頁(yè)數(shù)： | 5/11頁(yè) |
| 文件大?。?/td> | 284K |
| 代理商： | FMS6141 |
F
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2006 Fairchild Semiconductor Corporation
FMS6141 Rev. 1.0.0
www.fairchildsemi.com
5
Application Information
Input Considerations
The FMS6141 Low-Cost Video Filter provides 6dB (2X)
gain from input to output. The device provides an
internal diode clamp to support AC-coupled input
signals. In this configuration, a 0.1μF ceramic capacitor
is used to AC couple the input signal. If the input signal
does not go below ground, the clamp is inactive; but if
the input signal goes below ground, the clamp circuitry
sets the bottom of the sync tip (or lowest voltage) to just
below ground. The input level set by the clamp,
combined with the internal DC offset, keeps the output
signal within an acceptable range. This clamp feature
also allows the FMS6141’s input to be directly driven
(DC-coupled) by a ground referenced DAC output.
Figure 4 shows typical DC voltage levels for the input
and output signals when driven by a DC-coupled DAC
output or an AC-coupled and clamped Y, CV signal.
0.28V
0.88V
1.58V
2.28V
0.0 -> 0.02V
0.3 -> 0.32V
0.65 -> 0.67V
1.0 -> 1.02V
Vin
Vout
Figure 4. Typical DC Voltage Levels
Output Considerations
The FMS6141’s output is DC offset from the input by
280mv; therefore V
OUT
= 2 V
IN
+280mv. This offset is
required to obtain optimal performance from the output
driver and is held at the minimum value to decrease the
standing DC current into the load. Since the FMS6141
has a 2x (6dB) gain, the output is typically connected via
a 75
-series, back-matching resistor followed by the
75
video cable. Due to the inherent divide-by-two of
this configuration, the blanking level at the load of the
video signal is always less than 1V. When AC-coupling
the output, ensure that the coupling capacitor of choice
passes the lowest frequency content in the video signal
and that line time distortion (video tilt) is kept as low as
possible. The selection of the coupling capacitor is a
function of the subsequent circuit’s input impedance and
the leakage current of the input being driven. To obtain
the highest quality output video signal, the series
termination resistor must be placed as close to the
device’s output pin as possible. This greatly reduces
parasitic capacitance and inductance effects on the
FMS6141’s output driver. The distance from the device’s
pin to the series termination resistor should be no
greater than 0.1 inches, as shown in Figure 5.
Figure 5. Resistor Placement
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| FMS6141CS | Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver |
| FMS6141CSX | Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver |
| FMS6141S5X | Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver |
| FMS6143CS | Low Cost Three Channel 4th Order Standard Definition Video Filter Driver |
| FMS6143 | Low Cost Three Channel 4th Order Standard Definition Video Filter Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FMS6141_06 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver |
| FMS6141CS | 功能描述:有源濾波器 1-Ch 4th Order Std Video Filter Driver RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube |
| FMS6141CSX | 功能描述:有源濾波器 1-Ch 4th Order Std Video Filter Driver RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube |
| FMS6141CSX | 制造商:Fairchild Semiconductor Corporation 功能描述:FILTER DRIVER VIDEO SMD SOIC8 |
| FMS6141S5X | 功能描述:有源濾波器 1-Ch 4th Order Std Video Filter Driver RoHS:否 制造商:Maxim Integrated 通道數(shù)量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube |
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