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參數(shù)資料
| 型號(hào)： | FMS6143ACSX |
| 廠(chǎng)商： | Fairchild Semiconductor |
| 文件頁(yè)數(shù)： | 13/13頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC DRIVER VIDEO FILTER 1CH 8SOIC |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 類(lèi)型： | 視頻濾波器 |
| 應(yīng)用： | 機(jī)頂盒，視頻播放器，錄音機(jī) |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SOICN |
| 包裝： | 帶卷 (TR) |
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2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FMS6143A Rev. 1.0.1
9
FMS6143A
—Three-Channel
6
th
-Order
Standard-Definition
VoltagePlus
Video
Filter
Driver
Application Information
Application Circuits
The FMS6143A VoltagePlus video filter provides 6dB
gain from input to output. In addition, the input is slightly
offset to optimize the output driver performance. The
offset is held to the minimum required value to decrease
the standing DC current into the load. Typical voltage
levels are shown in Figure 11.
There is a 280mV offset from the DC input level to the
DC output level. V OUT = 2 * V IN + 280mV.
0.0 -> 0.02V
0.3 -> 0.32V
0.65 -> 0.67V
1.0 -> 1.02V
VIN
0.28V
0.88V
1.58V
2.28V
Driven by:
DC-Coupled DAC Outputs
AC-Coupled and Clamped
Y, CV, R, G, B
VOUT
0.15V
0.5V
0.85V
VIN
0.58V
1.28V
1.98V
Driven by:
AC-Coupled and Biased
U, V, Pb, Pr, C
VOUT
Figure 11. Typical Voltage Levels
The FMS6143A provides an internal diode clamp to
support AC-coupled input signals. If the input signal
does not go below ground, the input clamp does not
operate. This allows DAC outputs to directly drive the
FMS6143A without an AC coupling capacitor. When the
input is AC coupled, the diode clamp sets the sync tip
(or lowest voltage) just below ground. The worst-case
sync tip compression due to the clamp cannot exceed
7mV. The input level set by the clamp, combined with
the internal DC offset, keeps the output within its
acceptable range.
For symmetric signals like Chroma, U, V, Pb, and Pr;
the average DC bias is fairly constant and the inputs can
be AC coupled with the addition of a pull-up resistor to
set the DC input voltage. DAC outputs can also drive
these same signals without the AC-coupling capacitor. A
conceptual illustration of the input clamp circuit is shown
in Figure 12.
YOUT
Video Cables
75
Driver
YIN
LOAD1
LOAD2
(optional)
0.65V
Figure 12. Input Clamp Circuit
I/O Configurations
For a DC-coupled DAC drive with DC-coupled outputs,
use this configuration:
DVD or
STB
SoC
DAC
Output
75W
LCVF
Clamp
Inactive
0V - 1.4V
Figure 13. DC-Coupled Inputs and Outputs
Alternatively, if the DAC’s average DC output level causes
the signal to exceed the range of 0V to 1.4V, it can be
AC coupled as:
DVD or
STB
SoC
DAC
Output
LCVF
Clamp
Active
0.1μ
0V - 1.4V
75
Figure 14. AC-Coupled Inputs, DC-Coupled Outputs
When the FMS6143A is driven by an unknown external
source or a SCART switch with its own clamping circuitry,
the inputs should be AC coupled as shown in Figure 15.
75
LCVF
Clamp
Active
0.1μ
External video
source must
be AC coupled
0V - 1.4V
75
Figure 15. SCART with DC-Coupled Outputs
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FMS6143CS | 功能描述:視頻 IC Video Filter Driver RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| FMS6143CSX | 功能描述:視頻 IC Video Filter Driver RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| FMS6143CSX | 制造商:Fairchild Semiconductor Corporation 功能描述:Video Filter |
| FMS6143CSX_NA3M248 | 功能描述:緩沖器和線(xiàn)路驅(qū)動(dòng)器 Video Filter Driver RoHS:否 制造商:Micrel 輸入線(xiàn)路數(shù)量:1 輸出線(xiàn)路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| FMS6143CSX_NS5C002 | 功能描述:視頻 IC Video Filter Driver RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
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