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參數(shù)資料
| 型號： | FMS6346EMTC20X |
| 廠商： | Fairchild Semiconductor |
| 文件頁數(shù)： | 2/11頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DVR VFD SD/HD 6CH 20-TSSOP |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 類型： | 濾波器驅(qū)動器 |
| 應(yīng)用： | 機(jī)頂盒，視頻播放器 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 20-TSSOP |
| 包裝： | 帶卷 (TR) |
2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FMS6346E Rev.3.0.0
10
FMS6346E
—
Six-Channel,
Selectable
SD/HD
Volt
agePlus
Video
Filter
Driver
with
Disable
Applications Information
Functional Description
The FMS6346E 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 10.
There is a 280mV offset from the DC input level to the
DC output level. VOUT =2 VIN + 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 10. Typical Voltage Levels
The FMS6346E offers three channels with internal diode
clamps and three channels with biasing 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 FMS6346E
without an AC-coupling capacitor. The worst-case sync-
tip compression due to the clamp does not exceed 7mV.
The input level set by the clamp, combined with the
internal DC offset, keeps the output within its acceptable
range. When the input is AC coupled, the diode clamp
sets the sync-tip (or lowest voltage) just below ground.
For symmetric signals like C, Pb, and Pr; the average
DC bias is fairly constant and the inputs are biased to
set the DC input voltage to approximately 600mV. 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 11.
YOUT
Driver
YIN
0.65V
800k
Figure 11. Input Clamp Circuit
I/O Congurations
For DC-coupled DAC drive with DC-coupled outputs,
use the conguration shown in Figure 12.
DVD or
STB
SoC
DAC
Output
75
LCVF
Clamp
Inactive
0V - 1.4V
Figure 12. DC-Coupled Inputs and Outputs
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 shown in Figure 13.
DVD or
STB
SoC
DAC
Output
LCVF
Clamp
Active
0.1μF
0V - 1.4V
75
Figure 13. AC-Coupled Inputs, DC-Coupled Outputs
When 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 14.
75
LCVF
Clamp
Active
0.1μF
External video
source must
be AC coupled
0V - 1.4V
75
Figure 14. SCART Conguration 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 |
|---|---|
| FMS6346MTC20 | 功能描述:視頻 IC 6CH 6th Order SD HD 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 |
| FMS6346MTC20X | 功能描述:視頻 IC Ang fg 6Chanl 6thOrd SD/HDVidFiltrDr 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 |
| FMS6353EUCX | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FMS6363 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Low-Cost, Three-Channel, 6th-Order, High-Definition, Video Filter Driver |
| FMS6363_0512 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Low Cost Three Channel 6th Order High Definition Video Filter Driver |
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