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參數(shù)資料
| 型號(hào)： | FMS6690 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Six Channel, 6th Order SD/PS/HD Video Filter Driver |
| 中文描述： | 六通道6階標(biāo)清/個(gè)PS / HD視頻濾波驅(qū)動(dòng)器 |
| 文件頁(yè)數(shù)： | 5/10頁(yè) |
| 文件大?。?/td> | 96K |
| 代理商： | FMS6690 |
FMS6690 Rev. 2A
5
www.fairchildsemi.com
F
Applications Information
Functional Description
The FMS6690 Low Cost Video Filter (LCVF) provides 6dB gain
(9dB optional, contact factory for further information) from input
to output. In addition, the input will be 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 the diagram below.
Figure 1. Typical Voltage Levels
The FMS6690 provides an internal diode clamp to support AC-
coupled input signals. If the input signal does not go below
ground, the input clamp will not operate. This allows DAC out-
puts to directly drive the FMS6690 without an AC coupling
capacitor. The worst-case sync tip compression due to the
clamp will not exceed 7mV. The input level set by the clamp
combined with the internal DC offset will keep the output within
its acceptable range. When the input is AC-coupled, the diode
clamp will set the sync tip (or lowest voltage) just below ground.
For symmetric signals like C, U, V, Cb, Cr, Pb and Pr, the aver-
age 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 below:
Figure 2. Input Clamp Circuit
I/O Configurations
For DC-coupled DAC drive with DC-coupled outputs, use this
configuration:
Figure 3. 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 follows:
Figure 4.
AC-coupled Inputs, DC-coupled Outputs
When the FMS6690 is driven by an unknown external source or
a SCART switch with its own clamping circuitry, the inputs
should be AC-coupled as follows:
Figure 5. SCART Configuration with DC-coupled
Outputs
There will be 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
0.15V
0.5V
0.85V
Vin
0.28V
0.88V
1.58V
2.28V
Driven by:
DC-Coupled DAC Outputs or
AC-Coupled and Clamped
Y, R, G, B, CV
Vout
0.58V
1.28V
1.98V
Driven by:
DC-Coupled DAC Outputs
AC-Coupled and Biased
U, V, Pb, Pr, C
Vout
YOUT
Driver
YIN
0.65V
800k
DVD or
STB
SoC
DAC
Output
75
LCVF
Clamp
Inactive
0V - 1.4V
DVD or
STB
SoC
DAC
Output
75
LCVF
Clamp
Active
0.1u
0V - 1.4V
75
LCVF
Clamp
Active
75
0.1u
External Video
source must
be AC-coupled.
0V - 1.4V
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相關(guān)代理商/技術(shù)參數(shù) |
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| FMS6690_06 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Six Channel, 6th Order SD/PS/HD Video Filter Driver |
| FMS6690A FMS6246A WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FMS6690MTC20 | 功能描述:視頻 IC Ang fg 6Chnl6thOrd SD/PS/HD VidFltrDrvr 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 |
| FMS6690MTC20X | 功能描述:視頻 IC Ang fg 6Chnl6thOrd SD/PS/HD VidFltrDrvr 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 |
| FMS6G10US60 | 功能描述:IGBT 模塊 600V 10A MODULE RoHS:否 制造商:Infineon Technologies 產(chǎn)品:IGBT Silicon Modules 配置:Dual 集電極—發(fā)射極最大電壓 VCEO:600 V 集電極—射極飽和電壓:1.95 V 在25 C的連續(xù)集電極電流:230 A 柵極—射極漏泄電流:400 nA 功率耗散:445 W 最大工作溫度:+ 125 C 封裝 / 箱體:34MM 封裝: |
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