Datasheet > FMS6408-6

FMS6408-6

更新时间： 2022-12-12 00:10:50

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		驱动器
页数	文件大小	规格书
9页	248K
描述
Triple Video Filter Driver for RGB and YUV Signals

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FMS6408-6 数据手册

www.fairchildsemi.com

FMS6408

Triple Video Filter Driver for RGB and YUV Signals

Features

Description

• 7.6MHz 5th order RGB/YUV/YC CV ﬁlters

• 50dB stopband attenuation at 27MHz on all outputs

• Better than 0.5dB ﬂatness to 4.2MHz on all outputs

• No external frequency selection components or clocks

• AC coupled inputs and AC or DC coupled outputs

• Supports both NTSC and PAL luminance bandwidth

• Continuous time low pass ﬁlters for video anti-aliasing

or reconstruction applications

The FMS6408 provides three video signal paths including a

two-input mux, a video ﬁlter and a 6dB gain output driver.

The ﬁlter bandwidth supports RGB and YUV signals in

either NTSC or PAL formats.

The video ﬁlters approximate a 5th order Butterworth low

pass characteristic optimized for minimum overshoot and

ﬂat group delay to provide excellent image quality. Four

different peaking options are available. The video ﬁlters can

be bypassed if desired.

• <1% differential gain with 0.5° differential phase on

all channels

• Integrated DC restore circuitry with low tilt

In a typical application, the RGB or YUV DAC outputs are

AC coupled into the ﬁlters through the input mux. All

channels have DC restore circuitry to clamp the DC input

levels during video sync. The clamp pulse derived from the

selectedY input controls three independent feedback clamps.

All outputs are capable of driving 2Vpp, AC or DC coupled,

into either a single (150Ω) or dual (75Ω) video load. The

FMS6408 clamp levels can be factory programmed forYUV

/RGB (250mV for all channels), YC / YPbPr (250mV on

channel 1 and 1.125V on channels 2 and 3) or YC CV

(250mV on channels 1 and 3 and 1.125V on channel 2).

Applications

• Cable set top boxes

• Satellite set top boxes

• Terrestrial set top boxes

• DVD players

• Personal Video Recorders (PVR)

• Video On Demand (VOD)

Functional Block Diagram

IN_MUX(A/B)

BYPASS (BYPASS/FILTER)

OUT

6dB

INA

8MHz

INB

250mV

Sync Processing

OUT

6dB

INA

INB

8MHz

250mV or

1.125V *

OUT

6dB

INA

INB

8MHz

250mV or

1.125V *

* Factory Selected Clamp

and Peaking Levels

REV. 2C August 31, 2004

12 3 4 5 6 7...9

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