FMS6151 Datasheet, PDF (1/7 Pages) Fairchild Semiconductor – Ultra Portable Video Filter Driver

January 2006
FMS6151
Ultra Portable Video Filter Driver
Features
■ 5th order 8MHz (SD) filter
■ Power down to 25nA
■ DC coupled input
■ AC or DC coupled output
■ DC coupled output eliminate need for AC coupling cap
■ SAG correction reduces size of AC coupling cap
■ Fixed gain of 6dB
■ Small, lead (Pb) free, Micropak^® packaging
Applications
■ Digital Still Cameras
■ Camera Phones
■ Personal Digital Assistants
■ Set Top Boxes
■ Digital Video Recorders
Description
The FMS6151 low cost, integrated, video filter is intended to
replace passive LC filters and drivers in low voltage portable
video applications. The 5th order filter provides better image
quality compared to typical 2nd and 3rd order passive solutions.
The FMS6151 is intended to be directly driven by a DC-coupled
DAC output. The output can drive an AC or DC-coupled doubly
terminated coax(150Ω) load. DC-coupling the output removes
the need for an expensive output coupling capacitor. If an AC-cou-
pled output is needed, the SAG correction circuit can be used to
reduce the AC output coupling capacitor value. Input DC levels
are offset by approximately 100mV. This internal level shift is
incorporated to prevent sync pulse clipping.
Offering SAG correction, fixed gain of 6dB, and a 5th order low
pass filter in a tiny space saving package (Micropak) makes the
FMS6151 well suited for space sensitive applications such as
cellular phones and digital cameras.
Block Diagram
V_cc = 2.5V to 5.25V
EN
VIN
+
8MHz,
5th order
-
VOUT
SAG
FMS6151 Rev. 1B
1
www.fairchildsemi.com