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Active approach reduces video system complexity

Edited by the Electronicstalk editorial team Dec 6, 2004

A new family of highly integrated video filter/drivers can replace as many as 80 parts to help designers reduce pick-and-place design costs and cut board space by up to 20% in video applications.

A new family of highly integrated video filter/drivers can replace as many as 80 parts to help designers reduce pick-and-place design costs and cut board space by up to 20% in video applications.

The new Fairchild FMS6143, FMS6145 and FMS6146 multichannel devices feature fully integrated functionality, offering video designers an active approach that provides a number of design benefits.

Compared with typical passive approaches, the FMS6143, FMS6145 and FMS6146 significantly reduce test and design time, reduce inventory and increase image quality in DVD, LCD, TV, set-top box and other digital consumer products.

These integrated video filter/drivers also eliminate the need for multiple discrete components.

"Fairchild's integrated video filter/drivers offer more compact and reliable alternatives over discrete passive filter solutions, opening up new opportunities in high-volume applications", says Ben Takada, Fairchild's Application Engineering Manager for Video Products.

"The world's leading OEMs in digital consumer applications are already embracing this family of video filter/drivers based on the performance and cost-competitive benefits these devices provide".

The three-, five- and six-channel, fourth-order filter/drivers improve image quality when used to replace discrete products in traditional 3rd order passive solutions.

Compared to passive designs, they provide better inband and stopband filter characteristics that reduce artefacts in video signals and result in higher image quality.

By providing 8MHz cutoff frequency and 48dB stopband attenuation, these devices meet standard definition (SD) video requirements, while allowing them to be used as anti-aliasing or reconstruction video out filter drivers.

Internal diode clamps and bias circuitry enable the video filter/drivers to accommodate AC- or DC-coupled input signals.

The outputs on each device can drive AC- or DC-coupled single (150ohm) or dual (75ohm) coaxial cable loads, eliminating the need for expensive output coupling capacitors and reducing design cost.

The FMS6143, FMS6145 and FMS6146 are available in SOIC and TSSOP packages.

These products are lead-free (Pb-free) and meet or exceed the requirements of the joint IPC/JEDEC standard J-STD-020B and are compliant with the European Union requirements that will take effect in 2005.