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Video filter/driver reduces system cost in video apps

Posted: 22 Jan 2007     Print Version  Bookmark and Share

Keywords:Fairchild Semiconductor  filter/driver  SC70 package  FMS6141 

Fairchild Semiconductor has introduced a single-channel video filter/driver with an 8kV ESD rating and SC70 package option. The FMS6141's active filtering approach improves system reliability and image quality compared to passive solutions and also lowers component count by approximately 20 per cent to help reduce test time, design time and inventory costs. The FMS6141 is suitable for applications that require single-channel video filtering and driving such as portable DVD players and printers for digital still cameras.

"Fairchild's single-channel FMS6141 offers designers a smaller-footprint option than discrete solutions or higher-channel-count video filter/drivers while providing robust 8kV ESD protection and excellent image quality," said Bill Boldt, Fairchild's senior marketing manager for Signal Conditioning Products. "The FMS6141 builds upon the success of Fairchild's previously introduced FMS6143, a 3-channel device that set the industry standard as the highest-performance, lowest-cost video filter/driver available. By adding the single-channel FMS6141 to its video filter/driver family, Fairchild offers designers the flexibility to target a wide range of applications from consumer to automotive."

As a 4th order video filter/driver the FMS6141 replaces 2nd or 3rd order passive devices typically used in digital consumer applications. This approach provides better in-band and stop-band filtering to reduce artefacts in video signals and enhance image quality.

Featuring an 8MHz cut-off frequency and 48dB of stopband attenuation, the FMS6141 meets standard definition (SD) video requirements and is flexible enough for use as an anti-aliasing or reconstruction video-out filter/driver. Its internal diode clamps and bias circuitry accommodate both AC- or DC-coupled input signals.

The FMS6141's high level of integration and tiny SC70 package option reduce board space compared to typical solutions. By driving either AC- or DC-coupled single or dual coaxial cable loads it eliminates the need for expensive output coupling capacitors. And by providing built-in 8kV ESD protection the FMS6141 increases reliability while lowering component count compared to discrete designs that require external ESD-protection diodes.

In addition to the single-channel FMS6141, Fairchild's line of high-performance, compact video filter/drivers includes the FMS6143 (3-channel), FMS6145 (5-channel), and the FMS6146 (6-channel) devices. The FMS6141 is available in SC70-5 or SOIC-8 packages. This lead (Pb)-free device meets or exceeds the requirements of the joint IPC/JEDEC standard J-STD-020C and is compliant with European Union regulations now in effect.

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