4th-order video filter IC surpasses passive LC performance

South Portland, Maine—Fairchild's 4th-order, single-channel video filter/driver, which offers an 8 kV ESD rating and SC70 package option, touts better performance at lower cost than passive LC filters for 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 8 kV ESD protection and excellent image quality,” said Bill Boldt, senior marketing manager for Signal Conditioning Products. “By adding the single-channel FMS6141 to its video filter/driver family (which also includes the 3-channel FMS6143, 5-channel FMS6145, and 6-channel FMS6146 devices), Fairchild offers designers the flexibility to target a wide range of applications from consumer to automotive.”

As a 4th-order active filter/driver, the FMS6141, versus 2nd- and 3rd-order passive solutions used in digital consumer applications, is designed to provide better in-band and stopband filtering to reduce artifacts in video signals. Featuring an cut-off frequency of 8 MHz and 48 dB 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.

As for size, the FMS6141's high level of integration and SC70 package option reportedly reduce total board space by up to 20 percent over competing solutions. The chip's AC- or DC-coupled single (150-ohm) or dual (75-ohm) coaxial cable loads eliminate the need for expensive output coupling capacitors. In addition, the device's internal 8 kV ESD protection boosts reliability while doing away with the need for external ESD-protection diodes.

Click here for the device datasheet. The chip, whose basic version is available in an (Pb-free) SOIC-8 package, is priced at 14 cents each in 1k pieces. Availability is 12 weeks ARO. Click here for additional information.

Fairchild Semiconductor , 1-408-822-2279,

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