© Faraday Technology. As part of continual product improvement the specifications, details and dimensions shown in this publication are subject to change without notice

FARA096d

Page 1 of 2

Jul-03(E)

• Surface Mount Package

• Small size, low cost

• Selectable Sinx/x

• Luminance and Chrominance versions

This range of analogue filters has been designed for use in conjunction with a half band

interpolating/decimating filter such as the TRW2242 or with the many encoder chips available which employ

digital filtering and an output D to A converter. This type of digital filtering has good attenuation between the

frequencies of Fs/4 and 3Fs/4 where Fs is the Master Clock rate. When the normal clock rate of 27 MHz is

used for the luminance channel, the signal can be expected to have insignificant energy between 6.75 MHz and

20.25 MHz.

In order to preserve the integrity of the signal these filters have good amplitude and group delay characteristics

in the passband that meet requirements of CCIR601, but due to the above considerations do not have

significant attenuation below 21 MHz.

Order code

OBYPB

OBCPB

Filter Shape

Lowpass

Lowpass

Impedance

75

Ω

75

Ω

Sinx/x correction

No

No

Sampling Freq.

27.0 MHz

13.5 MHz

End of Passband

5.75 MHz

2.75 MHz

Amp. ripple to 5.50 MHz

< 0.05 dB

< 0.05 dB

to 5.75 MHz

< 0.1 dB

< 0.1 dB

G.D. ripple

< 6 ns

< 12 ns

Start of stopband

21.5 MHz

10.75 MHz

Stopband atten. wrt 100 kHz

> 40 dB

> 40 dB

Delay time nom. at 200 kHz

58 ns Flat

116 ns Flat

55 ns Sinx/x

110 ns Sinx/x

Aqueous Washable

Yes

Yes

SMD Reflow Limitations

refer to Data Sheet Fara309

Package

DR00326A

DR00326A

OB SERIES

VIDEO OVERSAMPLING SMD FILTERS