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

Fara368d

Page 1 of 3

Sep-02(A)

• Reflowable

• Washable

• Surface mount compatibility

• Small size, low cost

• Flat or Sinx/x versions

• Luminance and Chrominance versions

With reduced analogue filter costs resulting from oversampling techniques, there is an increased

need for manufacturing facilities to avoid the large production costs associated with the presently

available through hole packages. The Faraday RA range of oversampling filters can be used in

surface mount assembly lines allowing vacuum pick up and reflow (see Page 2).

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 a good amplitude and group delay

characteristics in the passband, similar to the requirements of CCIR601 but due to the above

considerations do not have significant attenuation below 21 MHz.

Order code:

RAYSA

RAYFA

RACSA

RACFA

Impedance

75

Ω

75

Ω

75

Ω

75

Ω

Sinx/x correction

Yes

No

Yes

No

Sampling Freq.

27.0 MHz

27.0 MHz

13.5 MHz

13.5 MHz

End of Passband

5.75 MHz

5.75 MHz

2.75 MHz

2.75 MHz

Amp. ripple

< 0.25 dB

< 0.12 dB

< 0.30 dB

< 0.12 dB

G.D. ripple

< 10 ns

< 6 ns

< 20 ns

< 12 ns

Start of stopband

21.5 MHz

21.5 MHz

10.75 MHz

10.75 MHz

> 40 dB

> 40 dB

> 40 dB

> 40 dB

27 ns

30 ns

50 ns

58 ns

Aqueous Washable

Yes

Yes

Yes

Yes

Package

DR00274A

DR00274A

DR00274A

DR00274A

RA SERIES

VIDEO OVERSAMPLING SMD

FILTERS