? faraday technology. as part of continual product improvement the specifications, details and dimensions shown in this publication are subject to change without notice fara084d page 1 of 2 jul - 03 (e) surface mount package small size, low cost flat or sinx/x versions 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 obysb obyfb OBCSB obcfb filter shape lowpass lowpass lowpass lowpass impedance 75 w 75 w 75 w 75 w 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 to 5.5 mhz < 0.05 db < 0.05 db < 0.05 db < 0.05 db to 5.75 mhz < 0.1 db < 0.1 db < 0.1 db < 0.1 db g.d. ripple < 6 ns < 6 ns < 12 ns < 12 ns start of stopband 21.5 mhz 21.5 mhz 10.75 mhz 10.75 mhz stopband atten. wrt 100 khz > 40 db > 40 db > 40 db > 40 db delay time nom. at 200 khz 55 ns 58 ns 110 ns 116 ns aqueous was hable yes yes yes yes smd reflow limitations refer to data sheet fara309 package dr00325a ob series video oversampling s md filters
package detail faraday technology ltd. tel: + 44 (0)1782 661501 croft road industrial estate, fax: + 44 (0)1782 630101 newcastle, staffordshire email: sales@faradaytech.co.uk st5 0qz. england. web site: http://www.faradaytech.co.uk fara084d page 2 of 2 jul - 03 (e)
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