VIDEO OVERSAMPLING SMD FILTERS OC SERIES The OC series range of video oversampling SMD 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. • Surface mount compatible • Flat or Sinx/x versions • Small size, low cost • 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 throughhole packages. The Faraday OC range of oversampling filters can be used in surface mount assembly lines allowing vacuum pick up and reflow. In order to preserve the integrity of the signal these filters have a good amplitude and group delay characteristics in the passband which meet requirements of CCIR601 but due to the above considerations do not have significant attenuation below 21 MHz. Order code OCYSA OCYFA OCCSA OCCFA Impedance Sinx/x correction 150 Ω Yes 150 Ω No 150 Ω Yes 150 Ω 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 (dB) < 0.05 to 5.5 MHz < 0.05 to 5.5 MHz < 0.1 to 5.75 MHz < 0.1 to 5.75 MHz < 0.1 to 2.75 MHz < 0.1 to 2.75 MHz 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 Delay time nom. at 200 kHz > 40 dB >40 dB > 40 dB > 40 dB 55 ns 58 ns 110 ns 116 ns Aqueous Washable Yes Yes Yes Yes SMD Reflow Limitations refer to Data Sheet Fara309 © Faraday Technology. As part of continual product improvement the specifications, details and dimensions shown in this publication are subject to change without notice FARA095d Page 1 of 2 Sep-05(C) PACKAGE DETAIL Package Faraday Technology Ltd. Croft Road Industrial Estate, Newcastle, Staffordshire ST5 0QZ. England. FARA095d DR00325A DR00325A DR00325A Tel: Fax: Email: Web site: Page 2 of 2 DR00325A + 44 (0)1782 661501 + 44 (0)1782 630101 [email protected] http://www.faradaytech.co.uk Sep-05(C) PACKAGE DETAIL All dimensions in millimetres (inches). Gen Tolerance ± 0,05 (0.002) unless otherwise stated. DO NOT SCALE © Faraday Technology Ltd Croft Road Newcastle-U-Lyme ST5 0QZ England Tel (044) 01782 661501 Fax 630101 25,6 (1.01) 7 O/ALL Third Angle Projection 17,78 (0.7) 0,35 2,54 (0.1) Typ 0,7 12,8 (0.504) 9 9,95 (0.39) 16 0,85 (0.033) 3,91 (0.15) TOP VIEW 1 8 0,46 (0.018) Typ Template: DT00291 Change Note No; Auth: C Snell Date: 25/09/01 Faraday Technology Ltd. Croft Road Industrial Estate, Newcastle, Staffordshire ST5 0QZ. England. FARA095d Date: 25/09/01 Title: Drg No: FILTER ASSY OUTLINE Tel: Fax: Email: Web site: Page 2 of 2 DR00325A + 44 (0)1782 661501 + 44 (0)1782 630101 [email protected] http://www.faradaytech.co.uk Sep-05(C) A4DRGBLK.C DR Notes. a. Surface Mount terminals;- 0,254 Alloy 42 5-10µ bright Sn90 tin-plating per MIL-T-10727, meeting solderability requirements of MIL STD 202F Method 208F. b. Pin assignments;- Pin 1 = Input. Pin 8 = Output. Pin 7 = Open circuit. Connected internally. All remaining pins = Gnd.