vestigial sideband filters 1/8 www.dynexsemi.com dynex semiconductor's range of surface acoustic wave filters provide if filtering for most current tv systems. the filters are designed for use in tv modulators and transposers, and are available without sound, with one sound channel, or with stereo sound. features filters for system b/g, i, m & k tv standards linear phase characteristics low amplitude and group delay ripple sidelobe levels better than 50db hermetically sealed package filter system sound remarks package style dw1401-g b/g none a dw1404-g b/g 1 a dw1406-g b/g none a dw1408-g b/g stereo a dw1409-g b/g stereo d dw1411-g b/g a dw2501-g b/g none a dw1502-i i 1 a dw1503-i i 1 a dw1505-i i 1 a dw9231-i i 1 nicam sound filter d dw9232-i i none nicam vision filter d dw1603-m m none d dw1605-m m 1 d dw1701-k k none a DW1702-K k 1 a vestigial sideband filters for professional applications replaces august 1992, version ct3447-1.2 ds5513-1.0 january 2002
vestigial sideband filters 2/8 w ww.dynexsemi.com electrical characteristics test conditions (unless otherwise stated): temperature = +23 c 2 c load and source impedances = 50 ? system b/g filters dw1401-g dw1404-g dw1406-g dw1408-g dw1409-g dw1411-g dw2501-g units typ max typ max typ max typ max typ max typ max typ max passband 34.4 to 39.4 33.65 to 38.9 34.4 to 39.4 33.15 to 38.9 33.65 to 39.15 33.15 to 39.65 mhz insertion loss 29 32 29 32 30 32 29 32 29 32 24 33 28 db passband ripple 0.3 0.5 0.4 0.5 0.15 0.2 0.2 0.5 0.4 0.5 db group delay ripple 45 60 50 60 40 50 40 40 48 50 ns p-p sound none 1 channel none stereo stereo - system m filters dw1603-m dw1605-m units typ max typ max passband 42.17 to 46.25 40.75 to 46.5 mhz insertion loss 30 32 26 29 db passband ripple 0.5 0.5 db group delay ripple 50 40 ns p-p sound none 1 channel - system k filters dw1701-k DW1702-K units typ max typ max passband 30.5 to 38.25 29.0 to 38.5 mhz insertion loss 25 26 32 26 db passband ripple 0.5 0.5 db group delay ripple 40 40 ns p-p sound none 1 channel - system i filters dw1502-i dw1503-i dw1505-i dw9231-i dw9232-i units typ max typ max typ max typ max typ max passband 34.25 to 41.25 33.4 to 40.9 33.55 to 38.9 32.1 to 33.0 mhz insertion loss 29 30 29 30 29 30 30 30 db passband ripple 0.15 0.25 0.15 0.2 0.5 0.3 0.3 db group delay ripple 30 40 30 40 60 40 40 ns p-p sound 1 channel none 1 channel 1 channel none - absolute maximum ratings storage and operating temperature = -10 c to +70 c maximum voltage = see operating note 1 input power = +20dbm
vestigial sideband filters 3/8 www.dynexsemi.com operating notes 1. coupling capacitors although there is no dc path within the saw filter it is advisable to keep any applied dc voltage to <100mv. prolonged exposure to voltages in excess of this may adversely affect the life of the filter. short-term exposure to voltages up to 30 volts should not cause any problems. 2. temperature effects the characteristics of saw filters of this type behave in a simple predictable manner with temperature. the temperature coefficient of frequency is -90ppm/ c. for example the rejection at 45 c and 40.15mhz will be the same as that at 25 c and 40.22mhz. 3. mounting precautions in order to achieve the quoted rejections it is important to prevent excessive direct breakthrough signals. normal high frequency precautions such as the use of continuous ground plane and short component leads are necessary. it is most important that the saw filter is well grounded. all the earth leads on the package should be connected to the ground plane by short connections - plated through holes are ideal. direct breakthrough signals produce two main effects: ?specified out of band rejections not achieved ?passband ripple is excessive a simple method to check that the grounding is adequate is to connect the package directly to the ground plane temporarily, and check that the frequency response does not change. plots fig.1 - dw1404-g
vestigial sideband filters 4/8 w ww.dynexsemi.com fig.3 - dw1408-g fig.2 - dw1406-g
vestigial sideband filters 5/8 www.dynexsemi.com fig.5 - dw1502-i fig.4 - dw1411-g
vestigial sideband filters 6/8 w ww.dynexsemi.com fig. 6 - dw1503-i package details 2gnd 3 input 4 10 11 gnd 12 14 15 output 16 22 23 24 note: bp1121 only - input pin 1 output pin 12 14243 14243 gnd package type a 12 24 13 6.35 (0.250) min 20.708 (0.815) 4.70 (0.185) 15.24 (0.600) nom 0.53 (0.021) max 39.118 (1.540) max 2.54 (0.100) 1
vestigial sideband filters 7/8 www.dynexsemi.com 1 input 2 3gnd 4 5 output 6 7gnd 8 package type d 14243 14243 4 1 8 3 2 7 5 6 5.08 (0.200) 26.158 (1.030) max 5.08 (0.200) 20.32 (0.800) pins 0.46 (0.018) dia 20.32 (0.800) 25.40 (1.000) 39.118 (1.540) max 2.41 (0.095) ref 5.08 (0.200) ref 33.02 (1.300)
www.dynexsemi.com customer service tel: +44 (0)1522 502753 / 502901. fax: +44 (0)1522 500020 sales office tel: +44 (0)1522 50 27 24 . fax: +44 (0)1522 502777 these offices are supported by representatives and distributors in many countries world-wide. ?dynex semiconductor 2002 technical documentation ?not for resale. produced in united kingdom headquarters operations dynex semiconductor ltd doddington road, lincoln. lincolnshire. ln6 3lf. united kingdom. tel: +44-(0)1522-500500 fax: +44-(0)1522-500550 this publication is issued to provide information only which (unless agreed by the company in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. no warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. the company reserves the right to alter without prior notice the specification, design or price of any product or service. information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. it is the user's responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. these products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. all products and materials are sold and services provided subject to the company's conditions of sale, which are available on request. all brand names and product names used in this publication are trademarks, registered trademarks or trade names of their respective owners. http://www.dynexsemi.com e-mail: space_comms@dynexsemi.com datasheet annotations: dynex semiconductor annotate datasheets in the top right hard corner of the front page, to indicate product status. the annotations are as follows:- target information: this is the most tentative form of information and represents a very preliminary specification. no actual design work on the product has been started. preliminary information: the product is in design and development. the datasheet represents the product as it is understood but details may change. advance information: the product design is complete and final characterisation for volume production is well in hand. no annotation: the product parameters are fixed and the product is available to datasheet specification.
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