Vestigial Sideband Filters VESTIGIAL SIDEBAND FILTERS For Professional Applications Replaces August 1992, version CT3447-1.2 DS5513-1.0 January 2002 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 DW1401-G DW1404-G DW1406-G DW1408-G DW1409-G DW1411-G DW2501-G B/G B/G B/G B/G B/G B/G B/G None 1 None Stereo Stereo None A A A A D A A DW1502-I DW1503-I DW1505-I DW9231-I DW9232-I I I I I I 1 1 1 1 None A A A D D DW1603-M DW1605-M M M None 1 D D DW1701-K DW1702-K K K None 1 A A NICAM Sound Filter NICAM Vision Filter PACKAGE STYLE 1/8 www.dynexsemi.com Vestigial Sideband Filters ELECTRICAL CHARACTERISTICS Test Conditions (unless otherwise stated): Temperature = +23°C ±2°C Load and source impedances = 50Ω SYSTEM B/G FILTERS Passband DW1401-G DW1404-G DW1406-G DW1408-G DW1409-G DW1411-G DW2501-G Typ Typ Typ Typ Typ Typ Typ Max 34.4 to 39.4 Max 33.65 to 38.9 Max 34.4 to 39.4 Insertion Loss 29 32 29 32 30 32 Passband Ripple ±0.3 ±0.5 ±0.4 ±0.5 ±0.15 ±0.2 Group Delay Ripple 45 60 50 60 40 50 Sound SYSTEM I FILTERS Passband None 1 Channel DW1502-I Typ Max 34.25 to 41.25 Typ Max 29 30 29 30 Passband Ripple ±0.15 ±0.25 ±0.15 Group Delay Ripple 30 40 30 32 40 48 50 ns p-p Max Typ Units MHz ±0.3 dB 40 40 ns p-p 1 Channel 1 Channel 29 - DW1701-K Units SYSTEM K FILTERS MHz Passband dB Insertion Loss 25 ±0.5 ±0.5 ±0.5 dB Passband Ripple 50 40 ns p-p Group Delay Ripple - Sound 1 Channel dB None Passband Ripple None Max 32.1 to 33.0 Group Delay Ripple Sound - ±0.3 40.75 to 46.5 26 dB 60 Max dB ±0.5 DW9232-I 33.55 to 38.9 29 28 Stereo DW9231-I Typ 33 ±0.5 DW1605-M 30 Max MHz ±0.4 40 Stereo 24 40 DW1603-M Insertion Loss 32 Units ±0.5 ±0.2 SYSTEM M FILTERS 42.17 to 46.25 29 Max 33.15 to 39.65 30 None Passband 32 Max 30 1 Channel Typ 33.65 to 39.15 ±0.2 DW1505-I Typ Max 30 Sound Max 29 33.4 to 40.9 Insertion Loss Typ 33.15 to 38.9 None DW1503-I Max Typ Max 30.5 to 38.25 26 Typ Max 29.0 to 38.5 32 Units MHz 26 dB 40 ns p-p ±0.5 40 None DW1702-K dB 1 Channel - ABSOLUTE MAXIMUM RATINGS Storage and Operating Temperature = -10°C to +70°C Maximum Voltage = See Operating Note 1 Input Power = +20dBm 2/8 www.dynexsemi.com Vestigial Sideband Filters OPERATING NOTES 1. Coupling Capacitors 3. Mounting Precautions Although there is no DC path within the SAW filter it is advisable to keep any applied DC voltage to <100mV. 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. 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. 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 3/8 www.dynexsemi.com Vestigial Sideband Filters Fig.2 - DW1406-G Fig.3 - DW1408-G 4/8 www.dynexsemi.com Vestigial Sideband Filters Fig.4 - DW1411-G Fig.5 - DW1502-I 5/8 www.dynexsemi.com Vestigial Sideband Filters Fig. 6 - DW1503-I PACKAGE DETAILS 14243 14243 2 3 4 10 11 12 14 15 16 22 23 24 Gnd Input 12 13 Gnd Output 2.54 (0.100) 39.118 (1.540) MAX Gnd Note: BP1121 only - Input Pin 1 Output Pin 12 24 1 15.24 (0.600) NOM 0.53 (0.021) MAX 6.35 (0.250) MIN 4.70 (0.185) Package Type A 20.708 (0.815) 6/8 www.dynexsemi.com Vestigial Sideband Filters 2.41 (0.095) REF 14243 Input Gnd Output 14243 1 2 3 4 5 6 7 8 25.40 (1.000) Gnd 20.32 (0.800) 39.118 (1.540) MAX 4 5 3 6 5.08 (0.200) REF 2 33.02 (1.300) 1 7 8 20.32 (0.800) PINS 0.46 (0.018) DIA 5.08 (0.200) 5.08 (0.200) Package Type D 26.158 (1.030) MAX 7/8 www.dynexsemi.com http://www.dynexsemi.com e-mail: [email protected] HEADQUARTERS OPERATIONS DYNEX SEMICONDUCTOR LTD Doddington Road, Lincoln. Lincolnshire. LN6 3LF. United Kingdom. Tel: +44-(0)1522-500500 Fax: +44-(0)1522-500550 CUSTOMER SERVICE Tel: +44 (0)1522 502753 / 502901. Fax: +44 (0)1522 500020 SALES OFFICE Tel: +44 (0)1522 502724. 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 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. 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. www.dynexsemi.com