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| Data Sheet Features * * * * * Usable bandwidth of 9 MHz High attenuation Single-ended operation at 50 Ceramic Surface Mount Package (SMP) Small size Part Number 855271 479.75 MHz SAW Filter * Package Surface Mount 7.01 x 5.51 x 1.63 mm Pin Configuration Bottom View 1 2 3 12 0.76 1.63 NOM. 1.78 MAX. 4 5 6 11 10 7.01 1.27 9 8 7 1.70 5.51 1.27 Pin No. 3 9 1,2,4,5,6,7 8,10,11,12 Description Output Input Case Ground Case Ground 0.79 1.14 Dimensions shown are nominal in millimeters All tolerances are 0.15mm except overall length and width 0.13mm Body: Al2O3 ceramic Lid: Kovar, Ni plated Terminations: Au plating 0.5 - 1.0m, over a 2 - 6m Ni plating Subject to change or obsolescence without notice Rev A 25-Jul-2003 Page 1 of 5 Data Sheet Part Number 855271 479.75 MHz SAW Filter Electrical Specifications (1,2,3) Parameter (4) Center Frequency Insertion Loss 3 dB Bandwidth (5) 35 dB Bandwidth (5) Passband Variation (6) Group Delay Variation 475.25 - 484.25 MHz Source Impedance (7) Load Impedance (7) Temperature Coefficient (3) Substrate Material Notes: 1. 2. 3. 4. 5. 6. 7. Minimum 9 - Typical 479.75 19.5 11.7 19.9 0.38 26 50 50 -23 LiTaO3 Maximum 22 22 1 50 - Unit MHz dB MHz MHz dB p-p nsec ppm/ oC - All specifications are based on the test circuit shown below This specification is valid for room temperature only Device will function over an operating temperature of -40 to 85 oC, but may not meet the above ambient specification. Insertion loss and frequency shift performance will change over temperature. See coefficient of temperature for frequency shift estimation. Electrical margin has been built into the design to account for the variations due to manufacturing tolerances Referenced to insertion loss at 479.75 MHz Referenced to 100% of 1dB bandwidth This is the optimum impedance in order to achieve the performance shown Test Circuit: Actual matching values may vary due to PCB layout and parasitics 12pF 9 3 50 50 Single-ended 50 39pF 1,2,4,5,6,7 8,10,11,12 Subject to change or obsolescence without notice Rev A 25-Jul-2003 Page 2 of 5 Data Sheet Part Number 855271 479.75 MHz SAW Filter Typical Performance (at +25oC) Subject to change or obsolescence without notice Rev A 25-Jul-2003 Page 3 of 5 Data Sheet Actual matching values may vary due to PCB layout and parasitics 12pF 9 3 Part Number 855271 479.75 MHz SAW Filter Matching Schematics 50 Single-ended 50 39pF 1,2,4,5,6,7 8,10,11,12 50 Marking 1.34 PCB Footprint .99 .28 1.34 .28 Date code ID dot SAWTEK 855271 XXXXXX 5.71 .99 7.21 The date code consists of: day of the current year (Julian, 3 digits), last digit of the year (1 digit) and hour (2 digits) This footprint represents a recommendation only Dimensions shown are nominal in millimeters Tape and Reel 2.7 16.8 O330 ID dot 0.3 2.0 4.0 O1.5 A 1.75 7.5 7.3 16.0 O102 Direction of travel O20.2 O13.0 2.0 2.2 Section A-A 5.8 8.0 O1.5 A Dimensions shown are nominal in millimeters Packaging quantity: 3000 units/reel Subject to change or obsolescence without notice Rev A 25-Jul-2003 Page 4 of 5 Data Sheet Parameter Operating Temperature Range Storage Temperature Range Part Number 855271 479.75 MHz SAW Filter Maximum Ratings Symbol T Tstg Minimum -40 -40 Maximum +85 +85 Unit o o C C Warnings * * Electrostatic Sensitive Device (ESD) Avoid ultrasonic exposure Links to Additional Technical Information PCB Layout Tips S-Parameters Qualification Flowchart Soldering Profile Other Technical Information Sawtek's liability is limited only to the Surface Acoustic Wave (SAW) component(s) described in this data sheet. Sawtek does not accept any liability for applications, processes, circuits or assemblies which are implemented using any Sawtek component described in this data sheet. Contact Information PO Box 609501 Orlando, FL 32860-9501 USA Subject to change or obsolescence without notice Phone: +1 (407) 886-8860 Fax: +1 (407) 886-7061 Email: custservice@sawtek.com Web: www.sawtek.com Rev A Or contact one of our worldwide network of sales offices, representatives or distributors 25-Jul-2003 Page 5 of 5 |
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