855975

Data Sheet Features • • • • • • • For WLAN applications Usable bandwidth of 17 MHz Low loss High attenuation at tones Single-ended or balanced operation Ceramic Surface Mount Package (SMP) Small size Part Number 855975 280 MHz SAW Filter • Package Surface Mount 5.00 x 5.00 x 1.32 mm Pin Configuration Bottom View 1 2 3 1.32 NOM. 1.52 MAX. 5.00 1.27 0.66 8 4 7 6 5 5.00 1.27 Pin No. 2 3 6 7 1,4,5,8 Description Input return Input Output return Output Case ground 2.08 0.64 Dimensions shown are nominal in millimeters All tolerances are ±0.15mm except overall length and width ±0.15/±0.10mm Body: Al2O3 ceramic Lid: Kovar, Ni plated Terminations: Au plating 0.5 - 1.0µm, over a 2 - 6µm Ni plating Subject to change or obsolescence without notice Rev A 07-Dec-2001 Page 1 of 5 Data Sheet Operating Temperature Range: (2) -10 to +50 oC Part Number 855975 280 MHz SAW Filter Electrical Specifications (1) Parameter (3) Center Frequency, f0 Insertion Loss at 280 MHz Lower 3 dB Point (4) Upper 3 dB Point Passband Ripple 271.5 - 288.5 MHz Group Delay Variation 271.5 - 288.5 MHz Stopband Rejection (4) 10 - 250 MHz 310 - 340 MHz 340 - 500 MHz Source Impedance: (5) Load Impedance: (5) Notes: 1. 2. 3. 4. 5. Minimum 288.5 40 38 40 - Typical 280 8.95 269.1 291.1 0.6 40 43 40 42 50 50 Maximum 10 271.5 1 100 - Unit MHz dB MHz MHz dB p-p ns dB dB dB Ω Ω All specifications are based on the test circuit shown below In production, devices will be tested at room temperature to a guardbanded specification to ensure electrical compliance over temperature Electrical margin has been built into the design to account for the variations due to temperature drift and manufacturing tolerances Relative to insertion loss at 280 MHz This is the optimum impedance in order to achieve the performance shown Test Circuit: 12nH 3 7 18pF 1,2,4,5,6,8 50Ω 15nH 50Ω Single-ended 50Ω 10pF Subject to change or obsolescence without notice Rev A 07-Dec-2001 Page 2 of 5 Data Sheet Part Number 855975 280 MHz SAW Filter Typical Performance (at +25oC) Subject to change or obsolescence without notice Rev A 07-Dec-2001 Page 3 of 5 Data Sheet Actual matching values may vary due to PCB layout and parasitics 12nH 3 7 15nH Part Number 855975 280 MHz SAW Filter Matching Schematics 50Ω Single-ended 50Ω 10pF 1,2,4,5,6,8 18pF 50Ω Marking 2.28 Sawtek logo Marking code PCB Footprint 5.20 1.47 J JJJYM .84 .71 ID dot Date code .43 .84 1.47 The date code consists of: JJJ = Julian day, Y = last digit of year, M = manufacturing site code This footprint represents a recommendation only Dimensions shown are nominal in millimeters Tape and Reel 2.7 12.8 Ø330 ID dot 0.3 2.0 4.0 Ø1.5 A 1.75 5.5 Sawtek logo Ø102 Ø20.2 Ø13.0 2.0 Direction of travel 5.25 1.8 Section A-A 5.25 8.0 Ø1.5 A 12.0 Dimensions shown are nominal in millimeters Packaging quantity: 4000 units/reel Subject to change or obsolescence without notice Rev A 07-Dec-2001 Page 4 of 5 Data Sheet Maximum Ratings Parameter Operating Temperature Range Storage Temperature Range Part Number 855975 280 MHz SAW Filter Symbol T Tstg Minimum -10 -40 Maximum +50 +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 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 07-Dec-2001 Page 5 of 5