RF TRANSFORMER For Wideband RF Applications For single-ended to balanced applications Value-oriented construction Small surface mount package Excellent insertion loss Various impedance ratios available Electrical Specifications @ 25°C — Operating Temperature -40°C to +85°C Part Number Impedance Ratio1 Pri:Sec (±2%) Turns Ratio1 Pri:Sec (±2%) Bandwidth 2, 3 (MHz TYP) Insertion Loss @ Midband (dB) Schematic CX2078 1:1 1:1 5-500 0.6 A CX2081 1:1.5CT 1:1.2CT 5-125 0.9 B NOTE: Optional Tape & Reel packaging can be ordered by adding a “T” suffix to the part number (ex: CX2078T). Mechanical Schematics CX2078/CX2081 A .169 ± .004 4,30 ± 0,10 .106 2,69 .209 ± .004 5,30 ± 0,10 CX2078/81 Date Code Country of Origin .114 2,90 .236 6,00 3 4 1 6 1 B 6 2 3 Pin 1 .028 ± .004 0,71 ± 0,10 .059 1,50 .118 3,00 .059 1,50 .118 3,00 5X .039 1,00 SUGGESTED PAD LAYOUT SEC:PRI 4 Weight . . . . . . . . . . . . . .0.43 grams Tape & Reel . . . . . . . . . .2200 /reel Tray . . . . . . . . . . . . . . . . .100 /tray Dimensions: Inches mm Unless otherwise specified, all tolerances are ± .010 0,25 +.018 .118 .012 3,00 +0,46 0,30 .002/0,05 5 SURFACES .003 ± .002 0,08 ± 0,05 5X .030 0,76 5X 0° 8° US 858 674 8100 UK 44 1483 401 700 France 33 3 84 35 04 04 Singapore 65 287 8998 Taiwan 886 2 2698 0228 Hong Kong 852 2788 6588 http://www.pulseeng.com · · · · · · PRELIMINARY C215.P (1/02) RF TRANSFORMER For Wideband RF Applications Application Notes A. Bandwidth specifications are typical in a 75 W system. B. Materials used in the products are UL94-V0 recognized. Products meet requirements of IEC 695-2-2 (Needle Flame Test). C. For additional impedance ratios and frequency ranges, please contact Applications Engineering. D. CX2031 is designed to support 190 mA dc bias at center tap. Notes from Tables 1. Impedance and turns ratios are specified primary:secondary. (CT=Center Tap). 3. These transformers are verified to operate from -40°C to +85°C. Contact Applications Engineering for performance data. Insertion Loss (dB) Insertion Loss (dB) 2. Bandwidth is referenced to midband loss. CX2078 - Typical Insertion Loss 0 1 2 3 4 0.1 1 10 Frequency (MHz) 100 500 100 500 CX2081 - Typical Insertion Loss 0 1 2 3 4 0.1 1 10 Frequency (MHz) For More Information : UNITED STATES (Worldwide) UNITED KINGDOM (Northern Europe) FRANCE SINGAPORE (Southern Europe) (Southern Asia) TAIWAN, R.O.C. (Northern Asia) HONG KONG (China/Hong Kong) 12220 World Trade Drive San Diego, CA 92128 U.S.A. http://www.pulseeng.com TEL: 858 674 8100 FAX: 858 674 8262 1 & 2 Huxley Road The Surrey Research Park Guildford, Surrey GU2 5RE United Kingdom TEL: 44 1483 401700 FAX: 44 1483 401701 Zone Industrielle F-39270 Orgelet France TEL: 33 3 84 35 04 04 FAX: 33 3 84 25 46 41 3F-4, No. 81, Sec. 1 HsinTai Wu Road Hsi-Chih, Taipei Hsien Taiwan, R.O.C. Tel: 886 2 2698 0228 FAX: 886 2 2698 0948 19/F, China United Plaza 1008 Tai Nan West Street Cheung Sha Wan, Kowloon Hong Kong, China TEL: 852 2788 6588 FAX: 852 2776 1055 150 Kampong Ampat #07-01/02 KA Centre Singapore 368324 TEL: 65 287 8998 FAX: 65 280 0080 DISTRIBUTOR Performance warranty of products offered on this data sheet is limited to the parameters specified. Data is subject to change without notice. Other brand and product names mentioned herein may be trademarks or registered trademarks of their respective owners. Printed on recycled paper. ©2002, Pulse Engineering, Inc. PRELIMINARY C215.P (1/02)