Document 425-1 Wideband Transformers These wideband transformers are offered in tapped or untapped configurations in a low-profile DIP-style plastic case. They are available in a through-hole version compatible with standard DIP sockets and a surface mount version that is packaged in tape and reel. All parts feature 500 V isolation, 250 mA current handling capability and a 1/4 Watt RF power rating. (For a smaller package size, see our WBC Series.) Applications include impedance matching, voltage or current transformation, DC isolation, balanced/unbalanced mixing, matching, power splitting, coupling and signal inversion. Custom wideband transformers with special combinations of impedance ratio, insertion loss, frequency response and current handling are also available. Free evaluation samples are available by contacting Coilcraft or by visiting www.coilcraft.com. Schematic 6 1 4 3 6 1 2 4 3 6 1 5 2 4 3 Part number SM1 TH WB1-1LS_ WB1-1L WB1-6LS_ WB1-6L WB1.18-3LS_ WB1.18-3L WB1.5-6LS_ WB1.5-6L WB2-1-2WLS_ WB2-1-2WL WB2.5-6LS_ WB2.5-6L WB4-6LS_ WB4-6L WB9-1LS_ WB9-1L WB16-1LS_ WB16-1L WB36-1LS_ WB36-1L WB1-1TLS_ WB1-1TL WB1-6TLS_ WB1-6TL WB2-1TLS_ WB2-1TL WB2.5-6TLS_ WB2.5-6TL WB3-1TLS_ WB3-1TL WB4-1HLS_ WB4-1HL WB4-6TLS_ WB4-6TL WB5-1TLS_ WB5-1TL WB8-1TLS_ WB8-1TL WB13-1TLS_ WB13-1TL WB16-6TLS_ WB16-6TL WBT1-6LS_ WBT1-6L WBT1.5-1LS_ WBT1.5-1L WBT2.5-6LS_ WBT2.5-6L WBT4-1LS_ WBT4-1L WBT4-1ALS_ WBT4-1AL WBT16-1LS_ WBT16-1L WBT25-1LS_ WBT25-1L Impedance ratio pri : sec 1:1 1:1 1 : 1.18 1 : 1.5 1:2 1 : 2.5 1:4 1:9 1 : 16 1 : 36 1:1 1:1 1:2 1 : 2.5 1:3 1:4 1:4 1:5 1:8 1 : 13 1 : 16 1:1 1 : 1.5 1 : 2.5 1:3 1:4 1 : 16 1 : 25 Pins 4 - 6 Insertion Bandwidth loss max L min2 DCR max3 (MHz) (dB) (H) (mOhm) 0.150 - 500 0.70 27 75 0.100 - 350 0.50 25 100 0.040 - 300 0.50 90 300 0.050 - 325 0.26 56 120 0.080 - 700 1.00 38 100 0.080 - 225 0.26 30 100 0.100 - 125 0.50 25 100 0.125 - 125 0.57 25 100 0.050 - 100 0.60 56 75 0.100 - 45 0.50 25 50 0.100 - 375 0.51 25 100 0.050 - 200 0.20 70 150 0.070 - 400 1.00 38 100 0.050 - 125 0.28 56 120 0.040 - 500 0.40 96 110 0.100 - 500 0.50 25 120 0.050 - 200 0.50 43 120 0.050 - 400 0.30 48 220 0.150 - 400 0.76 18 100 0.150 - 125 0.72 17 90 0.050 - 100 0.60 56 75 0.040 - 200 0.25 70 150 0.040 - 350 0.30 60 150 0.050 - 100 0.26 70 150 0.040 - 150 0.26 45 120 0.040 - 350 0.40 96 110 0.100 - 100 0.50 25 100 0.100 - 65 0.50 25 100 1. When ordering, please specify packaging code: WB25-1LSD Packaging: D = 13 machine-ready reel. EIA-481 embossed plastic tape (500 parts per full reel). B = Less than full reel. In tape, but not machine ready. To have a leader and trailer added ($25 charge), use code letter D instead. 2. Inductance measured at 100 kHz, 0.1 V, 0 Adc on an Agilent/ HP 4192 or equivalent. 3. DCR measured on a micro-ohmmeter. 4. DC imbalance is the maximum difference in current measured at pins 1 and 3 with the source at pin 2. Inductance drop is 15% at maximum imbalance. 5. Operating temperature range -40C to +85C. 6. Electrical specifications at 25C. Specifications subject to change without notice. (c) Coilcraft, Inc. 2006 Pins 1 - 3 DC L min2 DCR max3 imbalance4 (H) (mOhm) max (mA) 27 75 -- 25 100 -- 108 330 -- 84 150 -- 75 150 -- 75 130 -- 100 200 -- 225 250 -- 896 330 -- 900 180 -- 25 100 30 70 150 18 75 150 29 140 200 13 270 200 4.0 100 160 15 172 160 5.0 240 500 13 144 270 17 221 200 10 896 330 25 70 150 19 90 180 19 175 200 11 135 160 13 384 220 3.5 400 300 7.5 625 350 6.0 Document 425-1 Revised 11/03/05 Document 425-2 Wideband Transformers Dimensions - surface mount parts 0.325 max 8,26 Dimensions - through hole parts 0.325 max 8,26 0.285 max 7,24 Dot indicates pin 1 Dot indicates pin 1 0.225 max 5,72 0.225 max 5,72 0.100 typ 2,54 0.285 max 7,24 0.004 /0,10 0.400 typ 10,16 0.025max 0,64 0.100 typ 2,54 0.520 0.010 13,21 0,25 0.06 1,52 0.40 10,2 1 3 0.03 0,76 90 -105 0.010 x 0.020 typ 0,25 x 0,51 0.300 0.010 7,62 0,25 0.520 13,2 0.10 2,5 0.10 2,5 2 0.120 min 3,05 0.30 7,6 0.100 2,54 0.100 2,54 6 5 2 5 3 4 0.025 dia typ 0,64 Recommended Board Layout Terminations: Tin over nickel over copper Packaged 54 per tube. Specifications subject to change without notice. (c) Coilcraft, Inc. 2006 6 4 Recommended Land Pattern Terminations: Tin over nickel over copper Tape and reel: 500/13 reel 24 mm tape width For packaging data see Tape and Reel Specifications section. 1 Document 425-2 Revised 12/29/05 Document 425-3 0 Attenuation (dB) Attenuation (dB) Transformers with no center taps 1 2 3 WB1-1 3 dB bandwidth: 0.150 - 500 MHz 4 5 0.01 0.1 1 10 100 0 1 2 3 WB2.5-6 3 dB bandwidth: 0.080 - 225 MHz 4 5 1000 0.01 0.1 0 1 2 3 WB1-6 3 dB bandwidth: 0.100 - 350 MHz 4 5 0.01 0.1 1 10 100 2 3 WB4-6 3 dB bandwidth: 0.100 - 125 MHz 4 5 0.01 Attenuation (dB) Attenuation (dB) 2 WB1.18-3 3 dB bandwidth: 0.040 - 300 MHz 5 0.1 1 10 0.1 100 WB1.5-6 3 dB bandwidth: 0.050 - 325 MHz 5 1 10 3 WB9-1 3 dB bandwidth: 0.125 - 125 MHz 4 5 0.1 100 WB2-1-2W 3 dB bandwidth: 0.080 - 700 MHz 5 1 10 Frequency (MHz) WB16-1 3 dB bandwidth: 0.150 - 100 MHz 4 5 0.1 1 10 100 1000 100 1000 100 1000 0 1 2 3 WB36-1 3 dB bandwidth: 0.100 - 45 MHz 4 5 0.01 0.1 1 10 Frequency (MHz) Specifications subject to change without notice. (c) Coilcraft, Inc. 2006 1000 2 3 0.01 Attenuation (dB) Attenuation (dB) 2 0.1 100 Frequency (MHz) 0 0.01 10 0 1000 1 4 1 1 Frequency (MHz) 3 1000 2 0.01 Attenuation (dB) Attenuation (dB) 2 0.1 100 Frequency (MHz) 0 0.01 10 0 1000 1 4 1 1 Frequency (MHz) 3 1000 Frequency (MHz) 0 0.01 100 0 1000 1 3 10 1 Frequency (MHz) 4 1 Frequency (MHz) Attenuation (dB) Attenuation (dB) Frequency (MHz) Document 425-3 Revised 11/03/05 Document 425-4 0 Attenuation (dB) Attenuation (dB) Transformers with secondary center tap 1 2 3 WB1-1T 3 dB bandwidth: 0.100 - 375 MHz 4 5 0.01 0.1 1 10 100 0 1 2 3 WB4-6T 3 dB bandwidth: 0.050 - 200 MHz 4 5 1000 0.01 0.1 0 1 2 3 WB1-6T 3 dB bandwidth: 0.050 - 200 MHz 4 5 0.01 0.1 1 10 100 2 3 WB5-1T 3 dB bandwidth: 0.050 - 400 MHz 4 5 0.01 Attenuation (dB) Attenuation (dB) 2 WB2-1T 3 dB bandwidth: 0.070 - 400 MHz 5 0.1 1 10 0.1 100 WB2.5-6T 3 dB bandwidth: 0.050 - 125 MHz 5 1 10 3 WB8-1T 3 dB bandwidth: 0.150 - 400 MHz 4 5 0.1 100 WB3-1T 3 dB bandwidth: 0.040 - 500 MHz 5 1 10 100 1000 Frequency (MHz) Attenuation (dB) 1000 2 3 WB13-1T 3 dB bandwidth: 0.150 - 125 MHz 4 5 0.01 Attenuation (dB) Attenuation (dB) 2 0.1 100 0.1 1 10 100 1000 Frequency (MHz) 0 0.01 10 0 1000 1 4 1 1 Frequency (MHz) 3 1000 2 0.01 Attenuation (dB) Attenuation (dB) 2 0.1 100 Frequency (MHz) 0 0.01 10 0 1000 1 4 1 1 Frequency (MHz) 3 1000 Frequency (MHz) 0 0.01 100 0 1000 1 3 10 1 Frequency (MHz) 4 1 Frequency (MHz) Attenuation (dB) Attenuation (dB) Frequency (MHz) 0 1 2 3 WB16-6T 3 dB bandwidth: 0.050 - 100 MHz 4 5 0.01 0.1 1 10 100 1000 Frequency (MHz) 0 1 2 3 WB4-1H 3 dB bandwidth: 0.100 - 500 MHz 4 5 0.01 0.1 1 10 100 1000 Frequency (MHz) Specifications subject to change without notice. (c) Coilcraft, Inc. 2006 Document 425-4 Revised 11/03/05 Document 425-5 0 Attenuation (dB) Attenuation (dB) Transformers with primary and secondary center taps 1 2 3 WBT1-6 3 dB bandwidth: 0.040 - 200 MHz 4 5 0.01 0.1 1 10 100 0 1 2 3 WBT4-1A 3 dB bandwidth: 0.040 - 350 MHz 4 5 1000 0.01 0.1 0 1 2 3 WBT1.5-1 3 dB bandwidth: 0.040 - 350 MHz 4 5 0.01 0.1 1 10 100 2 3 WBT16-1 3 dB bandwidth: 0.100 - 100 MHz 4 5 0.01 Attenuation (dB) Attenuation (dB) 2 WBT2.5-6 3 dB bandwidth: 0.050 - 100 MHz 5 0.1 1 10 100 1000 Frequency (MHz) Attenuation (dB) 1000 0.1 1 10 100 1000 100 1000 Frequency (MHz) 0 0.01 100 0 1000 1 3 10 1 Frequency (MHz) 4 1 Frequency (MHz) Attenuation (dB) Attenuation (dB) Frequency (MHz) 0 1 2 3 WBT25-1 3 dB bandwidth: 0.100 - 65 MHz 4 5 0.01 0.1 1 10 Frequency (MHz) 0 1 2 3 WBT4-1 3 dB bandwidth: 0.050 - 150 MHz 4 5 0.01 0.1 1 10 100 1000 Frequency (MHz) Specifications subject to change without notice. (c) Coilcraft, Inc. 2006 Document 425-5 Revised 11/03/05