Surface Mount Wideband RF Transformers
Document 117-1
Document 117-1 Revised 03/23/06
• ProvideswidebandpassperformanceinasmallSMTpackage.
• 1812sizeferritebodywithaceramicbase.
• 50Visolation,1/4WattRFinputpower
1:1 Transformers
Part Inductance2 Test frequency Imp. ratio DCR max IDC Isolation Insertion Bandwidth Color
number1 (µH) (MHz) pri : sec (Ohms) (mA) (Vrms) loss (dB) (MHz) dot
1812WBT-1L_ 14 10 1 : 1 4.8 200 50 <1 0.340
–
22 Yellow
1812WBT-2L_ 5.3 10 1 : 1 1.8 400 50 <1 0.800
–
60 Green
1812WBT-3L_ 1.25 50 1 : 1 0.7 500 50 <1 4
–
200 White
1812WBT-4L_ 0.220 50 1 : 1 0.3 700 50 <1 11
–
480 Orange
1812WBT-5L_ 0.090 50 1 : 1 0.15 700 50 <1.5 48
–
645 Red
1.5:1 Transformers
Part Inductance (µH)2 Test freq. Imp. ratio DCR max () IDC Isolation Insertion Bandwidth Color
number1 pri sec (MHz) pri : sec pri sec (mA) (Vrms) loss (dB) (MHz) dot
1812WBT1.5-1L_ 5.0 3.3 10 1.5 : 1 1.05 0.87 400 50 0.5 1.3
–
100 Red
1812WBT1.5-2L_ 2.5 1.6 10 1.5 : 1 0.74 0.58 500 50 0.5 2.75
–
135 Orange
1812WBT1.5-3L_ 1.0 0.60 10 1.5 : 1 0.43 0.34 500 50 0.75 7.2
–
200 Yellow
1812WBT1.5-4L_ 0.144 0.090 10 1.5 : 1 0.18 0.14 700 50 2.25 38
–
535 Green
2:1 Transformers
Part Inductance (µH)2 Test freq. Imp. ratio DCR max () IDC Isolation Insertion Bandwidth Color
number1 pri sec (MHz) pri : sec pri sec (mA) (Vrms) loss (dB) (MHz) dot
1812WBT2-1L_ 13.80 6.90 10 2 : 1 4.6 3.2 200 50 <1.5 0.800
–
23 Brown
1812WBT2-2L_ 5.850 2.925 10 2 : 1 1.25 0.95 400 50 <1.5 2.2
–
65 Red
1812WBT2-3L_ 2.60 1.30 10 2 : 1 0.52 0.42 600 50 <1.5 4
–
105 Orange
1812WBT2-4L_ 0.910 0.455 50 2 : 1 0.27 0.23 700 50 <1.5 11
–
200 Yellow
1. Whenordering,pleasespecifytermination andpackaging codes:
1812WBT1.5-4LC
Termination: L =RoHScompliantgoldovernickelovermoly-manganese
Specialorder: T =RoHStin-silver-copper(95.5/4/0.5)orS =non-RoHStin-lead(63/37).
Packaging: C = 7″ machine-readyreel. EIA-481embossedplastictape(600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Cinstead.
D = 13″ machine-readyreel. EIA-481embossedplastictape.Factoryorderonly,notstocked(2200partsperfullreel).
2. Inductanceisperwinding
3. Electricalspecicationsat25°C.Measurementsarereferencedto50Ohms.
RefertoDoc362“SolderingSurfaceMountComponents”beforesoldering.
Core material Ferrite
Environmental RoHScompliantwithoutexemption,halogenfree
Terminations RoHScompliantgoldovernickelovermoly-manganese.
Otherterminationsavailableatadditionalcost.
Weight 131–152mg
Ambient temperature –40°Cto+85°CwithIrmscurrent
Storage temperature Component:–40°Cto+85°C.
Tapeandreelpackaging:–40°Cto+80°C
Resistance to soldering heat Maxthree40secondreowsat
+260°C,partscooledtoroomtemperaturebetweencycles
Moisture Sensitivity Level (MSL) 1(unlimitedoorlifeat<30°C/
85%relativehumidity)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
Oneperbillionhours/onebillionhours,calculatedperTelcordiaSR-332
Packaging 600/7″reel;2200/13″reel Plastictape: 12mmwide,
0.3mmthick,8mmpocketspacing,3.7mmpocketdepth
PCB washing Onlypurewateroralcoholrecommended
Document 117-2
Document117-2 Revised01/26/05
Typical Frequency Attenuation
1:1 Transformers
Typical Frequency Attenuation
1.5:1 Transformers
Typical Frequency Attenuation
2:1 Transformers
4
3
1
2
Top View
0.070
1,78
0.100 ±0.003
2,54 ±0,008
0.178 ±0.003
4,52 ±0,08
0.150
3,81 max
ref
Color dot
over
primary
0.135
3,43 max
0.195
4,95 max
1
23
4
Pri Sec
0.048
1,22
0.015
0,38
0.115
2,92
0.018
0,46
0.020
0,51
0.057
1,45
Recommended
Land Pattern
0.015
0,38 ref
0.040
1,02
0.020
0,51
min
0.030 ±0.002
0,76 ±0,05
Pad
Detail
Attenuation (dB, Re: 50 Ohms)
Frequency (MHz)
0
1
2
3
4
5
6
7
8
0.1 110 100 1000
-1 -2 -4
-3 -5
Attenuation (dB, Re: 50 Ohms)
0
1
2
3
4
5
6
7
8
Frequency (MHz)
0.1 110 100 1000
-1 -2 -4
-3
Attenuation (dB, Re: 50 Ohms)
0
1
2
3
4
5
6
7
8
Frequency (MHz)
0.1 110 100 1000
-1 -2 -4
-3
Measuredonanetworkanalyzer(re:50Ohms)