Surface Mount RF Transformer 50Ω ADT2-71T+ 0.005 to 70 MHz The Big Deal • Low insertion loss, 0.9 dB • Low unbalance, 0.5 dB, 3˚ • Small size, 0.27 x 0.31 x 0.22” CASE STYLE: CD637 Product Overview Mini-Circuits’ ADT2-71T+ is a 50Ω DC isolated surface-mount transformer with a secondary/primary impedance ratio of 2:1 and a center tap on the secondary winding. This model covers the 0.005 to 70 MHz band with low insertion loss (0.9 dB) as well as low phase unbalance (3˚) and amplitude unbalance (0.5 dB). The unit comes enclosed in a miniature, 6-lead plastic package measuring just 0.27 x 0.31 x 0.22”, ideal for dense circuit board layouts. Key Features Feature Advantages DC isolation Provides DC isolation between circuits and efficient AC transmission, eliminating the need for external DC biasing components. Secondary center tap Allows DC feed up to 30 mA and DC bias without adding bias tees into the signal chain. Low insertion loss, 0.9 dB Excellent transmission of signal power from input to output. Low phase and amplitude unbalance, 3˚, 0.5 dB Low phase and amplitude unbalance can improve a system’s electromagnetic compatibility by rejecting unwanted common-mode noise. Small footprint, 0.27 x 0.31 x 0.22” Accommodates tight space requirements for dense PCB layouts. Notes A. Performance and quality attributes and conditions not expressly stated in this specification document are intended to be excluded and do not form a part of this specification document. B. Electrical specifications and performance data contained in this specification document are based on Mini-Circuit’s applicable established test performance criteria and measurement instructions. C. The parts covered by this specification document are subject to Mini-Circuits standard limited warranty and terms and conditions (collectively, “Standard Terms”); Purchasers of this part are entitled to the rights and benefits contained therein. For a full statement of the Standard Terms and the exclusive rights and remedies thereunder, please visit Mini-Circuits’ website at www.minicircuits.com/MCLStore/terms.jsp Mini-Circuits ® www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 [email protected] Page 1 of 2 Surface Mount RF Transformer 50Ω ADT2-71T+ 0.005 to 70 MHz Maximum Ratings Operating Temperature Features -20°C to 85°C Storage Temperature -55°C to 100°C RF Power 0.25W DC Current 30mA Permanent damage may occur if any of these limits are exceeded. Pin Connections PRIMARY DOT PRIMARY SECONDARY DOT SECONDARY SECONARY CT NOT USED 3 1 4 6 5 2 • wideband, 0.005 to 70 MHz • excellent amplitude unbalance, 0.2 dB typ. and phase unbalance, 2 deg. typ. in 1 dB bandwidth • aqueous washable • plastic base with leads CASE STYLE: CD637 +RoHS Compliant The +Suffix identifies RoHS Compliance. See our web site for RoHS Compliance methodologies and qualifications Applications • impedance matching • balanced to unbalanced transformation • push-pull amplifiers Electrical Specifications @25°C Outline Drawing Parameter Frequency (MHz) Min. Typ. 0.005 — — — — — — Impedance Ratio (secondary/primary) Max. Unit — 70 MHz 0.4 0.9 0.2 0.5 1.0 3.0 1.3 1.8 0.5 1.0 5.0 8.0 2 Frequency Range 0.01 - 50 0.005 - 70 0.01 - 50 0.005 - 70 0.01 - 50 0.005 - 70 Insertion Loss Amplitude Unbalance Phase Unbalance dB dB Degree PCB Land Pattern Typical Performance Data FREQUENCY (MHz) INSERTION LOSS (dB) INPUT R. LOSS (dB) 0.005 0.010 0.050 0.100 0.500 2.000 10.000 30.000 50.000 70.000 1.00 0.39 0.07 0.05 0.04 0.05 0.18 0.33 0.46 0.96 9.12 13.90 26.83 32.43 39.29 33.89 24.23 17.30 12.93 10.08 Suggested Layout, Tolerance to be within ± � .002 Outline Dimensions ( inch mm ) A .272 6.91 B .310 7.87 C .220 5.59 D .100 2.54 H .030 0.76 J .026 0.66 K .065 1.65 L .300 7.62 E .206 5.23 F .055 1.40 G .100 2.54 wt grams 0.40 AMPLITUDE UNBALANCE (dB) PHASE UNBALANCE (Deg.) 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.09 0.25 0.54 0.03 0.02 0.02 0.03 0.03 0.06 0.24 0.73 1.55 2.82 Demo Board MCL P/N: TB-430 ADT2-71T+ INPUT RETURN LOSS 1.0 50 0.8 40 RETURN LOSS (dB) Config. A INSERTION LOSS (dB) ADT2-71T+ INSERTION LOSS 0.6 0.4 0.2 0.0 0 14 28 42 56 70 FREQUENCY (MHz) 30 20 10 0 0 14 28 42 56 FREQUENCY (MHz) Notes A. Performance and quality attributes and conditions not expressly stated in this specification document are intended to be excluded and do not form a part of this specification document. B. Electrical specifications and performance data contained in this specification document are based on Mini-Circuit’s applicable established test performance criteria and measurement instructions. C. The parts covered by this specification document are subject to Mini-Circuits standard limited warranty and terms and conditions (collectively, “Standard Terms”); Purchasers of this part are entitled to the rights and benefits contained therein. For a full statement of the Standard Terms and the exclusive rights and remedies thereunder, please visit Mini-Circuits’ website at www.minicircuits.com/MCLStore/terms.jsp Mini-Circuits ® www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 [email protected] REV. OR M156261 ADT2-71T+ ED-12619/4 IG/CP/AM 160503 Page 2 of 2 70