Surface Mount RF Transformer 75Ω ADT3-1T-75+ 1 to 500 MHz The Big Deal • • • • Low insertion loss, 1.2 dB Excellent return loss, 25 dB in 1 dB bandwidth Low unbalance, 0.2 dB, 1˚ Small size, 0.27 x 0.31 x 0.22” CASE STYLE: CD542 Product Overview Mini-Circuits’ ADT3-1T-75+ is a 75Ω DC isolated surface-mount transformer with a secondary/primary impedance ratio of 3:1 and a center tap on the secondary winding. This model covers the 1 to 500 MHz band with low insertion loss (1.2 dB), excellent return loss (25 dB within the 1 dB bandwidth, low phase unbalance (1˚) and low amplitude unbalance (0.2 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, 1.2 dB Excellent transmission of signal power from input to output. Excellent return loss, 25 dB within 1 dB bandwidth. Provides excellent matching for 75Ω systems with low signal reflection. Low phase and amplitude unbalance, 1˚, 0.2 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 3 Surface Mount RF Transformer 75Ω ADT3-1T-75+ 1 to 500 MHz Features • excellent return loss, 25 dB typ. in 1 dB bandwidth • excellent amplitude unbalance, 0.2 dB typ. and phase unbalance, 1 deg. typ. in 1dB bandwidth • aqueous washable • protected under US patent 6,133,525 CASE STYLE: CD542 +RoHS Compliant The +Suffix identifies RoHS Compliance. See our web site for RoHS Compliance methodologies and qualifications Applications • balun • impedance matching • DOCSIS 3.1 Reel Size 7” 13” and Reel Available Tape cost at no extra Devices/Reel 20, 50, 100, 200 500,1000 Electrical Specifications at 25°C Parameter Frequency (MHz) Min. Typ. Impedance Ratio (secondary/ primary) Max. Unit 3 Frequency Range Insertion Loss* Amplitude Unbalance Phase Unbalance Return Loss Ohm 1 — 500 2-300 — — 0.8 1-500 — — 1.2 1-300 — 0.2 0.6 300-500 — 0.4 1.20 1-300 — 1 4 300-500 — 4 8 1-2 2-300 300-500 13 17 14 19 25 22 — — — MHz dB dB Degree dB * Insertion Loss is referenced to mid-band loss, 0.5 dB typ. Pin Connections Maximum Ratings Parameter Function Ratings Pin Number Operating Temperature -40°C to 85°C PRIMARY DOT 3 Storage Temperature -55°C to 100°C PRIMARY 1 RF Power 0.25W SECONDARY DOT 6 DC Current 30mA SECONDARY 4 SECONDARY CT 5 NOT USED 2 Permanent damage may occur if any of these limits are exceeded. Config. A 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 M154705 ADT3-1T-75+ IG/CP/AM 160121 Page 2 of 3 ADT3-1T-75+ Outline Drawing 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 .112 2.84 F .055 1.40 G .100 2.54 wt grams 0.20 PCB Land Pattern Suggested Layout, Tolerance to be within ± � .002 Typical Performance Data FREQUENCY (MHz) INSERTION LOSS (dB) INPUT R. LOSS (dB) 1.02 0.79 0.57 0.58 0.64 0.64 0.66 0.67 0.73 0.81 18.88 23.05 30.52 32.09 31.42 31.03 30.66 29.74 28.00 25.24 1.0 2.0 10.0 50.0 150.0 200.0 250.0 300.0 400.0 500.0 AMPLITUDE UNBALANCE (dB) 0.03 0.02 0.01 0.04 0.06 0.12 0.22 0.28 0.48 0.72 ADT3-1T-75+ INSERTION LOSS RETURN LOSS (dB) INSERTION LOSS (dB) 50 1.2 0.8 0.4 0 100 200 300 400 40 30 20 10 500 0 100 ADT3-1T-75+ AMPLITUDE UNBALANCE 300 400 500 ADT3-1T-75+ PHASE UNBALANCE 1.0 3 PHASE UNBALANCE (deg.) AMPLITUDE UNBALANCE (dB) 200 FREQUENCY (MHz) FREQUENCY (MHz) 0.8 0.5 0.3 0.0 0.26 0.18 0.22 0.16 0.04 0.13 0.27 0.61 0.82 2.00 ADT3-1T-75+ INPUT RETURN LOSS 1.6 0.0 PHASE UNBALANCE (Deg.) 0 100 200 300 400 500 2 1 0 0 100 200 300 400 500 FREQUENCY (MHz) FREQUENCY (MHz) Additional 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 Notes entitled to the rights and benefits therein. For a full stated statement the Standard Termsare and the exclusive rights and remedies visit Mini-Circuits’ website at A. Performance and quality attributescontained and conditions not expressly in thisof specification document intended to be excluded and do not formthereunder, a part of thisplease 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. www.minicircuits.com/MCLStore/terms.jsp 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 3 of 3