X2AS

Model X2AS SMT Crossover Description Rev. A The X2AS is a low profile crossover to intersect an RF and DC circuit trace in an easy to use surface mount package designed for frequencies up to 6 GHz. The X2AS is ideal for any application where an RF circuit must intersect with a DC circuit without resorting to a multilayer PCB. Parts have been subjected to rigorous qualification testing and units are 100% tested. They are manufactured using materials with x and y thermal expansion coefficients compatible with common substrates such as FR4, G-10, and polyimide. Features: • • • • • • • • • ELECTRICAL SPECIFICATIONS** Frequency GHz Port Impedance Ohms Return Loss dB Min DC – 6.0 GHz RF – DC Crossover Low Loss DC Isolation Surface Mountable Tape And Reel Convenient Package Lead Free 100 % Tested DC – 2.5 2.5 – 4.0 4.0 – 6.0 Insertion Loss dB Max 50 50 50 Power Watts 20 20 15 ΘJC ºC / Watt Operating Temp. ºC 0.05 0.10 0.15 30 15 10 250.9 250.9 250.9 -55 to +85 -55 to +85 -55 to +85 Outline Drawing **Specification based on performance of unit properly installed on microstrip printed circuit boards with 50 Ω nominal impedance. Specifications subject to change without notice. Top View (Near-side) .200±.010 [5.08±0.25] GND RF IN / OUT GND .047±.005 [1.19±0.13] Side View Bottom View (Far-side) 2X .026±.004 [0.65±0.10] GND 2X .056±.004 [1.42±0.10] RF IN / OUT GND GND 4X .033±.008 SQ [0.83±0.20] GND .200±.010 [5.08±0.25] RF IN / OUT RF IN / OUT .039±.004 [1.00±0.10] Dimensions are in Inches [Millimeters] X2AS Mechanical Outline Available on Tape and Reel For Pick and Place Manufacturing. USA/Canada: Toll Free: Europe: (315) 432-8909 (800) 544-2414 +44 2392-232392 Model X2AS Rev. A Typical Performance: 0.5 GHz to 6.0 GHz Return Loss X2AS -10 0.00 Insertion Loss X2AS -20 -0.10 -30 Insertion Loss (dB) 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 Return Loss (dB) -0.20 -40 -0.30 -50 -0.40 -60 500 -0.50 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 Frequency (MHz) Frequency (MHz) Mounting In order for Xinger crossovers to work optimally, there must be 50 transmission lines leading to and from all of the RF ports. Also, there must be a very good ground to the corners of the crossover to insure proper electrical performance. If either of these two conditions are not satisfied, insertion loss, VSWR and isolation parameters may not meet published specifications. When a surface mount crossover is mounted to a printed circuit board, the primary concerns are; insuring the RF pads of the device are in contact with the circuit trace of the PCB and insuring the ground plane of neither the component nor the PCB is in contact with the RF signal. Since the component is not symmetrical, the crossovers are specifically oriented in the tape and reel. An example of how the PCB footprint could look is shown below. In specific designs, the 50 lines need to be adjusted to the unique dielectric coefficients and thicknesses as well as varying pick and place equipment tolerances. Mounting Footprint To ensure proper electrical and thermal performance there must be a ground plane with 100% solder connection underneath the part .063 SQ TYP [1.60] .148 [3.75] Mutiple plated thru holes to ground 50 Transmission Line .034 TYP [0.86] DC Line Dimensions are in Inches [Millimeters] X2AS Mounting Footprint USA/Canada: Toll Free: Europe: (315) 432-8909 (800) 544-2414 +44 2392-232392 Available on Tape and Reel For Pick and Place Manufacturing.