Available on Tape
and Reel for Pick and
Place Manufacturing.
USA/Canada:
Toll Free:
Europe:
(315) 432-8909
(800) 411-6596
+44 2392-232392
Model X2AS
Rev D
SMT Crossover
Description
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, RF-35, RO4003 and polyimide. Produced with 6 of 6 RoHS compliant
tin immersion finish.
Electrical Specifications **
Features:
• DC – 6.0 GHz
• RF – DC Crossover
• Low Loss
• DC Isolation
• Surface Mountable
• Tape And Reel
• Convenient Package
• Lead Free
• 100 % Tested
Frequency
Port Impedance
Return Loss
GHz Ohms dB Min
DC – 2.5
50
20
2.5 – 3.5
50
17
3.5 – 6.0
50
15
Insertion Loss Power Operating
Temp.
dB Max
Avg. CW Watts
@ 85 ºC
ºC
0.05
30
-55 to +140
0.10
15
-55 to +140
0.15
10
-55 to +140
**Specification based on performance of unit properly installed on microstrip printed circuit boards
with 50 Ω nominal impedance. Specifications subject to change without notice.
Mechanical Outline
Dimensions are in Inches [Millimeters]
X2AS Mechanical Outline
USA/Canada:
Toll Free:
Europe:
(315) 432-8909
(800) 411-6596
+44 2392-232392
Available on Tape and
Reel for Pick and Place
Manufacturing.
Model X2AS
Rev D
Insertion Loss and Power Derating Curves
Typical Insertion Loss Derating Curve for X2AS
-0.2
-0.18
-0.16
-0.14
-0.12
-0.1
-0.08
-0.06
-0.04
-0.02
0
-100 -50 050 100 150 200
Temperature of the Part (
o
C)
Insertion Loss (dB)
typical insertion loss (f=2.5Ghz)
typical insertion loss (f=3.5Ghz)
typical insertion loss (f=6Ghz)
Insertion Loss Derating:
The insertion loss, at a given frequency, of a group of
couplers is measured at 25°C and then averaged. The
measurements are performed under small signal
conditions (i.e. using a Vector Network Analyzer). The
process is repeated at 85°C and 150°C. A best-fit line
for the measured data is computed and then plotted
from -55°C to 150°C.
Power Derating:
The power handling and corresponding power derating
plots are a function of the thermal resistance, mounting
surface temperature (base plate temperature),
maximum continuous operating temperature of the
coupler, and the thermal insertion loss. The thermal
insertion loss is defined in the Power Handling section of
the data sheet.
As the mounting interface temperature approaches the
maximum continuous operating temperature, the power
handling decreases to zero.
If mounting temperature is greater than 85°C, Xinger
crossover will perform reliably as long as the input
power is derated to the curve above.
Available on Tape
and Reel for Pick and
Place Manufacturing.
USA/Canada:
Toll Free:
Europe:
(315) 432-8909
(800) 411-6596
+44 2392-232392
Model X2AS
Rev D
Typical Performance: 0.5 GHz to 6.0 GHz
500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000
-60
-50
-40
-30
-20
-10
Return Loss X2AS
Freq (MHz)
Return Loss (dB)
-55C
25C
85C
100
150C
500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000
-0.5
-0.4
-0.3
-0.2
-0.1
0
Insertion Loss X2AS
Freq (MHz)
Insertion Loss (dB)
-55C
25C
85C
100
150C
Mounting Mounting Footprint
In order for Xinger crossovers to work optimally, there
must be 50Ω 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 50Ω lines need to be adjusted to the
unique dielectric coefficients and thicknesses as well as
varying pick and place equipment tolerances.
X2AS Rev A Mounting Footprint
Dimensions are in Inches [Millimeters]
To ensure proper electrical and thermal performance
there must be a ground plane with 100%
solder connection underneath the part
