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Model 0922B75-37A
Rev. A
Xinger Balun 75 to 75 Balanced
Description
The 0922B75-37A is a low cost, low profile sub-miniature unbalanced to balanced transformer designed for differential inputs and output locations on wireless chipsets in an easy to use surface mount package covering dual polarized commercial Satellite bands 950 MHz - 2150 MHz. The 0922B75-37A is ideal for high volume manufacturing and is higher performance than traditional wire wound baluns. The 0922B75-37A has an unbalanced port impedance of 75 and a 75 balanced port impedance*. This transformation enables single ended signals to be applied to differential ports on modern integrated chipsets. The output ports have equal amplitude (-3dB) with 180 degree phase differential. The 0922B75-37A is available on tape and reel for pick and place high volume manufacturing.
ELECTRICAL SPECIFICATIONS**
* * * * * * *
Features:
950 - 2150 MHz 180 Transformer 75 Ohm to 2 x 37.5 Ohm Low Insertion Loss Multi-band Cellular Apps Sat LNB Chipset Compliant No DC Decoupling Capacitors Required * Input to Output DC Isolation * Surface Mountable * Tape & Reel
Frequency
MHz
Unbalanced Port Impedance
Ohms
Balanced Port Impedance*
Ohms
Return Loss
dB min
Insertion Loss
dB max
950 - 2150 Amplitude Balance
dB
75 Phase Balance
Degrees max
75 Power Handling
Watts
12 JC
C / Watt
0.8*** Operating Temp.
C
0 0.7
180 10
4
TBD
-55 to +85
**Specification based on performance of unit properly installed on microstrip printed circuit boards with 75 + 37.5 nominal impedance. Spec's subject to change without notice. * 37.5 reference to ground *** Insertion Loss stated at room temperature (0.9 dB Max at +85 C)
Outline Drawing
Top View (Near-side) .150.005 [3.810.13] 2 Orientation Marker Denotes Pin Location Side View .059.006 [1.510.15] Bottom View (Far-side)
3
1
4X .020.004 [0.510.10]
.150.005 [3.810.13]
.125.004 [3.180.10]
6X .009.004 [0.240.10]
4
5
6
Dimensions are in Inches [Millimeters] Mechanical Outline
Pin 1 2 3 4 5 6
Designation In NC / DC GND Out 1 GND Out 2
6X .030.004 [0.760.10]
Tolerances are Non-Cumulative
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 0922B75-37A
Rev. A
Typical Broadband Performance: 550 MHz. to 2550 MHz.
Balanced and UnBalanced Return Loss
0
Amplitude Balance
1 0.8 Amplitude Balance [dB] 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1 550 750 950 1150 1350 1550 1750 1950 2150 2350 2550 Frequency [MHz]
-5 Return Loss [dB] -10 -15 -20 -25 -30 550 750 950 1150 1350 1550 1750 1950 2150 2350 2550 Frequency [MHz]
Insertion Loss
0 -0.2 Insertion Loss [dB] -0.4 -0.6 -0.8 -1 -1.2 -1.4 -1.6 -1.8 -2 550 750 950 1150 1350 1550 1750 1950 2150 2350 2550 Frequency [MHz] Phase Balance [Deg] 190 187.5 185 182.5 180 177.5 175 172.5
Phase Balance
170 550 750 950 1150 1350 1550 1750 1950 2150 2350 2550 Frequency [MHz]
Pin Configuration:
The internal configuration of the Xinger balun is diagramed to the left; the unbalanced port is DC connected to ground and the two balanced ports are DC connected and floating. For many chipset applications there is an opportunity to eliminate two decoupling capacitors and/or use a single bias point if applicable. Differential drive is popular in integrated circuit since it aids stability in the presence of bond wire and pin inductance, provides some degree of immunity to power supply and ground noise, and can provide higher output power in the case of some device limits. The construction of the Xinger balun is bonded multi-layered stripline made of low loss dielectric material with plated through vias connecting the internal circuitry to the external printed circuit board, similar to that of the Xinger hybrids and directional couplers.
USA/Canada: Toll Free: Europe:
(315) 432-8909 (800) 544-2414 +44 2392-232392
Available on Tape and Reel For Pick and Place Manufacturing.
Model 0922B75-37A
Rev. A
Mounting Configuration:
6X .030 [0.76] 75 Transmission Line
6X .016 [0.41]
Plated thru holes to ground
.125 [3.17]
In order for Xinger surface mount components to work optimally, there must be a 75 transmission line to the balanced port and 37.5 transmission lines from the unbalanced ports. If this condition is not satisfied, amplitude balance, insertion loss and VSWR may not meet published specifications. All of the Xinger components are constructed from ceramic filled PTFE composites which possess excellent electrical and mechanical stability having X and Y thermal coefficient o of expansion (CTE) of 17 ppm/ C An example of the PCB footprint used in the testing of these parts is shown to the left. In specific designs, the transmission line widths need to be adjusted to the unique dielectric coefficients and thicknesses as well as varying pick and place equipment tolerances.
No copper area 2X 37.5 Transmission Line
4X .020 [0.51]
Circuit Pattern Footprint Pad (s) Solder Resist Dimensions are in Inches [Millimeters] Mounting Footprint
Packaging and Ordering Information
Parts are available in reel and are packaged per EIA 481-2. Parts are oriented in tape and reel as shown below. Minimum order quantities are 4000 per reel. See Model Numbers below for further ordering information.
Dimensions are in inches [mm]
Direction of Part Feed (Unloading)
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 0922B75-37A
Rev. A
OA
OC
OD
QUANTITY/REEL 4000
TABLE 1 REEL DIMENSIONS (inches [mm]) OA 13.0 [330.2] B 0.472 [12.0] OC 4.017 [102.03] OD 0.512 [13.0]
B
USA/Canada: Toll Free: Europe:
(315) 432-8909 (800) 544-2414 +44 2392-232392
Available on Tape and Reel For Pick and Place Manufacturing.

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