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B0008K7575A00
Rev B
Ultra Low Profile 0606 Balun 75 to 75 Balanced
Description
The B0008K7575A00 is a low profile sub-miniature balanced to unbalanced transformer designed for differential inputs and output locations on next generation broadcast applications including tuner chipsets in an easy to use surface mount package. The B0008K7575A00 is ideal for high volume manufacturing and is higher performance than traditional wire wound baluns. The B0008K7575A00 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 semiconductors. The output ports have equal amplitude (-3dB) with 180 degree phase differential.
Detailed Electrical Specifications: Specifications subject to change without notice.
ROOM (25C)
Features:
* * * * * * * * * 48 - 870 MHz DVB-C & DVB-T Halogen Free 0.38 mm Height Profile 75 Ohm to 2 x 37.5 Ohm Broadcast Bands Low Insertion Loss Surface Mountable RoHS Compliant
Parameter Frequency Unbalanced Port Impedance Balanced Port Impedance Return Loss , Insertion Loss* ** Amplitude Balance*** Phase Balance*** CMRR Power Handling Operating Temperature
Min. 48
Typ. 75 75 14 0.7 5.7 50 5
Max 870
Unit MHz
12
0.9 7.5 52 1.0 +85
-55
dB dB dB Degrees dB Watts C
* Insertion Loss stated at room temperature (Insertion Loss is approximately 0.15 dB higher at +85 C). All performances stated for recommended operation with external circuitry. **Note that Insertion Loss is calculated as the sum of powers, i.e.10 log[ (S12)2 + (S13)2 ] *** Phase and amplitude balance can be improved significantly by using an external inductor as described on pages 2 - 5. Outline Drawing
Top View (Near-side) .062 [1.57]
Side View
Bottom View (Far-side)
.015 [0.38] 2 1 .062 [1.57] 3 4
.015 [0.39] 1 2 .043 [1.10] 4 3 .012 [0.30]
.015 [0.39] .012 [0.30]
Pin Designation 1 GND
Dimensions are in Inches [Millimeters] Mechanical Outline
2 Unbalanced Port 3 Balanced Port 4 Balanced Port
Tolerances are Non-Cumulative
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 B0008K7575A00
Rev B
Typical Performance (test/specification condition, basic configuration)
B0008K7575A00 Gnd Pin #1 Balanced Pin #4
Rs R=75 O
Rd R=75 O
Unbalanced Pin #2
Balanced Pin #3
Figure 1 The 1:1 Guanella balun in it's nominal/test configuration (basic configuration).
USA/Canada: Toll Free: Europe:
(315) 432-8909 (800) 411-6596 +44 2392-232392
Available on Tape and Reel for Pick and Place Manufacturing.
B0008K7575A00
Rev B
Typical Performance (Ruthroff configuration using an external 100 nH Inductor)
B0008K7575A00 Gnd Pin #1 L_Ruthroff L=100 nH Balanced Pin #4
Rs R=75 O
Rd R=75 O
Unbalanced Pin #2
Balanced Pin #3
Figure 2 The Balun with an external inductor in a Ruthroff implementation with an external 100 nH inductor. Data is compared to the basic Guanella configuration (dashed lines). Other inductor values can be used with different results.
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 B0008K7575A00
Rev B
Typical Performance (using DC Block in Ruthroff configuration)
B0008K7575A00 Cgnd C=2000 pF Gnd Pin #1 L_Ruthroff L=100 nH Balanced Pin #4
Rs R=75 O
Rd R=75 O
Cin C=91 pF
Unbalanced Pin #2
Balanced Pin #3
Figure 3 The Balun with an external inductor in a Ruthroff implementation with an external 100 nH inductor and DC block to enhance insertion and return loss. Data is compared to the basic Guanella configuration (dashed lines). Other capacitor and inductor values can be used with different results.
USA/Canada: Toll Free: Europe:
(315) 432-8909 (800) 411-6596 +44 2392-232392
Available on Tape and Reel for Pick and Place Manufacturing.
B0008K7575A00
Rev B
Typical Performance (using DC Block to enhance low frequency insertion and return loss)
B0008K7575A00 Cgnd C=2000 pF Gnd Pin #1 Balanced Pin #4
Rs R=75 O
Rd R=75 O
Unbalanced Pin #2 Cin C=91 pF
Balanced Pin #3
Figure 4 The Balun with an external 100 pF capacitor to enhance insertion and return loss. Data is compared to the basic Guanella configuration (dashed lines). Other capacitor values can be used with different results.
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 B0008K7575A00
Rev B
Distortion Considerations:
This balun does NOT contain any ferrite materials and are as such distortion free. Very, very low levels of distortion can arise from dissimilar metals on the contact pads of the part (Cu-Ni-Au) and from inter-metallic contaminations within the part.
Power Handling Considerations:
TBD.
USA/Canada: Toll Free: Europe:
(315) 432-8909 (800) 411-6596 +44 2392-232392
Available on Tape and Reel for Pick and Place Manufacturing.
B0008K7575A00
Rev B
Mounting Configuration:
In order for Xinger surface mount components to work optimally, the proper impedance transmission lines must be used to connect to the RF ports. If this condition is not satisfied, insertion loss, Isolation and VSWR may not meet published specifications. All of the Xinger components are constructed from softboard composites which possess excellent electrical and mechanical stability having X and Y thermal coefficient of expansion (CTE) of 25 ppm/C. An example of the PCB footprint used in the testing of these parts is shown below. 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.
3X TRANSMISSION LINE .019 [0.49] SQ. Top View (Near-side) 2 1
3X TRANSMISSION LINE .019 [0.49] SQ. Top View (Near-side) 2 1
3X .016 [0.40] SQ. .043 [1.10]
3
4
3X .016 [0.40] SQ. .043 [1.10]
3
4
Circuit Pattern Footprint Pad (s) Solder Resist Dimensions are in Inches [Millimeters] Mounting Footprint
Circuit Pattern Footprint Pad (s) Solder Resist Dimensions are in Inches [Millimeters] Mounting Footprint
The material used for testing is 8mil Rogers 4003. For a ground plane spacing much larger than this the single via at pin 5 should be replaced with at least 2 via and if possible a coplanar ground.
Available on Tape and Reel for Pick and Place Manufacturing.
USA/Canada: Toll Free: Europe:
(315) 432-8909 (800) 411-6596 +44 2392-232392

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