B0008K5050A00 Rev Ultra Low Profile 0606 Balun 50Ω to 50Ω Balanced Description The B0008K5050A00 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 B0008K5050A00 is ideal for high volume manufacturing and is higher performance than traditional wire wound baluns. The B0008K5050A00 has an unbalanced port impedance of 50Ω and a 50Ω 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. NOTE: Currently, only Engineering samples are available for this Part. Detailed Electrical Specifications: Specifications subject to change without notice. ROOM (25°°C) Features: • • • • • • • • • Parameter 48 – 870 MHz DVB-C & DVB-T 0.38 mm Height Profile 50 Ohm to 2 x 25 Ohm Broadcast Bands Low Insertion Loss Surface Mountable RoHS Compliant Halogen Free Min. Frequency Unbalanced Port Impedance Balanced Port Impedance Return Loss , Insertion Loss* ** Amplitude Balance*** Phase Balance*** CMRR Power Handling Operating Temperature Typ. Max Unit 870 MHz Ω Ω dB dB dB Degrees dB Watts ºC 48 11 50 50 14 0.9 3.5 40 8 1.2 3.8 41 TBD +85 -55 * Insertion Loss stated at room temperature (Insertion Loss is approximately 0.15 dB higher at +85 ºC). 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 further below on pages 2-5. Outline Drawing Top View (Near-side) Side View Bottom View (Far-side) .062 [1.57] .012 [0.30] 2 1 2 1 .062 [1.57] 3 .015 [0.39] .043 [1.10] .015 [0.39] 4 .012 [0.30] 4 3 .012 [0.30] Pin Designation 1 GND Dimensions are in Inches [Millimeters] Mechanical Outline 2 Unbalanced Port 3 Balanced Port 4 Balanced Port Available on Tape and Reel for Pick and Place Manufacturing. Tolerances are Non-Cumulative USA/Canada: Toll Free: Europe: (315) 432-8909 (800) 411-6596 +44 2392-232392 Model B0008K5050A00 Rev Typical Performance (test/specification condition, basic configuration) B0008K5050A00 Gnd Pin #1 Balanced Pin #4 Rs R=50 O Unbalanced Pin #2 Rd R=50 O 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. B0008K5050A00 Rev Typical Performance (Ruthroff configuration using an external 91 nH inductor) B0008K5050A00 Gnd Pin #1 Rs R=50 O L_Ruthroff L=91 nH Balanced Pin #4 Rd R=50 O Unbalanced Pin #2 Balanced Pin #3 Figure 2 The Balun with an external inductor in a Ruthroff implementation with an external 91 nH inductor. Data is compared to the basic Guanella configuration (dashed lines). Other inductor values can be used with different results. Typical Performance (using DC Block to enhance low frequency insertion & return loss) 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 B0008K5050A00 Rev B0008K5050A00 Cgnd C=2000 pF Gnd Pin #1 L_Ruthroff L=100 nH Rs R=50 O Balanced Pin #4 Rd R=50 O Cin C=150 pF Unbalanced Pin #2 Balanced Pin #3 Figure 3 The Balun with an external 150 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. USA/Canada: Toll Free: Europe: (315) 432-8909 (800) 411-6596 +44 2392-232392 Available on Tape and Reel for Pick and Place Manufacturing. B0008K5050A00 Rev 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. 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 B0008K5050A00 Rev 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 o 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 3X TRANSMISSION LINE .019 [0.49] SQ. .019 [0.49] SQ. Top View (Near-side) 3X .016 [0.40] SQ. 2 1 3 4 3X .016 [0.40] SQ. .043 [1.10] Circuit Pattern 2 1 3 4 .043 [1.10] Circuit Pattern Footprint Pad (s) Solder Resist Top View (Near-side) Footprint Pad (s) Dimensions are in Inches [Millimeters] Mounting Footprint 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. USA/Canada: Toll Free: Europe: (315) 432-8909 (800) 411-6596 +44 2392-232392 Available on Tape and Reel for Pick and Place Manufacturing.