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Model BD2425N50ATI
Rev A
Ultra Low Profile 0404 Balun for TI transceiver CC2500 50 to 127+j34 Balanced
(Anaren Application Note Ann-2003) Description
The BD2425N50ATI is a low cost, low profile sub-miniature unbalanced to balanced transformer designed for differential inputs and output locations on modern chipsets in an easy to use surface mount package. The BD2425N50ATI is ideal for high volume manufacturing and delivers higher performance than traditional ceramic baluns. The BD2425N50ATI has an unbalanced port impedance of 50 and 127+ j34 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 BD2425N50ATI is available on tape and reel for pick and place high volume manufacturing.
Detailed Electrical Specifications: Specifications subject to change without notice.
Features: 2400 - 2500 MHz 0.65mm Height Profile 50 Ohm to 2 x 63.5+j17 Ohm Low Insertion Loss Surface Mountable Tape & Reel Non-conductive Surface RoHS Compliant Zigbee ROOM (25C) Parameter Frequency Unbalanced Port Impedance** Balanced Port Impedance** Return Loss** Insertion Loss* ** Power Handling Operating Temperature -55 Min. 2300 50 127+j34 17 0.4 1 0.6 TBD +85 Typ. Max 2600 Unit MHz
13
dB dB Watts C
* Insertion Loss stated at room temperature (Insertion Loss is approximately 0.1 dB higher at +85 C) * Stated performance assumes proper matching network found in application note: ANN-2003
Outline Drawing
Top View (Near-side) Side View Bottom View (Far-side)
[
.041+.003 -.002 1.05+0.08 -0.06
]
[
.041+.003 -.002 1.05+0.08 -0.06
]
.012 [0.30] .024 .0025 [0.62 0.064] 0.12 [0.30] 1
2 3x.010 [0.25] 4 3 3x.010 [0.25]
4X .020 [0.50]
Pin Designation GND / DC Feed 1 + RF GND
Dimensions are in Inches [Millimeters] Mechanical Outline
2 Unbalanced Port 3 Balanced Port 4 Balanced Port
Tolerances are Non-Cumulative
Sales Desk USA: Voice: (800) 544-2414 Fax: (315) 432-9121 Sales Desk Europe: Voice: (+44) 2392 232392 Fax: (+44) 2392 251369
Model BD2425N50ATI
Rev A
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 ceramic filled PTFE composites which possess excellent electrical o and mechanical stability having X and Y thermal coefficient of expansion (CTE) of 17 ppm/ C. An example of the PCB footprint used in the testing of these parts is shown below. An example of a DC-biased footprint is also 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 With DC Bias
3X .011 [0.29] .008 [0.21] 3X .011 [0.29] Plated thru hole to ground
.014 [0.36]
.020 [0.50]
.008 [0.21]
3X Transmission Line
.020 [0.50]
Circuit Pattern Footprint Pad (s) Solder Resist Dimensions are in Inches [Millimeters] Mounting Footprint
Sales Desk USA: Voice: (800) 544-2414 Fax: (315) 432-9121 Sales Desk Europe: Voice: (+44) 2392 232392 Fax: (+44) 2392 251369
Model BD2425N50ATI
Rev A
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.
OA
OC
OD
QUANTITY/REEL
4000
TABLE 1 REEL DIMENSIONS (inches [mm]) OA 7.00 [177.8] B 0.32 [8.0] 2.0 [50.8] OC OD 0.512 [13.0]
B
Sales Desk USA: Voice: (800) 544-2414 Fax: (315) 432-9121 Sales Desk Europe: Voice: (+44) 2392 232392 Fax: (+44) 2392 251369

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