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Model BD2425N50ATI
Rev A
Sales Desk USA: Voice: (800) 544-2414 Fax: (315) 432-9121
Sales Desk Europe: Voice: (+44) 2392 232392 Fax: (+44) 2392 251369
 
  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.
 
ROOM (25?/DIV>
??/DIV>
癈)
 
Parameter
Min.
Typ.
Max
Unit
Frequency
2300
 
2600
MHz
Unbalanced Port Impedance**
 
50
 
 
Balanced Port Impedance**
 
127+j34
 
 
Return Loss**
13
17
 
dB
Insertion Loss* **
 
0.4
0.6
dB
Power Handling
 
1
TBD
Watts
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
 
Operating Temperature
-55
 
+85
篊
* Insertion Loss stated at room temperature (Insertion Loss is approximately 0.1 dB higher at +85 篊)
* Stated performance assumes proper matching network found in application note: ANN-2003
Outline Drawing
 
Mechanical Outline
Dimensions are in Inches [Millimeters]
Tolerances are Non-Cumulative
Bottom View (Far-side)
Side View
Top View (Near-side)
Unbalanced Port
GND / DC Feed
+ RF GND
4
3
Designation
Pin
1
2
1
2
3
4
Balanced Port
.041
+.003
-.002
 
[
1.05
+0.08
-0.06]
.041
+.003
-.002
 
[
1.05
+0.08
-0.06]
.024
?0025
 [0.62
?.064
]
4X .020 [0.50]
Balanced Port
3x.010
 [0.25]
3x.010
 [0.25]
0.12 [0.30]
.012 [0.30]
 
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