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Model BD4859N50100AHF
Rev B
Ultra Low Profile 0404 Balun
50 to 100 Balanced
escri  tion
The BD4859N50100AHF 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 covering 802.11a Uni-
Band II & III and the Japanese ISM band (4.9 GHz). The BD4859N50100AHF is
ideal for high volume manufacturing and delivers higher performance than traditional
ceramic baluns. The BD4859N50100AHF has an unbalanced port impedance of
50& and a 100& 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
BD4859N50100AHF is available on tape and reel for pick and place high volume
manufacturing.
Detailed Electrical Specifications: Specifications subject to change without notice.
Features:
" 4800 5900 MHz
" 0.57 mm Height Profile
" 50 Ohm to 2 x 50 Ohm
" Low Insertion Loss
" 802.11a Uni-Band II & III
" Home Cordless Compliant
" Surface Mountable
" Tape & Reel
" Non-conductive Surface
" RoHS Compliant
" Halogen Free
ROOM (25?/SPAN>
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Parameter
Min.
Typ.
Max
Unit
Frequency
4800
5900
MHz
Unbalanced Port Impedance
50
Balanced Port Impedance
100
Return Loss
15
20
dB
Insertion Loss*
0.4
0.6
dB
Amplitude Balance
0.9
1.5
dB
Phase Balance
3
8
Degrees
CMRR
26
dB
Power Handling
1
Watts
Operating Temperature
-55
+85
篊
* Insertion Loss stated at room temperature (Insertion Loss is approximately 0.1 dB higher at +85 篊)
Outline Drawing
1.04
?10
1.04
?10
.56
?06
.30
.30
.50
.50
3x .25
3x .25
1
2
4
3
m Vi  w  F  r- i
i    Vi  w
Vi  w  N   r- i
Mechanical Outline
Dimensions are in Millimeters
Tolerances are Non-Cumulative
Unbalanced Port
GND / DC Feed
+ RF GND
4
3
Designation
Pin
1
2
Balanced Port
Balanced Port
3x .27
3x .27
.24
.24