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 B4859A53
Rev A
Ultra Small Low Profile 0603 Balun
50Ω to 100Ω Balanced
Description
The B4859A53 is an ultra-small low profile balanced to unbalanced transformer
designed for differential inputs and output locations on next generation wireless
chipsets in an easy to use surface mount package covering 802.11a Uni-Band II and
Uni-Band III and the Japanese ISM band (4.9GHz). The B4859A53 is ideal for high
volume manufacturing and is higher performance than traditional ceramic baluns.
The B4859A53 has an unbalanced port impedance of 50Ω and a 100Ω 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 B4859A53 is available on
tape and reel for pick and place high volume manufacturing.
Detailed Electrical Specifications: Specifications subject to change without notice.
ROOM (25°C)
Parameter Min. Typ. Max Unit
Frequency 4800 5900 MHz
Unbalanced Port Impedance 50 Ω
Balanced Port Impedance 100 Ω
Return Loss 12 15 dB
Insertion Loss* 0.7 0.9 dB
Amplitude Balance 0.5 1.0 dB
Phase Balance 5 7 Degrees
CMRR 27 dB
Power Handling 0.5 Watts
Features:
• 4800 – 5900 MHz
• 0.7mm Height Profile
• 50 Ohm to 2 x 50 Ohm
• Covers 802.11a Uni-Band II & III
• Low Insertion Loss
• Input to Output DC Isolation
• Surface Mountable
• Tape & Reel
• Non-conductive Surface
• RoHS Compliant
Operating Temperature -55 +85
ºC
* Insertion Loss stated at room temperature (Insertion Loss is approximately 0.1 dB higher at +85 ºC)
Outline Drawing
.008
[0.20]
4
56
3
2
1
NC
GND
Balanced Port 2
Balanced Port 1
GND
Unbalanced Port
Designation
5
4
2
1
6
3
Pin
Mechanical Outline
Dimensions are in Inches [Millimeters]
Tolerances are Non-Cumulative
Bottom View (Far-side)Side ViewTop View (Near-side)
Orientation
Marker Denotes
Pin Location
.063±.004
[1.60±0.10]
.034±.004
[0.86±0.10]
.027±.002
[0.69±0.05]
.020
[0.50]
.010
[0.25]
.020
[0.50]
