Model BD2326NCSR
Rev A
Ultra Low Profile 0404 Balun for the
Cambridge Silicon Radio M1824 UNIFI-1 Chipset
Description
The BD2425NCSR is a low cost, low profile sub-miniature unbalanced to
balanced transformer designed specifically for Cambridge Silicon Radio’s UNITI-1
WiFi chipset. The BD2425NCSR is ideal for high volume manufacturing and delivers
higher performance than traditional ceramic baluns. The BD2425NCSR matched
exactly to the differential port impedances of the UNIFI-1 device. The BD2425NCSR
enables single ended signals to be applied to differential ports of this Cambridge
Silicon Radio chipsets. The output ports have equal amplitude (-3dB) with 180
degree phase differential. The BD2425NCSR is available on tape and reel for pick
and place high volume manufacturing.
Detailed Electrical Specifications:
Specifications subject to change without notice.
Features:
•
•
•
•
•
•
•
•
•
2300 – 2600 MHz
0.56 mm Height Profile
Matched for CSR’s UNIFI-1
Low Insertion Loss
Surface Mountable
Tape & Reel
Non-conductive
RoHS Compliant
Halogen free
Parameter
Frequency
Unbalanced Port Impedance
Balanced Port Impedance
Return Loss
Insertion Loss*
Amplitude Balance
Phase Balance
CMRR
Power Handling
Operating Temperature
Min.
2300
ROOM (25°C)
°
Typ.
50
Matched
10
13
1
Max
2600
Unit
MHz
0.4
5
21
-55
0.5
6
1
+85
dB
dB
dB
Degrees
dB
Watts
ºC
* Insertion Loss stated at room temperature (Insertion Loss is approximately 0.1 dB higher at +85 ºC)
Outline Drawing
Top View (Near-side)
Side View
Bottom View (Far-side)
.041
±.004
[1.04
±0.10
]
.041
±.004
[1.04
±0.10
]
.022
±.002
[0.56
±0.05
]
.012 [0.30]
1
.012 [0.30]
2
3x.010
[0.25]
4
3
3x.010
[0.25]
.020 [0.51]
.020 [0.51]
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
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 BD2326NCSR
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
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 BD2425NCSR
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
.
ØA
ØC
ØD
QUANTITY/REEL
4000
TABLE 1
REEL DIMENSIONS (inches [mm])
ØA
7.00 [177.8]
B
0.32 [8.0]
2.0 [50.8]
ØC
ØD
0.512 [13.0]
B
USA/Canada:
Toll Free:
Europe:
(315) 432-8909
(800) 411-6596
+44 2392-232392
Available on Tape and
Reel for Pick and Place
Manufacturing.
无线连接
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
