BD2425NCSR Datasheet, PDF (1/4 Pages) Anaren Microwave – Ultra Low Profile 0404 Balun for the Cambridge Silicon Radio M1824 UNIFI-1 Chipset

Model BD2425NCSR
Rev C
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:
ROOM (25°C)
• 2400 – 2500 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
Min.
2400
10
Typ.
50
Matched
15
0.35
0.2
2
Max
2500
1.0
0.5
4
CMRR
35
Power Handling
1
Operating Temperature
-55
+85
* Insertion Loss stated at room temperature (Insertion Loss is approximately 0.1 dB higher at +85 ºC)
** Stated performance is based on the proper matching network described in the data sheet
Outline Drawing
Unit
MHz
Ω
Ω
dB
dB
Watts
ºC
Top View (Near-side)
Side View
Bottom View (Far-side)
.041±.004
[1.04±0.10]
.041±.004
[1.04±0.10]
Dimensions are in Inches [Millimeters]
Mechanical Outline
.022±.002
.012 [0.30]
[0.56±0.05] _{.012 [0.30]} ¹
2
3x.010
[0.25]
Pin Designation
1
GND / DC Feed
+ RF GND
2 Unbalanced Port
3 Balanced Port
4 Balanced Port
4
.020 [0.51]
.020 [0.51]
3
3x.010
[0.25]
Tolerances are Non-Cumulative
Available on Tape
and Reel for Pick and
Place Manufacturing.
USA/Canada:
Toll Free:
Europe:
[phone]
[phone]
[phone]