Model BD0205F5050AHF

Model BD0205F5050AHF
Rev B
Ultra Low Profile 1608 Balun
50Ω to 50Ω Balanced
Description
The BD0205F5050AHF is a low profile sub-miniature balanced to unbalanced
transformer designed for differential input locations on data conversion devices such
as A to D and D to A converters. In an easy to use surface mount package covering
75 MHz to 1000 MHz and with CMRR performances over 2x that of the incumbent
wire wound products, this transformer is optimized to offer improved SFDR
management during operation of the data converter device. The BD0205F5050AHF
is ideal for high volume manufacturing and is higher performance and smaller form
factor than traditional wire wound transformers. The BD0205F5050AHF has an
unbalanced port impedance of 50Ω and a 50Ω balanced port impedance. This
transformation enables single ended signals to be applied to differential ports on the
data converter devices. The output ports have equal amplitude (-3dB) with 180
degree phase differential. The BD0205F5050AHF 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)
Features:
•
•
•
•
•
•
•
•
•
•
•
Parameter
70 – 1000 MHz (IL 3dB BW)
200-500 MHz ( IL 1dB BW)
0.83 mm Height Profile
50 Ohm to 2 x 25 Ohm
Excellent CMRR (36dB typical)
Input to Output DC Isolation
Surface Mountable
Tape & Reel
Non-conductive Top Surface
RoHS Compliant
Halogen Free
Min.
Frequency
Unbalanced Port Impedance
Balanced Port Impedance
Return Loss
Insertion Loss*
Amplitude Balance
Phase Balance
CMRR
Power Handling
Operating Temperature
Typ.
70
4
Max
Min.
1000
200
50
50
4.6
3.0
0.2
1
36
11
3.4
0.6
3
2
+85
-55
Typ.
50
50
13
0.9
0.2
1
36
Max
Unit
500
MHz
Ohm
Ohm
dB
dB
dB
Degrees
dB
Watts
ºC
1.1
0.6
3
2
+85
-55
* 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
4.10±.10
.84±.08
Bottom View (Far-side)
1
2
3
4x .96
10
9
2.10±.10
4
2x .35
5
4x .35
4x .28
Orientation
Marker
Mechanical Outline
Dimensions are in Millimeters
Orientation
Marker
Pin
1
2
3
4
5
Designation
Unbalanced
OPEN
GND
GND
GND
Pin
6
7
8
9
10
8
7
6
10x .30
10x .22
Designation
Balanced port 1
Open
Balanced port 2
GND
GND
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Asia:
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+86 512-62749282
Model BD0205F5050AHF
Rev. B
Typical Broadband Performance: 0 - 8.0 GHz.
Insertion Loss
-3
-0.3
-6
-0.6
-9
-0.9
-12
-1.2
-15
-1.5
Amplitude Balance
1.5
15
1
10
0.5
5
Frequency [MHz]
CM RR
8000
7500
7000
6500
6000
5500
5000
4500
4000
3500
3000
2500
2000
1500
1000
0
-2
-5
-8
-11
-14
-17
-20
-23
-26
-29
-32
-35
-38
-41
-44
-47
-50
500
[dB]
8000
7500
7000
6500
6000
5500
5000
Frequency [MHz]
Frequency [MHz]
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USA/Canada:
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(315) 432-8909
(800) 411-6596
+44 2392-232392
+86 512-62749282
8000
7500
7000
6500
6000
5500
5000
4500
4000
3500
3000
2500
2000
1500
8000
7500
7000
6500
6000
5500
5000
4500
4000
3500
-20
3000
-2
2500
-15
2000
-1.5
1500
-10
500
-1
1000
0
-5
0
0
-0.5
500
deg
20
1000
4500
Phase Balance
2
0
4000
Frequency [MHz]
Frequency [MHz]
[dB]
3500
0
8000
7500
7000
6500
6000
5500
5000
4500
4000
3500
3000
2500
2000
-3.6
1500
-36
1000
-3.3
0
-3
-33
3000
-2.7
-30
2500
-2.4
-27
2000
-2.1
-24
1500
-1.8
-21
500
-18
1000
[dB]
0
500
[dB]
Return Loss - Input
0
Model BD0205F5050AHF
Rev B
Typical Performance: 0 MHz. to 1000 MHz.
Insertion Loss
-3
-0.3
-6
-0.6
-9
-0.9
-12
-1.2
-15
-1.5
800
850
900
950
1000
900
950
1000
600
550
650
650
600
550
500
450
400
350
300
250
200
150
100
1000
950
900
850
800
750
700
650
600
-20
550
-15
-2
500
-1.5
450
-10
400
-1
0
0
-5
50
0
-0.5
350
850
5
300
750
10
250
800
1
0.5
200
700
15
150
750
1.5
deg
20
100
500
Phase Balance
2
50
700
Amplitude Balance
0
450
Frequency [MHz]
Frequency [MHz]
[dB]
400
350
0
950
1000
900
850
800
750
700
650
600
550
500
450
400
350
300
250
200
-3.6
150
-36
100
-3.3
0
-3
-33
300
-2.7
-30
250
-2.4
-27
200
-2.1
-24
150
-1.8
-21
100
-18
50
[dB]
0
50
[dB]
Return Loss - Input
0
Frequency [MHz]
Frequency [MHz]
CMRR
0
-6
-12
-18
-24
-36
-42
-48
-54
-60
-66
1000
950
900
850
800
750
700
650
600
550
500
450
400
350
300
250
200
150
100
50
-72
0
[dB]
-30
Frequency [MHz]
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www.anaren.com
USA/Canada:
Toll Free:
Europe:
Asia:
(315) 432-8909
(800) 411-6596
+44 2392-232392
+86 512-62749282
Model BD0205F5050AHF
Rev. B
Application in ADC Frontend:
Modern Analog-to-Digital Converter (ADC) system often uses differential architecture to suppress the even-order
harmonics. The performance of ADC system is heavily influenced by amplitude and phase imbalances arising from the
ADC frontend, especially in high frequency applications. Anaren’s multi-layer balun BD0205F5050AHF offers superb
amplitude and phase balance performance over wide frequency range, translating to excellent SFDR performance of
the ADC system. BD0205F5050AHF is a ferrite free design eliminating related inter-modulation and other non-linear
effects. BD0205F5050AHF provides wideband impedance match, resulting in improvement of gain flatness at high
frequencies, which in turn reduces input drive requirement. Anaren’s highly repeatable manufacturing process results
in little part to part variation, ensuring consistent performance in production.
The schematic of a typical ADC front end application is shown below. In conjunction with many high speed ADC ICs, a
bandwidth of 70MHz to 250MHz can be obtained for -1dB ripple of gain flatness. Differential load R1 and R2 are 33
ohm, slightly higher than the theoretical 25 ohm, to increase the voltage gain and reduce the required input drive, while
keeping acceptable return loss. Optional series resistors, R5, R6, R7 and R8 are used to limit the amount of charge
injection from the unbuffered ADC back into the analog input. Optional RC circuits, R3, R4, C4 and C5 further improve
SDFR in many circumstances by supplying an additional current path to neutralize the charge injection.
Anaren Balun
BD0205F5050AHF
Typical ADC frontend schematic using BD0205F5050AHF
Visit us at
www.anaren.com
USA/Canada:
Toll Free:
Europe:
Asia:
(315) 432-8909
(800) 411-6596
+44 2392-232392
+86 512-62749282
Model BD0205F5050AHF
Rev B
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 organic PTFE based composites which possess excellent
electrical and mechanical stability. Xinger components are compliant to a variety of ROHS and Green standards and
ready for Pb-free soldering processes. Pads are Gold plated with a Nickel barrier.
An example of the PCB footprint used in the testing of these parts is 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.
4.02
.89 4x
PART ORIENTATION (TOP VIEW)
.21 4x
1.01 2x
.29 10x
Plated thru
hole(s) to
Ground
.29 6x
.36 10x
1.66 2x
Circuit Pattern
Footprint Pad (s)
3x
Transmission
Line
Solder Resist
Dimensions are in Millimeters
Mounting Footprint
Visit us at
www.anaren.com
USA/Canada:
Toll Free:
Europe:
Asia:
(315) 432-8909
(800) 411-6596
+44 2392-232392
+86 512-62749282