Transcript
Model B0205F50200AHF Rev A
Ultra Low Profile 1608 Balun 50Ω to 200Ω Balanced Description The B0205F50200AHF is a low profile sub-miniature balanced to unbalanced transformer designed for differential input locations on data conversion devices (A to D converters). In an easy to use surface mount package covering 200 MHz to 500 MHz and superior CMRR performance, this transformer is optimized to offer improved SFDR management during operation of the data converter device. The B0205F50200AHF is ideal for high volume manufacturing and is higher performance and smaller form factor than traditional wire wound transformers. The B0205F50200AHF has an unbalanced port impedance of 50Ω and a 200Ω 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 B0205F50200AHF 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: • • • • • • • • • • •
125 –700 MHz (IL 3dB BW) 200 – 500 MHz (IL 1dB BW) 0.83 mm Height Profile 50 Ohm to 2 x 100 Ohm Excellent CMRR Input to Output DC Isolation Surface Mountable Tape & Reel Non-conductive Top Surface RoHS Compliant Halogen Free
Parameter
Min.
Frequency Unbalanced Port Impedance Balanced Port Impedance Return Loss Insertion Loss* Amplitude Balance Phase Balance CMRR Power Handling Operating Temperature
200
Typ. 50 200 17.7 1.3 0.1 1.3 38.2
13.9
Max
Unit
500
MHz Ω Ω dB dB dB Degrees dB Watts ºC
1.6 0.4 3.1 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
Bottom View (Far-side) 1
.89±.08
4.10±.10
2
3
4x .955
10
9
2.10±.10
4
5
2x .350
4x .350
4x .280
Orientation Marker
Mechanical Outline Dimensions are in Millimeters
Orientation Marker
Pin 1 2 3 4 5
Designation Input NC Open GND GND
Pin 6 7 8 9 10
10x .300
8
7
6
10x .220
Designation Balanced port 1 NC Balanced port 2 GND GND
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Model B0205F50200AHF Rev. A
Typical Broadband Performance: 0 - 8.0 GHz. Return Loss - Input
Insertion Loss
Frequency [MHz]
7500
8000
8000
4500
4000
3500
3000
2500
2000
1500
500
8000
7500
7000
-20 6500
-15
-2 6000
-1.5
5500
-10
5000
-1
4500
-5
4000
-0.5
1000
0
0
0
3500
7500
5
3000
7000
0.5
2500
7000
10
2000
6500
1
1500
6000
15
500
6500
20
deg
2 1.5
1000
6000
Phase Balance
Amplitude Balance
0
5500
Frequency [MHz]
Frequency [MHz]
[dB]
5000
0
8000
7500
7000
6500
6000
5500
5000
4500
4000
3500
3000
2500
2000
1500
1000
0
500
-36
5500
-33
5000
-30
4500
-27
4000
-24
3500
-21
3000
-18
2500
[dB]
[dB]
-15
2000
-9 -12
1500
-6
500
-3
0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12 -13 -14 -15 1000
0
Frequency [MHz]
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]
CM RR
Frequency [MHz]
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USA/Canada: Toll Free: Europe: Asia:
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Model B0205F50200AHF Rev A
Typical Performance: 100 MHz. to 600 MHz. Insertion Loss
-3
-0.3
-6
-0.6
-9
-0.9
-12
-1.2
-15
-1.5
Frequency [MHz]
500
525
550
575
600
550
575
600
400
375
425
425
400
375
350
325
300
275
250
225
200
175
150
600
575
550
525
500
475
-20 450
-2 425
-15
400
-1.5
375
-10
350
-1
325
-5
300
-0.5
125
0
100
0
275
525
5
250
475
0.5
225
500
10
200
450
1
175
475
15
150
450
1.5
deg
2
20
125
350
Phase Balance
Amplitude Balance
100
325
Frequency [MHz]
Frequency [MHz]
[dB]
300
275
100
600
575
550
525
500
475
450
425
400
375
350
325
300
275
250
225
200
-3.6 175
-36 150
-3.3 125
-3
-33
250
-2.7
-30
225
-2.4
-27
200
-2.1
-24
175
-1.8
-21
150
-18
125
[dB]
0
100
[dB]
Return Loss - Input 0
Frequency [MHz]
CMRR 0 -5 -10 -15
-25 -30 -35 -40 -45 600
575
550
525
500
475
450
425
400
375
350
325
300
275
250
225
200
175
150
125
-50 100
[dB]
-20
Frequency [MHz]
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USA/Canada: Toll Free: Europe: Asia:
(315) 432-8909 (800) 411-6596 +44 2392-232392 +86 512-62749282
Model B0205F50200AHF Rev. A
Application in ADC Frontend: Modern Analog-to-Digital Converter (ADC) system often uses differential architecture to suppress the even-order harmonics, minimize noise interference and keep dynamic range high. 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 B0205F50200AHF offers superb amplitude and phase balance performance over wide frequency range, translating to excellent SFDR performance of the ADC system. B0205F50200AHF is a ferrite free design eliminating related inter-modulation and other non-linear effects. B0205F50200AHF has impendence transforming ratio of 1:4 with voltage gain of 6dB higher than 1:1 balun, which reduces the input drive requirement. Anaren’s highly repeatable manufacturing process results in little part to part variation, ensuring consistent performance in production. A typical ADC front end application is shown below. In conjunction with many high speed ADC ICs, bandwidth of 100MHz to 250MHz can be obtained for -1dB ripple of gain flatness. R1 and R2, in shunt with the input impedance of ADC, supply the balun with required differential load. The series resistors, R5 and R6 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. These values are also chosen to limit or extend the ADC application bandwidth.
ADC frontend schematic for IF 100 MHz to 250MHz using B0205F50200AHF A low frequency solution can be realized by adding additional tuning components C6, L1 and L2. The -1dB ripple of gain flatness is achieved for IF band of 50MHz to 110MHz.
ADC frontend schematic for IF 50MHz to 110MHz using B0205F50200AHF 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 B0205F50200AHF 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 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. To supply common mode voltage offset to the analog-to-digital converter, DC blocking capacitors are needed at the balanced port (pins 6 & 8). 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
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USA/Canada: Toll Free: Europe: Asia:
(315) 432-8909 (800) 411-6596 +44 2392-232392 +86 512-62749282
