BGA3018 [NXP]
RF/MICROWAVE WIDE BAND MEDIUM POWER AMPLIFIER;
| 型号： | BGA3018 |
| 厂家： | 
NXP |
| 描述： | RF/MICROWAVE WIDE BAND MEDIUM POWER AMPLIFIER 放大器 射频 微波 功率放大器 |
| 文件： | 总15页 (文件大小：1064K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AN11228
BGA301x Wideband Variable Gain Amplifier Application
Rev. 1 — 22 October 2012
Application note
Document information
Info
Content
Keywords
BGA3015, BGA3018, CATV, Line-up, VGA, Evaluation board
Abstract
This application note describes the schematic and layout requirements
for using the BGA3015 and BGA3018 drop amplifiers in a CATV VGA
application.
AN11228
NXP Semiconductors
BGA301x Wideband Variable Gain Amplifier Application
Revision history
Rev
Date
Description
v.1
20121022
First publication
Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
AN11228
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Application note
Rev. 1 — 22 October 2012
2 of 15
AN11228
NXP Semiconductors
BGA301x Wideband Variable Gain Amplifier Application
1. Introduction
With the use of NXP’s BGA301x drop amplifiers and the BAP70Q quad pin diode
attenuator a wideband Variable Gain Amplifier (VGA) has been made which can be used
as line-up amplifier in CATV networks.
The combination of NXP’s BGA301x amplifiers and BAP70Q pin diode parts a high gain
amplifier with low noise figure and wide dynamic range can be made.
This application note describes the evaluation board schematic and layout requirements,
and shows the test results.
2. System features
•
75 Ω input and output impedance
Gain control dynamic range of 20 dB
Flat gain between 40 MHz and 1003 MHz
Unconditionally stable
•
•
•
•
Excellent input and output return loss
3. Customer evaluation kit contents
The evaluation kit contains the following items:
ESD safe casing
BGA301x VGA evaluation board
•
•
AN11228
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© NXP B.V. 2012. All rights reserved.
Application note
Rev. 1 — 22 October 2012
3 of 15
AN11228
NXP Semiconductors
BGA301x Wideband Variable Gain Amplifier Application
4. Application Information
The evaluation circuit can be seen in figure 1 and the corresponding PCB is shown in
figure 2. Table 1 shows the bill of materials.
4.1 Evaluation board circuit
Fig 1. VGA evaluation circuit
The connector pinning is as followed:
-
-
-
-
-
“GND” : Ground pins
“Vamp1” : +8 V power supply for amplifier U1
“Vamp2” : +8 V power supply for amplifier U3
“Vcc”
“Vctr”
: +8 V power supply for pin diode attenuator U2
: Pin diode attenuator control voltage (1 … 3 V)
At connector J1 the RF signal from an external optical receiver is applied, where C1
provides DC-blocking, followed by L1 for S11 matching of the BGA3018 amplifier (U1).
The feedback of amplifier U1 is provided via R1 & R2 with C2 for DC-blocking between
the input and output pins of the amplifier. Two resistors are used to lower the influence of
the parasitic capacitance from the circuit board. The output of amplifier U1 is matched
with L3 and C5 and C6 provides the DC-blocking towards pin-diode attenuator U2.
The signal out of the first amplifier has a large dynamic range and with use of the
BAP70Q pin diode attenuator (U2) the RF signals can be attenuated in such a way that a
stable RF signal will be available at the output of the pin-diode attenuator. The stable
output signal is amplified again by the BGA3015 amplifier (U3).The output of amplifier U2
is matched for S22 with L6 and C14 provides the DC-blocking towards the output
connector J2.
AN11228
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© NXP B.V. 2012. All rights reserved.
Application note
Rev. 1 — 22 October 2012
4 of 15
AN11228
NXP Semiconductors
BGA301x Wideband Variable Gain Amplifier Application
4.2 Evaluation board layout
PCB material
= FR4
PCB thickness
PCB size
εr
= 1.5 mm
= 40 mm x 70 mm
= 4.6
Copper thickness = 35 µm
Fig 2. VGA evaluation board layout
For optimum distortion performance it is important to have enough ground vias
underneath and around the MMICs ground pins. This lowers the inductance to the
ground plane. The evaluation board is made with two layer FR4 material.
AN11228
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© NXP B.V. 2012. All rights reserved.
Application note
Rev. 1 — 22 October 2012
5 of 15
AN11228
NXP Semiconductors
BGA301x Wideband Variable Gain Amplifier Application
4.3 Bill of materials
Table 1.
Circuit
Reference
Evaluation board BOM
Description Qty Mfr
Manufacturer number Supplier Supplier part
number
U1
U2
U3
BGA3018
BAP70Q
BGA3015
10 nF
1
1
1
9
NXP
NXP
NXP
BGA3018
BAP70Q
BGA3015
NXP
BGA3018
NXP
BAP70Q
NXP
BGA3015
C1, C2, C4
Murata GRM155R71E103KA01D
Digikey
490-1312-1-ND
C6, C7, C8
C11, C13, C14
C3, C12, C15
C9
100 pF
270 pF
0.5 pF
3
1
2
3
3
3
3
5
Murata GRM1555C1H101JZ01D
Murata GRM1555C1H271JA01D
Digikey
Digikey
490-3458-1-ND
490-1294-1-ND
490-1263-1-ND
490-2617-1-ND
490-5216-1-ND
311-470LRCT-ND
311-300LRCT-ND
311-0.0LRCT-ND
C5, C10
Murata GRM1555C1HR50CZ01D Digikey
L1, L3, L6
L2, L4, L5
R1, R4, R11
R2, R14, R15
3.9 nH
Murata LQG15HS3N9S02D
Murata BLM18HE152SN1D
Digikey
Digikey
Digikey
Digikey
Digikey
Choke
470 Ω
Yageo
Yageo
Yageo
RC0402FR-07470RL
RC0402FR-07300RL
RC0402FR-070RL
300 Ω
R3, R6, R10,
R12, R13
0 Ω (Jumper)
R7
0 Ω (Jumper)
1200 Ω
1
2
1
2
1
Yageo
Yageo
Yageo
Bomar
Molex
RC0603FR-070RL
RC0402FR-071K2L
RC0402FR-072K2L
861V509ER6
Digikey
Digikey
Digikey
Mouser
Digikey
RC0603FR-
070RL-ND
R5, R9
R8
311-1.20KLRCT-
ND
2200 Ω
311-2.20KLRCT-
ND
J1, J2
J3
75Ω F-
678-861V509ER6
connector
Header 6
90121-0766
WM8112-ND
AN11228
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© NXP B.V. 2012. All rights reserved.
Application note
Rev. 1 — 22 October 2012
6 of 15
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NXP Semiconductors
BGA301x Wideband Variable Gain Amplifier Application
5. Measurement results
5.1 S-Parameters
0
0
(5) (6) (7)
-5
-5
(1) (2) (3) (4)
-10
-15
-20
-25
-30
-10
-15
-20
(1) (2) (3) (4)
50
-25
-30
(5) (6) (7)
40 140 240 340 440 540 640 740 840 940 1040 1140
0
100
Frequency [MHz]
150
200
Frequency [MHz]
a. S11: 40 MHz – 1140 MHz
b. S11: 300 kHz – 200 MHz
(1): Vctr = 2.13 V
(2): Vctr = 1.80 V
(3): Vctr = 1.64 V
(4): Vctr = 1.50 V
(5): Vctr = 1.39 V
(6): Vctr = 1.29 V
(7): Vctr = 1.12 V
(1): Vctr = 2.13 V
(2): Vctr = 1.80 V
(3): Vctr = 1.64 V
(4): Vctr = 1.50 V
(5): Vctr = 1.39 V
(6): Vctr = 1.29 V
(7): Vctr = 1.12 V
Fig 3. Input matching (S11); typical
0
0
-5
-5
(5) (6) (7)
(5) (6) (7)
-10
-15
-20
-10
-15
-20
-25
-25
(1) (2) (3) (4)
(1) (2) (3) (4)
-30
-30
40 140 240 340 440 540 640 740 840 940 1040 1140
0
50
100
150
200
Frequency [MHz]
Frequency [MHz]
a. S22: 40 MHz – 1140 MHz
c. S22: 300 kHz – 200 MHz
(1): Vctr = 2.13 V
(2): Vctr = 1.80 V
(3): Vctr = 1.64 V
(4): Vctr = 1.50 V
(5): Vctr = 1.39 V
(6): Vctr = 1.29 V
(7): Vctr = 1.12 V
(1): Vctr = 2.13 V
(2): Vctr = 1.80 V
(3): Vctr = 1.64 V
(4): Vctr = 1.50 V
(5): Vctr = 1.39 V
(6): Vctr = 1.29 V
(7): Vctr = 1.12 V
Fig 4. Output matching (S22); typical
AN11228
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© NXP B.V. 2012. All rights reserved.
Application note
Rev. 1 — 22 October 2012
7 of 15
AN11228
NXP Semiconductors
BGA301x Wideband Variable Gain Amplifier Application
35
32
30
28
26
24
22
20
18
16
14
12
(1)
(2)
(3)
(1)
30
25
20
15
10
5
(2)
(3)
(4)
(5)
(6)
(4)
(5)
(6)
(7)
(7)
0
0
50
100
150
200
40 140 240 340 440 540 640 740 840 940 1040 1140
Frequency [MHz]
Frequency [MHz]
a. S21: 40 MHz – 1140 MHz
d. S21: 300 kHz – 200 MHz
(1): Vctr = 2.13 V
(2): Vctr = 1.80 V
(3): Vctr = 1.64 V
(4): Vctr = 1.50 V
(5): Vctr = 1.39 V
(6): Vctr = 1.29 V
(7): Vctr = 1.12 V
(1): Vctr = 2.13 V
(2): Vctr = 1.80 V
(3): Vctr = 1.64 V
(4): Vctr = 1.50 V
(5): Vctr = 1.39 V
(6): Vctr = 1.29 V
(7): Vctr = 1.12 V
Fig 5. Gain (S21); typical
25
20
15
10
5
25
(5)
20
15
10
5
(5)
(4)
(3)
(4)
(3)
(2)
(1)
(2)
(1)
0
0
40 140 240 340 440 540 640 740 840 940 1040 1140
0
50
100
150
200
Frequency [MHz]
Frequency [MHz]
a. K-factor: 40 MHz – 1140 MHz
b. K-factor: 300 kHz – 200 MHz
(1): Vctr = 2.13 V
(2): Vctr = 1.80 V
(3): Vctr = 1.64 V
(4): Vctr = 1.50 V
(5): Vctr = 1.39 V
(6): Vctr = 1.29 V
(7): Vctr = 1.12 V
(1): Vctr = 2.13 V
(2): Vctr = 1.80 V
(3): Vctr = 1.64 V
(4): Vctr = 1.50 V
(5): Vctr = 1.39 V
(6): Vctr = 1.29 V
(7): Vctr = 1.12 V
Fig 6. K-factor; typical
AN11228
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© NXP B.V. 2012. All rights reserved.
Application note
Rev. 1 — 22 October 2012
8 of 15
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NXP Semiconductors
BGA301x Wideband Variable Gain Amplifier Application
5.2 Distortion
-50
(5) (6) (7)
-55
-60
-65
-70
-75
-80
-85
(1) (2) (3) (4)
0
200
400
600
800
1000
Frequency [MHz]
(1): Vctr = 2.13 V
(2): Vctr = 1.80 V
(3): Vctr = 1.64 V
(5): Vctr = 1.50 V
(6): Vctr = 1.39 V
(7): Vctr = 1.29 V
132 channels NTSC , Vo = 30dBmV
Fig 7. Composite triple beat (CTB) at different gain settings
-50
-52
-54
-56
-58
-60
-62
-64
-66
(5) (6) (7)
-68
(1) (2) (3) (4)
-70
0
200
400
600
800
1000
Frequency [MHz]
(1): Vctr = 2.13 V
(2): Vctr = 1.80 V
(3): Vctr = 1.64 V
(5): Vctr = 1.50 V
(6): Vctr = 1.39 V
(7): Vctr = 1.29 V
132 channels NTSC , Vo = 30dBmV
Fig 8. Composite second order (CSO) at different gain settings
AN11228
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© NXP B.V. 2012. All rights reserved.
Application note
Rev. 1 — 22 October 2012
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AN11228
NXP Semiconductors
BGA301x Wideband Variable Gain Amplifier Application
5.3 Noise figure
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
(7)
(5) (6)
(1) (2) (3) (4)
10
210
410
610
810
1010
Frequency [MHz]
(1): Vctr = 2.13 V
(2): Vctr = 1.80 V
(3): Vctr = 1.64 V
(5): Vctr = 1.50 V
(6): Vctr = 1.39 V
(7): Vctr = 1.29 V
Fig 9. Noise figure at different gain settings
AN11228
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© NXP B.V. 2012. All rights reserved.
Application note
Rev. 1 — 22 October 2012
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BGA301x Wideband Variable Gain Amplifier Application
6. Abbreviations
Table 2. Abbreviations
Acronym
Description
AC
Alternating Current
CATV
DC
Community Antenna TeleVision
Direct Current
ESD
MMIC
PCB
RF
Electro Static Discharge
Monolithic Microwave Integrated Circuit
Printed Circuit Board
Radio Frequency
SMD
Surface Mounted Device
AN11228
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Application note
Rev. 1 — 22 October 2012
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AN11228
NXP Semiconductors
BGA301x Wideband Variable Gain Amplifier Application
7. Legal information
Semiconductors accepts no liability for any assistance with applications or
customer product design. It is customer’s sole responsibility to determine
whether the NXP Semiconductors product is suitable and fit for the
customer’s applications and products planned, as well as for the planned
application and use of customer’s third party customer(s). Customers should
provide appropriate design and operating safeguards to minimize the risks
associated with their applications and products.
7.1 Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. NXP Semiconductors does not give any
representations or warranties as to the accuracy or completeness of
information included herein and shall have no liability for the consequences
of use of such information.
NXP Semiconductors does not accept any liability related to any default,
damage, costs or problem which is based on any weakness or default in the
customer’s applications or products, or the application or use by customer’s
third party customer(s). Customer is responsible for doing all necessary
testing for the customer’s applications and products using NXP
7.2 Disclaimers
Limited warranty and liability — Information in this document is believed to
be accurate and reliable. However, NXP Semiconductors does not give any
representations or warranties, expressed or implied, as to the accuracy or
completeness of such information and shall have no liability for the
consequences of use of such information. NXP Semiconductors takes no
responsibility for the content in this document if provided by an information
source outside of NXP Semiconductors.
Semiconductors products in order to avoid a default of the applications and
the products or of the application or use by customer’s third party
customer(s). NXP does not accept any liability in this respect.
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
authorization from national authorities.
Evaluation products — This product is provided on an “as is” and “with all
faults” basis for evaluation purposes only. NXP Semiconductors, its affiliates
and their suppliers expressly disclaim all warranties, whether express,
implied or statutory, including but not limited to the implied warranties of non-
infringement, merchantability and fitness for a particular purpose. The entire
risk as to the quality, or arising out of the use or performance, of this product
remains with customer.
In no event shall NXP Semiconductors be liable for any indirect, incidental,
punitive, special or consequential damages (including - without limitation -
lost profits, lost savings, business interruption, costs related to the removal
or replacement of any products or rework charges) whether or not such
damages are based on tort (including negligence), warranty, breach of
contract or any other legal theory.
Notwithstanding any damages that customer might incur for any reason
whatsoever, NXP Semiconductors’ aggregate and cumulative liability
towards customer for the products described herein shall be limited in
accordance with the Terms and conditions of commercial sale of NXP
Semiconductors.
In no event shall NXP Semiconductors, its affiliates or their suppliers be
liable to customer for any special, indirect, consequential, punitive or
incidental damages (including without limitation damages for loss of
business, business interruption, loss of use, loss of data or information, and
the like) arising out the use of or inability to use the product, whether or not
based on tort (including negligence), strict liability, breach of contract, breach
of warranty or any other theory, even if advised of the possibility of such
damages.
Right to make changes — NXP Semiconductors reserves the right to make
changes to information published in this document, including without
limitation specifications and product descriptions, at any time and without
notice. This document supersedes and replaces all information supplied prior
to the publication hereof.
Notwithstanding any damages that customer might incur for any reason
whatsoever (including without limitation, all damages referenced above and
all direct or general damages), the entire liability of NXP Semiconductors, its
affiliates and their suppliers and customer’s exclusive remedy for all of the
foregoing shall be limited to actual damages incurred by customer based on
reasonable reliance up to the greater of the amount actually paid by
customer for the product or five dollars (US$5.00). The foregoing limitations,
exclusions and disclaimers shall apply to the maximum extent permitted by
applicable law, even if any remedy fails of its essential purpose.
Suitability for use — NXP Semiconductors products are not designed,
authorized or warranted to be suitable for use in life support, life-critical or
safety-critical systems or equipment, nor in applications where failure or
malfunction of an NXP Semiconductors product can reasonably be expected
to result in personal injury, death or severe property or environmental
damage. NXP Semiconductors and its suppliers accept no liability for
inclusion and/or use of NXP Semiconductors products in such equipment or
applications and therefore such inclusion and/or use is at the customer’s
own risk.
7.3 Trademarks
Notice: All referenced brands, product names, service names and
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. NXP Semiconductors makes no
representation or warranty that such applications will be suitable for the
specified use without further testing or modification.
trademarks are property of their respective owners.
.
Customers are responsible for the design and operation of their applications
and products using NXP Semiconductors products, and NXP
AN11228
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© NXP B.V. 2012. All rights reserved.
Application note
Rev. 1 — 22 October 2012
12 of 15
AN11228
NXP Semiconductors
BGA301x Wideband Variable Gain Amplifier Application
8. List of figures
Fig 1.
Fig 2.
Fig 3.
Fig 4.
Fig 5.
Fig 6.
Fig 7.
VGA evaluation circuit.......................................4
VGA evaluation board layout ............................5
Input matching (S11); typical.............................7
Output matching (S22); typical..........................7
Gain (S21); typical ............................................8
K-factor; typical .................................................8
Composite triple beat (CTB) at different gain
settings..............................................................9
Fig 8.
Fig 9.
Composite second order (CSO) at different gain
settings..............................................................9
Noise figure at different gain settings..............10
AN11228
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© NXP B.V. 2012. All rights reserved.
Application note
Rev. 1 — 22 October 2012
13 of 15
AN11228
NXP Semiconductors
BGA301x Wideband Variable Gain Amplifier Application
9. List of tables
Table 1. Evaluation board BOM......................................6
AN11228
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© NXP B.V. 2012. All rights reserved.
Application note
Rev. 1 —22 October 2012
14 of 15
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BGA301x Wideband Variable Gain Amplifier Application
10. Contents
1.
2.
3.
Introduction .........................................................3
System features...................................................3
Customer evaluation kit contents......................3
4.
Application Information......................................4
Evaluation board circuit......................................4
Evaluation board layout......................................5
Bill of materials...................................................6
4.1
4.2
4.3
5.
Measurement results ..........................................7
S-Parameters.....................................................7
Distortion............................................................9
Noise figure......................................................10
5.1
5.2
5.3
6.
Abbreviations ....................................................11
7.
Legal information ..............................................12
Definitions ........................................................12
Disclaimers.......................................................12
Trademarks......................................................12
7.1
7.2
7.3
8.
List of figures.....................................................13
List of tables......................................................14
Contents.............................................................15
9.
10.
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in the section 'Legal information'.
© NXP B.V. 2012.
All rights reserved.
For more information, visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
Date of release: 22 October 2012
Document identifier: AN11228
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