Application Notes

AN11453
BGU7258 802.11 a/n/ac Low Noise Amplifier 5-6 GHz WiFi
LNA MMIC with Bypass
Rev. 2 — 16 March 2016
Application note
Document information
Info
Content
Keywords
BGU7258, 5-6GHz LNA, 5 GHz ISM, WiFi (WLAN)
Abstract
This document provides circuit schematic, layout, BOM and typical
evaluation board performance for a 5-6 GHz WiFi (WLAN) LNA with
bypass
AN11453
NXP Semiconductors
BGU7258 802.11 a/n/ac Low Noise Amplifier 5-6 GHz WiFi LNA MMIC
with Bypass
Revision history
Rev
Date
Description
2
20160316
Chapter 5 “Thermal info” added
1
20141003
First publication
Contact information
For additional information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
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BGU7258 802.11 a/n/ac Low Noise Amplifier 5-6 GHz WiFi LNA MMIC
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1. Introduction
The BGU7258 is a fully integrated MMIC Low Noise Amplifier (LNA) for wireless receiver
applications in the 5 GHz to 6 GHz ISM band. Manufactured in NXP’s high performance
SiGe:C technology, the BGU7258 couples best-in-class gain, noise figure, linearity and
efficiency with the process stability and ruggedness that are the hallmarks of SiGe
technology. The BGU7258 features a robust temperature-compensated internal bias
network and an integral bypass / shutdown feature that stabilizes the DC operating point
over temperature and enables operation in the presence of high input signals, while
minimizing current consumption in bypass (standby) mode. The 1.6 mm x 1.6 mm
footprint coupled with only two external components, makes the circuit board
implementation of the BGU7258 LNA the smallest IEEE 802.11ac LNA with bypass
solution on the market, ideal for space sensitive applications.
Key Benefits:









AN11453
Application note
Fully integrated, high performance LNA with built-in bypass
Exceptional 1.6 dB noise figure with 13 mA current consumption
Extremely low bypass current (2 µA)
Single supply 3.0 V to 3.6 V operation
Integrated concurrent 2.4 GHz notch filter and temperature stabilized bias
network
High IIP3 and low EVM
High ESD protection of 2 kV (HBM) on all pins
Small 0.5 mm pitch, 1.6 x 1.6 x 0.5 mm QFN-style package, MSL 1 at 260⁰C
Compliant to Directive 2002/95/EC, regarding Restriction of Hazardous
Substances (RoHS) following NXP’s RHF-2006 indicator D (dark green)
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BGU7258 802.11 a/n/ac Low Noise Amplifier 5-6 GHz WiFi LNA MMIC
with Bypass
BGU7258
CTRL
RFin
1
2
6
Vcc
Bias / control
2.4GHz
notch
5 RFout
3, 4, 7
Fig 1.
BGU7258 Block Diagram
2. Design and Application
The overall intent of this application note is to demonstrate the performance of the
BGU7258 in a 5 GHz LNA application e.g. 802.11a/n/ac “MIMO” WiFi (WLAN). Key
requirements for this type of WLAN application are gain, noise figure, linearity, input and
output return loss, and turn on/off time.
The BGU7258 itself is a fully integrated MMIC consisting of an RF Gain block, internal
temperature compensated bias network, bypass mode functionality, 2.4 GHz notch filter
to suppress jammers from 2.4 GHz ISM Band, ESD protection, internal RF matching, and
internal DC blocking. Only two external components, a 4.7 nF DC-decoupling capacitor
on the power supply line and an optional shunt 0.3 pF capacitor for matching at RF input
is necessary.
On NXP’s Application Board, the BGU7258 can be also used without the matching
capacitor at the RF_IN, but in this case, the gain will decrease by ~0.5 dB and the noise
figure increases by ~ 0.1 dB at 5.8 GHz.
The 5 GHz WiFi LNA evaluation board simplifies the evaluation of the BGU7258
application. The evaluation board enables testing of the device performance and requires
no additional support circuitry. The board is fully assembled with the BGU7258 MMIC,
and includes the 4.7 nF DC-decoupling capacitor and the 0.3 pF input matching
capacitor. The board is also supplied with two SMA connectors for input and output
connection to RF test equipment.
A 50 ohm “through line” is provided at the top of the evaluation board in case the user
wishes to verify RF connector and grounded coplanar wave guide losses for deembedding purposes.
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BGU7258 802.11 a/n/ac Low Noise Amplifier 5-6 GHz WiFi LNA MMIC
with Bypass
Fig 2.
AN11453
Application note
BGU7258 Evaluation Board 5-6 GHz WiFi LNA EVB
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BGU7258 802.11 a/n/ac Low Noise Amplifier 5-6 GHz WiFi LNA MMIC
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2.1 Application Circuit Schematic
Fig 3.
BGU7258 Evaluation Board: Schematic
Note: Figure 3 is the schematic for BGU7258 evaluation board with only two external
components (Matching shunt capacitor on RF_IN and DC-decoupling capacitor, placed
near the VCC pin).
The BGU7258 can be also used without the matching capacitor at the RF_IN, but then
the gain will be ~0.5 dB less and the noise figure increases ~0.1 dB at 5.8 GHz!
2.2 PCB Layout
AN11453
Application note
-
Use controlled impedance lines (50 Ω) for RF_in & RF_out
-
Place the decoupling capacitor as close as possible to the device pin 6 (Vcc)
-
Proper grounding of the RF GND especially pin 7 (ground pad) is essential for
good RF-performance. Connect the GND pins direct to ground plane and use
through vias on ground pad (size and amount depends on the technology used)
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BGU7258 802.11 a/n/ac Low Noise Amplifier 5-6 GHz WiFi LNA MMIC
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2.3 Board Layout
AN11453
Application note
Fig 4.
BGU7258 Evaluation Board
Fig 5.
BGU7258 Stack of the PCB material
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BGU7258 802.11 a/n/ac Low Noise Amplifier 5-6 GHz WiFi LNA MMIC
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2.4 Application Board Bill-Of-Material
Table 1.
BGU7258 5-6 GHz WiFi LNA Part List
Customer can choose their preferred vendor but should be aware that the performance could be
affected. “0402” case size passives are used on NXP’s evaluation board.
AN11453
Application note
Item
Position
on
Layout
Reference
(Fig 2)
Type
Vendor
Value
1
Z1
BGU7258
BGU7258
NXP SEMICONDUCTORS
BGU7258
2
Z2
GRM155
Murata
4.7 nF
3
RF_IN
GJM155
X1, X2
Murata
Emerson Network
Power
0.3 pF
4
CON-SMA-1
5
X3
C1
Shunt
Capacitor
RF_IN,
RF_OUT
Vcc/LNA
gain/bypass
Molex
CON-3PIN
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BGU7258 802.11 a/n/ac Low Noise Amplifier 5-6 GHz WiFi LNA MMIC
with Bypass
3. Typical Application Board Test Result
This section presents the results of a typical BGU7258 as used in NXP’s Application
Circuit. Unless otherwise noted, all measurement references are at the SMA connectors
on the evaluation board.
3.1.1 S-Parameters
Figures 6 and 7 below show the broadband (10 MHz – 10 GHz) and narrowband
s-parameters for the BGU7258 respectively. Figure 8 shows the measured stability
factor from 1 GHz – 20 GHz.
20
15
10
5
0
S-Parameters
(dB)
-5
-10
-15
S21 Measured
S11 Measured
-20
S22 Measured
-25
S12 Measured
-30
0
1
2
3
4
5
6
7
8
9
10
Frequency (GHz)
Fig 6.
BGU7258 Broadband S-Parameters VCC = 3.3V 25C ambient
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BGU7258 802.11 a/n/ac Low Noise Amplifier 5-6 GHz WiFi LNA MMIC
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20
15
10
5
0
S-Parameters
(dB)
S21 Measured
S11 Measured
-5
S22 Measured
-10
S12 Measured
-15
-20
-25
-30
4.9
5
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
6
Frequency (GHz)
Fig 7.
BGU7258 Narrowband S-Parameters VCC = 3.3V 25C ambient
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BGU7258 802.11 a/n/ac Low Noise Amplifier 5-6 GHz WiFi LNA MMIC
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1000
K Factor
100
10
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Frequency (GHz)
Fig 8.
BGU7258 Broadband K Factor (Rollett Stability Factor) VCC = 3.3V 25C ambient
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BGU7258 802.11 a/n/ac Low Noise Amplifier 5-6 GHz WiFi LNA MMIC
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3.1.2 S-Parameters in Bypass mode
Figure 9 and 10 below shows the gain, input return loss, and output return loss of the
BGU7258 in bypass mode.
0
-5
-10
S-Parameters
-15
(dB)
-20
S21 Measured
S11 Measured
-25
S22 Measured
-30
0
1
2
3
4
5
6
7
8
9
10
Frequency (GHz)
Fig 9.
BGU7258 Broadband S-Parameters Bypass Mode Vcc = 3.3V 25C ambient
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BGU7258 802.11 a/n/ac Low Noise Amplifier 5-6 GHz WiFi LNA MMIC
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0
-5
-10
S-Parameters
-15
(dB)
-20
S21 Measured
S11 Measured
-25
S22 Measured
-30
4.9
5
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
6
Frequency (GHz)
Fig 10. BGU7258 Narrowband S-Parameters Bypass Mode Vcc = 3.3V 25C ambient
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BGU7258 802.11 a/n/ac Low Noise Amplifier 5-6 GHz WiFi LNA MMIC
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3.1.3 Noise Figure in Gain mode
The noise figure is physically measured at the SMA connectors of the evaluation board.
The total loss of the connectors and the printed circuit board are 0.5dB at 5.5 GHz
(RF_IN to RF_OUT). After de-embedding the input portion of connector and PCB losses
(0.25dB at 5.5 GHz) to the device pins, the noise figure is around 1.6dB at 5.5 GHz.
Figure 11 below shows both the noise figure at the EVB level and the de-embedded
noise figure.
2.4
2.2
2
1.8
NF
(dB)
1.6
Noise Figure [dB] EVB Level
1.4
Noise Figure [dB] De-Embedded
1.2
1
4.90
5.00
5.10
5.20
5.30
5.40
5.50
5.60
5.70
5.80
5.90
6.00
Frequency (GHz)
Fig 11. BGU7258 Noise Figure VCC = 3.3V 25C ambient
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3.1.4 Small Signal Linearity in Gain mode
Figure 12 shows the input-referred IP3 level for the BGU7258, measured with 5 MHz
tone spacing, -25 dBm input power per tone, and a swept center frequency from 5 GHz
to 6 GHz.
15
14
13
12
11
iIP3
10
(dBm)
9
8
7
6
5
4.90
5.00
5.10
5.20
5.30
5.40
5.50
5.60
5.70
5.80
5.90
6.00
Frequency (GHz)
Fig 12. BGU7258 Swept input-IP3 5MHz Tone Spacing Pin=-25dBm/Tone VCC = 3.3V 25C ambient
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BGU7258 802.11 a/n/ac Low Noise Amplifier 5-6 GHz WiFi LNA MMIC
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3.1.5
Large Signal Linearity in Gain mode
Figure 13 shows the input referred P1dB level from 5 GHz to 6 GHz.
0
-1
-2
-3
-4
iP1dB
(dBm)
-5
-6
-7
-8
-9
-10
4.90
5.00
5.10
5.20
5.30
5.40
5.50
5.60
5.70
5.80
5.90
6.00
Frequency (GHz)
Fig 13. BGU7258 input-P1dB vs. frequency
AN11453
Application note
VCC = 3.3V 25C ambient
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BGU7258 802.11 a/n/ac Low Noise Amplifier 5-6 GHz WiFi LNA MMIC
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Figure 14 shows Error Vector Magnitude (EVM) as a function of output power, with
BGU7258 in Gain mode. Specifically, these data are captured using a 256 QAM OFDM
waveform MSC9-VHT40. Note that the output power is the average power over the
burst.
5
4
3
EVM (%)
2
EVM 5190 MHz
1
EVM 5795 MHz
0
-10
-8
-6
-4
-2
0
2
4
Output Power (dBm)
Fig 14. BGU7258 EVM vs. burst average output power MCS9-VHT40 256 QAM VCC = 3.3V 25C ambient
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BGU7258 802.11 a/n/ac Low Noise Amplifier 5-6 GHz WiFi LNA MMIC
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3.1.6 Out-of-band spurious
In order to characterize the BGU7258 under potential jamming conditions, a 5.180 GHz
signal is applied to the evaluation board at an RF input power level of -30 dBm. A
second tone is applied at 2.462 GHz and swept over a range of input power levels. The
2.462 GHz “leakage” and the second harmonic at 4.924 GHz are measured. The
measurement set-up is shown in Figure 15. As a function of the 2.462 GHz jammer input
level, Figure 16 reports the 2.462 GHz jammer output level, the 4.924 GHz second
harmonics output level, and the 5.180 GHz Gain.
Fig 15. Out-of-band suppression test setup (if necessary use additional low pass filter at signal generator 2
output)
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14
0
-5
13
-10
12
-15
-20
11
5180 MHz
Gain (dB)
-25
10
-30
-35
9
4924 MHz 2.H and
2462 MHz Jammer
POUT (dBm)
-40
8
-45
5180 MHz Gain
-50
4924 MHz 2.H POUT
7
-55
2462 MHz Jammer POUT
6
-60
-20
-18
-16
-14
-12
-10
-8
-6
-4
-2
0
2462 MHz Jammer PIN (dBm)
Fig 16. BGU7258 2462 MHz Jammer Level at Output, 4924 MHz second harmonics and 5180 MHz Gain vs.
Jammer Input Power
VCC = 3.3V 25C ambient
5180 MHz input at -30 dBm
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3.1.7 Harmonics
By applying large RF signals at the input during bypass mode (OFF mode) operation,
harmonics can be created by the LNA and then emanate from its RF input. In a real
operating environment, these harmonic signals can be re-emitted by the antenna. The
measurement set up used for characterizing the harmonics generated by the BGU7258
in bypass mode is shown in Figure 17. A 5.500 GHz signal is used for the measurement
results shown in Figure 18.
Fig 17. Harmonic test setup
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BGU7258 802.11 a/n/ac Low Noise Amplifier 5-6 GHz WiFi LNA MMIC
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-30
Harmonic Level
(dBm/1 MHz)
-40
2nd Harmonic CW
-50
3rd Harmonic CW
-60
2nd Harmonic WFM1
-70
3rd Harmonic WFM1
not measurable (Noise
floor)
-80
-90
-100
-110
0
1
2
3
4
5
6
7
8
9
10
Average Input Power Level (dBm)
(1) CW – Continuous Wave (only for test / comparison)
(2) WFM1 - 802.11a 6 Mbps (BPSK) 90% duty cycle (worst case signal)
Fig 18. BGU7258 (Bypass Mode) 2nd and 3rd Reflected Harmonic Levels 5.5 GHz Fundamental
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3.1.8 LNA Turn ON-OFF Time
The following diagram shows the setup to test LNA Turn ON and Turn OFF time.
The waveform generator is set to square wave mode and the output amplitude at 3.3V
peak with 50Ω output impedance. The RF signal generator output level is -20dBm at 5.5
GHz. It is very important to minimize or compensate for the time delay skew between the
trigger signal and the detector signal. Also note that the scope input impedances are set
to 50Ω on both channels.
Fig 19. LNA Turn On and Turn Off time test setup
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3.1.8.1
LNA Turn ON Time
Figure 20 below shows a screen capture from an oscilloscope used to record the turn on
time of the BGU7258.
100Hz 0/3.3V Square Wave, applied on Venable pin, measured from 50% of input pulse to 90% of maximum output power
Fig 20. BGU7258 Turn On Time
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3.1.8.2
LNA Turn OFF Time
Figure 21 below shows an oscilloscope screen capture with the turn off time for the
BGU7258.
100Hz 0/3.3V Square Wave, applied on Venable pin, measured from 50% of input pulse to 10% of maximum output
power
Fig 21. BGU7258 Turn Off Time
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4. Summary of the Typical Evaluation Board Test Result
Table 2.
Typical results measured on the BGU7258 5-6 GHz WiFi LNA Evaluation Board
with 0.3 pF matching capacitor at the RF_IN
Operating frequency 4.9-5.925 GHz, testing at 5.1 GHz and 5.9 GHz in Gain mode unless
otherwise specified, Temp = 25°C. Unless noted, all measurements are done with SMAconnectors as reference plane.
Parameter
Symbol
Value
Unit
Supply Voltage
VCC
3.3
V
Supply Current
ICC
12.5
mA
ByPass Current
Noise Figure [1]
Power Gain
Input Return Loss
Output Return Loss
Reverse Isolation
Ibypass
1.0
μA
@ 5.1 GHz
NF
1.6
dB
@ 5.9 GHz
NF
1.7
dB
@ 5.1 GHz
Gp
13.8
dB
@ 5.9 GHz
Gp
12.7
dB
@ 5.1 GHz
IRL
12.5
dB
@ 5.9 GHz
IRL
23.0
dB
@ 5.1 GHz
ORL
20.0
dB
@ 5.9 GHz
ORL
16.0
dB
@ 5.1 GHz
ISLrev
-21.0
dB
@ 5.9 GHz
ISLrev
-20.0
dB
Power Gain
@ 5.1 GHz
Gp
-7.7
dB
(bypass mode)
@ 5.9 GHz
Gp
-7.6
dB
Input Return Loss
@ 5.1 GHz
IRL
9.0
dB
(bypass mode)
@ 5.9 GHz
IRL
10.0
dB
Output Return Loss
@ 5.1 GHz
ORL
21.0
dB
(bypass mode)
@ 5.9 GHz
ORL
16.0
dB
Input Third Order Intercept Point
Two Tones:
@ 5.1 GHz
IIP3
26.7
dBm
@ 5.9 GHz
IIP3
28.1
dBm
@ 5.1 GHz
OIP3
19.0
dBm
@ 5.9 GHz
OIP3
20.5
dBm
@ 5.1 GHz
iP1dB
-4.7
dBm
@ 5.9 GHz
iP1dB
-4.0
dBm
@ 5.1 GHz
oP1dB
8.1
dBm
@ 5.9 GHz
oP1dB
7.7
dBm
@ 5.1 GHz
EVM
2.2
%
5 MHz Tone Spacing
Power: -5 dBm/tone
(bypass mode)
Output Third Order Intercept Point
Two Tones:
5 MHz Tone Spacing
Power: -5 dBm/tone
(bypass mode)
Input 1dB Gain Compression Point
Output 1dB Gain Compression Point
Error Vector Magnitude
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Parameter
Symbol
Value
Unit
Pout = 0dBm (256 QAM, MSC9-VHT- @ 5.9 GHz
40)
EVM
2.3
%
Input Third Order Intercept Point
@ 5.1 GHz
IIP3
7.9
dBm
@ 5.9 GHz
IIP3
8.6
dBm
@ 5.1 GHz
OIP3
21.5
dBm
@ 5.9 GHz
OIP3
21.2
dBm
-1.0
dBm
Two Tones:
5 MHz Tone Spacing
power: -25 dBm/tone
Output Third Order Intercept Point
Two Tones:
5 MHz Tone Spacing
power: -25 dBm/tone
1 dB input/output cross-compression
with jammer
@ 5180 MHz
with 2462 MHz
Jammer
Harmonics generated at RF input
Pin = 4 dBm (5.5 GHz)
2.H. @ 11.0
GHz
H2
-50
dBm
CW signal input
3.H. @ 16.5
GHz
H3
<-90
dBm
Stability ( 1 - 20 GHz)
K
>1
LNA Turn ON/OFF Time
Ton
100
nS
Toff
19
nS
(bypass mode)
[1]
AN11453
Application note
PCB and connector losses excluded.
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 16 March 2016
© NXP B.V. 2016. All rights reserved.
26 of 30
AN11453
NXP Semiconductors
BGU7258 802.11 a/n/ac Low Noise Amplifier 5-6 GHz WiFi LNA MMIC
with Bypass
5. Thermal info
The following temperature simulations are done based on the BGU7258 soldered onto
the NXP evaluation board (see Fig. 22) in still air and 85 C ambient temperature.
Part
number
BGU7258
JCbot [1]
JB [2]
JC [3]
Maximum Junction
Temperature
Ta
250 K/W
250 K/W
204 K/W
101 C
85 C
[1] Thermal resistance from junction to exposed diepad
[2] Thermal resistance from junction to board
[3] Thermal characterization parameter junction to package top
Fig 22. BGU7258 reference position board temperature
AN11453
Application note
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 16 March 2016
© NXP B.V. 2016. All rights reserved.
27 of 30
AN11453
NXP Semiconductors
BGU7258 802.11 a/n/ac Low Noise Amplifier 5-6 GHz WiFi LNA MMIC
with Bypass
6. Legal information
6.1 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.
6.2 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.
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.
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.
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 accepts 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.
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.
Customers are responsible for the design and operation of their applications
and products using NXP Semiconductors products, and NXP
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.
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
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 noninfringement, 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, 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.
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.
6.3 Licenses
Purchase of NXP <xxx> components
<License statement text>
6.4 Patents
Notice is herewith given that the subject device uses one or more of the
following patents and that each of these patents may have corresponding
patents in other jurisdictions.
<Patent ID> — owned by <Company name>
6.5 Trademarks
Notice: All referenced brands, product names, service names and
trademarks are property of their respective owners.
<Name> — is a trademark of NXP B.V.
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
AN11453
Application note
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 16 March 2016
© NXP B.V. 2016. All rights reserved.
28 of 30
AN11453
NXP Semiconductors
BGU7258 802.11 a/n/ac Low Noise Amplifier 5-6 GHz WiFi LNA MMIC
with Bypass
7. List of figures
Fig 1.
Fig 2.
Fig 3.
Fig 4.
Fig 5.
Fig 6.
Fig 7.
Fig 8.
Fig 9.
Fig 10.
Fig 11.
Fig 12.
Fig 13.
Fig 14.
Fig 15.
Fig 16.
Fig 17.
Fig 18.
Fig 19.
Fig 20.
Fig 21.
Fig 22.
BGU7258 Block Diagram .................................. 4
BGU7258 Evaluation Board 5-6 GHz WiFi LNA
EVB ................................................................... 5
BGU7258 Evaluation Board: Schematic .......... 6
BGU7258 Evaluation Board ............................. 7
BGU7258 Stack of the PCB material ............... 7
BGU7258 Broadband S-Parameters VCC =
3.3V 25C ambient .......................................... 9
BGU7258 Narrowband S-Parameters VCC =
3.3V 25C ambient ........................................ 10
BGU7258 Broadband K Factor (Rollett Stability
Factor) VCC = 3.3V 25C ambient................ 11
BGU7258 Broadband S-Parameters Bypass
Mode Vcc = 3.3V 25C ambient ................... 12
BGU7258 Narrowband S-Parameters Bypass
Mode Vcc = 3.3V 25C ambient ................... 13
BGU7258 Noise Figure VCC = 3.3V 25C
ambient ........................................................... 14
BGU7258 Swept input-IP3 5MHz Tone Spacing
Pin=-25dBm/Tone VCC = 3.3V 25C ambient15
BGU7258 input-P1dB vs. frequency
VCC =
3.3V 25C ambient ........................................ 16
BGU7258 EVM vs. burst average output power
MCS9-VHT40 256 QAM VCC = 3.3V 25C
ambient ........................................................... 17
Out-of-band suppression test setup (if
necessary use additional low pass filter at signal
generator 2 output) ......................................... 18
BGU7258 2462 MHz Jammer Level at Output,
4924 MHz second harmonics and 5180 MHz
Gain vs. Jammer Input Power
VCC = 3.3V 25C ambient
5180 MHz input
at -30 dBm ...................................................... 19
Harmonic test setup ........................................ 20
BGU7258 (Bypass Mode) 2nd and 3rd Reflected
Harmonic Levels 5.5 GHz Fundamental ......... 21
LNA Turn On and Turn Off time test setup ..... 22
BGU7258 Turn On Time ................................. 23
BGU7258 Turn Off Time ................................. 24
BGU7258 reference position board temperature
........................................................................ 27
AN11453
Application note
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 16 March 2016
© NXP B.V. 2016. All rights reserved.
29 of 30
AN11453
NXP Semiconductors
BGU7258 802.11 a/n/ac Low Noise Amplifier 5-6 GHz WiFi LNA MMIC
with Bypass
8. Contents
1.
2.
2.1
2.2
2.3
2.4
3.
3.1.1
3.1.2
3.1.3
3.1.4
3.1.5
3.1.6
3.1.7
3.1.8
3.1.8.1
3.1.8.2
4.
5.
6.
6.1
6.2
6.3
6.4
6.5
7.
8.
Introduction ......................................................... 3
Design and Application....................................... 4
Application Circuit Schematic ............................. 6
PCB Layout ........................................................ 6
Board Layout ...................................................... 7
Application Board Bill-Of-Material ...................... 8
Typical Application Board Test Result .............. 9
S-Parameters ..................................................... 9
S-Parameters in Bypass mode......................... 12
Noise Figure in Gain mode............................... 14
Small Signal Linearity in Gain mode ................ 15
Large Signal Linearity in Gain mode ................ 16
Out-of-band spurious ....................................... 18
Harmonics ........................................................ 20
LNA Turn ON-OFF Time .................................. 22
LNA Turn ON Time .......................................... 23
LNA Turn OFF Time ......................................... 24
Summary of the Typical Evaluation Board Test
Result ................................................................. 25
Thermal info ....................................................... 27
Legal information .............................................. 28
Definitions ........................................................ 28
Disclaimers....................................................... 28
Licenses ........................................................... 28
Patents ............................................................. 28
Trademarks ...................................................... 28
List of figures..................................................... 29
Contents ............................................................. 30
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. 2016.
All rights reserved.
For more information, visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
Date of release: 16 March 2016
Document identifier: AN11453
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