ADL5321ARKZ [ADI]
2.3 GHz to 4.0 GHz ¼ Watt RF Driver Amplifier; 2.3 GHz至4.0 GHz的那张瓦RF驱动器放大器型号: | ADL5321ARKZ |
厂家: | ADI |
描述: | 2.3 GHz to 4.0 GHz ¼ Watt RF Driver Amplifier |
文件: | 总16页 (文件大小:570K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
2.3 GHz to 4.0 GHz
¼ Watt RF Driver Amplifier
Data Sheet
ADL5321
FEATURES
Operation: 2.3 GHz to 4.0 GHz
Gain of 14.0 dB at 2.6 GHz
FUNCTIONAL BLOCK DIAGRAM
GND
(2)
OIP3 of 41.0 dBm at 2.6 GHz
P1dB of 25.7 dBm at 2.6 GHz
ADL5321
Noise figure: 4.0 dB at 2.6 GHz
Power supply voltage: 3.3 V to 5 V
Power supply current: 37 mA to 90 mA
Dynamically adjustable bias
BIAS
1
2
3
RFIN
GND RFOUT
No bias resistor required
Thermally efficient, MSL-1 rated SOT-89 package
Operating temperature range: −40°C to +105°C
Figure 1.
ESD rating of 2 kV (Class 3A)
APPLICATIONS
Wireless infrastructure
Automated test equipment
ISM/AMR applications
GENERAL DESCRIPTION
The ADL5321 incorporates a dynamically adjustable biasing
circuit that allows for the customization of OIP3 and P1dB
performance from 3.3 V to 5 V without the need for an external
bias resistor. This feature gives the designer the ability to tailor
driver amplifier performance to the specific needs of the design.
This feature also creates the opportunity for dynamic biasing of
the driver amplifier, where a variable supply is used to allow for
full 5 V biasing under large signal conditions and then can
reduce the supply voltage when signal levels are smaller and
lower power consumption is desirable. This scalability reduces
the need to evaluate and inventory multiple driver amplifiers
for different output power requirements from 22 dBm to
26 dBm output power levels.
The ADL5321 also delivers excellent adjacent channel leakage
ratio (ACLR) vs. POUT. For output powers up to 10 dBm rms, the
ADL5321 adds very little distortion to the output spectrum. At
2.6 GHz, the ACLR is −59 dB and a relative constellation error of
−46.6 dB (<0.5% EVM) at an output power of 10 dBm rms.
–30
ADJ CH LOW 2.6 GHZ
ALT CH LOW 2.6 GHZ
ADJ CH LOW 3.5 GHZ
–40
ALT CH UP 3.5 GHZ
–50
–60
–70
–80
–90
The ADL5321 is also rated to operate across the wide temper-
ature range of −40°C to +105°C for reliable performance in
designs that experience higher temperatures, such as power
amplifiers. The
1
∕ watt driver amplifier covers the 2.3 GHz to
4
–10
–5
0
5
10
15
20
4.0 GHz wide frequency range and only requires a few external
components to be tuned to a specific band within that wide
range. This high performance, broadband RF driver amplifier
is well suited for a variety of wired and wireless applications
including cellular infrastructure, ISM band power amplifiers,
defense equipment, and instrumentation equipment. A fully
populated evaluation board is available.
P
(dBm)
OUT
Figure 2. WiMAX 64 QAM, 10 MHz Bandwidth, Single Carrier
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rightsof third parties that may result fromits use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks andregisteredtrademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2008–2012 Analog Devices, Inc. All rights reserved.
ADL5321
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Typical Performance Characteristics ..............................................7
High Temperature and 3.3 V Operation ..................................... 10
Basic Layout Connections............................................................. 11
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Typical Scattering Parameters..................................................... 4
Absolute Maximum Ratings............................................................ 5
Thermal Resistance ...................................................................... 5
ESD Caution.................................................................................. 5
Pin Configuration and Function Descriptions............................. 6
Soldering Information and Recommended PCB Land
Pattern.......................................................................................... 11
Matching Procedure................................................................... 12
WiMAX Operation .................................................................... 13
Evaluation Board ............................................................................ 14
Outline Dimensions....................................................................... 16
Ordering Guide .......................................................................... 16
REVISION HISTORY
7/12—Rev. B to Rev. C
Change to Title.................................................................................. 1
Changes to Table 1............................................................................ 3
Replaced Table 2 ............................................................................... 4
Changes to Table 3 and Table 4................................................................. 5
Added Figure 20; Renumbered Sequentially......................................... 9
Moved High Temperature and 3.3 V Operation Section and added
Figure 30 to Figure 32................................................................................10
Changes to Soldering Information and Recommended PCB
Land Pattern Section and changes to Figure 22..................................11
6/10—Rev. A to Rev. B
Changes to General Description Section ...................................... 1
Changes to Operating Temperature Range, Table 3 .................... 4
Added High Temperature Operation Section, Figure 27, Figure 28,
and Figure 29................................................................................... 13
Changes to Ordering Guide .......................................................... 16
2/09—Rev. 0 to Rev. A
Updated Outline Dimensions....................................................... 15
Changes to Ordering Guide .......................................................... 15
5/08—Revision 0: Initial Version
Rev. C | Page 2 of 16
Data Sheet
ADL5321
SPECIFICATIONS
TA = 25°C, unless otherwise noted.
Table 1.
3.3 V
Typ
5 V
Typ
Parameter
Conditions
Min
Max Min
Max Unit
OVERALL FUNCTION
Frequency Range
FREQUENCY = 2.6 GHz
Gain1
2.3
4.0
2.3
4.0
GHz
12.6
0.3
13.2
14.0
0.4
14.6
dB
dB
vs. Frequency
100 MHz
vs. Temperature
vs. Supply
Output 1 dB Compression Point, P1dB
Output Third-Order Intercept, OIP3
Noise Figure
−40°C ≤ TA ≤ +85°C
3.2 V to 3.4 V, 4.75 V to 5.25 V
0.6
0.7
0.07
25.7
41
4.0
dB
dB
dBm
dBm
dB
0.16
22.0
31
Δf = 1 MHz, POUT = 5 dBm per tone
3.5
FREQUENCY = 3.5 GHz
Gain1
10.4
0.17
0.7
11.1
12.0
0.05
0.8
0.07
12.9
dB
dB
dB
dB
vs. Frequency
vs. Temperature
vs. Supply
100 MHz
−40°C ≤ TA ≤ +85°C
3.2 V to 3.4 V, 4.75 V to 5.25 V
0.2
Output 1 dB Compression Point, P1dB
Output Third-Order Intercept, OIP3
Noise Figure
24.7
27
4.3
25.7
38
4.9
dBm
dBm
dB
Δf = 1 MHz, POUT = 5 dBm per tone
Pin RFOUT
POWER INTERFACE
Supply Voltage
Supply Current
vs. Temperature
Power Dissipation
3.3
37
4.0
122
4.5
5
90
6.0
520
5.5
100
V
mA
mA
mW
−40°C ≤ TA ≤ +85°C
VCC = 3.3 V, VCC = 5 V
1 Guaranteed maximum and minimum specified limits on this parameter are based on six sigma calculations.
Rev. C | Page 3 of 16
ADL5321
Data Sheet
TYPICAL SCATTERING PARAMETERS
VCC = 5 V and TA = 25°C; the effects of the test fixture have been de-embedded up to the pins of the device.
Table 2.
S11
S21
S12
S22
Frequency
(MHz)
Magnitude (dB) Angle (°) Magnitude (dB) Angle (°) Magnitude (dB) Angle (°) Magnitude (dB) Angle (°)
2400
2450
2500
2550
2600
2650
2700
2750
2800
2850
2900
2950
3000
3050
3100
3150
3200
3250
3300
3350
3400
3450
3500
3550
3600
3650
3700
3750
3800
3850
3900
3950
4000
−4.54
−4.65
−4.79
−4.92
−5.04
−5.17
−5.33
−5.50
−5.70
−5.94
−6.25
−6.61
−7.03
−7.53
−8.12
−8.78
−9.47
−10.07
−10.45
−10.45
−10.02
−9.25
−8.28
−7.27
−6.34
−5.51
−4.78
−4.14
−3.60
−3.16
−2.78
−2.45
−2.17
129.60
126.65
123.62
120.44
117.31
114.43
111.78
109.21
106.84
104.85
103.23
101.91
101.06
100.92
101.82
104.04
107.91
113.72
121.55
130.87
140.04
147.61
153.06
156.76
159.01
160.11
160.43
160.36
160.07
159.62
158.95
158.24
157.64
11.90
11.89
11.88
11.87
11.85
11.83
11.80
11.77
11.74
11.71
11.66
11.62
11.56
11.50
11.40
11.29
11.15
10.97
10.76
10.49
10.17
9.80
21.92
18.30
14.57
10.68
6.80
2.90
−1.06
−5.17
−26.72
-26.63
-26.55
−33.83
−36.64
−39.62
−42.70
−45.95
−49.25
−52.65
−56.16
−59.84
−63.64
−67.63
−71.77
−76.13
−80.76
−85.61
−90.69
−95.96
−101.50
−107.30
−113.32
−119.45
−125.70
−132.04
−138.45
−144.79
−151.12
−157.36
−163.69
−170.01
−176.34
177.21
−8.18
−8.27
−8.37
−8.45
−8.44
−8.39
−8.33
−8.15
−7.90
−7.63
−7.31
−6.88
−6.44
−6.00
−5.53
−5.03
−4.56
−4.08
−3.61
−3.19
−2.80
−2.43
−2.13
−1.89
−1.66
−1.48
−1.37
−1.27
−1.19
−1.14
−1.12
−1.10
−1.09
−166.39
−169.02
−171.83
−175.32
−179.11
177.31
173.43
169.22
165.46
161.87
158.01
154.58
151.64
148.53
145.65
143.14
140.74
138.36
136.16
133.97
131.77
129.85
128.08
126.22
124.51
123.23
122.16
121.07
120.25
119.79
119.31
118.94
118.86
−26.48
−26.42
−26.37
−26.34
−26.31
−26.30
−26.30
−26.31
−26.34
−26.37
−26.44
−26.55
−26.68
−26.85
−27.06
−27.32
−27.65
−28.05
−28.49
−29.00
−29.58
−30.20
−30.88
−31.57
−32.29
−33.02
−33.74
−34.44
−35.12
−35.74
−9.36
−13.64
−18.05
−22.58
−27.18
−31.98
−36.95
−42.09
−47.34
−52.74
−58.29
−63.95
−69.56
−75.16
−80.70
−86.04
−91.20
−96.07
−100.64
−104.97
−108.96
−112.61
−116.07
−119.27
−122.18
9.39
8.92
8.39
7.83
7.26
6.66
6.04
5.43
4.82
4.20
3.60
170.60
163.89
Rev. C | Page 4 of 16
Data Sheet
ADL5321
ABSOLUTE MAXIMUM RATINGS
Table 3.
THERMAL RESISTANCE
Table 4 lists the junction-to-air thermal resistance (θJA) and the
junction-to-paddle thermal resistance (θJC) for the ADL5321.
Parameter
Rating
Supply Voltage, VCC
6.5 V
Input Power, 50 Ω Impedance
Internal Power Dissipation, Paddle Soldered
θJC, Junction to Paddle
Maximum Junction Temperature
Operating Temperature Range
Storage Temperature Range
20 dBm
683 mW
28.5°C/W
150°C
−40°C to +105°C
−65°C to +150°C
Table 4. Thermal Resistance
Package Type
1
2
θJA
θJC
Unit
3-Lead SOT-89
35
11
°C/W
1 Measured on Analog Devices evaluation board. For more information about
board layout, see the Soldering Information and Recommended PCB Land
Pattern section.
2 Based on simulation with JEDEC standard JESD51.
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
ESD CAUTION
Rev. C | Page 5 of 16
ADL5321
Data Sheet
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
RFIN
1
2
3
ADL5321
TOP VIEW
(Not to Scale)
GND
(2)
GND
RFOUT
Figure 3. Pin Configuration
Table 5. Pin Function Descriptions
Pin No.
Mnemonic
Description
1
2
3
RFIN
GND
RFOUT
RF Input. This pin requires a dc blocking capacitor.
Ground. Connect this pin to a low impedance ground plane.
RF Output and Supply Voltage. DC bias is provided to this pin through an inductor that is connected
to the external power supply. RF path requires a dc blocking capacitor.
Exposed Paddle
Expose Paddle. Internally connected to GND. Solder to a low impedance ground plane.
Rev. C | Page 6 of 16
Data Sheet
ADL5321
TYPICAL PERFORMANCE CHARACTERISTICS
42
41
40
39
38
37
36
35
34
30
29
45
OIP3 (5dBm)
OIP3 (–40°C)
40
35
OIP3 (+25°C)
OIP3 (+85°C)
28
27
26
25
24
30
P1dB
25
P1dB (–40°C)
20
GAIN
15
10
5
P1dB (+85°C)
P1dB (+25°C)
NOISE FIGURE
0
2.500 2.525 2.550 2.575 2.600 2.625 2.650 2.675 2.700
2.500 2.525 2.550 2.575 2.600 2.625 2.650 2.675 2.700
FREQUENCY (GHz)
FREQUENCY (GHz)
Figure 4. Gain, P1dB, OIP3, and Noise Figure vs. Frequency,
2.5 GHz to 2.7 GHz
Figure 7. OIP3 and P1dB vs. Frequency and Temperature,
2.5 GHz to 2.7 GHz
46
44
42
16.0
15.5
15.0
14.5
14.0
13.5
13.0
12.5
12.0
11.5
–40°C
2.6GHz
40
+25°C
38
2.5GHz
+85°C
36
34
2.7GHz
32
30
–4 –2
0
2
4
6
8
10 12 14 16 18 20 22
(dBm)
2.500 2.525 2.550 2.575 2.600 2.625 2.650 2.675 2.700
P
FREQUENCY (GHz)
OUT
Figure 5. Gain vs. Frequency and Temperature, 2.5 GHz to 2.7 GHz
Figure 8. OIP3 vs. POUT and Frequency, 2.5 GHz to 2.7 GHz
–24.0
–24.2
–24.4
–24.6
–24.8
–25.0
–25.2
–25.4
–25.6
–25.8
–26.0
0
6.0
–2
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
S12
–4
+85°C
+25°C
–6
–8
S11
–10
–12
–14
–16
–40°C
S22
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
FREQUENCY (GHz)
FREQUENCY (GHz)
Figure 9. Noise Figure vs. Frequency and Temperature, 2.2 GHz to 2.9 GHz
Figure 6. Reverse Isolation (S12), Input Return Loss (S11), and
Output Return Loss (S22) vs. Frequency, 2.2 GHz to 2.9 GHz
Rev. C | Page 7 of 16
ADL5321
Data Sheet
42
41
40
39
38
37
36
35
34
33
32
30
29
28
27
26
25
24
45
40
35
30
25
20
15
10
5
OIP3 (5dBm)
OIP3 (–40°C)
OIP3 (+25°C)
P1dB
OIP3 (+85°C)
P1dB (–40°C)
GAIN
P1dB (+25°C)
P1dB (+85°C)
NOISE FIGURE
0
3.400 3.425 3.450 3.475 3.500 3.525 3.550 3.575 3.600
FREQUENCY (MHz)
3.400 3.425 3.450 3.475 3.500 3.525 3.550 3.575 3.600
FREQUENCY (GHz)
Figure 10. Gain, P1dB, OIP3, and Noise Figure vs. Frequency,
3.4 GHz to 3.6 GHz
Figure 13. OIP3 and P1dB vs. Frequency and Temperature,
3.4 GHz to 3.6 GHz
14.0
13.5
42
3.4GHz
40
13.0
–40°C
38
12.5
3.5GHz
+25°C
12.0
36
3.6GHz
11.5
34
+85°C
11.0
10.5
32
30
10.0
3.400 3.425 3.450 3.475 3.500 3.525 3.550 3.575 3.600
–4 –2
0
2
4
6
8
10 12 14 16 18 20 22
(dBm)
FREQUENCY (GHz)
P
OUT
Figure 11. Gain vs. Frequency and Temperature, 3.4 GHz to 3.6 GHz
Figure 14. OIP3 vs. POUT and Frequency, 3.4 GHz to 3.6 GHz
–25
–26
–27
–28
–29
–30
–31
–32
–33
–34
–35
0
8.5
8.0
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
S12
S11
S22
–5
–10
–15
–20
–25
–30
+85°C
+25°C
–40°C
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4.0
FREQUENCY (MHz)
FREQUENCY (GHz)
Figure 12. Reverse Isolation (S12), Input Return Loss (S11), and
Output Return Loss (S22) vs. Frequency, 3.2 GHz to 4.0 GHz
Figure 15. Noise Figure vs. Frequency and Temperature,
3.2 GHz to 4.0 GHz
Rev. C | Page 8 of 16
Data Sheet
ADL5321
30
25
20
15
10
5
30
25
20
15
10
5
0
0
3.76 3.80 3.84 3.88 3.92 3.96 4.00 4.04 4.08 4.12 4.16
OIP3 (dBM)
NF (dB)
Figure 16. OIP3 Distribution at 2.6 GHz
Figure 19. Noise Figure (NF) Distribution at 2.6 GHz
35
30
25
20
15
10
5
110
105
100
95
5.25V
90
5.0V
85
4.75V
80
75
0
70
–40 –30 –20 –10
0
10 20 30 40 50 60 70 80
P1dB (dBM)
TEMPERATURE (°C)
Figure 17. P1dB Distribution at 2.6 GHz
Figure 20. Supply Current vs. Temperature and Supply Voltage
(Using 2.6 GHz Matching Components)
220
200
180
160
140
120
35
30
25
20
15
10
5
100
5V
80
60
3.3V
40
20
0
–6 –4 –2
0
2
4
6
8
10 12 14 16 18 20 22 24 26 28
(dBm)
P
OUT
GAIN (dB)
Figure 21. Supply Current vs. POUT 3.3 V and 5 V
(2.6 GHz Matching Components)
Figure 18. Gain Distribution at 2.6 GHz
Rev. C | Page 9 of 16
ADL5321
Data Sheet
HIGH TEMPERATURE AND 3.3 V OPERATION
The ADL5321 has excellent performance at temperatures above 85°C. At 105°C, the gain and P1dB decrease by 0.2 dB, the OIP3 decreases by
0.1 dB, and the noise figure increases by 0.31 dB compared with the data at 85°C. Figure 25 through Figure 27 show the performance at 105°C.
16.0
15.0
14.5
14.0
13.5
13.0
12.5
12.0
11.5
11.0
10.5
15.5
25°C
85°C
105°C
15.0
14.5
14.0
13.5
13.0
12.5
12.0
11.5
–40°C
25°C
85°C
105°C
10.0
2.500 2.525 2.550 2.575 2.600 2.625 2.650 2.675 2.700
2.500 2.525 2.555 2.575 2.600 2.625 2.650 2.675 2.700
FREQUENCY (GHz)
FREQUENCY (GHz)
Figure 25. Gain vs. Frequency and Temperature, 3.3 V Supply, 2.5 GHz to 2.7 GHz
Figure 22. Gain vs. Frequency and Temperature, 5 V Supply, 2.5 GHz to 2.7 GHz
33
32
27
26
42
41
40
39
38
37
36
35
32
31
30
29
28
27
26
25
OIP3 (+105°C)
25°C
85°C
105°C
OIP3 (+85°C)
OIP3
31
30
29
28
27
26
25
24
23
22
21
20
OIP3 (–40°C)
P1dB (25°C)
OIP3 (+25°C)
P1dB (–40°C)
P1dB
P1dB (+85°C)
P1dB (+105°C)
34
24
2.500 2.525 2.550 2.575 2.600 2.625 2.650 2.675 2.700
2.500 2.525 2.555 2.575 2.600 2.625 2.650 2.675 2.700
FREQUENCY (GHz)
FREQUENCY (GHz)
Figure 26. OIP3 and P1dB vs. Frequency and Temperature,
3.3 V Supply, 2.5 GHz to 2.7 GHz
Figure 23. OIP3 and P1dB vs. Frequency and Temperature,
5 V Supply, 2.5 GHz to 2.7 GHz
7
6
5
5.5
5.0
4.5
4.0
105°C
85°C
25°C
–40°C
4
3
2
1
3.5
25°C
85°C
105°C
3.0
2.50
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.55
2.60
2.65
2.70
FREQUENCY (GHz)
FREQUENCY (GHz)
Figure 24. Noise Figure vs. Frequency and Temperature,
5 V Supply, 2.5 GHz to 2.7 GHz
Figure 27. Noise Figure vs. Frequency and Temperature,
3.3 V Supply 2.5 GHz to 2.7 GHz
Rev. C | Page 10 of 16
Data Sheet
ADL5321
BASIC LAYOUT CONNECTIONS
The basic connections for operating the ADL5321 are shown
in Figure 28.
SOLDERING INFORMATION AND RECOMMENDED
PCB LAND PATTERN
Table 6 lists the required matching components. Capacitors
C1, C2, C3, C4, and C7 are Murata GRM155 series (0402 size)
and Inductor L1 is a Coilcraft 0603CS series (0603 size). For all
frequency bands, the placement of C3 and C7 is critical. From
2500 MHz to 2700 MHz, the placement of C1 is also important.
Table 7 lists the recommended component placement for
various frequencies.
Figure 29 shows the recommended land pattern for the ADL5321.
To minimize thermal impedance, the exposed paddle on the
SOT-89 package underside is soldered down to a ground plane
along with (GND) Pin 2. If multiple ground layers exist, they
should be stitched together using vias. For more information on
land pattern design and layout, refer to the AN-772 Application
Note, A Design and Manufacturing Guide for the Lead Frame
Chip Scale Package (LFCSP).
A 5 V dc bias is supplied through L1 that is connected to RFOUT
(Pin 3). In addition to C4, 10 nF and 10 μF power supply
decoupling capacitors are also required. The typical current
consumption for the ADL5321 is 90 mA.
This land pattern, on the ADL5321 evaluation board, provides
a measured thermal resistance (θJA) of 35°C/W. To measure θJA,
the temperature at the top of the SOT-89 package is found with
an IR temperature gun. Thermal simulation suggests a junction
temperature 10°C higher than the top of package temperature.
With additional ambient temperature and I/O power measure-
ments, θJA could be determined.
VCC
GND
C6 10µF
C5 10nF
(2)
1.80mm
1
C4
ADL5321
1
L1
1
1
C2
2
4
1
2
3
RF
RF
C1
2
2
2
IN
2
1
OUT
λ
3
λ
λ
λ
1
1
C7
C3
3.48mm
1
SEE TABLE 5 FOR FREQUENCY SPECIFIC COMPONENTS.
SEE TABLE 6 FOR RECOMMENDED COMPONENT SPACING.
0.20mm
5.56mm
2
Figure 28. Basic Connections
0.86mm
0.62mm
1.27mm
1.50mm
3.00mm
Figure 29. Recommended Land Pattern
Table 6. Recommended Components for Basic Connections
Frequency (MHz)
C1 (pF)
C2 (pF)
C3 (pF)
1.2
1.2
C4 (pF)
10
10
C7 (pF)
Open
1.0
L1 (nH)
9.5
9.5
2500 to 2700
3400 to 3850
1.0
10
10
10
Table 7. Matching Component Spacing
Frequency (MHz)
λ1 (mils)
λ2 (mils)
λ3 (mils)
λ4 (mils)
2500 to 2700
3400 to 3850
240
90
75
35
89
40
325
416
Rev. C | Page 11 of 16
ADL5321
Data Sheet
FIXED LOAD PULL
FREQ = 2.6000 GHz
LOAD
MATCHING PROCEDURE
IP3
MAX = 41.70dBm
The ADL5321 is designed to achieve excellent gain and IP3
performance. To achieve this, both input and output matching
networks must present specific impedance to the device. The
matching components listed in Table 6 were chosen to provide
−14 dB input return loss while maximizing OIP3. The load-pull
plots (see Figure 30, Figure 31, and Figure 32) show the load
impedance points on the Smith chart where optimum OIP3,
gain, and output power can be achieved. These load impedance
values (that is, the impedance that the device sees when looking
into the output matching network) are listed in Table 8 and Table 9
for maximum gain and maximum OIP3, respectively. The contours
show how each parameter degrades as it is moved away from
the optimum point.
AT 0.4705< 86.63
10 CONTOURS, 1.00dBm STEP
(32.00 TO 41.00dBm)
POUT MAX = 14.16dBm
AT 0.6100< 136.24
10 CONTOURS, 1.00dBm STEP
(5.00 TO 14.00dBm)
GT
MAX = 15.02dBm
AT 0.6100< 136.24
10 CONTOURS, 1.00dBm STEP
(6.00 TO 15.00dB)
SPECS: OFF
0.404< 93.05
Figure 30. Load-Pull Contours, 2600 MHz
From the data shown in Table 8 and Table 9, it becomes clear that
maximum gain and maximum OIP3 do not occur at the same
impedance. This can also be seen on the load-pull contours in
Figure 30 through Figure 32. Therefore, output matching generally
involves compromising between gain and OIP3. In addition, the
load-pull plots demonstrate that the quality of the output
impedance match must be compromised to optimize gain and/
or OIP3. In most applications where line lengths are short and
where the next device in the signal chain presents a low input
return loss, compromising on the output match is acceptable.
FIXED LOAD PULL
FREQ = 3.5000 GHz
LOAD
IP3
MAX = 41.37dBm
AT 0.6911< 142.11
10 CONTOURS, 1.00dBm STEP
(32.00 TO 41.00dBm)
POUT MAX = 14.96dBm
AT 0.7686< 162.58
10 CONTOURS, 1.00dBm STEP
(5.00 TO 14.00dBm)
GT
MAX = 14.02dBm
AT 0.7686< 162.58
10 CONTOURS, 1.00dBm STEP
(5.00 TO 14.00dB)
SPECS: OFF
To adjust the output match for operation at a different frequency or
if a different trade-off between OIP3, gain, and output impedance
is desired, the following procedure is recommended.
0.875< –147.48
Figure 31. Load-Pull Contours, 3500 MHz
For example, to optimize the ADL5321 for optimum OIP3 and
gain at 2300 MHz, use the following steps:
FIXED LOAD PULL
FREQ = 3.6000 GHz
LOAD
1. Install the recommended tuning components for a 2500 MHz
to 2700 MHz tuning band, but do not install C3 and C7.
IP3
MAX = 41.29dBm
AT 0.7070< 140.65
10 CONTOURS, 1.00dBm STEP
(32.00 TO 41.00dBm)
2. Connect the evaluation board to a vector network analyzer
so that input and output return loss can be viewed simulta-
neously.
POUT MAX = 15.63dBm
AT 0.7057< 161.81
10 CONTOURS, 1.00dBm STEP
(6.00 TO 15.00dBm)
3. Starting with the recommended values and positions for
C3 and C7, adjust the positions of these capacitors along
the transmission line until the return loss and gain are
acceptable. Push-down capacitors that are mounted on
small sticks can be used in this case as an alternative to
soldering. If moving the component positions does not
yield satisfactory results, then the values of C3 and C7
should be increased or decreased (most likely increased
in this case because the user is tuning for a lower frequency).
Repeat the process.
GT
MAX = 13.44dBm
AT 0.7057< 161.81
10 CONTOURS, 1.00dBm STEP
(4.00 TO 13.00dB)
SPECS: OFF
Figure 32. Load-Pull Contours, 3600 MHz
4. Once the desired gain and return loss are realized, OIP3
should be measured. It may be necessary to go back and
forth between return loss/gain and OIP3 measurements
(probably compromising most on output return loss) until
an acceptable compromise is achieved.
Rev. C | Page 12 of 16
Data Sheet
ADL5321
–30
–40
–50
–60
–70
–80
–90
Table 8. Load Conditions for GainMAX
ADJ CH LOW 2.6 GHZ
ALT CH LOW 2.6 GHZ
ADJ CH LOW 3.5 GHZ
ALT CH UP 3.5 GHZ
ΓLoad
Frequency (MHz)
(Magnitude) ΓLoad (°) Gain MAX (dB)
2600
3500
3600
0.6100
0.7686
0.7057
136.24
162.58
161.81
15.02
14.02
13.44
Table 9. Load Conditions for OIP3MAX
ΓLoad
Frequency (MHz) (Magnitude) ΓLoad (°) IP3 MAX (dBm)
2600
3500
3600
0.4705
0.6911
0.7070
86.63
142.11
140.65
41.7
41.37
41.29
–10
–5
0
5
10
15
20
P
(dBm)
OUT
Figure 33. ACLR vs. POUT, WiMAX 64 QAM, 10 MHz Bandwidth, Single Carrier
WiMAX OPERATION
Figure 33 shows a plot of adjacent channel leakage ratio (ACLR)
vs. POUT for the ADL5321. The signal type used is a WiMAX,
64 QAM, single carrier with a 10 MHz channel bandwidth. This
signal is generated by a WiMAX-enabled source and followed
with suitable band-pass filtering. The band-pass filter helps reduce
the adjacent and alternate channel noise and distortion out of
the signal generator down to −63 dB in the adjacent channels
and −76 dB in the alternate channels at 2.6 GHz and −60 dB
at 3.5 GHz.
0
–5
–10
–15
–20
–25
–30
3.5 GHz
2.6 GHz
–35
Below an output power of 7 dBm, measured ADL5321 output
spectral performance is limited by the signal quality from the
signal source used (−63 dB at 2.6 GHz and −60 dB at 3.5 GHz).
At high power operation, input power to the ADL5321 is 1 dBm
for 15 dBm output power and the source ACLR is −60.2 dB. It
is expected that with a better signal source, the ADL5321 output
spectral quality improves further, especially at output power
levels ≤10 dBm. For instance, the ADL5373 quadrature modulator
measured ACLR is −69 dB for an output power of −10 dBm.
–40
–45
–50
–20
–15
–10
–5
0
5
10
15
20
P
(dBm)
OUT
Figure 34. RCE/EVM vs. POUT, WiMAX 64 QAM, 10 MHz Bandwidth, Single Carrier
For output powers up to 10 dBm rms, the ADL5321 adds very
little distortion to the output spectrum. At 2.6 GHz, the ACLR is
−59 dB and a relative constellation error of −46.6 dB (<0.5% EVM)
at an output power of 10 dBm rms.
Rev. C | Page 13 of 16
ADL5321
Data Sheet
EVALUATION BOARD
The schematic of the ADL5321 evaluation board is shown in
Figure 35. This evaluation board uses 25 mil wide traces and is
made from IS410 material (lead-free version of FR4). The
evaluation board comes tuned for operation in the 2500 MHz to
2700 MHz tuning band. Tuning options for other frequency bands
are also provided in Table 10. The recommended placement for
these components is provided in Table 11. The inputs and outputs
should be ac-coupled with appropriately sized capacitors. DC
bias is provided to the amplifier via an inductor connected to
the RFOUT pin. A bias voltage of 5 V is recommended.
GND VCC
C6 10µF
C5 10nF
C4 10pF
(2)
ADL5321
L1
9.5nH
C2
10pF
C1
1.0pF
1
2
3
RF
RF
IN
OUT
λ
3
λ4
λ
2
λ
1
C7
C3
OPEN
1.2pF
Figure 35. Evaluation Board, 2500 MHz to 2700 MHz
Table 10. Evaluation Board Configuration Options
Component
Function
2500 MHz to 2700 MHz
C1 = 0402, 1.0 pF
C2 = 0402, 10 pF
C4 = 0603, 10 pF
C5 = 0603, 10 nF
C6 = 1206, 10 µF
0603, 9.5 nH
3400 MHz to 3850 MHz
C1 = 0402, 10 pF
C2 = 0402, 10 pF
C4 = 0603, 10 pF
C5 = 0603, 10 nF
C6 = 1206, 10 µF
0603, 9.5 nH
C1, C2
AC coupling capacitors
C4, C5, C6
Power supply bypassing capacitors
L1
DC bias inductor
Tuning capacitors
C3, C7
C3 = 0402, 1.2 pF
C7 = 0402, open
VCC, red test loop
GND, black test loop
C3 = 0402, 1.2 pF
C7 = 0402, 1.0 pF
VCC, red test loop
GND, black test loop
VCC, GND
Power supply connections
Table 11. Recommended Component Spacing on Evaluation Board
Frequency (MHz)
λ1 (mils)
λ2 (mils)
λ3 (mils)
λ4 (mils)
325
416
2500 to 2700
3400 to 3850
240
90
75
35
89
40
Rev. C | Page 14 of 16
Data Sheet
ADL5321
10µF
10µF
10 nF
10 pF
10 nF
10 pF
(2)
(2)
C2
10 pF
C1
1.0 pF
C2
10pF
C1
10 pF
9.5 nH
9.5 nH
C3
1
2
3
1
2
3
C3
1.2 pF
C7
1.2 pF
Figure 37. Evaluation Board Layout and Component Placement for
Operation from 3400 MHz to 3850 MHz
Figure 36. Evaluation Board Layout and Default Component Placement for
Operation from 2500 MHz to 2700 MHz (Note: C7 Is Not Placed)
Rev. C | Page 15 of 16
ADL5321
Data Sheet
OUTLINE DIMENSIONS
*
1.75
1.55
(2)
2
4.25
3.94
2.60
2.30
1
3
1.20
1.50 TYP
0.75
3.00 TYP
2.29
2.14
4.60
4.40
1.60
1.40
0.44
0.35
END VIEW
*
0.56
0.36
*
0.52
0.32
*
COMPLIANT TO JEDEC STANDARDS TO-243 WITH THE
EXCEPTION OF DIMENSIONS INDICATED BY AN ASTERISK.
Figure 38. 3-Lead Small Outline Transistor Package [SOT-89]
(RK-3)
Dimensions shown in millimeters
ORDERING GUIDE
Model1
Temperature Range
−40°C to +105°C
Package Description
Package Option
RK-3
ADL5321ARKZ-R7
ADL5321-EVALZ
3-Lead SOT-89, 7“ Tape and Reel
Evaluation Board
1 Z = RoHS Compliant Part.
©2008–2012 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D07307-0-7/12(C)
Rev. C | Page 16 of 16
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