400 MHz to 2700 MHz RF Driver Amplifier ADL5320

400 MHz to 2700 MHz
RF Driver Amplifier
ADL5320
FUNCTIONAL BLOCK DIAGRAM
Operation: 400 MHz to 2700 MHz
Gain of 17 dB at 880 MHz
OIP3 of 45 dBm at 880 MHz
P1dB of 25.4 dBm at 880 MHz
Noise figure: 4 dB at 880 MHz
Power supply: 5 V
Power supply current: 104 mA typical
Internal active biasing
Thermally efficient SOT-89 package
ESD rating of ±4 kV (Class 3A)
GND
(2)
ADL5320
BIAS
1
2
3
RFIN
GND
RFOUT
05840-001
FEATURES
Figure 1.
GENERAL DESCRIPTION
The ADL5320 is a broadband, linear driver RF amplifier that
operates at frequencies from 400 MHz to 2700 MHz. The device
can be used in a wide variety of wired and wireless applications,
including ISM, WLL, PCS, GSM, CDMA, and W-CDMA.
The ADL5320 is fabricated on a GaAs HBT process. The device
is packaged in a low cost SOT-89 that uses an exposed paddle
for excellent thermal impedance. It operates from −40°C to
+85°C, and a fully populated evaluation board is available.
The ADL5320 operates with a 5 V supply voltage and a supply
current of 104 mA.
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Rev. 0
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
rights of third parties that may result from its 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 and registered trademarks 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 Analog Devices, Inc. All rights reserved.
ADL5320
TABLE OF CONTENTS
Features .............................................................................................. 1
Typical Performance Characteristics ..............................................7
Functional Block Diagram .............................................................. 1
Basic Layout Connections ............................................................. 11
General Description ......................................................................... 1
Revision History ............................................................................... 2
Soldering Information and Recommended PCB Land
Pattern .......................................................................................... 11
Specifications..................................................................................... 3
Matching Procedure................................................................... 12
Typical Scattering Parameters ..................................................... 4
W-CDMA ACPR Performance ................................................ 13
Absolute Maximum Ratings............................................................ 5
Evaluation Board ............................................................................ 14
ESD Caution .................................................................................. 5
Outline Dimensions ....................................................................... 16
Pin Configuration and Function Descriptions ............................. 6
Ordering Guide .......................................................................... 16
REVISION HISTORY
2/08—Revision 0: Initial Version
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Rev. 0 | Page 2 of 16
ADL5320
SPECIFICATIONS
VSUP = 5 V and TA = 25°C, unless otherwise noted.
Table 1.
Parameter
OVERALL FUNCTION
Frequency Range
FREQUENCY = 880 MHz
Gain 1
vs. Frequency
vs. Temperature
vs. Supply
Output 1 dB Compression Point
Output Third-Order Intercept
Noise Figure
FREQUENCY = 2140 MHz
Gain1
vs. Frequency
vs. Temperature
vs. Supply
Output 1 dB Compression Point
Output Third-Order Intercept
Noise Figure
FREQUENCY = 2600 MHz
Gain1
vs. Frequency
vs. Temperature
vs. Supply
Output 1 dB Compression Point
Output Third-Order Intercept
Noise Figure
POWER INTERFACE
Supply Voltage
Supply Current
vs. Temperature
Power Dissipation
Conditions
Min
400
Max
Unit
2700
MHz
16.3
16.9
±0.3
±0.6
±0.1
25.4
45
4.1
17.5
dB
dB
dB
dB
dBm
dBm
dB
12.4
13.2
±0.33
±0.8
±0.06
25.7
42
4.4
14.0
dB
dB
dB
dB
dBm
dBm
dB
11.5
12.5
±0.6
±1.1
±0.1
27.4
37
5.1
13.4
dB
dB
dB
dB
dBm
dBm
dB
4.5
5
104
±6.0
520
5.5
124
V
mA
mA
mW
±50 MHz
−40°C ≤ TA ≤ +85°C
4.75 V to 5.25 V
∆f = 1 MHz, POUT = 10 dBm per tone
±50 MHz
−40°C ≤ TA ≤ +85°C
4.75 V to 5.25 V
∆f = 1 MHz, POUT = 10 dBm per tone
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1
Typ
±100 MHz
−40°C ≤ TA ≤ +85°C
4.75 V to 5.25 V
∆f = 1 MHz, POUT = 10 dBm per tone
Pin RFOUT
−40°C ≤ TA ≤ +85°C
VSUP = 5 V
Guaranteed maximum and minimum specified limits on this parameter are based on 6 sigma calculations.
Rev. 0 | Page 3 of 16
ADL5320
TYPICAL SCATTERING PARAMETERS
VSUP = 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.
Freq (MHz)
400
500
550
600
650
700
750
800
850
900
950
1000
1050
1100
1150
1200
1250
1300
1350
1400
1450
1500
1550
1600
1650
1700
1750
1800
1850
1900
1950
2000
2050
2100
2150
2200
2250
2300
2350
2400
2450
2500
2550
2600
2650
2700
S11
Magnitude (dB)
−1.51
−1.38
−1.42
−1.46
−1.46
−1.50
−1.56
−1.61
−1.66
−1.72
−1.85
−1.92
−2.02
−2.20
−2.41
−2.62
−2.87
−3.16
−3.65
−4.09
−4.59
−5.28
−6.09
−6.98
−8.06
−9.38
−11.15
−13.20
−15.83
−19.87
−24.51
−22.66
−18.02
−14.34
−12.10
−10.23
−8.65
−7.90
−6.66
−6.35
−5.77
−5.51
−5.35
−5.15
−5.22
−5.06
Angle (°)
164.18
155.33
151.34
147.66
144.12
140.66
137.19
133.97
130.74
127.65
124.15
120.90
117.54
114.21
110.72
107.22
103.77
99.97
96.51
92.23
88.76
84.62
80.71
77.02
72.69
68.92
66.21
63.18
63.73
71.29
103.69
156.61
171.65
174.52
172.15
166.81
160.58
153.80
145.88
138.01
128.87
118.44
112.21
99.40
92.84
82.21
S21
Magnitude (dB)
14.18
14.03
13.79
13.72
13.53
13.45
13.21
13.29
13.04
13.03
12.92
12.93
12.92
12.76
12.97
12.69
12.98
12.87
12.94
12.87
13.04
13.00
12.89
13.13
13.07
13.00
12.97
13.18
13.03
12.84
13.08
12.86
12.88
12.63
12.45
12.65
11.82
11.84
11.55
10.97
10.36
9.65
9.46
7.99
7.70
6.61
Angle (°)
+128.37
+118.16
+112.76
+108.71
+104.05
+98.89
+95.44
+90.33
+86.67
+81.59
+77.91
+73.13
+68.80
+64.12
+59.95
+54.62
+50.95
+44.96
+40.47
+35.36
+30.47
+24.40
+19.39
+14.80
+7.27
+2.17
−3.27
−9.57
−17.27
−22.35
−29.10
−36.58
−43.14
−51.83
−55.83
−67.28
−73.99
−79.82
−91.28
−96.39
−108.43
−110.92
−122.10
−130.39
−132.72
−143.64
S12
Magnitude (dB)
−32.37
−31.75
−31.68
−31.46
−31.56
−31.13
−31.12
−31.00
−30.60
−30.72
−30.31
−30.22
−29.98
−29.80
−29.39
−29.46
−29.03
−28.75
−28.81
−28.26
−28.43
−28.13
−27.96
−27.98
−27.73
−27.49
−27.78
−27.23
−27.36
−27.40
−27.26
−27.33
−27.33
−27.54
−27.77
−27.74
−28.34
−28.62
−28.92
−29.75
−30.13
−30.41
−32.29
−31.60
−33.19
−33.61
Angle (°)
+6.77
+1.48
−3.93
−4.60
−6.81
−9.87
−11.14
−13.96
−14.90
−17.78
−20.23
−22.21
−24.19
−28.18
−29.56
−33.00
−37.13
−38.18
−44.64
−46.78
−49.56
−56.47
−59.31
−62.71
−69.93
−73.80
−77.79
−85.28
−89.22
−96.30
−102.96
−109.25
−117.37
−124.60
−132.56
−141.32
−149.30
−161.50
−165.89
+179.97
+170.82
+163.00
+152.20
+138.60
+135.12
+120.22
S22
Magnitude (dB)
−3.44
−3.70
−3.79
−3.83
−3.90
−3.99
−4.02
−4.07
−4.12
−4.21
−4.25
−4.27
−4.32
−4.37
−4.43
−4.42
−4.47
−4.44
−4.45
−4.40
−4.37
−4.29
−4.20
−4.05
−3.88
−3.71
−3.59
−3.29
−3.11
−2.93
−2.69
−2.54
−2.50
−2.35
−2.44
−2.42
−2.43
−2.74
−2.62
−2.94
−3.03
−3.24
−3.41
−3.55
−3.80
−3.93
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Rev. 0 | Page 4 of 16
Angle (°)
160.94
156.73
154.66
152.89
151.08
149.38
147.87
146.36
144.94
143.60
142.41
141.31
140.51
139.63
138.68
138.09
137.74
137.08
136.77
136.49
136.43
135.79
135.63
135.39
134.43
133.76
132.94
131.04
129.62
127.46
124.63
122.53
118.78
115.97
112.52
108.19
104.65
100.98
96.52
92.52
88.07
83.25
79.98
73.08
69.85
63.87
ADL5320
ABSOLUTE MAXIMUM RATINGS
Table 3.
Parameter
Supply Voltage, VSUP
Input Power (50 Ω Impedance)
Internal Power Dissipation (Paddle Soldered)
θJC (Junction to Paddle)
Maximum Junction Temperature
Operating Temperature Range
Storage Temperature Range
Rating
6.5 V
20 dBm
683 mW
28.5°C/W
150°C
−40°C to +85°C
−65°C to +150°C
ESD CAUTION
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.
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Rev. 0 | Page 5 of 16
ADL5320
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
RFIN 1
ADL5320
TOP VIEW
(2) GND
(Not to Scale)
RFOUT 3
05840-002
GND 2
Figure 2. Pin Configuration
Table 4. Pin Function Descriptions
Pin No.
1
2
3
Exposed Paddle
Mnemonic
RFIN
GND
RFOUT
Description
RF Input. Requires a dc blocking capacitor.
Ground. Connect 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.
Expose Paddle. Internally connected to GND. Solder to a low impedance ground plane.
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Rev. 0 | Page 6 of 16
ADL5320
TYPICAL PERFORMANCE CHARACTERISTICS
50
50
OIP3 (–40°C)
35
OIP3 (+85°C)
40
OIP3 (dBm)
30
P1dB
20
15
35
27
30
GAIN
26
P1dB (–40°C)
10
P1dB (+85°C)
25
820
840
05840-003
NF
5
860
880
900
FREQUENCY (MHz)
920
940
20
800
960
820
840
860
880
900
FREQUENCY (MHz)
920
940
24
960
Figure 6. OIP3 and P1dB vs. Frequency and Temperature,
800 MHz to 960 MHz
19.0
50
930MHz
18.5
18.0
880MHz
46
–40°C
17.5
+25°C
17.0
OIP3 (dBm)
+85°C
16.5
42
960MHz
850MHz
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16.0
15.5
15.0
830MHz
38
05840-004
34
14.5
820
840
860
880
900
FREQUENCY (MHz)
920
940
30
–2
960
05870-007
GAIN (dB)
25
P1dB (+25°C)
Figure 3. Gain, P1dB, OIP3, and Noise Figure vs. Frequency,
800 MHz to 960 MHz
0
2
4
6
8
10
12
14
16
18
20
22
POUT (dBm)
Figure 4. Gain vs. Frequency and Temperature, 800 MHz to 960 MHz
Figure 7. OIP3 vs. POUT and Frequency, 800 MHz to 960 MHz
–25.0
7.0
0
6.0
–10
–26.5
–15
–27.0
–20
S12
–27.5
–25
S11
–28.5
800
850
900
FREQUENCY (MHz)
950
4.5
+25°C
3.5
–30
–40°C
3.0
–35
750
+85°C
5.0
4.0
2.5
05840-005
–29.0
700
5.5
NF (dB)
–26.0
–28.0
6.5
–5
S22
S11 (dB) AND S22 (dB)
–25.5
S12 (dB)
28
05840-006
25
14.0
800
29
OIP3 (+25°C)
P1dB (dBm)
45
40
–40
1000
Figure 5. Input Return Loss (S11), Output Return Loss (S22), and Reverse
Isolation (S12) vs. Frequency, 800 MHz to 960 MHz
2.0
700
750
800
850
900
FREQUENCY (MHz)
950
1000
05840-008
GAIN, NF (dB); P1dB, OIP3 (dBm)
45
0
800
30
OIP3 (10dBm)
Figure 8. Noise Figure vs. Frequency and Temperature, 800 MHz to 960 MHz
Rev. 0 | Page 7 of 16
ADL5320
28.0
41
30
OIP3 (dBM)
P1dB
25
20
15
GAIN
10
OIP3 (+85°C)
P1dB (–40°C)
2100
26.5
35
26.0
33
NF
2080
27.5
27.0
37
25.5
P1dB (+25°C)
31
5
OIP3 (+25°C)
39
2120
2140
2160
FREQUENCY (MHz)
2180
2200
2220
P1dB (dBm)
35
28.5
OIP3 (–40°C)
43
25.0
P1dB (+85°C)
29
2060
2080
2100
2120
2140
2160
FREQUENCY (MHz)
2180
2200
24.5
2220
Figure 9. Gain, P1dB, OIP3, and Noise Figure vs. Frequency,
2060 MHz to 2200 MHz
Figure 12. OIP3 and P1dB vs. Frequency and Temperature,
2060 MHz to 2200 MHz
16
43
15
41
05840-012
OIP3 (10dBm)
05840-009
GAIN, NF (dB); P1dB, OIP3 (dBm)
40
0
2060
29.0
45
45
2190MHz
2140MHz
2060MHz
2090MHz
–40°C
39
OIP3 (dBm)
+25°C
13
+85°C
35
12
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2080
2100
2120
2140
2160
FREQUENCY (MHz)
2180
2200
2220
31
–2
–23
10
12
14
16
18
20
22
–15
S11
–26
–20
S12
–25
–27
7.0
6.5
6.0
NF (dB)
–25
S12 (dB)
8
7.5
S11 (dB) AND S22 (dB)
–10
S22
–28
2250
+25°C
4.5
4.0
–40°C
2.5
05840-011
2200
5.0
3.0
–35
–40
2300
+85°C
5.5
3.5
–30
2050
2100 2150
FREQUENCY (MHz)
6
8.0
–5
–24
2000
4
Figure 13. OIP3 vs. POUT and Frequency, 2060 MHz to 2200 MHz
0
1950
2
POUT (dBm)
Figure 10. Gain vs. Frequency and Temperature, 2060 MHz to 2200 MHz
–29
1900
0
05870-013
05840-010
33
11
10
2060
2220MHz
37
Figure 11. Input Return Loss (S11), Output Return Loss (S22), and Reverse
Isolation (S12) vs. Frequency, 2060 MHz to 2200 MHz
Rev. 0 | Page 8 of 16
2.0
1900
1950
2000
2050
2100
2150
FREQUENCY (MHz)
2200
2250
Figure 14. Noise Figure vs. Frequency and Temperature,
2060 MHz to 2200 MHz
2300
05840-014
GAIN (dB)
14
ADL5320
39
OIP3 (–40°C)
31
37
OIP3 (+25°C)
35
OIP3 (dBm)
25
20
15
29
34
P1dB (–40°C)
28
33
P1dB (+25°C)
32
GAIN
10
27
31
5
30
OIP3 (+85°C)
36
P1dB
NF
0
2500 2520 2540 2560 2580 2600 2620 2640 2660 2680 2700
P1dB (+85°C)
26
30
29
2500
2550
2600
FREQUENCY (MHz)
FREQUENCY (MHz)
Figure 15. Gain, P1dB, OIP3, and Noise Figure vs. Frequency,
2500 MHz to 2700 MHz
P1dB (dBm)
30
05840-015
GAIN, NF (dB); P1dB, OIP3 (dBm)
38
OIP3 (10dBm)
35
32
05840-018
40
25
2700
2650
Figure 18. OIP3 and P1dB vs. Frequency and Temperature,
2500 MHz to 2700 MHz
15
46
44
14
–40°C
42
+25°C
40
12
OIP3 (dBm)
GAIN (dB)
13
+85°C
11
36
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34
10
2600MHz
2700MHz
38
2500MHz
2550
2600
FREQUENCY (MHz)
2650
2700
30
–3
Figure 16. Gain vs. Frequency and Temperature, 2500 MHz to 2700 MHz
–25.5
S11
–27.5
–20
S12
–28.0
–25
–28.5
15
17
19
21
23
+85°C
6.0
–30
–29.0
5.5
+25°C
5.0
4.5
–40°C
4.0
3.5
2500
2550
2600 2650
FREQUENCY (MHz)
2700
2750
2.5
05840-017
2450
–40
2800
Figure 17. Input Return Loss (S11), Output Return Loss (S22), and Reverse
Isolation (S12) vs. Frequency, 2500 MHz to 2700 MHz
Rev. 0 | Page 9 of 16
2.0
2400
2450
2500
2550
2600
2650
FREQUENCY (MHz)
2700
2750
2800
Figure 20. Noise Figure vs. Frequency and Temperature,
2500 MHz to 2700 MHz
05840-020
3.0
–35
–29.5
–30.0
2400
9 11 13
POUT (dBm)
6.5
NF (dB)
S12 (dB)
–15
–27.0
7
7.0
S11 (dB) AND S22 (dB)
S22
5
7.5
–26.0
–26.5
3
8.0
–5
–10
1
Figure 19. OIP3 vs. POUT and Frequency, 2500 MHz to 2700 MHz
0
–25.0
–1
05840-019
9
2500
05840-016
32
ADL5320
18
50
16
40
12
PERCENTAGE (%)
10
8
6
4
30
20
05840-021
0
42.0
42.8
43.6
44.4
45.2
46.0
46.8
0
47.6
05840-024
10
2
3.80
3.88
3.96
OIP3 (dBm)
Figure 21. OIP3 Distribution at 880 MHz
5.25V
SUPPLY CURRENT (mA)
PERCENTAGE (%)
4.28
115
40
30
20
110
105
5.0V
100
95
4.75V
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24.4
24.8
25.2
25.6
26.0
26.4
80
–40 –30 –20 –10
26.8
P1dB (dBm)
Figure 22. P1dB Distribution at 880 MHz
25
20
15
10
05840-023
5
16.75
16.85
16.95
17.05
17.15
0
10 20 30 40
TEMPERATURE (°C)
50
60
70
80
Figure 25. Supply Current vs. Supply Voltage and Temperature (Using
880 MHz Matching Components)
30
16.65
90
85
05840-022
10
PERCENTAGE (%)
4.20
120
50
0
4.12
Figure 24. Noise Figure Distribution at 880 MHz
60
0
4.04
NF (dB)
05840-025
PERCENTAGE (%)
14
17.25
GAIN (dB)
Figure 23. Gain Distribution at 880 MHz
Rev. 0 | Page 10 of 16
ADL5320
BASIC LAYOUT CONNECTIONS
The basic connections for operating the ADL5320 are shown in
Figure 26.
SOLDERING INFORMATION AND RECOMMENDED
PCB LAND PATTERN
Table 5 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 are critical. From
2300 MHz to 2700 MHz, the placement of C2 is also important.
Table 6 lists the recommended component placement for
various frequencies.
Figure 27 shows the recommended land pattern for the ADL5320.
To minimize thermal impedance, the exposed paddle on the
SOT-89 package underside is soldered down to a ground plane
along with 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 Application Note AN-772,
A Design and Manufacturing Guide for the Lead Frame Chip
Scale Package (LFCSP).
A 5 V dc bias is supplied through L1 which 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 ADL5320 is 110 mA.
GND
1.80mm
VSUP
(2)
GND
C6 10µF
3.48mm
C5 10nF
C41
5.56mm
0.20mm
ADL5320
1SEE
2SEE
2
3
λ22
λ32
1
λ42 C2
0.86mm
RFOUT
C71
0.62mm
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TABLE 5 FOR FREQUENCY SPECIFIC COMPONENTS.
TABLE 10 FOR RECOMMENDED COMPONENT SPACING.
1.27mm
05840-027
C31
1
05840-026
λ12
RFOUT
C11
GND
RFIN
RFIN
L11
1.50mm
Figure 26. Basic Connections
3.00mm
Figure 27. Recommended Land Pattern
Table 5. Recommended Components for Basic Connections
Frequency (MHz)
450 to 500
800 to 960
1805 to 1880
1930 to 1990
2110 to 2170
2300 to 2400
2500 to 2700
C1 (pF)
100
47
22
22
22
12
12
C2 (pF)
100
47
22
22
22
2.2
1.0
C3 (pF)
18
6.8
0.5
0.5
0.5
1.2
1.8
C4 (pF)
100
100
22
22
22
12
12
C7 (pF)
6.8
2.2
1.5
1.5
1.5
1.0
0.5
L1 (nH)
47
47
15
15
15
15
15
Table 6. Matching Component Spacing
Frequency (MHz)
450 to 500
800 to 960
1805 to 2170
2300 to 2400
2500 to 2700
λ1 (mils)
391
200
300
225
142
λ2 (mils)
75
75
75
75
75
Rev. 0 | Page 11 of 16
λ3 (mils)
364
100
175
125
89
λ4 (mils)
50
350
275
125
75
ADL5320
The ADL5320 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
−10 dB input return loss while maximizing OIP3. The load-pull
plots (Figure 28, Figure 29, and Figure 30) 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 7 and
Table 8 for maximum gain and maximum OIP3, respectively.
The contours show how each parameter degrades as it is moved
away from the optimum point.
From the data shown in Table 7 and Table 8 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 28 through Figure 30. Thus, 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.
05840-028
MATCHING PROCEDURE
Figure 28. Load-Pull Contours, 880 MHz
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05840-029
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.
1.
Install the recommended tuning components for a 800 MHz
to 960 MHz tuning band, but do not install C3 and C7.
2.
Connect the evaluation board to a vector network analyzer
so that input and output return loss can be viewed simultaneously.
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 as the user is tuning for a lower frequency).
Repeat the process.
4.
Once the desired gain and return loss are realized, OIP3
should be measured. Most likely, it will 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. 0 | Page 12 of 16
Figure 29. Load-Pull Contours, 2140 MHz
05840-030
For example, to optimize the ADL5320 for optimum OIP3 and
gain at 700 MHz use the following steps:
Figure 30. Load-Pull Contours, 2600 MHz
ADL5320
ΓLoad
(Magnitude)
0.5147
0.6611
0.5835
ΓLoad (°)
159.88
134.40
133.80
Gain MAX (dB)
17.76
13.78
12.36
Table 8. Load Conditions for IP3 MAX
Frequency (MHz)
880
2140
2600
ΓLoad
(Magnitude)
0.4156
0.5035
0.4595
ΓLoad (°)
−138.22
+110.27
+102.48
IP3 MAX (dBm)
46.29
42.72
43.01
W-CDMA ACPR PERFORMANCE
Figure 31 shows a plot of adjacent channel power ratio (ACPR)
vs. POUT for the ADL5320. The signal type being used is a single
W-CDMA carrier (Test Model 1−64) at 2140 MHz. This signal
is generated by a very low ACPR source. ACPR is measured at
the output by a high dynamic range spectrum analyzer, which
incorporates an instrument noise correction function.
–30
–40
–50
–60
–70
–80
–90
–20
–15
–10
–5
0
5
POUT (dBm)
10
15
20
05840-031
Frequency (MHz)
880
2140
2600
The ADL5320 achieves an ACPR of −82 dBc at 0 dBm output,
at which point device noise and not distortion is beginning to
dominate the power in the adjacent channels. At an output
power of 10 dBm, ACPR is still very low at −70 dBc making the
device particularly suitable for PA driver applications.
ACPR @ 5MHz CARRIER OFFSET (dBc)
Table 7. Load Conditions for Gain MAX
Figure 31. ACPR vs. POUT, Single Carrier W-CDMA (Test Model 1−64) at 2140
MHz Evaluation Board
www.BDTIC.com/ADI
Rev. 0 | Page 13 of 16
ADL5320
EVALUATION BOARD
The schematic of the ADL5320 evaluation board is shown in
Figure 32. This evaluation board uses 25 mil wide traces and is
made from FR4 material. The evaluation board comes tuned for
operation in the 1805 MHz to 2140 MHz tuning band. Tuning
options for other frequency bands are also provided in Table 9.
The recommended placement for these components is provided
in Table 10. 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
10uF
10nF
22pF
C1
22pF
15nH
C3
0.5pF
C2
22pF
C7
1.5pF
VSUP
(2)
GND
C6 10µF
C5 10nF
05840-033
C4 22pF
C3
0.5pF
L1
15nH
3
λ2
λ3
λ4
C2
22pF
RFOUT
Figure 33. Evaluation Board Layout and Default Component Placement for
Operation from 1805 MHz to 2170 MHz
05840-032
2
RFOUT
λ1
1
GND
RFIN
C1
22pF
RFIN
ADL5320
C7
1.5pF
Figure 32. Evaluation Board, 1805 MHz to 2170 MHz
www.BDTIC.com/ADI
Table 9. Evaluation Board Configuration Options
Component
C1, C2
C4, C5, C6
L1
C3, C7
R1
VSUP, GND
Function
AC coupling
capacitors
Power supply
bypassing
capacitors
DC bias
inductor
Tuning
capacitors
Power supply
connections
450 MHz to 500 MHz
0402, 100 pF
800 MHz to 960 MHz
0402, 47 pF
1805 MHz to
2170 MHz
(Default
Configuration)
0402, 22pF
C4 = 0603 100 pF
C5 = 0603 10 nF
C6 = 1206 10 μF
0603, 47 nH
C4 = 0603 100 pF
C5 = 0603 10 nF
C6 = 1206 10 μF
0603, 47 nH
C4 = 0402 22pF
C5 = 0603 10 nF
C6 = 1206 10 μF
0603, 15 nH
C3 = 0402 18 pF
C7 = 0402 6.8 pF
C3 = 0402 6.8 pF
C7 = 0402 2.2 pF
C3 = 0402 0.5 pF
C7 = 0402 1.5 pF
VSUP red test
loop, GND black test
loop
VSUP red test
loop, GND black test
loop
VSUP red test
loop, GND black
test loop
2300 MHz to
2400 MHz
C1= 0402 12 pF
C2 = 0402 2.2 pF
C4 = 0603 12 pF
C5 = 0603 10 nF
C6 = 1206 10 μF
0603, 15 nH
2500 MHz to
2700 MHz
C1 = 0402 12 pF
C2 = 0402 1.0 pF
C4 = 0603 12 pF
C5 = 0603 10 nF
C6 = 1206 10 μF
0603, 15 nH
C3 = 0402 1.2 pF
C7 = 0402 1.0 pF
R1 = 0402 0 Ω
VSUP red test
loop, GND black
test loop
C3 = 0402 1.8 pF
C7 = 0402 0.5 pF
R1 = 0402 0 Ω
VSUP red test
loop, GND black
test loop
Table 10. Recommended Component Spacing on Evaluation Board
Frequency (MHz)
450 to 500
800 to 960
1805 to 2170
2300 to 2400
2500 to 2700
λ1 (mils)
391
200
300
225
142
λ2 (mils)
75
75
75
75
75
Rev. 0 | Page 14 of 16
λ3 (mils)
364
100
175
125
89
λ4 (mils)
50
350
275
125
75
ADL5320
10uF
10uF
10nF
10nF
100pF
C1
100pF
15nH
C3
1.2pF
C7
1pF
C2
2.2pF
R1 0Ω
05840-037
05840-035
C7
6.8pF
C3
18pF
12pF
C1
12pF
C2
100pF
47nH
Figure 34. Evaluation Board Layout and Component Placement
450 MHz to 500 MHz Operation
Figure 36. Evaluation Board Layout and Component Placement
2300 MHz to 2400 MHz Operation
10uF
10uF
10nF
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100pF
C1
47pF
47nH
C1
12pF
C7
2.2pF
C3
1.8pF
10nF
12pF
15nH
C7
0.5pF
C2
1.0pF
R1 0Ω
05840-036
05840-034
C3
6.8pF
C2
47pF
Figure 35. Evaluation Board Layout and Component Placement
800 MHz to 960 MHz Operation
Figure 37. Evaluation Board Layout and Component Placement
2500 MHz to 2700 MHz Operation
Rev. 0 | Page 15 of 16
ADL5320
OUTLINE DIMENSIONS
*1.55 REF
(2)
4.25
3.94
1
2
2.60
2.30
3
1.20
0.90
1.50 TYP
3.00 TYP
4.60
4.40
1.60
1.40
0.44
0.35
END VIEW
*0.52
0.32
*COMPLIANT TO JEDEC STANDARDS TO-243 WITH
EXCEPTION TO DIMENSIONS INDICATED BY AN ASTERISK.
040407-A
*0.58
0.40
Figure 38. 3−Lead Small Outline Transistor Package [SOT-89]
(RK-3)
Dimensions shown in millimeters
ORDERING GUIDE
Model
ADL5320ARKZ-R7 1
ADL5320-EVALZ1
1
Temperature Range
−40°C to +85°C
Package Description
3-Lead SOT-89, 7“ Tape and Reel
Evaluation Board
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Z = RoHS Compliant Part.
©2008 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D05840-0-2/08(0)
Rev. 0 | Page 16 of 16
Package Option
RK-3