2.3 GHz to 4.0 GHz
RF Driver Amplifier
Preliminary Technical Data ADL5321
Rev. PrB
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.
FEATURES
Operation from 2.3 GHz to 4.0 GHz
Gain of +14 dB at 2600 MHz
OIP3 of +40 dBm at 2600 MHz
P1dB of +25 dBm at 2600 MHz
Noise figure of 4 dB at 2600 MHz
Power supply of 5 V
Power supply current of 84 mA
Internal active biasing
Thermally efficient SOT−89 package
The ADL5320 is a 400 MHz to 2700 MHz driver
ESD rating of ±4 kV (Class 3A)
GENERAL DESCRIPTION
The ADL5321 is a broadband, linear driver RF amplifier that
operates at frequencies from 2.3 GHz to 4.0 GHz. The device
can be used in a wide variety of wired and wireless applications
including LTE, WiMAX, WiBro, and WLL.
The ADL5321 operates with a 5V supply voltage, while only
consuming 84 mA of current.
The ADL5321 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 is a companion part that offers lower frequency
operation from 400 MHz to 2700 MHz.
FUNCTIONAL BLOCK DIAGRAM
12
(2)
3
Bias
RFin GND
GND
RFout
ADL5321
Figure 1.
ADL5321 Preliminary Technical Data
Rev. PrB | Page 2 of 9
TABLE OF CONTENTS
Features .............................................................................................. 1
General Description......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 4
ESD Caution.................................................................................. 4
Pin Configuration and Function Descriptions..............................5
Typical Performance Characteristics ..............................................6
Evaluation Board ...............................................................................7
Outline Dimensions ..........................................................................9
Ordering Guide .............................................................................9
REVISION HISTORY
1/08—Rev. PrB: Preliminary Version
Preliminary Technical Data ADL5321
Rev. PrB | Page 3 of 9
SPECIFICATIONS
VCC = 5 V and TA = 25°C, unless otherwise noted.
Table 1.
Parameter Conditions Min Typ Max Unit
OVERALL FUNCTION
Frequency Range 2.3 4.0 GHz
FREQUENCY = 2600 MHz
Gain 13.8 dB
vs. Frequency ± 50 MHz ± 0.2 dB
vs. Temperature −40°C ≤ TA ≤ +85°C ± 0.8 dB
vs. Supply 4.75 V to 5.25 V ± 0.65 dB
Output 1 dB Compression Point 24.9 dBm
Output Third-Order Intercept ∆f = 1 MHz , Output Power (POUT) = 10 dBm per tone 39.7 dBm
Noise Figure VCC = 5 V 4.1 dB
Input Return Loss (S11) 18.3 dB
Output Return Loss (S22) 10.9 dB
Reverse Isolation (S12) 24.5 dB
FREQUENCY = 3700 MHz
Gain 12.7 dB
vs. Frequency ± 50 MHz ± 0.2 dB
vs. Temperature −40°C ≤ TA ≤ +85°C ± 1.1 dB
vs. Supply 4.75 V to 5.25 V ± 0.07 dB
Output 1 dB Compression Point 26.1 dBm
Output Third-Order Intercept ∆f = 1 MHz , POUT = 10 dBm per tone 34.1 dBm
Noise Figure VCC = 5 V 5.0 dB
Input Return Loss (S11) 20.6 dB
Output Return Loss (S22) 17.2 dB
Reverse Isolation (S12) 26.4 dB
POWER INTERFACE Pin RFOUT,
Supply Voltage 4.75 5 5.25 V
Supply Current 84 mA
vs. Temp −40°C ≤ TA ≤ +85°C 97 mA
Power Dissipation VCC = 5V 420 mW
ADL5321 Preliminary Technical Data
Rev. PrB | Page 4 of 9
ABSOLUTE MAXIMUM RATINGS
Table Summary
Table 2.
Parameter Rating
Supply Voltage, VCC 6 V
Input Power (re: 50 Ω) +20 dBm
Internal Power Dissipation (Paddle Soldered) 582 mW
θJC (Junction to Paddle) TBD °C/W
Maximum Junction Temperature TBD °C
Operating Temperature Range −40°C to +85°C
Storage Temperature Range −65°C to +150°C
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
Preliminary Technical Data ADL5321
Rev. PrB | Page 5 of 9
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
12
(2)
3
RFIN GND
GND
RFOU
T
ADL5321
Figure 2.
Table 3. Pin Function Descriptions
Pin No. Mnemonic Description
1 RFIN RF Input. Requires a dc blocking capacitor
2 GND Ground: Connect to a low impedance ground plane
3 RFOUT
RF Output and Supply Voltage: DC bias is provided to this pin through an inductor that is tied to the external
power supply. RF path requires a DC blocking capacitor.
Exposed
Paddle
Exposed Paddle: Internally connected to GND. Solder to a low impedance ground plane.
ADL5321 Preliminary Technical Data
Rev. PrB | Page 6 of 9
TYPICAL PERFORMANCE CHARACTERISTICS
0
5
10
15
20
25
30
2500 2520 2540 2560 2580 2600 2620 2640 2660 2680 2700
Frequenc y (MHz)
Gain, P1dB (dB, dBm)
Gain 25 Deg C
Gain -40 Deg C
Gain 85 Deg C
P1dB 25 Deg C
P1dB -40 Deg C
P1dB 85 Deg C
Figure 3. Gain and P1dB vs. Frequency and Temperature 2500 MHz – 2700 MHz
0.0
5.0
10.0
15.0
20.0
25.0
30.0
3500 3550 3600 3650 3700 3750 3800 3850
Freq (MHz)
Gain, P1dB (dB, dBm)
Gain 25 Deg C
Gain -40 Deg C
Gain 85 Deg C
P1 dB 25 Deg C
P1 dB -40 Deg C
P1 dB 85 Deg C
Figure 4. Gain and P1dB vs. Frequency and Temperature 3500 MHz – 3850 MHz
Pout = 10 dBm
28
30
32
34
36
38
40
42
44
-6 -4 -2 0 2 4 6 8 10121416182022242628
Pout (dBm)
OIP3 (dBm)
2500 MHz
2550 MHz
2600 MHz
2650 MHz
2700 MHz
Figure 5. OIP3 vs. Pout and Frequency 2500 MHz – 2700 MHz
28
30
32
34
36
38
40
42
44
-6 -4 -2 0 2 4 6 8 10 12 14 16 18 20 22 24
Pout (dBm)
OIP3 (dBm)
SN2_3500MHz_5V
SN2_3600MHz_5V
SN2_3700MHz_5V
SN2_3800MHz_5V
SN2_3850MHz_5V
Figure 6. OIP3 vs. Pout and Frequency 3500 MHz – 3850 MHz
Preliminary Technical Data ADL5321
Rev. PrB | Page 7 of 9
EVALUATION BOARD
The basic connections for operating the ADL5321 are shown in
Figure 8. 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 RF output pin. A bias
voltage of 5 V is recommended.
Figure 7. Evaluation Board Layout showing component placement 2500
MHz to 2700 MHz operation
RFIN
GND
GND
RFOUT
12
(2)
3
ADL5321
C1
1.0 pF
C2
10 pF
C3
1.2 p F
C6 10 u F
C5 10 nF
C4 10 pF
L1
9.5 nH
V
supGnd
1234
RFIN RFOUT
R1
0 oh m
Figure 8. Basic Connections default condition is for 2500 MHz to 2700 MHz
Table 4. Matching Component Spacing 2500 MHz - 2700 MHz
λ 11 λ 2 λ 3 λ 4
240 mils 75 mils 89 mils 325 mils
1 50 ohm traces 25 mils wide substrate used is FR4.
Table 5. Evaluation Board Configuration Options 2500 MHz - 2700 MHz
Component Function Default Value
R1 jumper 0402 0 ohm
C1 Tuning capacitor 0402 1.0 pF
C2 AC - coupling capacitor 0402 10 pF
C3 Tuning capacitors C3 0402 1.2 pF
C4, C5, C6 Power supply bypassing capacitors C4 0603 10 pF
C5 0603 10 nF
C6 1206 10μF
L1 DC bias inductor 0603 9.5 nH
Vsup, Gnd Power supply connections Vsup red testloop
Gnd Black testloop
ADL5321 Preliminary Technical Data
Rev. PrB | Page 8 of 9
RFIN
GND
GND
RFOUT
12
(2)
3
ADL5321
C1
10 pF C2
10 pF
C3
1.0 pF C7
1.2 pF
C6 10 u F
C5 10 nF
C4 10 p F
L1
9.5 n H
V
supGnd
1234
RFIN RFOUT
Figure 9. Basic Connections for 3500 MHz to 3850 MHz
Figure 10. Evaluation Board Layout showing component placement 3500 MHz to 3850 MHz operation
Table 5. Matching Component Spacing 3500 MHz – 3850 MHz
λ 11 λ 2 λ 3 λ 4
90 mils 35 mils 40 mils 416 mils
1 50 ohm traces 25 mils wide substrate used is FR4.
Table 6. Evaluation Board Configuration Options 3500 MHz – 3850 MHz
Component Function Default Value
C1, C2 AC - coupling capacitors 0402 10 pF
C4, C5, C6 Power supply bypassing capacitors C4 0603 10 pF
C5 0603 10 nF
C6 1206 10μF
L1 DC bias inductor 0603 9.5 nH
C3, C7 Tuning capacitors C3 0402 1.0 pF
C7 0402 1.2 pF
Vsup, Gnd Power supply connections Vsup red testloop
Gnd Black testloop
Preliminary Technical Data ADL5321
Rev. PrB | Page 9 of 9
OUTLINE DIMENSIONS
Figure 11. 3-Lead Small Outline Transistor Package [SOT-89] (RK-3)
Dimensions shown in millimeters
ORDERING GUIDE
Model Temperature
Range
Package Description Package
Option
Branding Ordering Quantity
ADL5321ARKZ-R71 −40°C to +85°C 3 Lead SOT89, Tape and Reel RK-3 TBD TBD
ADL5231-EVALZ1 Evaluation Board
1 Z = RoHS Compliant Part.
©2008 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
PR07307-0-1/08(PrB)
