ANALOG DEVICES ADL5531 Service Manual
20 MHz to 500 MHz
FEATURES
Fixed gain of 20 dB
Operation up to 500 MHz
Input/output internally matched to 50 Ω
Integrated bias control circuit
Output IP3
41 dBm at 70 MHz
39 dBm at 190 MHz
Output 1 dB compression: 20.6 dB at 190 MHz
Noise figure: 2.5 dB at 190 MHz
Single 5 V power supply
Small footprint 8-lead LFCSP
ADL5534 20 dB gain dual-channel version
±2 kV ESD (Class 2)
GENERAL DESCRIPTION
The ADL5531 is a broadband, fixed-gain, linear amplifier
that operates at frequencies up to 500 MHz. The device can be
used in a wide variety of equipment, including cellular, satellite,
broadband, and instrumentation equipment.
The ADL5531 provides a gain of 20 dB, which is stable over
frequency, temperature, power supply, and from device to device.
This amplifier is single ended and internally matched to 50 Ω.
Only input/output ac coupling capacitors, power supply decoupling
capacitors, and external inductors are required for operation.
IF Gain Block
ADL5531
FUNCTIONAL BLOCK DIAGRAM
ADL5531
NC 1
RFIN 2
NC 3
NC
NC = NO CONNECT
BIAS
CONTROL
4
LINEARIZE R
Figure 1.
The ADL5531 is fabricated on a GaAs HBT process and has
an ESD rating of ±2 kV (Class 2). The device is packaged in an
8-lead 3 mm × 3 mm LFCSP that uses an exposed paddle for
excellent thermal impedance.
The ADL5531 consumes 100 mA on a single 5 V supply and is
fully specified for operation from −40°C to +85°C.
The dual-channel 20 dB gain version, ADL5534, is also available
from Analog Devices, Inc.
8NC
7RFOUT
6NC
5CLIN
06833-001
Rev. A
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.
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Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ©2007–2008 Analog Devices, Inc. All rights reserved.
ADL5531
TABLE OF CONTENTS
Features .............................................................................................. 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Typical Scattering Parameters ..................................................... 4
Absolute Maximum Ratings ............................................................ 5
ESD Caution .................................................................................. 5
Pin Configuration and Function Descriptions ............................. 6
REVISION HISTORY
8/08—Rev. 0 to Rev. A
Changes to Features Section and General Description
Section ................................................................................................ 1
Added Exposed Pad Notation to Outline Dimensions ............. 11
8/07—Revision 0: Initial Version
Typical Performance Characteristics ..............................................7
Basic Connections .............................................................................9
Soldering Information and Recommended PCB
Land Pattern ...................................................................................9
Evaluation Board ............................................................................ 10
Outline Dimensions ....................................................................... 11
Ordering Guide .......................................................................... 11
Rev. A | Page 2 of 12
ADL5531
SPECIFICATIONS
VPOS = 5 V and TA = 25°C, unless otherwise noted.
Table 1.
Parameter Conditions Min Typ Max Unit
OVERALL FUNCTION
Frequency Range 20 500 MHz
Gain (S21) 190 MHz 20.3 dB
Input Return Loss (S11) 190 MHz −19.5 dB
Output Return Loss (S22) 190 MHz −26.5 dB
Reverse Isolation (S12) 190 MHz −23.0 dB
FREQUENCY = 70 MHz
Gain 20.9 dB
vs. Frequency ± 5 MHz ±0.03 dB
vs. Temperature −40°C ≤ TA ≤ +85°C ±0.22 dB
vs. Supply 4.75 V to 5.25 V ±0.19 dB
Output 1 dB Compression Point 20.4 dBm
Output Third-Order Intercept Δf = 1 MHz, output power (P
Noise Figure 2.5 dB
FREQUENCY = 190 MHz
Gain 19.7 20.3 21.0 dB
vs. Frequency ± 50 MHz ±0.12 dB
vs. Temperature −40°C ≤ TA ≤ +85°C ±0.22 dB
vs. Supply 4.75 V to 5.25 V ±0.17 dB
Output 1 dB Compression Point 20.6 dBm
Output Third-Order Intercept Δf = 1 MHz, output power (P
Noise Figure 2.5 dB
FREQUENCY = 380 MHz
Gain 19.2 19.7 20.5 dB
vs. Frequency ± 50 MHz ±0.15 dB
vs. Temperature −40°C ≤ TA ≤ +85°C ±0.24 dB
vs. Supply 4.75 V to 5.25 V ±0.15 dB
Output 1 dB Compression Point 20.4 dBm
Output Third-Order Intercept Δf = 1 MHz, output power (P
Noise Figure 3.0 dB
POWER INTERFACE Pin RFOUT
Supply Voltage 4.75 5 5.25 V
Supply Current 100 110 mA
vs. Temperature −40°C ≤ TA ≤ +85°C ±15 mA
Power Dissipation VPOS = 5 V 0.5 W
) = 0 dBm per tone 41.0 dBm
OUT
) = 0 dBm per tone 39.0 dBm
OUT
) = 0 dBm per tone 36.0 dBm
OUT
Rev. A | Page 3 of 12
ADL5531
TYPICAL SCATTERING PARAMETERS
VPOS = 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.
Frequency
(MHz)
20 −19.9933 −132.614 21.99753 173.7349 −24.2574 4.854191 −19.1444 −46.7161
50 −19.6622 −151.093 21.20511 170.3258 −23.4894 5.603544 −21.4752 −89.9497
100 −17.9244 −166.031 20.83152 167.5595 −23.22 6.119636 −23.0386 −115.741
150 −18.4041 −177.116 20.67117 164.1871 −23.0914 6.631844 −23.335 −119.722
200 −18.6386 +179.6269 20.56097 160.4721 −22.9921 7.784913 −22.8555 −115.855
250 −19.2303 +175.3384 20.45422 156.5272 −22.9219 8.763143 −21.6619 −111.307
300 −19.4456 +175.0622 20.34563 152.4398 −22.8475 9.908631 −20.2707 −106.681
350 −20.1783 +173.422 20.21365 148.3008 −22.7662 11.21706 −18.7007 −104.369
400 −20.2409 +174.1593 20.07116 144.2311 −22.665 12.36953 −17.1242 −103.565
450 −20.7266 +175.6233 19.90932 140.0789 −22.5569 13.57857 −15.726 −103.863
500 −20.6064 +175.853 19.72779 135.9952 −22.4519 14.73385 −14.41 −105.079
Magnitude (dB) Angle (°) Magnitude (dB) Angle (°) Magnitude (dB) Angle (°) Magnitude (dB) Angle (°)
S11 S21 S12 S22
Rev. A | Page 4 of 12
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