ADL5592-EVALZ AD [Analog Devices], ADL5592-EVALZ Datasheet

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ADL5592-EVALZ

Manufacturer Part Number
ADL5592-EVALZ
Description
250 MHz to 2400 MHz RF Variable Gain Amplifier
Manufacturer
AD [Analog Devices]
Datasheet
FEATURES
Output frequency range: 250 MHz to 2400 MHz
Noise figure: 5.7 dB at 1960 MHz
OIP3 at 1960 MHz: 29 dBm at P
2 digital attenuators, each with 31 dB range
1 dB attenuation step size
Single SPI port
Single supply: 4.5 V to 5.5 V
40-lead, 6 mm × 6 mm LFCSP package
APPLICATIONS
GSM/EDGE and cellular communications systems
GENERAL DESCRIPTION
The ADL5592 is a digitally programmable variable gain
amplifier (VGA) designed for use from 250 MHz to 2400 MHz.
Two digitally programmable attenuators are cascaded with a
high linearity fixed-gain amplifier. The device also includes a
mixer, which can be used to mix the transmitted signal into an
adjacent receive band for loopback testing.
The ADL5592 can be used in conjunction with a direct-to-RF
modulator, such as
communications systems such as GSM/EDGE.
The ADL5592 is available in a 6 mm × 6 mm, 40-lead exposed-
paddle LFCSP package. The device operates from the −40°C to
+85°C temperature range.
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.
ADL537x
and ADL539x, in cellular
IN
= 0 dBm per tone
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
LOOP EN
RF Variable Gain Amplifier
RFIN
LOIP
FUNCTIONAL BLOCK DIAGRAM
*COMPRISES THE DATA, CLK, AND LE PINS.
LOOP OUT
250 MHz to 2400 MHz
©2008 Analog Devices, Inc. All rights reserved.
Figure 1.
ATTENUATOR
CIRCUITRY
SPI PORT*
CONTROL
ADL5592
ADL5592
www.analog.com
RFOUT

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ADL5592-EVALZ Summary of contents

Page 1

... ADL537x and ADL539x, in cellular communications systems such as GSM/EDGE. The ADL5592 is available × 6 mm, 40-lead exposed- paddle LFCSP package. The device operates from the −40°C to +85°C temperature range. 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 ...

Page 2

... ADL5592 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 6 ESD Caution .................................................................................. 6 Pin Configuration and Function Descriptions ............................. 7 Typical Performance Characteristics ............................................. 8 Theory of Operation ...................................................................... 11 Input Switch ................................................................................ 11 Digital Attenuator ....................................................................... 11 SPI Interface ................................................................................ 11 REVISION HISTORY 6/08—Revision 0: Initial Version   Fixed-Gain Amplifier................................................................. 11   ...

Page 3

... A = 0°C to 85° dBm, 8 PSK, OUT = 12 dBm, 8 PSK OUT = 0°C to 85° 0°C to 85° dBm, 8 PSK OUT Rev Page ADL5592 Min Typ Max Unit 250 2400 MHz 28 30 −0.02 ±1 ...

Page 4

... ADL5592 Parameter Conditions Error Vector Magnitude (EVM) P RMS Peak DIGITAL ATTENUATORS— 1805 MHz to 1990 MHz Attenuation Range Attenuator Step Size Relative Step Accuracy Absolute Step Accuracy Step Size Variation vs. Frequency Variation within transmit band Dynamic Range Variation vs. T Temperature RFOUT Power RFIN = 4 dBm, minimum attenuation vs ...

Page 5

... Loopback inactive OUT = 4 dBm INATT1 = 25° −40°C to +85° 25° −40°C to +85°C A Rev Page Min Typ Max 0 0.8 2.4 5 500 −68 −50 − dBm −50 4.5 5.0 5.5 230 255 189 208 ADL5592 Unit dBm dBm ...

Page 6

... ADL5592 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage VCC RFIN LOIP LOOP EN, DATA, CLK, LE Internal Power Dissipation θ (Exposed Paddle Soldered Down) JA Maximum Junction Temperature Operating Temperature Range Storage Temperature Range Stresses above those listed under Absolute Maximum Ratings Rating may cause permanent damage to the device. This is a stress 5.5 V rating only ...

Page 7

... Common. Connect to a low impedance ground plane. No Connection. The pad for Pin 28 and Pin 31 must remain free of traces to avoid stray capacitances. Exposed Paddle. Connect to a low impedance ground plane. Rev Page GND NC GND 25 GND 24 GND GND 21 VCC ADL5592 ...

Page 8

... ADL5592 TYPICAL PERFORMANCE CHARACTERISTICS T = 25° 5.0 V, unless otherwise noted 0dB 10 0 –10 –20 31dB –30 –40 –50 250 500 750 1000 1250 1500 FREQUENCY (MHz) Figure 3. Gain vs. Frequency by Gain Code, All Input Attenuator (ATTN 1) Code Steps 20 0dB 10 0 –10 – ...

Page 9

... Figure 14. Absolute Gain Error Across Temperature, Frequency = 1960 MHz (Each Attenuator Is Swept Independently from 0 to 31) Rev Page ADL5592 –40°C –25°C 0°C +25°C +85°C ATTENUATOR 1 ATTENUATOR GAIN CODE GAIN CODE –40°C – ...

Page 10

... ADL5592 14 492.4MHz 12 925.2MHz 10 1960MHz 4.50 4.75 5.00 SUPPLY VOLTAGE (V) Figure 15. Gain vs. Supply Voltage at Maximum Gain 5.25 5.50 Rev Page ...

Page 11

... Figure 16. Simplified Schematic INPUT SWITCH The high performance single-pole, double throw (SPDT) GaAs pHEMT switch is connected to the RF input pin of the ADL5592 to switch the input signal between the VGA and the mixer. To diminish the impact of the switch on the performance of the VGA and the mixer, this SPDT switch exhibits low insertion loss and high isolation in the operating frequency range ...

Page 12

... VPOS 0.1µF 100pF BASIC CONNECTIONS Figure 17 shows the basic connections for the ADL5592. A single power supply between 4.75 V and 5. applied to the VCC pins. All the VCC pins must be connected to the same potential. Each power supply pin should be decoupled using a 100 pF capacitor in addition to either a 0.1 μ μF capacitor. ...

Page 13

... Rev Page ADL5592 TRANSFER DATA FROM SERIAL REGISTER TO PARALLEL LATCHES ON LE FALLING EDGE. Resulting Attenuation ATTN 2 (dB) Total Attenuation (dB ...

Page 14

... ADL5592 GSM/EDGE TRANSMIT APPLICATION Figure 20, Figure 21, and Figure 22 show effects of different input power levels on the spectral mask and EVM. The gain code is held constant at the minimum attenuation (corresponding to Code 0 for both attenuators). At low output power levels, both the spectral mask and EVM remain flat ...

Page 15

... A Rohde & Schwarz SMT 03 signal generator was used to drive the amplifier with a 4 dBm input. The output of the ADL5592 was connected to a Rohde & Schwarz FSIQ7 spectrum analyzer through an RF switch matrix unit. For the linearity measurement, two SMT 03 signal generators were used to generate the two-tone RF input signal ...

Page 16

... ADL5592 SCHEMATIC AND LAYOUT Figure 24 shows the schematic and Figure 25 and Figure 26 show the layout of the ADL5592 evaluation board. The board is powered by a single supply in the 4. 5.25 V range. Each power supply pin should be decoupled using a 100 pF capacitor in addition to either a 0.1 μ μF capacitor. Table 6 details the various configuration options of the evaluation board ...

Page 17

... Figure 25. Evaluation Board Layout, Component Side Figure 26. Evaluation Board Layout, Circuit Side Rev Page ADL5592 ...

Page 18

... C7A μF (C11A) capacitor at each power supply pin. A series inductor, L2A, is used to bias the open collector at Pin 21. To tune the ADL5592 for the low bands (450 MHz, 850 MHz, and 900 MHz), the value should be 270 nH. For the high bands (1800 MHz and 1900 MHz), the inductor should be changed ...

Page 19

... OUTLINE DIMENSIONS INDEX AREA 0.80 0.75 0.70 SEATING PLANE ORDERING GUIDE Model Temperature Range 1 ADL5592ACPZ-R7 −40°C to +85°C ADL5592-EVALZ RoHS Compliant Part. 6.00 BSC 0.50 BSC EXPOSED PAD 21 20 0.50 BOTTOM VIEW TOP VIEW 0.40 0.30 THE EXPOSED METAL PADDLE ON THE 0.05 MAX BOTTOM OF THE LFCSP PACKAGE MUST BE SOLDERED TO PCB GROUND 0 ...

Page 20

... ADL5592 NOTES ©2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06662-0-6/08(0) Rev Page ...

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