400 MHz to 6 GHz Quadrature Demodulator Data Sheet ADL5380 FEATURES FUNCTIONAL BLOCK DIAGRAM ENBL ADJ Operating RF and LO frequency: 400 MHz to 6 GHz Input IP3 ADL5380 IHI BIAS 30 dBm at 900 MHz 28 dBm at 1900 MHz Input IP2: >65 dBm at 900 MHz ILO Input P1dB (IP1dB): 11.6 dBm at 900 MHz Noise figure (NF) LOIP 10.9 dB at 900 MHz RFIN QUADRATURE 11.7 dB at 1900 MHz V2I PHASE SPLITTER RFIP Voltage conversion gain: ~7 dB LOIN Quadrature demodulation accuracy at 900 MHz QHI Phase accuracy: ~0.2 Amplitude balance: ~0.07 dB Demodulation bandwidth: ~390 MHz QLO Baseband I/Q drive: 2 V p-p into 200 Single 5 V supply Figure 1. APPLICATIONS Cellular W-CDMA/GSM/LTE Microwave point-to-(multi)point radios Broadband wireless and WiMAX GENERAL DESCRIPTION The ADL5380 is a broadband quadrature I-Q demodulator that The fully balanced design minimizes effects from second-order covers an RF/IF input frequency range from 400 MHz to 6 GHz. distortion. The leakage from the LO port to the RF port is With a NF = 10.9 dB, IP1dB = 11.6 dBm, and IIP3 = 29.7 dBm at <50 dBm. Differential dc offsets at the I and Q outputs are 900 MHz, the ADL5380 demodulator offers outstanding dynamic typically <20 mV. Both of these factors contribute to the range suitable for the demanding infrastructure direct-conversion excellent IIP2 specification, which is >65 dBm. requirements. The differential RF inputs provide a well-behaved The ADL5380 operates off a single 4.75 V to 5.25 V supply. The broadband input impedance of 50 and are best driven from a supply current is adjustable by placing an external resistor from 1:1 balun for optimum performance. the ADJ pin to either the positive supply, V , (to increase supply S Excellent demodulation accuracy is achieved with amplitude current and improve IIP3) or to ground (which decreases supply and phase balances of ~0.07 dB and ~0.2, respectively. The current at the expense of IIP3). demodulated in-phase (I) and quadrature (Q) differential outputs The ADL5380 is fabricated using the Analog Devices, Inc., are fully buffered and provide a voltage conversion gain of ~7 dB. advanced silicon-germanium bipolar process and is available The buffered baseband outputs are capable of driving a 2 V p-p in a 24-lead exposed paddle LFCSP. differential signal into 200 . Rev. B Document Feedback 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20092014 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 07585-001ADL5380 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 LO Interface ................................................................................ 22 Applications ....................................................................................... 1 V-to-I Converter ........................................................................ 22 Functional Block Diagram .............................................................. 1 Mixers .......................................................................................... 22 General Description ......................................................................... 1 Emitter Follower Buffers ........................................................... 22 Revision History ............................................................................... 2 Bias Circuit .................................................................................. 22 Specifications ..................................................................................... 3 Applications Information .............................................................. 23 Absolute Maximum Ratings ............................................................ 5 Basic Connections ...................................................................... 23 ESD Caution .................................................................................. 5 Power Supply ............................................................................... 23 Pin Configuration and Function Descriptions ............................. 6 Local Oscillator and RF Inputs ................................................. 24 Typical Performance Characteristics ............................................. 7 Baseband Outputs ...................................................................... 25 Low Band Operation .................................................................... 7 Error Vector Magnitude (EVM) Performance ........................... 25 Midband Operation ................................................................... 11 Low IF Image Rejection ............................................................. 26 High Band Operation ................................................................ 14 Example Baseband Interface ..................................................... 27 Distributions for f = 900 MHz ............................................... 17 Characterization Setups ................................................................. 31 LO Distributions for f = 1900 MHz ............................................. 18 Evaluation Board ............................................................................ 33 LO Distributions for f = 2700 MHz ............................................. 19 Thermal Grounding and Evaluation Board Layout ............... 35 LO Distributions for fLO = 3600 MHz ............................................. 20 Outline Dimensions ....................................................................... 36 Distributions for fLO = 5800 MHz ............................................. 21 Ordering Guide .......................................................................... 36 Circuit Description ......................................................................... 22 REVISION HISTORY 12/14Rev. A to Rev. B Changes to Figure 2 and Table 3 ..................................................... 6 Updated Outline Dimensions ....................................................... 36 Changes to Ordering Guide .......................................................... 36 7/13Rev. 0 to Rev. A Changes to Table 2 ............................................................................ 5 Deleted Local Oscillator (LO) Input Section .............................. 23 Changed RF Input Section to Local Oscillator and RF Inputs Section .............................................................................................. 24 Added Figure 78, Figure 79, and Figure 82, Renumbered Sequentially .............................................................. 24 Added Figure 83 and Figure 84 .................................................... 25 Changes to Evaluation Board Section and Figure 102 .............. 33 Changes to Table 5 and Figure 103 Caption ............................... 34 Deleted Figure 100, Figure 101, and Figure 102 ......................... 34 Updated Outline Dimensions ....................................................... 36 Changes to Ordering Guide .......................................................... 36 7/09Revision 0: Initial Version Rev. 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