adl5385 Analog Devices, Inc., adl5385 Datasheet
adl5385
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adl5385 Summary of contents
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... SPLITTER LOIN QBBP QBBN Figure 1. The ADL5385 can be used as either direct-to-RF modulator in digital communication systems. The wide baseband input bandwidth allows for either baseband drive or drive from a complex IF. Typical applications are in radio-link transmitters, cable modem termination systems, and broadband wireless access systems ...
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... ADL5385 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 Product Description......................................................................... 1 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 6 ESD Caution.................................................................................. 6 Pin Configuration and Functional Descriptions.......................... 7 Typical Performance Characteristics ............................................. 8 Circuit Description......................................................................... 12 Overview...................................................................................... 12 LO Interface................................................................................. 12 V-to-I Converter......................................................................... 12 Mixers .......................................................................................... 12 D-to-S Amplifier......................................................................... 12 Bias Circuit .................................................................................. 12 REVISION HISTORY 10/06—Revision 0: Initial Version Basic Connections .......................................................................... 13 Optimization ...
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... OUT = −3 dBm per tone OUT )), dBm BB OUT )), dBm BB OUT = −3 dBm per tone OUT =−3 dBm per tone OUT Rev Page ADL5385 Min Typ Max Unit 50 2200 MHz 100 4400 MHz 4 5.6 8 dBm 11 dBm − ...
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... ADL5385 Parameter Conditions Second Baseband Harmonic (F − (2 × Third Baseband Harmonic ( × Output IP2 F1 = 3.5 MHz 4.5 MHz, P Output IP3 F1 = 3.5 MHz 4.5 MHz, P Quadrature Phase Error I/Q Amplitude Balance Noise Floor 20 MHz offset from LO, all BB inputs at a bias of 500 mV 20 MHz offset from LO, output power = −5 dBm ...
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... OUT )), P = 2.6 dBm BB OUT = −3 dBm per tone OUT = −3 dBm per tone OUT = 1 MΩ (after full warmup) L ≤ +85° MΩ Rev Page ADL5385 Min Typ Max Unit −43 dBc −47 dBc −58 dBc −47 dBc 57 dBm 22 dBm 2 ...
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... ADL5385 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage VPOS IBBP, IBBN, QBBP, QBBN Range LOIP and LOIN Internal Power Dissipation θ (Exposed Paddle Soldered Down) JA Maximum Junction Temperature Operating Temperature Range Storage Temperature Range ESD CAUTION Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device ...
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... Common for LO Input. Must be ac-coupled to ground through a low impedance path. PIN INDICATOR 18 QBBP QBBN COM2 EXPOSED COM1 4 15 COM2 PADDLE COM1 5 14 IBBN COM1 6 13 IBBP ADL5385 4 × 4 LFCSP CONNECT Figure 2. Pin Configuration Rev Page ADL5385 ). s ...
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... ADL5385 TYPICAL PERFORMANCE CHARACTERISTICS Unless otherwise noted 25° −7 dBm; I/Q inputs = 1.4 V p-p differential sine waves in quadrature on a 500 mV dc bias baseband frequency = 1 MHz; LO source and RF output load impedances are 50 Ω –1 –2 –3 –4 50 550 ...
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... OUTPUT FREQUENCY (MHz) (Peak I Amplitude Held Constant at 0 250 450 650 850 1050 1250 1450 1650 1850 OUTPUT FREQUENCY (MHz) 50 250 450 650 850 1050 1250 1450 1650 1850 OUTPUT FREQUENCY (MHz) ADL5385 T = –40° +25° +85° +25°C A ...
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... ADL5385 –20 –30 –40 –50 –60 –70 –80 –90 –10 –8 –6 –4 – AMPLITUDE (dBm) Figure 15. Distribution of Sideband Suppression vs. LO Input Power at 50 MHz and 350 MHz –20 –30 –40 –50 –60 –70 –80 50 550 1050 1550 OUTPUT FREQUENCY (MHz) Figure 16 ...
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... Figure 24. Output Impedance and LO Input Impedance vs. Frequency 0.300 0.275 0.250 0.225 0.200 0.175 0.150 –40 TEMPERATURE (°C) Figure 25. Power Supply Current vs. Temperature and Supply Voltage Rev Page ADL5385 90 60 4400MHz 30 0 330 300 270 ...
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... The output currents then modulate the two half-frequency LO carriers in the mixer stage. MIXERS The ADL5385 has two double-balanced mixers: one for the in- phase channel (I channel) and one for the quadrature channel (Q channel). These mixers are based on the Gilbert cell design TEMP of four cross-connected transistors ...
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... COUT 0.1µF a real modulator, those two quantities are nonzero and, when mixed with the LO, result in a finite amount of carrier feedthrough. The ADL5385 is designed to provide a minimal amount of carrier feedthrough. If even lower carrier feedthrough levels are required, minor adjustments can be made to the (V V QOPN Q-channel offset is varied until a minimum carrier feedthrough level is obtained ...
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... ADL5385 When an offset applied to the I-channel inputs, IOS V = 500 /2, while IOPP IOS V = 500 mV − V /2, such that IOPN IOS V − IOPP IOPN IOS The same applies to the Q channel often desirable to perform a one-time carrier null calibration. This is usually performed at a single frequency. ...
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... I OUTA2 Figure 31. Interface Between AD9777 and ADL5385 with 50 Ω Resistors to Ground to Establish the 500 mV DC Bias for the ADL5385 Baseband Inputs The AD9777 output currents have a swing that ranges from mA. With the 50 Ω resistors in place, the ac voltage swing going into the ADL5385 baseband inputs ranges from ...
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... Carrier Feedthrough Nulling section. 155 Mbps (STM-1) 128 QAM TRANSMITTER Figure 34 shows how the ADL5385 can be interfaced to the AD9777 DAC (or any Analog Devices dual DAC with an output bias level of 0 generate a 155 Mbps 128 QAM carrier at 355 MHz ...
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... MHz to 1000 MHz + (P − OUT OUT IM(RF) is the level of the intermodulation product at IM(RF) . OIP2_RF levels from a two-tone test are plotted OUT2 250 500 750 1000 1250 1500 1750 OUTPUT FREQUENCY (MHz) ADL5385 OUT P 2LO – BB 900 1000 2000 2250 ...
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... ADF4360-8 65/400 TRANSMIT DAC OPTIONS The AD9777 recommended in the previous sections means the only DAC that can be used to drive the ADL5385. There are other appropriate DACs depending on the level of performance required. Table 6 lists the dual Tx-DACs that Analog Devices offers. ...
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... EVALUATION BOARD A populated, RoHS-compliant ADL5385 evaluation board is available. The ADL5385 has an exposed paddle underneath the package, which is soldered to the board. The evaluation board is designed without any components on the underside so that heat can be applied to the underside for easy removal and replacement of the ADL5385. ...
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... ADL5385 Yuping Toh Figure 42. Layout of Evaluation Board Rev Page ...
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... CHARACTERIZATION SETUP SSB SETUP Figure diagram of the characterization test stand setup for the ADL5385, which is intended to test the product as a single-sideband modulator. The Aeroflex IFR3416 signal generator provides the I and Q inputs as well as the LO input. Output signals are measured directly using the spectrum analyzer, and currents and voltages are measured using the Agilent 34401A multimeter. ...
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... OUTLINE DIMENSIONS PIN 1 INDICATOR 1.00 0.85 0.80 SEATING PLANE ORDERING GUIDE Model Temperature Range 1 ADL5385ACPZ-WP –40°C to +85°C ADL5385ACPZ-R2 1 –40°C to +85°C 1 ADL5385ACPZ-R7 –40°C to +85°C 1 ADL5385-EVALZ Pb-free part. 4.00 BSC SQ 0.60 MAX 0.50 BSC TOP 3.75 VIEW BSC SQ 0.50 0.40 0.30 0.80 MAX 12° MAX 0.65 TYP 0.05 MAX 0.02 NOM 0.30 COPLANARITY 0 ...
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... NOTES Rev Page ADL5385 ...
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... ADL5385 NOTES ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06118-0-10/06(0) Rev Page ...