ADL5371 Analog Devices, Inc., ADL5371 Datasheet
ADL5371
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ADL5371 Summary of contents
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... WiMAX/broadband wireless access systems Cable communication equipment Satellite modems GENERAL DESCRIPTION The ADL5371 is a member of the fixed-gain quadrature modulator (F-MOD) family designed for use from 500 MHz to 1500 MHz. Its excellent phase accuracy and amplitude balance enable high performance intermediate frequency or direct radio frequency modulation for communication systems. The ADL5371 provides a > ...
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... ADL5371 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 4 ESD Caution.................................................................................. 4 Pin Configuration and Function Descriptions............................. 5 Typical Performance Characteristics ............................................. 6 Theory of Operation ...................................................................... 10 Circuit Description..................................................................... 10 Basic Connections .......................................................................... 11 Power Supply and Grounding................................................... 11 Baseband Inputs.......................................................................... 11 LO Input ...................................................................................... 11 RF Output.................................................................................... 11 REVISION HISTORY 1/07— ...
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... P = 6.2 dBm LO BB OUT = 4.5 MHz 1.6 dBm per tone BB OUT = 4.5 MHz 1.6 dBm per tone BB OUT = 5 dBm dBm 940 MHz OUT LO Rev Page ADL5371 Min Typ Max Unit 500 MHz 1500 MHz 7.6 dBm 14.4 dBm −50 dBm −55 dBc 0.1 Degrees − ...
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... ADL5371 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage VPOS IBBP, IBBN, QBBP, QBBN LOIP and LOIN 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 ...
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... Connect to ground plane via a low impedance path. COM1 1 18 VPS5 F-MOD COM1 2 17 VPS4 VPS1 3 16 VPS3 TOP VIEW VPS1 4 15 VPS2 (Not to Scale) VPS1 5 14 VPS2 VPS1 6 13 VOUT Figure 2. Pin Configuration Rev Page ADL5371 ). To ensure ensure ensure S ...
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... ADL5371 TYPICAL PERFORMANCE CHARACTERISTICS 25° dBm single-ended; baseband I/Q amplitude = 1.4 V p-p differential sine waves in quadrature with a 500 bias; baseband I/Q frequency ( MHz, unless otherwise noted –40° +85° 500 600 ...
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... FEEDTHROUGH (dBm) – –40°C A –50 –60 –70 –80 0.2 Figure 14. Second- and Third-Order Distortion, Carrier Feedthrough, Sideband Suppression, and SSB P Rev Page ADL5371 = +85° –40° +25° 600 700 800 900 1000 1100 1200 1300 1400 1500 LO FREQUENCY (MHz) Figure 12 ...
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... ADL5371 –20 –30 THIRD-ORDER –40 THIRD-ORDER T = +85° +25°C A –50 –60 SECOND-ORDER T = +25°C A –70 SECOND-ORDER T = +85°C A –80 500 600 700 800 900 1000 1100 1200 1300 1400 1500 LO FREQUENCY (MHz) Figure 15. Second- and Third-Order Distortion vs. f (Baseband I/Q Amplitude = 1.4 V p-p Differential) – ...
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... NOISE AT 20MHz OFFSET (dBm/Hz) Figure 21. 20 MHz Offset Noise Floor Distribution at f (I/Q Amplitude = 0 mV p-p with 500 mV dc Bias 915MHz LO = 915 MHz LO Rev Page ADL5371 ...
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... ADL5371 THEORY OF OPERATION CIRCUIT DESCRIPTION Overview The ADL5371 can be divided into five circuit blocks: the LO interface, the baseband voltage-to-current (V-to-I) converter, the mixers, the differential-to-single-ended (D-to-S) converter, and the bias circuit. A detailed block diagram of the device is shown in Figure 22. LOIP PHASE SPLITTER ...
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... This results in a reduction in the C16 usable input ac swing range. The nominal dc bias of 500 mV 0.1µF allows for the largest ac swing, limited on the bottom end by the ADL5371 input range and on the top end by the output compliance C15 0.1µF range on most DACs from Analog Devices. VPS5 ...
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... In a real modulator, those two quantities are nonzero, and, when mixed with the LO, they result in a finite amount of carrier feedthrough. The ADL5371 is designed to provide a minimal amount of carrier feedthrough. Should even lower carrier feedthrough levels be required, minor adjustments can be made to the (V and (V − ...
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... OUT2_P Figure 27. Interface Between the AD9779 and ADL5371 with 50 Ω Resistors to Ground to Establish the 500 mV dc Bias for the ADL5371 Baseband Inputs The AD9779 output currents have a swing that ranges from mA. With the 50 Ω resistors in place, the ac voltage swing going into the ADL5371 baseband inputs ranges from ...
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... AUX2_P 500Ω Figure 31. DAC Modulator Interface with Auxiliary DAC Resistors GSM OPERATION Figure 32 shows the GSM/EDGE EVM and spectral mask performance vs. output power for the ADL5371 at 940 MHz. For a given LO amplitude, the performance is independent of output power. F-MOD 19 IBBP RSLI 100Ω ...
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... One is chosen, depending on the local oscillator frequency required. While the use of the integrated synthesizer may come at the expense of slightly degraded noise performance from the ADL5371, it can be a cheaper alternative to a separate PLL and VCO solution. Table 5 shows the options available. ...
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... This exposed paddle must be soldered to the board (see the Power Supply and Grounding section). The evaluation board is designed without any components on the underside so heat can be applied to the underside for easy removal and replacement of the ADL5371. QBBP QBBN IBBN ...
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... POWER SUPPLY 6V – + The primary setup used to characterize the ADL5371 is shown in Figure 36. This setup was used to evaluate the product as a single-sideband modulator. The Aeroflex signal generator supplied the LO and differential I/Q baseband signals to the device under test, DUT. The typical LO drive was 0 dBm. The I channel is driven by a sine wave, and the Q channel is driven by a cosine wave ...
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... Figure 37. Setup for Baseband Frequency Sweep and Undesired Sideband Nulling The setup used to evaluate baseband frequency sweep and undesired sideband nulling of the ADL5371 is shown in Figure 37. The interface board has circuitry that converts the single-ended I/Q inputs from the arbitrary function generator to differential I/Q baseband signals with a dc bias of 500 mV ...
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... Package Description 24-Lead LFCSP_VQ, 7” Tape and Reel 24-Lead LFCSP_VQ, 7” Tape and Reel 24-Lead LFCSP_VQ, Waffle Pack Evaluation Board Rev Page 0.60 MAX PIN 1 INDICATOR 2.45 EXPOSED 2.30 SQ PAD (BO TTOMVIEW) 2. 0.23 MIN 2.50 REF Package Option Ordering Quantity CP-24-2 250 CP-24-2 1,500 CP-24-2 64 ADL5371 ...
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... ADL5371 NOTES ©2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06510-0-1/07(0) T Rev Page ...