ADL5385 Modulator Datasheet

ADL5385 Datasheet PDF, Equivalent


Part Number

ADL5385

Description

Quadrature Modulator

Manufacture

Analog Devices

Total Page 24 Pages
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ADL5385
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FEATURES
Output frequency range: 50 MHz to 2200 MHz
1 dB output compression: 11 dBm @ 350 MHz
Noise floor: –159 dBm/Hz @ 350 MHz
Sideband suppression: −50 dBc @ 350 MHz
Carrier feedthrough: −46 dBm @ 350 MHz
Single supply: 4.75 V to 5.5 V
24-lead, Pb-free LFCSP_VQ with exposed paddle
APPLICATIONS
Radio-link infrastructure
Cable modem termination systems
Wireless infrastructure systems
Wireless local loop
WiMAX/broadband wireless access systems
PRODUCT DESCRIPTION
The ADL5385 is a silicon, monolithic, quadrature modulator
designed for use from 50 MHz to 2200 MHz. Its excellent phase
accuracy and amplitude balance enable both high performance
intermediate frequency (IF) and direct radio frequency (RF)
modulation for communication systems.
The AD5385 takes the signals from two differential baseband
inputs and modulates them onto two carriers in quadrature
with each other. The two internal carriers are derived from
a single-ended, external local oscillator input signal at twice the
frequency as the desired carrier output. The two modulated
signals are summed together in a differential-to-single-ended
amplifier designed to drive 50 Ω loads.
50 MHz to 2200 MHz
Quadrature Modulator
ADL5385
FUNCTIONAL BLOCK DIAGRAM
ENBL
IBBP
BIAS
TEMPERATURE
SENSOR
TEMP
IBBN
LOIP
LOIN
DIVIDE-BY-2
QUADRATURE
PHASE
SPLITTER
VOUT
QBBP
QBBN
Figure 1.
The ADL5385 can be used as either an IF or a 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.
The ADL5385 is fabricated using the Analog Devices, Inc.,
advanced silicon germanium bipolar process and is packaged in
a 24-lead, Pb-free LFCSP_VQ with exposed paddle.
Performance is specified over –40°C to +85°C. A Pb-free
evaluation board is also available.
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2006 Analog Devices, Inc. All rights reserved.

ADL5385
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............................................................................... 13
Applications..................................................................................... 15
DAC Modulator Interfacing ..................................................... 15
155 Mbps (STM-1) 128 QAM Transmitter............................. 16
CMTS Transmitter Application................................................ 16
Spectral Products from Harmonic Mixing ............................. 17
RF Second-Order Products....................................................... 17
LO Generation Using PLLs ....................................................... 18
Transmit DAC Options ............................................................. 18
Modulator/Demodulator Options ........................................... 18
Evaluation Board ............................................................................ 19
Characterization Setup .................................................................. 21
SSB Setup..................................................................................... 21
Outline Dimensions ....................................................................... 22
Ordering Guide .......................................................................... 22
Rev. 0 | Page 2 of 24


Features www.DataSheet4U.com 50 MHz to 2200 MHz Quadrature Modulator ADL5385 FEATURES O utput frequency range: 50 MHz to 2200 M Hz 1 dB output compression: 11 dBm @ 35 0 MHz Noise floor: –159 dBm/Hz @ 350 MHz Sideband suppression: −50 dBc @ 3 50 MHz Carrier feedthrough: −46 dBm @ 350 MHz Single supply: 4.75 V to 5.5 V 24-lead, Pb-free LFCSP_VQ with exposed paddle FUNCTIONAL BLOCK DIAGRAM ENBL BIAS IBBP TEMPERATURE SENSOR TEMP I BBN APPLICATIONS Radio-link infrastruc ture Cable modem termination systems Wi reless infrastructure systems Wireless local loop WiMAX/broadband wireless acc ess systems LOIP DIVIDE-BY-2 QUADRATUR E PHASE SPLITTER VOUT LOIN QBBP QBBN Figure 1. PRODUCT DESCRIPTION The AD L5385 is a silicon, monolithic, quadrat ure modulator designed for use from 50 MHz to 2200 MHz. Its excellent phase ac curacy and amplitude balance enable bot h high performance intermediate frequen cy (IF) and direct radio frequency (RF) modulation for communication systems. The AD5385 takes the signals f.
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