AD9776 datasheet, PDF - EEWORLD Datasheet

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AD9776: Description400 mhz to 6 ghz broadband quadrature modulator; Categorysemiconductor Discrete semiconductor; File Size1MB，32 Pages; ManufacturerADI; Websitehttps://www.analog.com; Environmental Compliance

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400 mhz to 6 ghz broadband quadrature modulator

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400 MHz to 6 GHz

Broadband Quadrature Modulator

ADL5375

FEATURES

Output frequency range: 400 MHz to 6 GHz

1 dB output compression: ≥9.4 dBm from 450 MHz to 4 GHz

Output return loss ≤ 14 dB from 450 MHz to 5.5 GHz

Noise floor: −160 dBm/Hz @ 900 MHz

Sideband suppression: <−50 dBc @ 900 MHz

Carrier feedthrough: <−46 dBm @ 900

MHz

Baseband input bias level

ADL5375-05: 500 mV

ADL5375-15: 1500 mV

Single supply: 4.75 V to 5.25 V

24-lead LFCSP_VQ package

FUNCTIONAL BLOCK DIAGRAM

IBBP

IBBN

ADL5375

LOIP

LOIN

QUADRATURE

PHASE

SPLITTER

RFOUT

DSOP

QBBN

QBBP

07052-001

Figure 1.

APPLICATIONS

Cellular communication systems

GSM/EDGE, CDMA2000, W-CDMA, TD-SCDMA

WiMAX/broadband wireless access systems

Satellite modems

GENERAL DESCRIPTION

The ADL5375 is a broadband quadrature modulator designed for

operation from 400 MHz to 6 GHz. Its excellent phase accuracy

and amplitude balance enable high performance intermediate

frequency or direct radio frequency modulation for commu-

nication systems.

The ADL5375 features a broad baseband bandwidth, along

with an output gain flatness that varies no more than 1 dB

from 450 MHz to 3.8 GHz. These features, coupled with a broad-

band output return loss of ≤−14 dB, make the ADL5375 ideally

suited for broadband zero IF or low IF-to-RF applications,

broadband digital predistortion transmitters, and multiband

radio designs.

The ADL5375 accepts two differential baseband inputs and

a single-ended LO. It generates a single-ended 50 Ω output.

The two versions offer input baseband bias levels of 500 mV

(ADL5375-05) and 1500 mV (ADL5375-15).

The ADL5375 is fabricated using an advanced silicon-germanium

bipolar process. It is available in a 24-lead, exposed paddle, Pb-free,

LFCSP_VQ package. Performance is specified over a −40°C to

+85°C temperature range. 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.

Trademarks and registered trademarks are the property of their respective owners.

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

ADL5375

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications ....................................................................................... 1

Functional Block Diagram .............................................................. 1

General Description ......................................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

Absolute Maximum Ratings............................................................ 7

ESD Caution .................................................................................. 7

Pin Configuration and Function Descriptions ............................. 8

Typical Performance Characteristics ............................................. 9

ADL5375-05 .................................................................................. 9

ADL5375-15 ................................................................................ 14

Theory of Operation ...................................................................... 19

Circuit Description..................................................................... 19

Basic Connections .......................................................................... 20

Power Supply and Grounding ................................................... 20

Baseband Inputs.......................................................................... 20

LO Input ...................................................................................... 20

RF Output .................................................................................... 20

Output Disable ............................................................................ 21

Optimization ................................................................................... 22

Applications Information .............................................................. 23

DAC Modulator Interfacing ..................................................... 23

Using the AD9779 Auxiliary DAC for Carrier Feedthrough

Nulling ......................................................................................... 24

GSM/EDGE Operation ............................................................. 25

W-CDMA Operation................................................................. 25

LO Generation Using PLLs ....................................................... 26

Transmit DAC Options ............................................................. 26

Modulator/Demodulator Options ........................................... 26

Evaluation Board ............................................................................ 27

Thermal Grounding and Evaluation Board Layout............... 28

Characterization Setup .................................................................. 29

Outline Dimensions ....................................................................... 31

Ordering Guide .......................................................................... 31

REVISION HISTORY

12/07—Revision 0: Initial Version

Rev. 0 | Page 2 of 32

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