AD8340-EVALZ datasheet, PDF - EEWORLD Datasheet

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AD8340-EVALZ: DescriptionBOARD EVAL FOR AD8340 VECT MOD; CategoryDevelopment board/suite/development tools; File Size430KB，20 Pages; ManufacturerADI; Websitehttps://www.analog.com; Environmental Compliance

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AD8340-EVALZ Overview

BOARD EVAL FOR AD8340 VECT MOD

AD8340-EVALZ Parametric

Parameter Name	Attribute value
type	Modulator
frequency	700MHz ~ 1GHz
Supporting products/related products	AD8340
What's included	plate

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Data Sheet

FEATURES

Cartesian amplitude and phase modulation

700 MHz to 1.0 GHz frequency range

Continuous magnitude control of −2 dB to −32 dB

Continuous phase control of 0° to 360°

Output third-order intercept 24 dBm

Output 1 dB compression point 11 dBm

Output noise floor −149 dBm/Hz at full gain

Adjustable modulation bandwidth up to 230 MHz

Fast output power disable

4.75 V to 5.25 V single-supply voltage

700 MHz to 1000 MHz

RF Vector Modulator

AD8340

FUNCTIONAL BLOCK DIAGRAM

VPRF

QBBP QBBM

VPS2

90°

RFIP

RFIM

0°

04699-001

RFOP

RFOM

CMOP

IBBP IBBM

DSOP

Figure 1.

APPLICATIONS

RF PA linearization/RF predistortion

Amplitude and phase modulation

Variable attenuators and phase shifters

CDMA2000, GSM/EDGE linear power amplifiers

Smart antennas

GENERAL DESCRIPTION

The

AD8340

vector modulator performs arbitrary amplitude

and phase modulation of an RF signal. Because the RF signal

path is linear, the original modulation is preserved. This part

can be used as a general-purpose RF modulator, a variable

attenuator/phase shifter, or a remodulator. The amplitude can

be controlled from a maximum of −2 dB to less than −32 dB,

and the phase can be shifted continuously over the entire 360°

range. For maximum gain, the

AD8340

delivers an OP1dB

of 11 dBm, an OIP3 of 24 dBm, and an output noise floor of

−149 dBm/Hz, independent of phase. It operates over a fre-

quency range of 700 MHz to 1.0 GHz.

The baseband inputs in Cartesian I and Q format control the

amplitude and phase modulation imposed on the RF input

signal. Both I and Q inputs are dc-coupled with a ±500 mV

differential full-scale range. The maximum modulation band-

width is 230 MHz, which can be reduced by adding external

capacitors to limit the noise bandwidth on the control lines.

Both the RF inputs and outputs can be used differentially or

single-ended and must be ac-coupled. The RF input and output

impedances are nominally 50 Ω over the operating frequency

range. The DSOP pin allows the output stage to be disabled

quickly to protect subsequent stages from overdrive. The

AD8340

operates off supply voltages from 4.75 V to 5.25 V

while consuming approximately 130 mA.

The

AD8340

is fabricated using the Analog Devices, Inc.

proprietary, high performance 25 GHz SOI complementary

bipolar IC process. It is available in a 24-lead RoHS-compliant

LFCSP package and operates over a −40°C to +85°C tempera-

ture range. Evaluation boards are available.

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.

Rev. C

Document Feedback

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Technical Support

www.analog.com

AD8340

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

RF Quadrature Generator ......................................................... 10

I-Q Attenuators and Baseband Amplifiers.............................. 11

Output Amplifier ........................................................................ 11

Data Sheet

Noise and Distortion.................................................................. 11

Gain and Phase Accuracy.......................................................... 11

RF Frequency Range .................................................................. 11

Applications Information .............................................................. 12

Using the AD8340 ...................................................................... 12

RF Input and Matching ............................................................. 12

RF Output and Matching .......................................................... 13

Driving the I-Q Baseband Controls......................................... 13

Interfacing to High Speed DACs .............................................. 14

CDMA2000 Application ........................................................... 14

Evaluation Board ............................................................................ 16

Schematic and Artwork ............................................................. 18

Outline Dimensions ....................................................................... 20

Ordering Guide .......................................................................... 20

REVISION HISTORY

3/14—Rev. B to Rev. C

Added Exposed Pad Notation, Figure 2 and Table 3 ................... 5

Updated Outline Dimensions ....................................................... 20

Changes to Ordering Guide .......................................................... 20

8/07—Rev. A to Rev B

Replaced Pin Configuration and Function

Descriptions Section ........................................................................ 5

Changes to Figure 30 ...................................................................... 12

Changes to Figure 39 ...................................................................... 18

7/07—Rev. 0 to Rev. A

Replaced Pin Configuration and Function

Descriptions Section ........................................................................ 5

Changes to Ordering Guide .......................................................... 20

6/04—Revision 0: Initial Version

Rev. C | Page 2 of 20

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