Linear Technology DC2566A Guida rapida alla configurazione

dc2566af

DEMO MANUAL DC2566A

Description

LTC5553

3GHz to 20GHz Passive

Bidirectional Mixer

DemonstrationcircuitDC2566Aisoptimizedforevaluation

of the LT C

5553 passive double-balanced mixer. Its RF

port is broadband matched from 3GHz to 20GHz, and the

internal LO amplifier, requiring only a 0dBm drive level,

is broadband matched to 50Ω from 1GHz to 20GHz with

10dBReturn Loss.Thesingle-ended IFoutput is broadband

matched from 500MHz to 9GHz. The LTC5553 can be

used for upconverting and downconverting applications.

Design files for this circuit board are available at

http://www.linear.com/demo/DC2566A

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

Absolute MAxiMuM input

rAtings

boArD photo

Supply Voltage (VCC)...............................................4.0V

Enable Input Voltage (EN) .................–0.3V to VCC+0.3V

LO Input Power (1GHz to 12GHz).........................10dBm

LO Input DC Voltage............................................... ±0.1V

RF Power (3GHz to 20GHz)..................................20dBm

RF DC Voltage........................................................ ±0.1V

IF Power (0.5GHz to 9GHz)..................................20dBm

IF DC Voltage ......................................................... ±0.1V

Operating Temperature Range (TC)........ –40°C to 105°C

Junction Temperature (TJ).................................... 150°C

Storage Temperature Range .................. –65°C to 150°C

CAUTION: THIS PART IS SENSITIVE TO ELECTRO-

STATIC DISCHARGE (ESD). OBSERVE PROPER ESD

PRECAUTIONS WHEN HANDLING THE LTC5553.

Figure 1. DC2566

dc2566af

DEMO MANUAL DC2566A

proper test setups

Figure 2. Test Setup for Downconverting Mixer Two-Tone Measurements

Figure 3. Test Setup for Upconverting Mixer Two-Tone Measurements

6dB

3dB

SIGNAL

GENERATOR

SIGNAL

GENERATOR

SPECTRUM

ANALYZER

SIGNAL

GENERATOR

POWER

SUPPLY

3.3V DC

–

DC2566 F02

6dB

3dB

DC2566 F03

SIGNAL

GENERATOR

SIGNAL

GENERATOR

SPECTRUM

ANALYZER

SIGNAL

GENERATOR

POWER

SUPPLY

3.3V DC

–

dc2566af

DEMO MANUAL DC2566A

notes on test equipMent setup

•High performance signal generators with low harmonic

outputs should be used for 2-tone measurements. Oth-

erwise, low-pass filters at the signal generator outputs

should be used to suppress harmonics.

•High quality combiners should be used to present a

broadband 50Ω termination on all ports as well as

provide good port-to-port isolation. Adding attenuator

pads further improvessourceisolation and helpsprevent

the signal generators from producing intermodulation

products.

•Spectrum analyzers can produce significant internal

distortion products if they are overdriven. Generally,

spectrum analyzers are designed to operate at their

best with about –30dBm to –40dBm at their input. The

spectrum analyzer’s input attenuation setting should be

used to avoid saturating the instrument.

•Setthespectrum analyzer’s input attenuation depending

on the spectrum analyzer used.

•Before performing measurements on the DUT, the sys-

tem performance should be evaluated to ensure that

a clean input signal is obtained and that the spectrum

analyzer’s internal distortion is minimized.

quick stArt proceDure

1. Connect all test equipment as shown in Figure 2.

2. Set the power supply output voltage to 3.3V and set

the current limit to 200mA.

3. Connect theground and VCC turrets tothepower supply.

BE SURE TO CONNECT THE VCC TURRET BEFORE

THE EN TURRET TO ENSURE THAT THE PART DOES

NOT GET DAMAGED.ALSO, REMOVE POWER FROM

EN TURRET BEFORE REMOVING POWER FROM

THE VCC TURRET.

4. Connect the EN turret to the power supply.

5. Set the LO signal generator to provide a 7910MHz CW

signal at about 0dBm to the demo board’s LO port.

6. Set the RF signal generators to provide one 9799MHz

CW signal and one 9801MHz CW signal. The signals

should be applied to the 2-way combiner. The output

of the combiner should be applied to the demo board’s

RF input port. The two tones should be set to 5dBm

each at the mixer’s RF input port.

7. Set the spectrum analyzer’s center frequency to

1890MHz.

8. Perform various measurements (Conversion Gain,

OIP3, LO leakage, etc.).

dc2566af

DEMO MANUAL DC2566A

pArts list

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 2 C1,C2 CAP., 18pF, C0G, 50V, 1%, 0402 MURATA, GJM1555C1H180FB01

2 1 C3 CAP., 1µF, X7R, 10V, 10%, 0603 MURATA, GRM188R71A105KA61

3 3 E1-E3 TEST POINT, TURRET, 0.061" MTG. HOLE MILL-MAX, 2308-2-00-80-00-00-07-0

4 2 J1, J2 CONN., SMA 50Ω EDGE-LAUNCH E. F. JOHNSON, 142-0761-881

5 1 J3 CONN., SMA 50Ω EDGE-LAUNCH E. F. JOHNSON, 142-0701-851

6 1 U1 I.C. LTC5553IUDB, QFN 12 PIN, 3mm x 2mm LINEAR TECHNOLOGY, LTC5553IUDB#PBF

dc2566af

DEMO MANUAL DC2566A

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-

tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

scheMAtic DiAgrAM

D D

C C

B B

A A

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

dc2566af

DEMO MANUAL DC2566A

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ●FAX: (408) 434-0507 ●www.linear.com

LT 0117 • PRINTED IN USA

DEMONSTRATION BOARD IMPORTANT NOTICE

Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:

This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT

OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete

in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety

measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union

directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.

If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date

of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU

OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS

FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR

ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims

arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all

appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or

agency certified (FCC, UL, CE, etc.).

No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance,

customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.

LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.

Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and

observe good laboratory practice standards. Common sense is encouraged.

This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application

engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

X-ON Electronics

Largest Supplier of Electrical and Electronic Components

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