Analog Devices Linear Technology DC2483A-B Guida rapida alla configurazione

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dc2483aabf

DEMO MANUAL

DC2483A-A/DC2483A-B

DESCRIPTION

LTC5562

Wideband Low Power

Active Mixer

The LT C

5562 is a versatile low power mixer optimized

for applications requiring very wide input bandwidth, low

distortion, and low LO leakage. This mixer can be used

for either upconverting or downconverting applications,

and provides a nominal conversion gain of 1dB. Demon-

stration circuit 2483A-A showcases the LTC5562 mixer

for upconverting applications while demonstration circuit

2483A-B is tuned for downconverting applications. The

differential inputs are optimized for use with 1:1 trans-

mission-line baluns, allowing very wideband impedance

matching. The LTC5562 uses a 3.3V supply for low power

consumption and an enable pin allows the part to be shut L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog

Devices, Inc. All other trademarks are the property of their respective owners.

BOARD PHOTO

down for further power savings. The total mixer current

is adjustable, allowing for even further power savings.

The standard match frequency ranges for each board are

outlined in the table below.

DEMO BOARD INPUT RANGE LO RANGE OUTPUT RANGE

DC2483A-A 30MHz to 3GHz 2.8GHz to 3.4GHz 3.3GHz to 3.7GHz

DC2483A-B 30MHz to 3GHz 0.4GHz to 1.4GHz 10MHz to 550MHz

Design files for this circuit board are available at

http://www.linear.com/demo/DC2483A-A

Figure 1. DC2483A-A

ABSOLUTE MAXIMUM INPUT RATINGS

Supply Voltage (VCC, OUT+, OUT–)..............................4V

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

LO+, LO–Input Power (1GHz to 7GHz).................10dBm

IN+, IN–Power (10MHz to 7GHz)..........................15dBm

LGND Voltage............................................... –0.3V to 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 ELECTROSTATIC

DISCHARGE (ESD). OBSERVE PROPER ESD PRECAU-

TIONS WHEN HANDLING THE LTC5562.

Figure 2. DC2483A-B

dc2483aabf

DEMO MANUAL

DC2483A-A/DC2483A-B

NOTES ON TEST EQUIPMENT SETUP

•High performance signal generators with low harmonic

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

erwise, lowpass 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 attenua-

tor pads further improves source isolation and helps

prevent the signal generators from producing inter-

modulation 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.

•Set the spectrum analyzer’s input attenuation depend-

ing 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.

dc2483aabf

DEMO MANUAL

DC2483A-A/DC2483A-B

PROPER TEST SETUPS

Figure 3. DC2483A-A Upconverter Two-Tone Test Setup

Figure 4. DC2483A-B Downconverter Two-Tone Test Setup

dc2483aabf

DEMO MANUAL

DC2483A-A/DC2483A-B

1. Connect all test equipment as shown in Figure 3.

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

the current limit to 60mA.

3. Connect the ground and VCC turrets to the power sup-

ply.

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.

QUICK START PROCEDURE (DC2483A-A)

5. Set the LO signal generator to provide a 3360MHz CW

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

6. Set the RF signal generators to provide one 239MHz

CW signal and one 241MHz 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 –12dBm

each at the mixer’s RF input port.

7. Set the spectrum analyzer’s center frequency to

3600MHz.

8. Perform various measurements (conversion gain,

OIP3, LO leakage, etc.).

1. Connect all test equipment as shown in Figure 4.

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

the current limit to 60mA.

3. Connect the ground and VCC turrets to the power sup-

ply.

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.

QUICK START PROCEDURE (DC2483A-B)

5. Set the LO signal generator to provide a 1040MHz CW

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

6. Set the RF signal generators to provide one 899MHz

CW signal and one 901MHz 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 –12dBm

each at the mixer’s RF input port.

7. Set the spectrum analyzer’s center frequency to

140MHz.

8. Perform various measurements (conversion gain,

OIP3, LO leakage, etc.).

dc2483aabf

DEMO MANUAL

DC2483A-A/DC2483A-B

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

DC2483A-A Required Circuit Components

1 5 C1-C3, C8, C9 CAP., 1000pF, X7R, 50V, 10%, 0402 MURATA GRM155R71H102KA01D

2 3 C4, C6, C7 CAP., 1.2pF, C0G, 50V, ±0.25pF, 0402 MURATA GJM1555C1H1R2CB01D

3 1 C5 CAP., 10pF, C0G, 50V, 5%, 0402 MURATA GRM1555C1H100JA01D

4 2 C10, C11 CAP., 10nF, X7R, 50V, 10%, 0402 MURATA GRM155R71H103KA88D

5 1 C12 CAP., 2.2µF, X5R, 10V, 10%, 0603 MURATA GRM188R61A225KE34D

6 3 E1, E2, E3 TEST POINT, TURRET, 0.064", MTG. HOLE MILL-MAX 2308-2-00-80-00-00-07-0

7 3 J1-J3 CONN., SMA, 50Ω EDGE-LAUNCH CINCH CONNECTIVITY 142-0701-851

8 3 L1-L3 IND., 3.6nH, 2%, 0402, WIRE-WOUND COILCRAFT 0402HP-3N6XGLW

9 1 L4 IND., 1.5nH, ±0.3nH, 0402, MULTILAYER MURATA LQG15HS1N5S02D

10 1 R1 RES., 0Ω JUMPER, 0402 VISHAY CRCW04020000Z0ED

11 1 T1 XFMR, 1:1, 4.5MHz to 3000MHz MINI-CIRCUITS TC1-1-13M+

12 1 T2 XFMR, 4:1, 3300MHz to 4200MHz MINI-CIRCUITS NCS4-442+

13 1 U1 IC, LTC5562IUC, QFN 10-PIN, 2mm × 2mm LINEAR TECH LTC5562IUC#PBF

DC2483A-B Required Circuit Components

1 4 C1, C2, C4, C6 CAP., 1000pF, X7R, 50V, 10%, 0402, SINGLE SOURCE ONLY MURATA, GRM155R71H102KA01D

2 2 C3, C5 CAP., OPTION, 0402 DNI

3 2 C7, C8 CAP., OPTION, 0603 DNI

4 3 C9, C10, R1 RES., 0Ω JUMPER, 0402 VISHAY, CRCW04020000Z0ED

5 2 C11, C12 CAP., 10nF, X7R, 50V, 10%, 0402, SINGLE SOURCE ONLY MURATA, GRM155R71H103KA88D

6 1 C13 CAP., 2.2µF, X5R, 10V, 10%, 0603, SINGLE SOURCE ONLY MURATA, GRM188R61A225KE34D

7 3 E1, E2, E3 TEST POINT, TURRET, 0.064", MTG. HOLE MILL-MAX, 2308-2-00-80-00-00-07-0

8 3 J1, J2, J3 CONN., SMA, 50Ω EDGE-LAUNCH CINCH CONNECTIVITY, 142-0701-851

9 1 L1 IND., 7.5nH, 2%, 0402, WIRE-WOUND COILCRAFT, 0402HP-7N5XGLW

10 2 L2, L3 IND., 100nH, 5%, 0402, WIRE-WOUND COILCRAFT, 0402AF-101XJL

11 1 T1 XFMR, 1:1, 4.5MHz to 3000MHz MINI-CIRCUITS, TC1-1-13M+

12 1 T2 XFMR, 8:1, 2MHz to 500MHz MINI-CIRCUITS, TC8-1-10LN+

13 1 U1 IC, LTC5562IUC, QFN 10-PIN, 2mm × 2mm LINEAR TECH, LTC5562IUC#PBF

dc2483aabf

DEMO MANUAL

DC2483A-A/DC2483A-B

SCHEMATIC DIAGRAM

D D

C C

B B

A A



Vcc

1.2pF

1000pF

3.6nH

0 ohm

C10

10nF

OUT

3.6nH

1000pF

10pF

1000pF

C12

2.2uF

NCS4-442+

MINI-CIRCUITS

1.2pF

1.5nH

LTC5562

LO+

LO-

EN 3

OUT+ 4

OUT- 5

Vcc 6

GND 7

IN-

IN+

LGND

GND

1000pF

1.2pF

C11

10nF

TC1-1-13M+

Vcc

GND

Figure 5. DC2483A-A Upconverter Schematic

dc2483aabf

DEMO MANUAL

DC2483A-A/DC2483A-B

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

Figure 6. DC2483A-B Downconverter Schematic

D D

C C

B B

A A



Vcc

J103

T102

TC8-1-10LN+

MINI-CIRCUITS

C102

1000pF

C112

10nF

E103

C108

OPT

0603

C106

1000pF

J102

OUT

C101

1000pF

C107

OPT

0603

T101

TC1-1-13M+

L102

100nH

C113

2.2uF

R101

0 ohm

U101

LTC5562

LO+

LO-

EN 3

OUT+ 4

OUT- 5

Vcc 6

GND 7

IN-

IN+

LGND

GND

J101

L103

100nH

C109

0 Ohm

E102

Vcc

L101

7.5nH

C111

10nF C110

0 Ohm

E101

GND

C104

1000pF

C105

OPT

C103

TBD

dc2483aabf

DEMO MANUAL

DC2483A-A/DC2483A-B

 LINEAR TECHNOLOGY CORPORATION 2017

LT 0717 • 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

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