Linear Technology DC2483A-A Quick setup guide

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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
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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.
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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
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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.).
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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
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DEMO MANUAL
DC2483A-A/DC2483A-B
scheMatic DiagraM
5 5
4 4
3 3
2 2
1 1
D D C C B B A A

Vcc
Vcc
Vcc
Vcc
C4 1.2pF
C2 1000pF
L1 3.6nH
L2 3.6nH
R1 0 ohm
C10 10nF
J2
OUT
L3 3.6nH
C8 1000pF
C5 10pF
C9 1000pF
C12 2.2uF
T2
NCS4-442+
MINI-CIRCUITS
5
3 4
1
2
6
J1
IN
C6 1.2pF
L4 1.5nH
E3
EN
U1
LTC5562
LO+
1
LO-
2
EN 3
OUT+ 4
OUT- 5
Vcc 6
GND 7
IN-
8
IN+
9
LGND
10
GND
11
J3
LO
C1 1000pF
C3 1000pF
C7 1.2pF
C11
10nF
T1
TC1-1-13M+
6 4
1 2 3
E2
Vcc
E1
GND
Figure 5. DC2483A-A Upconverter Schematic
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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
5 5
4 4
3 3
2 2
1 1
D D C C B B A A

Vcc
Vcc
J103
LO
T102 TC8-1-10LN+ MINI-CIRCUITS
6 4
1 2 3
C102 1000pF
C112 10nF
E103
EN
C108 OPT 0603
C106 1000pF
J102
OUT
C101 1000pF
C107 OPT 0603
T101
TC1-1-13M+
6 4
1 2 3
L102 100nH
C113 2.2uF
R101 0 ohm
U101
LTC5562
LO+
1
LO-
2
EN 3
OUT+ 4
OUT- 5
Vcc 6
GND 7
IN-
8
IN+
9
LGND
10
GND
11
J101
IN
L103 100nH
C109 0 Ohm
E102
Vcc
L101
7.5nH
C111 10nF C110
0 Ohm
E101
GND
C104 1000pF
C105 OPT
C103 TBD
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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
Copyright © 2004, Linear Technology Corporation
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