Linear Technology DC2460A Quick setup guide

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DEMO MANUAL DC2460A
DESCRIPTION ABSOLUTE MAXIMUM
INPUT RATINGS
LTC5566
300MHz to 6GHz Dual Programmable
Gain Downconverting Mixer
Demonstration circuit 2460A is optimized for evaluation
of the LT C
®
5566 dual programmable gain downconverting
mixer. Each channel incorporates an active mixer and a
digital IF VGA with 15.5dB gain control range. The IF gain
of each channel is independently programmable through
the SPI in 0.5dB steps. Its single-ended RF ports are tun-
able via the SPI or parallel control lines and have a range
from 300MHz to 6GHz. The LO port is always matched to
50Ω from 150MHz to 6GHz with 10dB return loss. The
differential IF port is usable from 1MHz to 500MHz. There
is a reduced power mode available through the SPI, which
lowers the total current consumption by 25%.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2460A
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.
BOARD LAYOUT
Figure 1. DC2460A
Supply Voltage
(VDD, VCC1, VCC2, IF1+, IF1–, IF2+, IF2–)..................4V
EN1, EN2, T0, T1 Input Voltages ......–0.3V to VCC + 0.3V
LO+, LO–Input Power (150MHz to 6GHz).......... +10dBm
RF1, RF2 Input Power (300MHz to 6GHz)..........+20dBm
LO+, LO–Input DC Voltage.....................................±0.5V
IF DVGA Peak Differential Input Voltage....................±4V
SDI, CLK, CSB, PS Input Voltages.... –0.3V to VDD +0.3V
SDO Output Current............................................. ±10mA
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 precautions when handling
the LTC5566.

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DEMO MANUAL DC2460A
PROPER TEST SETUP
Figure 2. Test Setup for Downconverting Mixer 2-Tone Measurement
180°
0°

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DEMO MANUAL DC2460A
NOTES ON TEST EQUIPMENT AND SETUP
n 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.
n 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 helps prevent
the signal generators from producing intermodulation
products.
n 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.
n Setthe spectrum analyzer’s input attenuation depending
on the spectrum analyzer used.
n 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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DEMO MANUAL DC2460A
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 500mA.
3. Connect the ground and VCC turrets to the power 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 2753MHz CW
signal at about 0dBm to the demo board’s LO port.
6. Set the RF signal generators to provide one 2599MHz
CW signal and one 2601MHz 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
RF1 input port. The two tones should be set to –8dBm
each at the mixer’s RF1 input port.
7. Set the spectrumanalyzer’scenter frequency to 153MHz
with a span of 10MHz. Combine the DC2460A IF1+
and IF1–Outputs using a 180° combiner. Connect the
combiner’s output to the spectrum analyzer.
8.Performvariousmeasurements(Conversion Gain, OIP3,
LO leakage, etc.

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DEMO MANUAL DC2460A
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 2 C1, C2 CAP., 4.3pF, C0G, 50V, ±0.1pF, 0402 Murata, GJM1555C1H4R3BB01
2 6 C3, C4, C102-C105 CAP., 2.2pF, C0G, 50V, ±0.1pF, 0402 Murata, GJM1555C1H2R2BB01
3 4 C5-C8 CAP., 1000pF, X7R, 50V, 10%, 0201 Murata, GRM033R71H102KA12
4 8 C9-C16 CAP., 10nF, X7R, 50V, 10%, 0402 Murata, GRM155R71H103KA88
5 1 C17 CAP., 0.3pF, C0G, 25V, ±0.05pF, 0201 Murata, GRM0335C1HR30WA01
6 2 C18, C19 CAP., 1µF, X5R, 50V, 10%, 0603 Murata, GRM188R61H105KAAL
7 2 C101, C106 CAP., 0.1µF, X7R, 50V, 10%, 0402 Murata, GRM155R71H104KE14
8 5 E1-E5 TEST POINT, TURRET, .064 MTG. HOLE MILL-MAX,2308-2-00-80-00-00-07-0
9 4 JP1-JP4 JMP, 3PIN 1 ROW .079CC SAMTEC, TMM-103-02-L-S
10 1 JP101 HEADER, 2 ×7PIN, 0.079CC MOLEX, 87831-1420
11 7 J1-J7 CON., SMA, 50Ω, EDGE-LANCH EF JOHNSON, 142-0701-851
12 8 L1-L4, L11-L14 IND., 680nH, 5%, 0603 COILCRAFT, 0603AF-681XJE
13 4 L5-L8 IND., 47nH, 2%, 0402 COILCRAFT, 0402HP-47NXGL
14 2 L9, L10 DNI DNI
15 4 L15-L18 IND., 33nH, 2%, 0402 COILCRAFT, 0402HP-33NXGL
16 2 R101, R107 RES., 200k, 1%, 0402 Vishay, CRCW0402200KFKED
17 5 R102-R106 RES., 1k, 1%, 0402 Vishay, CRCW04021K00FKED
18 3 R108-R110 DNI DNI
19 2 T1, T2 DNI DNI
20 1 U1 300MHz to 6GHz Dual Programmable Gain
Downconverting Mixer
Linear Tech., LTC5566IUH#PBF
21 1 U101 DNI DNI
22 1 U102 Dual Supply Translating Transciever, 3-state NXP, 74LVC1T45GW
23 2 U103,U104 Dual Buffer with 3-state output FAIRCHILD, NC7WZ17P6X
24 1 CABLE ASSY., 8" STRIP LINEAR RIBBON CABLE CA-2440

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DEMO MANUAL DC2460A
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D D C C B B A A
 



 


 
   




 



  

 

 

  




 
 

  
 



  
  


U1
LTC5566IUH


































 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 




 
 
 
 
  
 
 
 


  
 
 
 
 
     




 
 
  

 


  
 
  
 
 



 
 
  
 
 
 



 

  

 


 
 

Figure 3. DC2460A Schematic Page 1

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DEMO MANUAL DC2460A
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
DNI DNI DNI
DNI
Figure 4. DC2460A Schematic Page 2

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DEMO MANUAL DC2460A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ●FAX: [phone] ●www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2016
LT 0816 • 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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