DC2322A - Demo Manual

DEMO MANUAL DC2322A
LTC5576
3GHz to 8GHz High Linearity
Active Upconverting Mixer
Description
Absolute Maximum Ratings
Demonstration circuit 2322A is designed for evaluation
of the LTC®5576 active upconverting mixer with very
wide input bandwidth and low distortion. Its OUT port
is optimized for 4GHz to 6GHz applications, but is easily
retuned for output frequencies as low as 3GHz, or as high
as 8GHz with minor performance degradation. The IN port
is optimized for 30MHz to 6GHz operation while the LO
port is always 50Ω matched from 1GHz to 8GHz.
Supply Voltage (VCC)................................................6.0V
Enable Input Voltage (EN)................ −0.3V to VCC + 0.3V
IADJ Pin Voltage........................................−0.3V to 2.7V
LO Port Power (1GHz to 8GHz)........................... +10dBm
IN Port Power (30MHz to 6GHz)......................... +15dBm
TEMP Input Current................................................10mA
Operating Temperature Range (TC).........−40°C to 105°C
Junction Temperature (TJ)..................................... 150°C
Storage Temperature Range...................−65°C to 150°C
The LTC5576 is optimized for 5V operation, but can be
used with a 3.3V supply with slightly reduced performance.
The enable function allows the part to be easily shut down
for further power savings.
CAUTION: This part is sensitive to electrostatic discharge
(ESD). Observe proper ESD precautions when handling
the LT5576.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2322A
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.
Proper Test Setup
Figure 1. Test Setup for Mixer Two-Tone Measurements
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DEMO MANUAL DC2322A
Notes on Test Equipment and Setup
n
n
n
High performance signal generators with low harmonic
outputs should be used for 2-tone measurements. Otherwise, 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
improves source isolation and helps prevent the signal
generators from producing intermodulation products.
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
n
Spectrum analyzers can produce significant internal
distortion products if they are overdriven. Generally,
Set the spectrum analyzer’s input attenuation depending
on the spectrum analyzer used.
Before performing measurements on the DUT, the
system 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 1.
2. Set the power supply output voltage to 5V, and set the
current limit to 150mA.
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 4900MHz 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 IN port. The two
tones should be set to –10dBm each at the mixer’s IN port.
7. Set the spectrum analyzer’s center frequency to 5.8GHz.
8. Perform various measurements (Conversion Gain,
OIP3, LO leakage, etc.)
Parts List
ITEM
2
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
MURATA, GRM1555C1H102JA01
1
2
C1, C2
CAP., 1000pF, C0G, 50V, 5%, 0402
2
0
C3
DNI, 0402
3
1
C4
CAP., 100pF, C0G, 50V, 5%, 0402
MURATA, GRM1555C1H101JA01
4
1
C5
CAP., 0.3pF, C0G, 50V, ±0.05pF, 0402
AVX, 04021J0R3ZBS
5
1
C6
CAP., 0.2pF, C0G, 50V, ±0.05pF, 0402
AVX, 04021J0R2ZBS
6
1
C7
CAP., 0.01μF, X7R, 50V, 10%, 0402
MURATA, GRM155R71H103KA88
7
1
C8
CAP., 1μF, X7R,10V,10%, 0603
MURATA, GRM188R71A105KA61
8
4
E1-E4
TEST POINT, TURRET, .064 MTG. HOLE
MILL-MAX,2308-2-00-80-00-00-07-0
9
3
J1-J3
CON., SMA, 50Ω, EDGE-LANCH
E.F. JOHNSON, 142-0701-851
10
2
L1, L2
RES., 0Ω, 0402
VISHAY, CRCW04020000Z0ED
11
1
R1
RES., 2.61k, 1/16W, 1%, 0402
VISHAY, CRCW04022K61FKED
12
1
T1
TRANS., 50Ω, 4.5MHz – 3000MHz, TC1-1-13M+
MINI CIRCUITS, TC1-1-13M+
13
1
U1
IC., HIGH DYNAMIC RANGE ACTIVE MIXER
LINEAR TECH., LTC5576IUF
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DEMO MANUAL DC2322A
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Figure 2: High Linearity Active Upconverting Mixer Schematic
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Schematic Diagram
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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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
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DEMO MANUAL DC2322A
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
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ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
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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,
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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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Linear Technology Corporation
LT 0915 REV A • PRINTED IN USA
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