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DC2566A

P1-P3P4-P6
1
dc2566af
DEMO MANUAL DC2566A
Description
LTC5553
3GHz to 20GHz Passive
Bidirectional Mixer
Demonstration circuit DC2566A is optimized for evaluation
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
10dB Return Loss. The single-ended IF output 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 (V
CC
) ...............................................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 (T
C
) ........ –40°C to 105°C
Junction Temperature (T
J
) .................................... 150°C
Storage Temperature Range .................. –65°C to 150°C
CAUTION: THIS PART IS SENSITIVE TO ELECTRO
-
S
TATIC DISCHARGE (ESD). OBSERVE PROPER ESD
PRECAUTIONS WHEN HANDLING THE LTC5553.
Figure 1. DC2566
2
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
3dB
3dB
SIGNAL
GENERATOR
1
SIGNAL
GENERATOR
2
SPECTRUM
ANALYZER
SIGNAL
GENERATOR
3
POWER
SUPPLY
3.3V DC
+
–
DC2566 F02
6dB
3dB
3dB
3dB
DC2566 F03
SIGNAL
GENERATOR
1
SIGNAL
GENERATOR
2
SPECTRUM
ANALYZER
SIGNAL
GENERATOR
3
POWER
SUPPLY
3.3V DC
+
–
3
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 improves source isolation and helps prevent
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.
• Set the spectrum 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 the ground and V
CC
turrets to the power supply.
BE SURE TO CONNECT THE V
CC
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 V
CC
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.).
P1-P3P4-P6

DC2566A

Mfr. #:
Buy DC2566A
Manufacturer:
Analog Devices Inc.
Description:
DEMO BOARD FOR LTC5553
Lifecycle:
New from this manufacturer.
Delivery:
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