IIP3 (dBm), SSB NF (dB)
LTC5543
2.3GHz to 4GHz
High Dynamic Range
Downconverting Mixer
FEATURES DESCRIPTION
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Conversion Gain: 8.4dB at 2500MHz
The LTC 5543 is part of a family of high dynamic range, high
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IIP3: 24.5dBm at 2500MHz
gain passive downconverting mixers covering the 600MHz to
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Noise Figure: 10.2dB at 2500MHz
4GHz frequency range. The LTC5543 is optimized for 2.3GHz
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17.5dB NF Under +5dBm Blocking
to 4GHz RF applications. The LO frequency must fall within
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High Input P1dB
the 2.4GHz to 3.6GHz range for optimum performance. A
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3.3V Supply, 660mW Power Consumption
typical application is a LTE or WiMAX receiver with a 2.3GHz
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Shutdown Pin
to 2.7GHz RF input and high-side LO.
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50 Single-Ended RF and LO Inputs
The LTC5543 is designed for 3.3V operation, however; the
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LO Inputs 50 Matched when Shutdown
IF ampli er can be powered by 5V for the highest P1dB.
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High Isolation LO Switch
An integrated SPDT LO switch with fast switching accepts
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0dBm LO Drive Level
two active LO signals, while providing high isolation.
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High LO-RF and LO-IF Isolation
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The LTC5543s high conversion gain and high dynamic
Small Solution Size
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range enable the use of lossy IF lters in high-selectivity
20-Lead (5mm 5mm) QFN package
receiver designs, while minimizing the total solution cost,
APPLICATIONS
board space and system-level variation.
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Wireless Infrastructure Receivers High Dynamic Range Downconverting Mixer Family
(LTE, WiMAX, WCS)
PART# RF RANGE LO RANGE
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Point-To-Point Microwave Links
LTC5540 600MHz 1.3GHz 700MHz 1.2GHz
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High Dynamic Range Downmixer Applications
LTC5541 1.3GHz 2.3GHz 1.4GHz 2.0GHz
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
LTC5542 1.6GHz 2.7GHz 1.7GHz 2.5GHz
Technology Corporation. All other trademarks are the property of their respective owners.
LTC5543 2.3GHz 4GHz 2.4GHz 3.6GHz
TYPICAL APPLICATION
Wideband Receiver
Wideband Conversion Gain, IIP3
190MHz 190MHz and NF vs IF Output Frequency
1nF
SAW BPF
V IF
CCIF
1nF
ADC 9.0 26
AMP
3.3V or 5V
22pF 150nH 150nH
1F
8.9 24
IIP3
f = 2725MHz
LO
+ 8.8 22
P = 0dBm
LO
IF IF
RF = 2535 35MHz
2.7pF
8.7 20
TEST CIRCUIT IN FIGURE 1
LO2
LTC5543
IMAGE SYNTH 2
IF
8.6 18
BPF
1.2nH
RF
RF 8.5 16
ALTERNATE LO FOR
2500MHz LNA
G
C
FREQUENCY-HOPPING
8.4 14
TO
LO
0.8pF
2570MHz
8.3 12
2.7pF
8.2 10
SHDN
BIAS
NF
SYNTH 1
SHDN
(0V/3.3V)
LO1 8.1 8
V V V LOSEL
CC2 CC1 CC3
LO 8.0 6
155 165 175 185 195 205 215 225
2725MHz
V 3.3V
CC
LO SELECT
1F 22pF IF OUTPUT FREQUENCY (MHz)
(0V/3.3V)
5543 TA02
5543 TA01
5543f
1
G (dB)
CLTC5543
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION
(Note 1)
TOP VIEW
Mixer Supply Voltage (V , V )...........................3.8V
CC1 CC2
LO Switch Supply Voltage (V ).............................3.8V
CC3
+
IF Supply Voltage (IF , IF ) ......................................5.5V
20 19 18 17 16
Shutdown Voltage (SHDN) ................0.3V to V +0.3V
CC
NC 1 15 LO2
LO Select Voltage (LOSEL) ................0.3V to V +0.3V
CC
RF 2 14 V
CC3
LO1, LO2 Input Power (2GHz to 4GHz) ..................9dBm
21
CT 13 GND
3
GND
LO1, LO2 Input DC Voltage ....................................0.5V
GND
GND 4 12
RF Input Power (2GHz to 4GHz) ...........................15dBm
SHDN 5 11 LO1
RF Input DC Voltage ............................................... 0.1V
6 7 8 9 10
Operating Temperature Range .................40C to 85C
Storage Temperature Range .................. 65C to 150C
Junction Temperature (T ) .................................... 150C
J
UH PACKAGE
20-LEAD (5mm s 5mm) PLASTIC QFN
T = 150C, = 34C/W, = 3C/W
JMAX JA JC
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC5543IUH#PBF LTC5543IUH#TRPBF 5543 20-Lead (5mm x 5mm) Plastic QFN 40C to 85C
Consult LTC Marketing for parts speci ed with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based nish parts.
For more information on lead free part marking, go to: