IIP3 (dBm)
LTC5540
600MHz to 1.3GHz
High Dynamic Range
Downconverting Mixer
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Conversion Gain: 7.9dB at 900MHz
The LTC 5540 is part of a family of high dynamic range, high
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IIP3: 25.9dBm at 900MHz
gain passive downconverting mixers covering the 600MHz
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Noise Figure: 9.9dB at 900MHz
to 4GHz frequency range. The LTC5540 is optimized for
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16.2dB NF Under +5dBm Blocking
0.6GHz to 1.3GHz RF applications. The LO frequency
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High Input P1dB
must fall within the 0.7GHz to 1.2GHz range for optimum
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3.3V Supply, 640mW Power Consumption
performance. A typical application is a LTE or GSM receiver
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Shutdown Pin
with a 700MHz to 915MHz RF input and high-side LO.
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50 Single-Ended RF and LO Inputs
The LTC5540 is designed for 3.3V operation, however; the
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LO Inputs 50 Matched when Shutdown
IF amplifier 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 LTC5540s high conversion gain and high dynamic
Small Solution Size
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range enable the use of lossy IF filters in high-selectivity
20-Lead (5mm 5mm) QFN package
receiver designs, while minimizing the total solution cost,
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board space and system-level variation.
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Wireless Infrastructure Receivers
High Dynamic Range Downconverting Mixer Family
(LTE, GSM, W-CDMA)
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
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Wideband Receiver
Wideband Conversion Gain, IIP3
190MHz 190MHz
1nF
and NF vs RF Input Frequency
SAW BPF
V IF
CCIF
1nF 16 28
ADC
AMP
3.3V or 5V
150nH 150nH
22pF
1F
15 27
14 26
+
1.5pF IF IF
100pF
13 25
CT IIP3
T = +25C
LO2 A
LTC5540
SYNTH 2
IF 12 24
f = 190MHz
IF
5.6pF
f = f + f
LO RF IF
RF
11 23
RF
NF
ALTERNATE LO FOR
700MHz LNA
FREQUENCY-HOPPING
10 22
TO
LO
IMAGE
915MHz
9 21
BPF
100pF
8 G 20
C
SHDN
BIAS
SYNTH 1
SHDN
(0V/3.3V)
7 19
LO1
V V V LOSEL
CC2 CC1 CC3
LO 6 18
600 700 800 900 1000
1090MHz
V 3.3V
CC
LO SELECT
1F 22pF RF FREQUENCY (MHz)
(0V/3.3V)
5540 TA01
5540 TA01a
5540f
G (dB), NF (dB)
CLTC5540
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(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 (0.2GHz to 2GHz) ...............9dBm
21
CT 13 GND
3
GND
LO1, LO2 Input DC Voltage ....................................0.5V
GND
GND 4 12
RF Input Power (0.2GHz to 2GHz) ........................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 5mm) PLASTIC QFNs
T = 150C, = 34C/W, = 3C/W
JMAX JA JC
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
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LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC5540IUH#PBF LTC5540IUH#TRPBF 5540 20-Lead (5mm 5mm) Plastic QFN 40C to 85C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: