LINER LTC5542

Electrical Specifications Subject to Change
LTC5542
1.6GHz to 2.7GHz
High Dynamic Range
Downconverting Mixer
DESCRIPTION
FEATURES
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Conversion Gain: 8dB at 2.4GHz
IIP3: 26.8dBm at 2.4GHz
Noise Figure: 9.9dB at 2.4GHz
High Input P1dB
3.3V Supply, 660mW Power Consumption
Shutdown Pin
50Ω Single-Ended RF and LO Inputs
LO Inputs 50Ω Matched when Shutdown
High Isolation LO Switch
0dBm LO Drive Level
High LO-RF and LO-IF Isolation
Small Solution Size
20-Lead (5mm × 5mm) QFN package
The LTC®5542 is part of a family of high dynamic range passive
downconverting mixers covering the 700MHz to 4GHz
frequency range. The LTC5542 is optimized for 1.6GHz to
2.7GHz RF applications. The LO frequency must fall within
the 1.7GHz to 2.5GHz range for optimum performance. A
typical application is a LTE or WiMAX receiver with a 2.3GHz
to 2.7GHz RF input and low-side LO.
The LTC5542 is designed for 3.3V operation, however; the
IF amplifier can be powered by 5V for the highest P1dB.
An integrated SPDT LO switch with fast switching accepts
two active LO signals, while providing high isolation.
The LTC5542’s high conversion gain and high dynamic
range enable the use of lossy IF filters in high-selectivity
receiver designs, while minimizing the total solution cost,
board space and system-level variation.
APPLICATIONS
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Wireless Infrastructure Receivers
(LTE, W-CDMA. TD-SCDMA, UMTS, GSM1800)
High Dynamic Range Downmixer Applications
High Dynamic Range Downconverting Mixer Family
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.
PART#
RF RANGE
LO RANGE
LTC5540
600MHz –1.3GHz
700MHz – 1.2GHz
LTC5541
1.3GHz – 2.3GHz
1.4GHz – 2.0GHz
LTC5542
1.6GHz – 2.7GHz
1.7GHz – 2.5GHz
LTC5543
2.3GHz – 4GHz
2.4GHz – 3.6GHz
TYPICAL APPLICATION
Wideband Receiver
190MHz
SAW
1nF
VCCIF
3.3V or 5V
1μF
22pF
IF
AMP
1nF
150nH
150nH
ADC
IF –
4.7pF
LO2
LTC5542
IF
RF
LNA
ALTERNATE LO FOR
FREQUENCY-HOPPING
LO
0.7pF
4.7pF
SHDN
(0V/3.3V)
BIAS
SHDN
VCC2
VCC 3.3V
1μF
VCC1
22pF
VCC3
LO1
LOSEL
LO SELECT
(0V/3.3V)
28
8.8
IIP3 26
8.6
24
8.4
SYNTH 2
SYNTH 1
LO
2160MHz
5542 TA01
GC (dB)
RF
2300MHz
TO
2400MHz
IMAGE
BPF 22pF
9.0
22
±30MHz
8.2
8.0
20
GC
18
7.8
f = 2160MHz
7.6 PLO = 0dBm
LO
7.4 RF = 2350 ±50MHz
TEST CIRCUIT IN FIGURE 1
7.2
16
14
IIP3 (dBm), SSB NF (dB)
IF+
Wideband Conversion Gain, IIP3
and NF vs IF Output Frequency
190MHz
BPF
12
NF
10
7.0
8
140 150 160 170 180 190 200 210 220 230 240
IF OUTPUT FREQUENCY (MHz)
5542 TA02
5542p
1
LTC5542
ABSOLUTE MAXIMUM RATINGS
PIN CONFIGURATION
(Note 1)
IFGND
GND
IF–
IFBIAS
IF+
TOP VIEW
Mixer Supply Voltage (VCC1, VCC2)...........................3.8V
LO Switch Supply Voltage (VCC3).............................3.8V
IF Supply Voltage (IF+, IF –) ......................................5.5V
Shutdown Voltage (SHDN) ................–0.3V to VCC +0.3V
LO Select Voltage (LOSEL)................–0.3V to VCC +0.3V
LO1, LO2 Input Power (1GHz to 3GHz) ...................9dBm
LO1, LO2 Input DC Voltage ....................................±0.5V
RF Input Power (1GHz to 3GHz) ...........................15dBm
RF Input DC Voltage ............................................... ±0.1V
Operating Temperature Range .................–40°C to 85°C
Storage Temperature Range .................. –65°C to 150°C
Junction Temperature (TJ) .................................... 150°C
20 19 18 17 16
15 LO2
NC 1
14 VCC3
RF 2
21
GND
CT 3
13 GND
7
8
9 10
LOSEL
GND
6
VCC1
11 LO1
VCC2
12 GND
SHDN 5
LOBIAS
GND 4
UH PACKAGE
20-LEAD (5mm s 5mm) PLASTIC QFN
TJMAX = 150°C, θJA = 34°C/W
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
LTC5542IUH#PBF
LTC5542IUH#TRPBF
5542
20-Lead (5mm x 5mm) Plastic QFN
–40°C to 85°C
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: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
AC ELECTRICAL CHARACTERISTICS
VCC = 3.3V, VCCIF = 3.3V, SHDN = Low, TA = 25°C, PLO = 0dBm,
unless otherwise noted. Test circuit shown in Figure 1. (Notes 2, 3, 4)
PARAMETER
CONDITIONS
MIN
LO Input Frequency Range
RF Input Frequency Range
Low-Side LO
High-Side LO
TYP
MAX
UNITS
1700 to 2500
MHz
1900 to 2700
1600 to 2300
MHz
MHz
5 to 500
MHz
IF Output Frequency Range
Requires External Matching
RF Input Return Loss
ZO = 50Ω, 1600MHz to 2700MHz
>12
dB
LO Input Return Loss
ZO = 50Ω, 1700MHz to 2500MHz
>12
dB
IF Output Return Loss
Requires External Matching
>12
dB
LO Input Power
fLO = 1700MHz to 2500MHz
LO to RF Leakage
fLO = 1700MHz to 2500MHz
<–32
dBm
LO to IF Leakage
fLO = 1700MHz to 2500MHz
<–40
dBm
LO Switch Isolation
LO1 Selected, 1700MHz < fLO < 2500MHz
LO2 Selected, 1700MHz < fLO < 2500MHz
49
52
dB
dB
RF to LO Isolation
fRF = 1600MHz to 2700MHz
>50
dB
RF to IF Isolation
fRF = 1600MHz to 2700MHz
>35
–4
0
6
dBm
dB
5542p
2