IIP3 (dBm), SSB NF (dB)
LTC5569
300MHz to 4GHz
3.3V Dual Active
Downconverting Mixer
FEATURES DESCRIPTION
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High IIP3: 26.8dBm at 1950MHz
The LTC 5569 dual active downconverting mixer is opti-
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2dB Conversion Gain
mized for diversity and MIMO receiver applications that
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Low Noise Figure: 11.7dB at 1950MHz
require low power and small size. Each mixer includes an
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17dB NF Under 5dBm Blocking
independent LO buffer amplifier, active mixer core, and
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44dB Channel Isolation
bias circuit with enable pin. The symmetry of the IC as-
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Low Power: 3.3V/600mW Total
sures that a phase and amplitude coherent LO is applied
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Very Small Solution Size
to each mixer.
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Enable Pins for Each Mixer
The RF inputs are 50 matched from 1.4GHz to 3.3GHz,
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Wide IF Frequency Range
and easily matched for higher or lower RF frequencies with
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LO Input 50 Matched in All Modes
simple external matching. The LO input is 50 matched
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40C to 105C Operation
from 1GHz to 3.5GHz, even when one or both mixers are
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16-Lead (4mm 4mm) QFN package
disabled. The LO input is easily matched for higher or
lower frequencies, as low as 350MHz, with simple external
APPLICATIONS
matching. The low capacitance differential IF outputs are
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Wireless Infrastructure Diversity Receivers
usable up to 1.6GHz.
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MIMO Infrastructure Receivers
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.
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Remote Radio Units
TYPICAL APPLICATION
Diversity Receiver with 190MHz Bandpass IF Matching
1nF
190MHz
1nF
270nH
270nH
10nF
Mixer Conversion Gain, IIP3 and NF
3.3V
RF
vs IF Output Frequency
10nF
2.7pF
MAIN
BPF
+
5.0 28
IFA IFA V
RFA CCA
IIP3
ENA
4.5 26
BIAS
ENA
RF
RF = 1950 50MHz
4.0 24
3.9pF LO = 1760MHz
LO
P = 0dBm
LO 3.5 LO 22
LO
Z = 50
RF
3.0 Z = 50 20
IF
DUAL DUAL
LTC5569
RF
T = 25C
C
IF VGA ADC
DIVERSITY 2.7pF 2.5
18
TEST CIRCUIT IN FIGURE 1
RFB LO
G
C
16
2.0
BPF
30MHz
ENB 1.5 14
RF
BIAS ENB
NF
1.0 12
+
V
IFB IFB CCB
10
0.5
5569 TA01a
140 150 160 170 180 190 200 210 220 230 240
3.3V
IF OUTPUT FREQUENCY (MHz)
10nF
1nF
10nF
270nH 270nH 190MHz 5560 TA01b
1nF
5569fb
1
For more information www.linear.com/LTC5569
G (dB)
CLTC5569
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION
(Note 1)
TOP VIEW
Supply Voltage
+ +
V , V , IFA , IFA , IFB , IFB ........................4.0V
CCA CCB
Enable Input Voltage (ENA, ENB) .....0.3V to V + 0.3V 16 15 14 13
CC
RFA 1 12 ENA
Mixer Bias Voltage (BIASA, BIASB) ..0.3V to V + 0.3V
CC
GND 2 11 LO
17
LO Input Power (350MHz to 4.5GHz) ...................10dBm
GND
GND 3 10 GND
LO Input DC Voltage ............................................... 0.1V
RFB ENB
4 9
RFA, RFB Input Power (300MHz to 4GHz) ...........20dBm
5 6 7 8
RFA, RFB Input DC Voltage .................................... 0.1V
Operating Temperature Range (T ) ........ 40C to 105C
C
UF PACKAGE
Junction Temperature (T ) .................................... 150C
J 16-LEAD (4mm 4mm) PLASTIC QFN
Storage Temperature Range .................. 65C to 150C T = 150C, = 8C/W
JMAX JC
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION CASE TEMPERATURE RANGE
LTC5569IUF#PBF LTC5569IUF#TRPBF 5569 40C to 105C
16-Lead (4mm 4mm) Plastic QFN
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: