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LT5560 Datasheet, PDF (1/28 Pages) Linear Technology – 0.01MHz to 4GHz Low Power Active Mixer | |||
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LT5560
0.01MHz to 4GHz
Low Power Active Mixer
FEATURES
â Up or Downconverting Applications
â Noise Figure: 9.3dB Typical at 900MHz Output
â Conversion Gain: 2.4dB Typical
â IIP3: 9dBm Typical at ICC = 10mA
â Adjustable Supply Current: 4mA to 13.4mA
â Low LO Drive Level: â2dBm
â Single-Ended or Differential LO
â High Port-to-Port Isolation
â Enable Control with Low Off-State Leakage Current
â Single 2.7V to 5V Supply
â Small 3mm à 3mm DFN Package
U
APPLICATIO S
â Portable Wireless
â CATV/DBS Receivers
â WiMAX Radios
â PHS Basestations
â RF Instrumentation
â Microwave Data Links
â VHF/UHF 2-Way Radios
DESCRIPTIO
The LT®5560 is a low power, high performance broad-
band active mixer. This double-balanced mixer can be
driven by a single-ended LO source and requires only
â2dBm of LO power. The balanced design results in
low LO leakage to the output, while the integrated input
ampliï¬er provides excellent LO to IN isolation. The sig-
nal ports can be impedance matched to a broad range
of frequencies, which allows the LT5560 to be used as
an up- or down-conversion mixer in a wide variety of
applications.
The LT5560 is characterized with a supply current of 10mA;
however, the DC current is adjustable, which allows the
performance to be optimized for each application with a
single resistor. For example, when biased at its maximum
supply current (13.4mA), the typical upconverting mixer
IIP3 is +10.8dBm for a 900MHz output.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
Low Cost 900MHz Downconverting Mixer
2.7V TO 5.3V
LOIN
760MHz
1µF
100pF
RFIN
900MHz
100pF
4.7pF
EN
6.8nH 4.7pF
1 LOâ
2
EN
3 IN+
4 INâ
15nH
6.8nH
1nF
100pF
U1
LT5560
PGND
9
15nH
LO+ 8
VCC 7
OUT+ 6
270nH
4.7pF
OUTâ 5
270nH
4.7pF
270nH
IFOUT
33pF 140MHz
5560 TA01
IFOUT and IM3 Levels
vs RF Input Power
10
0
IFOUT
â10
â20
â30
â 40
IM3
â 50
â 60
â 70
â 80
â20 â18 â16 â14 â12 â10 â8
TA = 25°C
VCC = 3V
ICC = 13.3mA
fLO = 760MHz
fIF = 140MHz
â6 â4 â2 0
RF INPUT POWER (dBm)
5560 TA02
5560f
1
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