LT5560_15 Datasheet, PDF (1/28 Pages) Linear Technology – 0.01MHz to 4GHz Low Power Active Mixer

LT5560
0.01MHz to 4GHz
Low Power Active Mixer
FEATURES
■ _{Up or Downconverting Applications}
■ _{Noise Figure: 9.3dB Typical at 900MHz Output}
■ _{Conversion Gain: 2.4dB Typical}
■ _{IIP3: 9dBm Typical at ICC = 10mA}
■ _{Adjustable Supply Current: 4mA to 13.4mA}
■ _{Low LO Drive Level: –2dBm}
■ _{Single-Ended or Differential LO}
■ _{High Port-to-Port Isolation}
■ _{Enable Control with Low Off-State Leakage Current}
■ _{Single 2.7V to 5V Supply}
■ _{Small 3mm × 3mm DFN Package}
U
APPLICATIO S
■ _{Portable Wireless}
■ _{CATV/DBS Receivers}
■ _{WiMAX Radios}
■ _{PHS Basestations}
■ _{RF Instrumentation}
■ _{Microwave Data Links}
■ _{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
–2dBm of LO power. The balanced design results in
low LO leakage to the output, while the integrated input
amplifier 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
LO_IN
760MHz
1µF
100pF
RF_IN
900MHz
100pF
4.7pF
EN
6.8nH _4.7pF
1 _LO–
2
EN
3 _IN+
4 _IN–
15nH
6.8nH
1nF
100pF
U1
LT5560
PGND
9
15nH
LO^{+ 8}
V_CC ⁷
OUT^{+ 6}
270nH
4.7pF
OUT^{– 5}
270nH
4.7pF
270nH
IF_OUT
33pF 140MHz
5560 TA01
IF_OUT and IM3 Levels
vs RF Input Power
10
0
IF_OUT
–10
–20
–30
– 40
IM3
– 50
– 60
– 70
– 80
–20 –18 –16 –14 –12 –10 –8
T_A = 25°C
V_CC = 3V
I_CC = 13.3mA
f_LO = 760MHz
f_IF = 140MHz
–6 –4 –2 0
RF INPUT POWER (dBm)
5560 TA02
5560f
1