LTC5510_15 Datasheet, PDF (1/30 Pages) Linear Technology – 1MHz to 6GHz Wideband High Linearity Active Mixer

FEATURES
n _{Input Frequency Range to 6GHz}
n _{50Ω Matched Input from 30MHz to >3GHz}
n _{Capable of Up- or Down-Conversion}
n _{OIP3: 27dBm at fOUT = 1575MHz}
n _{1.5dB Conversion Gain}
n _{Noise Figure: 11.6dB at fOUT = 1575MHz}
n _{High Input P1dB: 11dBm at 5V}
n _{5V or 3.3V Supply at 105mA}
n _{Shutdown Control}
n _{LO Input Impedance Always Matched}
n _{0dBm LO Drive Level}
n _{0n-Chip Temperature Monitor}
n _{–40°C to 105°C Operation (TC)}
n _{16-Lead (4mm × 4mm) QFN Package}
APPLICATIONS
n _{Wideband Receivers/Transmitters}
n _{Cable Downlink Infrastructure}
n _{HF/VHF/UHF Mixer}
n _{Wireless Infrastructure}
LTC5510
1MHz to 6GHz Wideband
High Linearity Active Mixer
DESCRIPTION
The LTC^®5510 is a high linearity mixer optimized for applica-
tions requiring very wide input bandwidth, low distortion,
and low LO leakage. The chip includes a double-balanced
active mixer with an input buffer and a high speed LO ampli-
fier. The input is optimized for use with 1:1 transmission-
line baluns, allowing very wideband impedance matching.
The mixer can be used for both up- and down-conversion
and can be used in wideband systems.
The LO can be driven differentially or single-ended and
requires only 0dBm of LO power to achieve excellent distor-
tion and noise performance, while also reducing external
drive circuit requirements. The LTC5510 offers low LO
leakage, greatly reducing the need for output filtering to
meet LO suppression requirements.
The LTC5510 is optimized for 5V but can also be used
with a 3.3V supply with slightly reduced performance.
The shutdown function allows the part to be disabled for
further power savings.
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.
TYPICAL APPLICATION
30MHz to 4GHz Up/Down Mixer for Wideband Receiver
IN
30MHz TO
4GHz
50Ω
TEMPERATURE
MONITOR
TCM1-43X+
1:1
LO
50Ω
0.1µF
0.1µF
TEMP ^LO+
0.1µF
LTC5510
0.6pF
IN+
0.1µF
LO–
OUT+
BD1222J50200AHF
4:1
6.8nH
6.8pF
IN–
BIAS
OUT–
6.8nH
LGND
EN V_CC1 V_CC2 I_{ADJ 4.75kΩ}
EN
10nF
10nF
5V
1µF
OUT
1575MHz
50Ω
5510 TA01
Conversion Gain, IIP3 and NF
vs Input Frequency
30
25
IIP3
20
HS LO
15 _NF
LS LO
10
5
G_C
0
0
f_OUT = 1575MHz
P_IN = –10dBm
P_LO = 0dBm
T_C = 25°C
1000
2000
3000
INPUT FREQUENCY (MHz)
4000
5510 TA01a
For more information www.linear.com/LTC5510
5510fa
1