LTC5576_15 Datasheet, PDF (1/24 Pages) Linear Technology – 3GHz to 8GHz High Linearity Active Upconverting Mixer

Features
nn _{25dBm OIP3}
nn _{–0.6dB Conversion Gain}
nn _{14.1dB Noise Figure at 5.8GHz}
nn _{–154dBm/Hz Output Noise Floor}
nn _{Low LO-RF Leakage}
nn _{0dBm LO Drive}
nn _{Broadband 50Ω Matched Input}
nn _{High Input P1dB: 10dBm at 5V}
nn _{5V or 3.3V Supply at 99mA}
nn _{Single-Ended Output and LO Input}
nn _{Enable Pin}
nn _{–40°C to 105°C Operation (TC)}
nn _{16-Lead (4mm × 4mm) QFN Package}
Applications
nn _{Wideband Transmitters}
nn _{4G and 5G Wireless Infrastructure}
nn _{Fixed Wireless Access Equipment}
nn _{Wireless Repeaters}
LTC5576
3GHz to 8GHz
High Linearity Active
Upconverting Mixer
Description
The LTC^®5576 is a high linearity active mixer optimized for
upconverting applications requiring wide input bandwidth,
low distortion and low LO leakage. The integrated output
transformer is optimized for 4GHz to 6GHz applications,
but is easily retuned for output frequencies as low as 3GHz,
or as high as 8GHz, with minor performance degradation.
The input is optimized for use with 1:1 transmission-line
baluns, allowing very wideband impedance matching.
The LO input port is single-ended and requires only 0dBm
of LO power to achieve excellent distortion and noise per-
formance while also reducing circuit requirements. The
LTC5576 offers low LO leakage, reducing the demands
of output filtering to meet LO suppression requirements.
The LTC5576 is optimized for 5V but can also be used
with a 3.3V supply with slightly reduced performance. The
enable function allows the part to be easily shut down 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
100pF
LO
50Ω
0.3pF
TEMPERATURE
MONITOR
TEMP
IN
50Ω
TC1-1-13M
1:1
100pF
IN⁺
IN^–
100pF
LGND
EN
EN
LO
BIAS
V_CC
OUT
IADJ
2.61k
10nF
1µF
OUT
50Ω
0.2pF
5V
5576 TA01a
For more information www.linear.com/LTC5576
OIP3 and Conversion Gain vs
Output Frequency (LSLO)
30
15
25
f_IN = 456MHz
20
15
10
f_IN = 900MHz
5
OIP3
G_C
0
10
–5
T_C = 25°C, OUTPUT TUNED FOR EACH BAND
5
–10
3000 4000 5000 6000 7000 8000
OUTPUT FREQUENCY (MHz)
5576 TA01b
5576f
1