5.9 GHz to 8.5 GHz, Low Noise Amplifier
Data Sheet
Rev. 0 Document Feedback
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FEATURES
Frequency range: 5.9 GHz to 8.5 GHz
Typical gain of 25 dB
Low noise input
Noise figure: <1.7 dB typical from 5.9 GHz to 8.5 GHz
High linearity input
>4.0 dBm typical input third-order intercept (IIP3)
>−10.6 dBm typical input 1 dB compression point (P1dB)
Matched 50 Ω single-ended input
Matched 100 Ω differential outputs
8-lead, 2.00 mm × 2.00 mm LFCSP microwave packaging
APPLICATIONS
Point to point microwave radios
Instrumentation
Satellite communications (SATCOM)
Phased arrays
FUNCTIONAL BLOCK DIAGRAM
50Ω
SINGLE-ENDED
100Ω
DIFFERENTIAL
GND
INPT
RBIAS
VCC1
OUTN
OUTP
BAND
VCC2
ADL5721
14258-001
Figure 1.
GENERAL DESCRIPTION
The ADL5721 is a narrow-band, high performance, low noise
amplifier targeting microwave radio link receiver designs. The
monolithic silicon germanium (SiGe) design is optimized for
microwave radio link bands ranging from 5.9 GHz to 8.5 GHz.
The unique design offers a single-ended 50 Ω input impedance
and provides a 100 Ω balanced differential output that is ideal
for driving Analog Devices, Inc., differential downconverters
and radio frequency (RF) sampling analog-to-digital converters
(ADCs). This low noise amplifier (LNA) provides noise figure
performance that, in the past, required more expensive three-
five (III-V) compounds process technology to achieve. This
LNA uses a band switch feature to allow the input P1dB and
noise figure to trade off for optimum system performance.
The ADL5721 and ADL5723 to ADL5726 family of narrow-
band LNAs are each packaged in a tiny, thermally enhanced,
2.00 mm × 2.00 mm LFCSP package. The ADL5721 and
ADL5723 to ADL5726 family operates over the temperature
range of −40°C to +85°C.
