5.9 GHz to 8.5 GHz, Low Noise Amplifier

Data Sheet

ADL5721

Rev. 0

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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

50

Ω

SINGLE-ENDED

100Ω

DIFFERENTIAL

GND

INPT

RBIAS

VCC1

OUTN

OUTP

BAND

VCC2

ADL5721

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.