17.7 GHz to 19.7 GHz, Low Noise Amplifier

Data Sheet

ADL5725

Rev. 0

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FEATURES

Frequency range: 17.7 GHz to 19.7 GHz

Typical gain of >25.1 dB

Low noise input

Noise figure: 2.4 dB typical

High linearity input

>−1.5 dBm typical input third-order intercept (IIP3)

−11.5 dBm input 1 dB compression point (P1dB) at 19.7 GHz

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

DNC

VCC2

ADL5725

DNC = DO NOT CONNECT.

DO NOT CONNECT TO THIS PIN.

Figure 1.

GENERAL DESCRIPTION

The ADL5725 is a narrow-band, high performance, low noise

amplifier (LNA) targeting microwave radio link receiver designs.

The monolithic silicon germanium (SiGe) design is optimized for

microwave radio link bands ranging from 17.7 GHz to 19.7 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 provides noise figure performance that, in

the past, required more expensive three-five (III-V) compounds

process technology to achieve.

The ADL5721 and ADL5723 to ADL5726 family of narrow-band

LNAs are each packaged in a tiny, thermally enhanced, 2.00 mm ×

2 mm LFCSP package. The ADL5721 and ADL5723 to ADL5726

family operates over the temperature range of −40°C to +85°C.