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AD8354

100 MHz to 2.7 GHz

RF Gain Block

FEATURES

Fixed Gain of 20 dB

Operational Frequency of 100 MHz to 2.7 GHz

Linear Output Power-Up to 4 dBm

Input/Output Internally Matched to 50

Temperature and Power Supply Stable

Noise Figure 4.2 dB

Power Supply 3 V or 5 V

APPLICATIONS

VCO Buffers

General Tx/Rx Amplification

Power Amplifier Predriver

Low Power Antenna Driver

FUNCTIONAL BLOCK DIAGRAM

BIAS AND VREF

COM1

INPT

VOUT

VPOS

COM2

AD8354

GENERAL DESCRIPTION

The AD8354 is a broadband, fixed-gain linear amplifier that

operates at frequencies from 100 MHz up to 2.7 GHz. It is

intended for use in a wide variety of wireless devices including

cellular, broadband, CATV, and LMDS/MMDS applications.

By taking advantage of Analog Devices’ high performance

complementary Si bipolar process, these gain blocks provide

excellent stability over process, temperature, and power supply.

This amplifier is single-ended and internally matched to 50

Ω

with a return loss of greater than 10 dB over the full operating

frequency range.

The AD8354 provides linear output power of nearly 4.3 dBm

with 20 dB of gain at 900 MHz when biased at 3 V and an

external RF choke is connected between the power supply and

the output pin. The dc supply current is 24 mA. At 900 MHz,

the output third order intercept (OIP3) is greater than 18 dBm;

at 2.7 GHz, the OIP3 is 14 dBm.

The noise figure is 4.2 dB at 900 MHz. The reverse isolation

The AD8354 can also operate with a 5 V power supply, in which

case no external inductor is required. Under these conditions,

the AD8354 delivers 4.8 dBm with 20 dB of gain at 900 MHz.

The dc supply current is 26 mA. At 900 MHz, the OIP3 is

greater than 19 dBm, and at 2.7 GHz, the OIP3 is 15 dBm.

The noise figure is 4.4 dB at 900 MHz. The reverse isolation

The AD8354 is fabricated on Analog Devices’ proprietary, high

performance 25 GHz Si complementary bipolar IC process. The

AD8354 is available in a chip scale package that utilizes an exposed

paddle for excellent thermal impedance and low impedance

electrical connection to ground. It operates over a –40

°C to

+85

°C temperature range.

An evaluation board is available.