1 MHz to 2.7 GHz

RF Gain Block

Data Sheet

AD8353

Rev. E

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FEATURES

Fixed gain of 20 dB

Operational frequency of 1 MHz to 2.7 GHz

Linear output power up to 9 dBm

Input/output internally matched to 50 Ω

Temperature and power supply stable

Noise figure: 5.3 dB

Power supply: 3 V or 5 V

APPLICATIONS

VCO buffers

General Tx/Rx amplification

Power amplifier predrivers

Low power antenna drivers

FUNCTIONAL BLOCK DIAGRAM

AD8353

BIAS AND VREF

RFIN

VPOS

RFOUT

COM2

COM1

Figure 1.

GENERAL DESCRIPTION

The AD8353 is a broadband, fixed-gain, linear amplifier that

operates at frequencies from 1 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, Inc., 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 AD8353 provides linear output power of 9 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 42 mA. At 900 MHz, the output

third-order intercept (OIP3) is greater than 23 dBm and is

19 dBm at 2.7 GHz.

The noise figure is 5.3 dB at 900 MHz. The reverse isolation

The AD8353 can also operate with a 5 V power supply; in

which case, no external inductor is required. Under these

conditions, the AD8353 delivers 8 dBm with 20 dB of gain at

900 MHz. The dc supply current is 42 mA. At 900 MHz, the

OIP3 is greater than 22 dBm and is 19 dBm at 2.7 GHz. The noise

The AD8353 is fabricated on Analog Devices proprietary, high

performance, 25 GHz, Si complementary, bipolar IC process.

The AD8353 is available in a chip scale package that uses 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, and an evaluation board is

also available.