1 MHz to 2.7 GHz
RF Gain Block
AD8353
Data Sheet
FEATURES
FUNCTIONAL BLOCK DIAGRAM
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
BIAS AND VREF
VPOS
RFIN
RFOUT
COM2
Power supply: 3 V or 5 V
COM1
AD8353
APPLICATIONS
VCO buffers
Figure 1.
General Tx/Rx amplification
Power amplifier predrivers
Low power antenna drivers
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.
The noise figure is 5.3 dB at 900 MHz. The reverse isolation
(S12) is −36 dB at 900 MHz and −30 dB at 2.7 GHz.
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
figure is 5.6 dB at 900 MHz. The reverse isolation (S12) is −35 dB.
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 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.
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.
Rev. F
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One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2002–2017 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
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