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SPA-1118

850 MHz 1 Watt Power Amplifier with Active Bias

Stanford Microdevices 

Product Description

Stanford Microdevices’ SPA-1118 is a high efficiency GaAs

Heterojunction Bipolar Transistor (HBT) amplifier housed in

a low-cost surface-mountable plastic package. These HBT

amplifiers are fabricated using molecular beam epitaxial

growth technology which produces reliable and consistent

performance from wafer to wafer and lot to lot.

This product is specifically designed for use as a driver

amplifier for infrastructure equipment in the 850 MHz band.

Its high linearity makes it an ideal choice for wireless data

and digital applications.

VCC

VBIAS

RFIN

N/C

Active Bias

Input

Match

N/C

N/C

RFOUT/

VCC

N/C

SPA-1118

Preliminary

850 MHz 1 Watt Power Amplifier

with Active Bias

Product Features

• On-chip Active Bias Control

• Patented High Reliability GaAsHBT Technology

• High Linearity Performance: +48dBm OIP3 Typ.

• Surface-Mountable Plastic Package

Applications

• W-CDMA Systems

• Multi-Carrier Applications

• AMPS, ISM Applications

Symbol

f0

P1dB

S21

VSWR

OIP3

ICC

Rth, j-l

Parameters: Test Conditions:

Z0 = 50 Ohms, VCC = 5V, Temp = 25ºC

Frequency of Operation

Output Power at 1dB Compression

Small Signal Gain

Input VSWR

Output Third Order Intercept Point

Power out per tone = +14 dBm

Device Current

Thermal Resistance (junction - lead)

Units

Min.

Typ.

Max.

MHz

810

960

dBm

29.5

dB

17.0

-

1.5:1

dBm

48.0

mA

320

ºC/W

40

The information provided herein is believed to be reliable at press time. Stanford Microdevices assumes no responsibility for inaccuracies or omissions.

Stanford Microdevices assumes no responsibility for the use of this information, and all such information shall be entirely at the user’s own risk. Prices and specifications are subject to change

without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. Stanford Microdevices does not authorize or warrant any Stanford

Microdevices product for use in life-support devices and/or systems.

Copyright 2001 Stanford Microdevices, Inc. All worldwide rights reserved.

726 Palomar Ave., Sunnyvale, CA 94085

Phone: (800) SMI-MMIC

http://www.stanfordmicro.com

1

EDS-101427 Rev B

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