1

EDS-101801 Rev D

Product Description

303 Technology Court, Broomfield, CO 80021

Phone: (800) SMI-MMIC

http://www.sirenza.com

The information provided herein is believed to be reliable at press time. Sirenza Microdevices assumes no responsibility for inaccuracies or omissions. Sirenza 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. Sirenza Microdevices does not authorize or warrant any Sirenza Microdevices product for use in life-support devices and/or systems. Copyright 2001 Sirenza Microdevices, Inc.. All worldwide rights

SGA-7489

&

Package

Green

DC-3000 MHz Silicon Germanium

HBT Cascadeable Gain Block

Product Features

Compliant, & Green Packaging

• Very High IF Output IP3: 39dBm at 100MHz

• High Output IP3: +35.5 dBm typ. at 850 MHz

• Low Noise Figure: 3.3 dB typ. at 1950 MHz

Applications

• PA for Low / Medium Power Applications

• IF/ RF Buffer Amplifier

• Drivers for CATV Amplifiers

• LO Driver Amplifier

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Test Conditions:

The SGA-7489 is a high performance SiGe HBT

MMIC Amplifier. A Darlington configuration featuring

1 micron emitters provides high FT and excellent

thermal perfomance. The heterojunction increases

breakdown voltage and minimizes leakage current

between junctions. Cancellation of emitter junction

non-linearities results in higher suppression of

intermodulation products. Only 2 DC-blocking ca-

pacitors, a bias resistor and an optional RF choke

are required for operation.

The matte tin finish on Sirenza’s lead-free package

utilizes a post annealing process to mitigate tin whis-

ker formation and is RoHS compliant per EU Direc-

tive 2002/95. This package is also manufactured

with green molding compounds that contain no an-

timony trioxide nor halogenated fire retardants.

Gain, Return Loss, and Isolation vs. Frequency

0

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500

1000

1500

2000

2500

3000

Frequency (MHz)

-30

-25

-20

-15

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Input Return

Loss

Output

Return Loss

Isolation

Gain

V

I

OIP

Bias Resistance = 26 Ohms

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NOTE: The recommended operating current in the preliminary datasheet was 130mA. Supplemental measurements have since shown

that an operating current of 115mA results in optimal RF performance over temperature. Continued operation at 130mA is reliable,

however, the recommended operating current has been changed to 115mA.