Page 1
Product Description
Stanford Microdevices’ SGA-3586 is a high performance
cascadeable 50-ohm amplifier designed for operation at
voltages as low as 3.5V. This RFIC uses the latest Silicon
Germanium Heterostructure Bipolar Transistor (SiGe HBT)
process featuring 1 micron emitters with FT up to 50 GHz.
This circuit uses a darlington pair topology with resistive
feedback for broadband performance as well as stability
over its entire temperature range. Internally matched to
50 ohm impedance, the SGA-3586 requires only DC blocking
and bypass capacitors for external components.
Small Signal Gain vs. Frequency
30
20
dB
10
0
0123456
Frequency GHz
Preliminary
SGA-3586
DC-5000 MHz Silicon Germanium
Cascadeable Gain Block
Product Features
• DC-5000 MHz Operation
• Single Voltage Supply
• High Gain: 25 dB typ. at 850 MHz
• Low Current Draw: 35mA at 3.5V typ.
• Low Noise Figure: 2.5 dB typ. at 1950 MHz
Applications
• Oscillator Amplifiers
• PA for Low Power Applications
• IF/ RF Buffer Amplifier
• Drivers for CATV Amplifiers
Electrical Specifications
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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 1999 Stanford Microdevices, Inc. All worldwide rights reserved.
522 Almanor Ave., Sunnyvale, CA 94086 Phone: (800) SMI-MMIC http://www.stanfordmicro.com
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EDS-101382 Rev A
Page 2
Absolute Maximum Ratings
Operation of this device above any one of these parameters
may cause permanent damage.
Bias Conditions should also satisfy the following expression:
IDVD (max) < (TJ - TOP)/Rth, j-l
Preliminary
Preliminary
SGA-3586 DC-5000 MHz 3.5V SiGe Amplifier
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522 Almanor Ave., Sunnyvale, CA 94086 Phone: (800) SMI-MMIC http://www.stanfordmicro.com
2
EDS-101382 Rev A
Page 3
SGA-3586 DC-5000 MHz 3.5V SiGe Amplifier
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Application Schematic for Operation at 850 MHz
Preliminary
Preliminary
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50 ohm
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Application Schematic for Operation at 1950 MHz
50 ohm
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522 Almanor Ave., Sunnyvale, CA 94086 Phone: (800) SMI-MMIC http://www.stanfordmicro.com
3
EDS-101382 Rev A
Page 4
Preliminary
Preliminary
SGA-3586 DC-5000 MHz 3.5V SiGe Amplifier
dB
dB
30
20
10
0
0123456
S21, ID = 35mA, T = 25°C
Frequency GHz
0
-10
-20
-30
0123456
S11, ID = 35mA, T = 25°C
Frequency GHz
0
-10
dB
-20
-30
-40
0123456
S12, ID = 35mA, T = 25°C
Frequency GHz
S22, ID = 35mA, T = 25°C
0
-10
dB
-20
-30
-40
0123456
Frequency GHz
S22, I
S11, ID=35mA, Ta= 25°C
Freq. Min = 0.05 GHz
Freq. Max = 6.0 GHz
F = 6.0 GHz
522 Almanor Ave., Sunnyvale, CA 94086 Phone: (800) SMI-MMIC http://www.stanfordmicro.com
4
=35mA, Ta= 25°C
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F = 6.0 GHz
Freq. Min = 0.05 GHz
Freq. Max = 6.0 GHz
EDS-101382 Rev A
Page 5
Preliminary
Preliminary
SGA-3586 DC-5000 MHz 3.5V SiGe Amplifier
dB
dB
30
20
10
0
0123456
0
-10
-20
-30
0123456
S21, ID = 35mA, T = -40°C
Frequency GHz
S11, ID = 35mA, T = -40°C
Frequency GHz
0
-10
dB
-20
-30
-40
0123456
S12, ID = 35mA, T = -40°C
Frequency GHz
S22, ID = 35mA, T = -40°C
0
-10
dB
-20
-30
-40
0123456
Frequency GHz
S22, I
S11, ID=35mA, Ta= -40°C
Freq. Min = 0.05 GHz
Freq. Max = 6.0 GHz
F = 6.0 GHz
522 Almanor Ave., Sunnyvale, CA 94086 Phone: (800) SMI-MMIC http://www.stanfordmicro.com
5
=35mA, Ta= -40°C
D
F = 6.0 GHz
Freq. Min = 0.05 GHz
Freq. Max = 6.0 GHz
EDS-101382 Rev A
Page 6
Preliminary
Preliminary
SGA-3586 DC-5000 MHz 3.5V SiGe Amplifier
dB
dB
30
20
10
0
0123456
0
-10
-20
-30
0123456
S21, ID = 35mA, T = 85°C
Frequency GHz
S11, ID = 35mA, T = 85°C
Frequency GHz
0
-10
dB
-20
-30
-40
0123456
S12, ID = 35mA, T = 85°C
Frequency GHz
S22, ID = 35mA, T = 85°C
0
-10
dB
-20
-30
-40
0123456
Frequency GHz
S22, I
S11, ID=35mA, Ta=85°C
Freq. Min = 0.05 GHz
Freq. Max = 6.0 GHz
F = 6.0 GHz
522 Almanor Ave., Sunnyvale, CA 94086 Phone: (800) SMI-MMIC http://www.stanfordmicro.com
6
=35mA, Ta=85°C
D
F = 6.0 GHz
Freq. Min = 0.05 GHz
Freq. Max = 6.0 GHz
EDS-101382 Rev A
Page 7
Preliminary
Preliminary
SGA-3586 DC-5000 MHz 3.5V SiGe Amplifier
Part Number Ordering Information
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6853-AGS"310003
Caution ESD Sensitive:
Appropriate precautions in handling, packaging
and testing devices must be observed.
Evaluation Board Layout
The part will be symbolized with an “A35” designator on
Part Symbolization
the top surface of the package.
PCB Pad Layout
A35
Package Dimensions
A35
522 Almanor Ave., Sunnyvale, CA 94086 Phone: (800) SMI-MMIC http://www.stanfordmicro.com
7
EDS-101382 Rev A
Page 8
For 86 Outline
SGA-3586 DC-5000 MHz 3.5V SiGe Amplifier
Component Tape and Reel Packaging
Tape Dimensions
Preliminary
Preliminary
D
ESCRIPTION
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522 Almanor Ave., Sunnyvale, CA 94086 Phone: (800) SMI-MMIC http://www.stanfordmicro.com
8
S
YMBOL
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01.0±00.8
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01.0±00.4
01.0±57.1
52.0±01.9
10.0±50.0
03.0±00.21
T
F
2
EDS-101382 Rev A
50.0±03.0
50.0±05.5
50.0±00.2
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