1
Product Description
EDS-100643 Rev. D
522 Almanor Ave., Sunnyvale, CA 94085 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 users 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 reserved.
SGA-4486
DC-4500 MHz, Cascadable
SiGe HBT MMIC Amplifier
Product Features
High Gain : 15.9 dB at 1950 MHz
Cascadable 50 Ohm
Patented SiGe Technology
Operates From Single Supply
Low Thermal Resistance Package
Applications
PA Driver Amplifier
Cellular, PCS, GSM, UMTS
IF Amplifier
Wireless Data, Satellite
Sirenza Microdevices SGA-4486 is a high performance SiGe
HBT MMIC Amplifier. A Darlington configuration featuring 1
micron emitters provides high F
T
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. At 850 Mhz and 45mA , the SGA-
4486 typically provides +28.2 dBm output IP3, 18.5 dB of gain,
and +15.4 dBm of 1dB compressed power using a single positive
voltage supply. Only 2 DC-blocking capacitors, a bias resistor
and an optional RF choke are required for operation.
0
6
12
18
24
0
1
2
3
4
5
Frequency (GHz)
Ga
in
(
d
B
)
-40
-30
-20
-10
0
Return Los
s
(dB)
GAIN
IRL
ORL
Gain & Return Loss vs. Frequency
V
D
= 3.2 V, I
D
= 45 mA (Typ.)
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Test Conditions:
V
S
= 8 V
I
D
= 45 mA Typ.
OIP
3
Tone Spacing = 1 MHz, Pout per tone = -5 dBm
R
BIAS
= 110 Ohms
T
L
= 25ēC
Z
S
= Z
L
= 50 Ohms
2
EDS-100643 Rev. D
Preliminary
SGA-4486 DC-4500 MHz Cascadable MMIC Amplifier
522 Almanor Ave., Sunnyvale, CA 94085 Phone: (800) SMI-MMIC http://www.sirenza.com
Typical RF Performance at Key Operating Frequencies
Frequency (MHz)
Frequency (MHz)
Frequency (MHz)
V
S
= 8 V
I
D
= 80 mA Typ.
OIP
3
Tone Spacing = 1 MHz, Pout per tone = 0 dBm
R
BIAS
= 39 Ohms
T
L
= 25ēC
Z
S
= Z
L
= 50 Ohms
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6
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2
7
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2
8
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2
2
.
3
Frequency (MHz)
Test Conditions:
V
S
= 8 V
I
D
= 45 mA Typ.
OIP
3
Tone Spacing = 1 MHz, Pout per tone = -5 dBm
R
BIAS
= 110 Ohms
T
L
= 25ēC
Z
S
= Z
L
= 50 Ohms
0
1
2
3
4
5
0
0.5
1
1.5
2
2.5
3
Frequency (GHz)
Nois
e F
i
gur
e (
d
B
)
15
20
25
30
35
0
0.5
1
1.5
2
2.5
3
Frequency (GHz)
OIP
3
(d
B
m
)
6
9
12
15
18
0
0.5
1
1.5
2
2.5
3
Frequency (GHz)
P
1dB
(d
B
m
)
T
L
=+25ēC
T
L
=+25ēC
T
L
=+25ēC
OIP
3
vs. Frequency
V
D
=3.2 V, I
D
= 45 mA (Typ.)
P
1dB
vs. Frequency
V
D
= 3.2 V, I
D
= 45 mA (Typ.)
Absolute Maximum Ratings
Noise Figure vs. Frequency
V
D
= 3.2 V, I
D
= 45 mA (Typ.)
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3
EDS-100643 Rev. D
Preliminary
SGA-4486 DC-4500 MHz Cascadable MMIC Amplifier
522 Almanor Ave., Sunnyvale, CA 94085 Phone: (800) SMI-MMIC http://www.sirenza.com
-30
-25
-20
-15
-10
0
1
2
3
4
5
Frequency (GHz)
S
12
(d
B
)
+25°C
-40°C
+85°C
0
6
12
18
24
0
1
2
3
4
5
Frequency (GHz)
S
21
(d
B
)
+25°C
-40°C
+85°C
-40
-30
-20
-10
0
0
1
2
3
4
5
Frequency (GHz)
S
22
(d
B
)
+25°C
-40°C
+85°C
T
L
T
L
T
L
-40
-30
-20
-10
0
0
1
2
3
4
5
Frequency (GHz)
S
11
(d
B
)
+25°C
-40°C
+85°C
T
L
NOTE: Full S-parameter data available at www.sirenza.com
Typical RF Performance Over Temperature (
Bias: V
D
= 3.2 V, I
D
= 45 mA (Typ.)
)
|
S
11
|
vs. Frequency
|
S
21
|
vs. Frequency
|
S
12
|
vs. Frequency
|
S
22
|
vs. Frequency
4
EDS-100643 Rev. D
Preliminary
SGA-4486 DC-4500 MHz Cascadable MMIC Amplifier
522 Almanor Ave., Sunnyvale, CA 94085 Phone: (800) SMI-MMIC http://www.sirenza.com
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5
1
Mounting Instructions
1. Use a large ground pad area under device pins 2
and 4 with many plated through-holes as shown.
2. We recommend 1 or 2 ounce copper. Measurements
for this data sheet were made on a 31 mil thick FR-4
board with 1 ounce copper on both sides.
Basic Application Circuit
RF in
RF out
1 uF
C
B
C
B
C
D
V
S
R
BIAS
L
C
1
2
3
4
For package dimensions, refer to outline drawing at
www.sirenza.com
1000
pF
SGA-4486
Application Circuit Element Values
Part Number Ordering Information
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6
8
4
4
-
A
G
S
"
3
1
0
0
0
3
The part will be marked with an A44 designator on
the top surface of the package.
Part Identification Marking
#
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p
1 uF
R
BIAS
A44
1000 pF
Caution: ESD sensitive
Appropriate precautions in handling, packaging
and testing devices must be observed.
C
B
C
B
C
D
L
C
V
S
1
2
3
4
A44
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5
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=
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(
=
S
V
-
D
I
/
)
D
V
(
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tl
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8
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0
1
V
2
1
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I
B
2
6
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1
0
5
1
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2
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C
D
s
e
d
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v
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r
p
5
EDS-100643 Rev. D
Preliminary
SGA-4486 DC-4500 MHz Cascadable MMIC Amplifier
522 Almanor Ave., Sunnyvale, CA 94085 Phone: (800) SMI-MMIC http://www.sirenza.com
PCB Pad Layout
Dimensions in inches [millimeters]
Nominal Package Dimensions
Dimensions in inches [millimeters]
Refer to drawing posted at www.sirenza.com for tolerances.
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