The SGA7489Z is a high performance SiGe HBT MMIC Amplifier. A Darling-
ton configuration featuring one-micron emitters provides high F
T
and
excellent thermal performance. The heterojunction increases breakdown
voltage and minimizes leakage current between junctions. Cancellation of
emitter junction non-linearities results in higher suppression of intermodu-
lation products. Only two DC-blocking capacitors, a bias resistor, and an
optional RF choke are required for operation.
Optimum Technology
Matching® Applied
GaAs HBT
GaAs MESFET
InGaP HBT
SiGe BiCMOS
Si BiCMOS
30
25
20
Gain (dB)
15
10
5
Isolation
Output
Return Loss
Features
DC to 3000MHz Operation
Very High IF Output IP
3
:
39dBm at 100MHz
High Output IP
3
: +35.5dBm
typ. at 850MHz
Low Noise Figure: 3.3dB typ.
at 1950MHz
Oscillator Amplifiers
PA for Low/Medium Power
Applications
IF/RF Buffer Amplifier
Drivers for CATV Amplifiers
LO Driver Amplifier
Gain, Return Loss, and Isolation vs. Frequency
V
D
=5.0V, I
D
=115mA (Typ), T
LEAD
=+25C
0
Applications
Return Loss & Isolation (dB)
-5
Gain
SiGe HBT
GaAs pHEMT
Si CMOS
Si BJT
GaN HEMT
InP HBT
RF MEMS
LDMOS
Input Return
Loss
-10
-15
-20
-25
0
0
500
1000
1500
2000
2500
-30
3000
Frequency (MHz)
Parameter
Small Signal Gain
Output Power at 1dB Compression
Min.
20.0
17.0
18.5
Specification
Typ.
21.5
18.5
22.4
20.0
39.0
35.5
33.0
36.0*
3000
15.0
11.0
3.3
Max.
23.0
20.0
Unit
dB
dB
dBm
dBm
dBm
dBm
dBm
dBm
MHz
dB
dB
dB
Condition
850MHz
1950MHz
850MHz
1950MHz
100MHz
850MHz
1950MHz
1950MHz, Using 2GHz App. Ckt.
>9dB
1950MHz
1950MHz
1950MHz, Z
S
=50Ω
Output Third Intercept Point
31.0
Bandwidth Determined by Return
Loss
Input Return Loss
Output Return Loss
Noise Figure
10.3
9.0
4.3
Reverse Isolation
23.0
dB
1950MHz
Device Operating Voltage
4.7
5.0
5.3
V
Device Operating Current
103
115
127
mA
Thermal Resistance
82
°C/W
(Junction - Lead)
Test Conditions: V
S
=8V, I
D
=115mA Typ., OIP
3
Tone Spacing=1MHz, P
OUT
per tone=0dBm, R
BIAS
=26Ω, T
L
=25°C, Z
S
=Z
L
=50Ω
RF MICRO DEVICES®, RFMD®, Optimum Technology Matching®, Enabling Wireless Connectivity™, PowerStar®, POLARIS™ TOTAL RADIO™ and UltimateBlue™ are trademarks of RFMD, LLC. BLUETOOTH is a trade-
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