SGA7489ZDC
to 3000MHz
Silicon Germa-
nium HBT Cas-
cadable Gain
Block
SGA7489Z
DC to 3000MHz SILICON GERMANIUM HBT
CASCADABLE GAIN BLOCK
Package: SOT-89
Product Description
Features
The SGA7489Z is a high performance SiGe HBT MMIC Amplifier. A Darling-
ton configuration featuring one-micron emitters provides high FT 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.
DC to 3000MHz Operation
Very High IF Output IP :
3
39dBm at 100MHz
High Output IP : +35.5dBm
3
typ. at 850MHz
Low Noise Figure: 3.3dB typ.
at 1950MHz
Optimum Technology
Matching® Applied
Applications
Gain, Return Loss, and Isolation vs. Frequency
GaAs HBT
VD=5.0V, ID=115mA (Typ), TLEAD=+25C
0
30
Oscillator Amplifiers
GaAs MESFET
InGaP HBT
PA for Low/Medium Power
Applications
-5
25
Gain
SiGe BiCMOS
-10
20
Si BiCMOS
Input Return
Loss
IF/RF Buffer Amplifier
Drivers for CATV Amplifiers
LO Driver Amplifier
SiGe HBT
-15
15
GaAs pHEMT
Output
Return Loss
-20
10
Si CMOS
Si BJT
-25
5
0
Isolation
GaN HEMT
InP HBT
RF MEMS
LDMOS
-30
0
500
1000
1500
2000
2500
3000
Frequency (MHz)
Specification
Parameter
Unit
Condition
Min.
20.0
17.0
Typ.
21.5
18.5
22.4
20.0
39.0
35.5
33.0
36.0*
3000
Max.
23.0
20.0
Small Signal Gain
dB
dB
850MHz
1950MHz
850MHz
1950MHz
100MHz
850MHz
1950MHz
Output Power at 1dB Compression
Output Third Intercept Point
dBm
dBm
dBm
dBm
dBm
dBm
MHz
18.5
31.0
1950MHz, Using 2GHz App. Ckt.
>9dB
Bandwidth Determined by Return
Loss
Input Return Loss
Output Return Loss
Noise Figure
10.3
9.0
15.0
11.0
3.3
dB
dB
dB
1950MHz
1950MHz
1950MHz, Z =50Ω
4.3
S
Reverse Isolation
Device Operating Voltage
Device Operating Current
Thermal Resistance
(Junction - Lead)
23.0
5.0
115
82
dB
V
mA
1950MHz
4.7
103
5.3
127
°C/W
Test Conditions: V =8V, I =115mA Typ., OIP Tone Spacing=1MHz, P
per tone=0dBm, R
=26Ω, T =25°C, Z =Z =50Ω
S
D
3
OUT
BIAS
L
S
L
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-
mark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks and registered trademarks are the property of their respective owners. ©2006, RF Micro Devices, Inc.
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
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