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
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-
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.
DS100915
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
1 of 6
SGA7489Z
Absolute Maximum Ratings
Parameter
Max Device Current (I
D
)
Max Device Voltage (V
D
)
Max RF Input Power, Z
L
=50Ω
Max RF Input Power, Load
VSWR=10:1*
Max Junction Temp (T
J
)
Operating Temp Range (T
L
)
Max Storage Temp
Moisture Sensitivity Level
Rating
170
7
+16
+2
+150
-40 to +85
+150
MSL 2
Unit
mA
V
dBm
dBm
°C
°C
°C
Caution! ESD sensitive device.
Exceeding any one or a combination of the Absolute Maximum Rating conditions may
cause permanent damage to the device. Extended application of Absolute Maximum
Rating conditions to the device may reduce device reliability. Specified typical perfor-
mance or functional operation of the device under Absolute Maximum Rating condi-
tions is not implied.
RoHS status based on EUDirective2002/95/EC (at time of this document revision).
The information in this publication is believed to be accurate and reliable. However, no
responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any
infringement of patents, or other rights of third parties, resulting from its use. No
license is granted by implication or otherwise under any patent or patent rights of
RFMD. RFMD reserves the right to change component circuitry, recommended appli-
cation circuitry and specifications at any time without prior notice.
*Note: Take into account out of band load VSWR presented by devices such as SAW
filters to determine maximum RF input power. Reflected harmonic levels in satu-
ration are significant.
Operation of this device beyond any one of these limits may cause permanent dam-
age. For reliable continuous operation, the device voltage and current must not
exceed the maximum operating values specified in the table on page one.
Bias Conditions should also satisfy the following expression:
I
D
V
D
<(T
J
-T
L
)/R
TH
, j-l
Typical Performance at Key Operating Frequencies
Parameter
Unit
100
MHz
500
MHz
850
MHz
1950
MHz
2400
MHz
17.0
32.2
19.0
13.5
10.5
22.0
Small Signal Gain
dB
23.0
22.5
21.5
18.5
Output Third Order Intercept Point
dBm
39.0
36.5
35.5
33.0*
Output Power at 1dB Compression
dBm
22.8
22.6
22.4
20.0
Input Return Loss
dB
13.5
14.5
15.5
15.0
Output Return Loss
dB
19.5
17.0
14.5
11.0
Reverse Isolation
dB
26.0
25.5
25.0
23.0
Noise figure
dB
2.7
2.7
2.8
3.3
Test Conditions: V
S
=8V, ID=115mA Typ., OIP
3
Tone Spacing=1MHz, P
OUT
per tone=0dBm, Bias Resistance=26Ω, T
L
=25°C, Z
S
=Z
L
=50Ω
*Note: An OIP
3
of +36dBm at 1950MHz is achieved using the tuned circuit
OIP
3
vs. Frequency over Temperature
V
D
=5.0V, I
D
=115 mA (Typ.) at T
LEAD
=+25°C
P
1dB
vs. Frequency over Temperature
V
D
=5.0V, I
D
=115 mA (Typ.) at T
LEAD
=+25°C
40.0
38.0
36.0
26.0
24.0
22.0
OIP
3
(dBm)
34.0
32.0
30.0
28.0
26.0
0
500
1000
1500
P
1dB
(dBm)
-40C
+25C
+85C
+25C Tuned Circuit
20.0
18.0
16.0
-40C
T
LEAD
14.0
12.0
T
LEAD
0
500
1000
1500
2000
+25C
+85C
2000
2500
2500
Frequency (MHz)
Frequency (MHz)
Noise Figure vs. Frequency over Temperature
V
D
=5.0V, I
D
=115 mA (Typ.) at T
LEAD
=+25°C
5.0
4.5
4.0
NF (dB)
3.5
3.0
2.5
2.0
1.5
1.0
0
500
1000
1500
2000
T
LEAD
-40C
+25C
+85C
Frequency (MHz)
2 of 6
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
DS100915
SGA7489Z
Typical RF Performance Over Temperature
(Bias: V
S
= 8.0 V, Bias Resistance=26 Ohms, I
D
= 115 mA )
|
S
|
vs. Frequency
21
|
S
|
vs. Frequency
11
30
0
-5
24
-10
|S
21
| (dB)
18
|S
11
| (dB)
+25°C
-40°C
+85°C
-15
-20
12
T
L
6
0
500
1000
1500
2000
Frequency (MHz)
-25
-30
T
L
0
500
1000
1500
2000
Frequency (MHz)
+25°C
-40°C
+85°C
2500
3000
2500
3000
|
S
|
vs. Frequency
12
|
S
|
vs. Frequency
22
-10
0
-5
-15
-10
|S
12
| (dB)
|S
22
| (dB)
-20
-15
-20
-25
T
L
-30
0
500
1000
1500
2000
Frequency (MHz)
+25°C
-40°C
+85°C
-25
-30
3000
0
500
T
L
1000
1500
2000
Frequency (MHz)
+25°C
-40°C
+85°C
2500
2500
3000
I
D
vs. V
D
Variation over Temperature
V
SUPPLY
= 8 V, Bias Resistance = 26 Ohms
150
140
130
I
D
(mA)
+85°C
+25°C
-40°C
Plot of V
D
vs. Temp. @ I
D
=115 mA
5.3
5.2
5.1
5.0
4.9
4.8
4.7
-40
120
110
100
90
80
4.70
V
D
(Volts)
4.80
4.90
5.00
V
D
(Volts)
5.10
5.20
5.30
-15
10
35
60
85
Temperature (°C)
DS100915
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
3 of 6
SGA7489Z
Pin
1
2, 4
3
Function
RF IN
GND
RF OUT/BIAS
Description
RF input pin. This pin requires the use of an external DC blocking capacitor chosen for the frequency of operation.
Connection to ground. Use via holes for best performance to reduce lead inductance as close to ground leads as possi-
ble.
RF output and bias pin. DC voltage is present on this pin, therefore a DC blocking capacitor is necessary for proper oper-
ation.
Application Schematic
Frequency (Mhz)
V
S
R
BIAS
1 uF
1000
pF
I
D
C
D
R
LDC
L
C
Reference
Designator
100
500
850
1950
2400
C
B
1000 pF
100 pF
470 nH
220 pF
100 pF
68 nH
100 pF
68 pF
33 nH
68 pF
22 pF
22 nH
56 pF
22 pF
18 nH
Bias
Inductor
C
D
L
C
RF in
C
B
1
SGA7489Z
3
2
4
Required Bias Resistance for I
D
=115mA
Bias Resistance = R
BIAS
+ R
LDC
= ( V
S
-V
D
) / I
D
V
D
RF out
C
B
Supply Voltage(V
S
)
Bias Resistance
7V
17
8V
26
9V
35
12 V
61
Bias resistor improves current stability over temperature.
Evaluation Board Layout
Mounting Instructions:
1. Solder the copper pad on the backside of the device package to the ground plane.
2. Use a large ground pad area with many plated through-holes as shown.
3. We recommend 1 or 2 ounce copper. Measurements for this data sheet were made on a 31mil thick FR-4 board with 1
ounce copper on both sides.
4 of 6
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
DS100915
SGA7489Z
Suggested Pad Layout
Preliminary
Package Drawing
Dimensions in inches (millimeters)
Refer to drawing posted at www.rfmd.com for tolerances.
DS100915
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
5 of 6
