Features
1 of 10
Optimum Technology
Matching® Applied
GaAs HBT
InGaP HBT
GaAs MESFET
SiGe BiCMOS
Si BiCMOS
SiGe HBT
GaAs pHEMT
Si CMOS
Si BJT
GaN HEMT
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.
Product Description
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
InP HBT
CGA-3318Z
DUAL CATV BROADBAND HIGH LINEARITY
SiGe HBT AMPLIFIER
RFMD’s CGA-3318Z is a high performance Silicon Germanium HBT MMIC Amplifier.
Designed with SiGe process technology for excellent linearity at an exceptional
price. A Darlington configuration is utilized for broadband performance. The hetero-
junction increases breakdown voltage and minimizes leakage current between
junctions. The CGA-3318Z contains two amplifiers for use in wideband Push-Pull
CATV amplifiers requiring excellent second order performance. The second and
third order non-linearities are greatly improved in the push-pull configuration.
1
2
3
4
8
7
6
5
Amplifier Configuration
Lead-Free, RoHS Compliant,
and Green Packaging
Excellent CSO/CTB/XMOD
Performance at +34dBmV
Output Power Per Tone
Dual Devices in Each SOIC-8
Package Simplify Push-Pull
Configuration PC Board Lay-
out
5MHz to 900MHz Operation
Applications
CATV Head End Driver and
Predriver Amplifier
CATV Line Driver Amplifier
DS120502
Package: ESOP-8
CGA-3318Z
Dual CATV
Broadband
High Linearity
SiGe HBT
Amplifier
Parameter Specification Unit Condition
Min. Typ. Max.
Small Signal Gain 13.2 dB 5MHz
12.5 dB 50MHz and 500MHz
10.0 12.0 dB 870MHz
OIP2, Tone Spacing=1MHz 69.0 dBm 50MHz, POUT per tone=+6dBm
71.5 dBm 250MHz, POUT per tone
67.0 69.0 dBm 500MHz, POUT per tone
OIP3, Tone Spacing=1MHz 36.5 dBm 50MHz, POUT per tone=+6dBm
38.0 dBm 500MHz, POUT per tone=+6dBm
36.0 38.0 dBm 870MHz, POUT per tone=+6dBm
Output Power at 1dB Compression 20.0 dBm 50MHz
21.0 dBm 500MHz
18.6 20.6 dBm 870MHz
Input Return Loss 17.0 dBm 500MHz
10 dBm 50 - 870 MHz
Output Return Loss 12.0 dB 500MHz
10 dB 50 - 870MHz
Noise Figure 4.2 dB 50MHz, Balun Insertion Loss Included
4.3 dB 500MHz, Balun Insertion Loss Included
5.0 6.0 dB 870MHz, Balun Insertion Loss Included
Device Operating Voltage 3.9 4.1 4.3 V
Device Operating Current 135 150 165 mA
Thermal Resistance 50 °C/W (Junction to Lead)
2 of 10 DS120502
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
CGA-3318Z
Absolute Maximum Ratings
Parameter Rating Unit
Max Device Current (ID)225mA
Max Device Voltage (VD) 6 V
Max RF Input Power +18 dBm
Max Junction Temp (TJ) +150 °C
Operating Temp Range (TL) -40 to +85 °C
Max Storage Temp +150 °C
ESD Rating - Human Body Model
(HBM) 1B Class
Moisture Sensitivity Level 3 MSL
*Note: Load condition1, ZL=50. Load condition2, ZL=10:1 VSWR.
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:
IDVD<(T
J-TL)/RTH, j-l and TL=TLEAD
Parameter Specification Unit Condition
Min. Typ. Max.
Worst Case Over Band, CSO 70 dBc 79 Ch., Flat, +34dBmV
Worst Case Over Band, CTB 68 dBc 79 Ch., Flat, +34dBmV
Worst Case Over Band, XMOD 63 dBc 79 Ch., Flat, +34dBmV
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.
Typical RF Performance: VS=8V, ID=150mA @ TL=+25°C, RBIAS=51 Ohms, Push-Pull Configuration
Gain vs. Frequency
6
8
10
12
14
16
0 100 200 300 400 500 600 700 800 900 1000
Frequency (MHz)
|S21| (dB)
+25°C
-40°C
+85°C
Input Return Loss vs. Frequency
-30
-25
-20
-15
-10
-5
0
0 100 200 300 400 500 600 700 800 900 1000
Frequency (MHz)
|S11| (dB)
+25°C
-40°C
+85°C
Output Return Loss vs. Frequency
-20
-18
-16
-14
-12
-10
-8
-6
-4
-2
0
0 100 200 300 400 500 600 700 800 900 1000
Frequency (MHz)
|S22| (dB)
+25°C
-40°C
+85°C
3 of 10DS120502
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
CGA-3318Z
Typical RF Performance: V
S
=8V, I
D
=150mA @ T
L
=+25°C, R
BIAS
=51 Ohms, Push-Pull Configuration
IP3 vs. Temperature
20
25
30
35
40
45
50
0 0.2 0.4 0.6 0.8 1
Frequency (GHz)
IP3 (dBm)
-40C
25C
85C
IP2 vs. Temperature
50
55
60
65
70
75
80
0 0.2 0.4 0.6 0.8 1
Frequency (GHz)
IP2 (dBm)
-40°C
+25°C
+85°C
Second Harmonic vs. Pout and Frequency
Data shown is typical at 25C
20
30
40
50
60
70
80
90
100
0 3 6 9 12 15
Pout (dBm)
IM2 (dBc)
66MHz
100MHz
250MHz
500MHz
Third Harmonic vs. Pout and Frequency
Data shown is typical at 25C
20
30
40
50
60
70
80
90
100
03691215
Pout (dBm)
IM3 (dBc)
66MHz
100MHz
250MHz
500MHz
Push-Pull Noise Figure
50MHz-900MHz Typical
0
1
2
3
4
5
6
0 200 400 600 800 1000
Frequency (MHz)
NF (dB)
Push-Pull CTB/CSO/XMOD
34 dBmV/Ch., 79 Ch., Flat
40
50
60
70
80
90
100
0 100 200 300 400 500 600
Frequency (MHz)
dBc
CTB CSO-
CSO+ Xm o d
4 of 10 DS120502
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
CGA-3318Z
CSO/CTB/XMOD Performance:
VS=8V, ID=150mA @ TL=+25°C, RBIAS=51 Ohms, Push-Pull Config, 79 Ch. Flat Analog, No Digital Channels.
Push-Pull CTB vs. Pout and Frequency
40
50
60
70
80
90
100
0 100 200 300 400 500 600
Frequency (MHz)
dBc
32dBmV 34dBmV 36dBmV
38dBmV 40dBmV 42dBmV
Push-Pull XMOD vs. Pout and Frequency
40
50
60
70
80
90
100
0 100 200 300 400 500 600
Frequency (MHz)
dBc
32dBmV 34dBmV 36dBmV
38dBmV 40dBmV 42dBmV
Push-Pull CSO- vs. Pout and Frequency
40
50
60
70
80
90
100
0 100 200 300 400 500 600
Frequency (MHz)
dBc
32dBmV 34dBmV 36dBmV
38dBmV 40dBmV 42dBmV
Push-Pull CSO+ vs. Pout and Frequency
40
50
60
70
80
90
100
0 100 200 300 400 500 600
Frequency (MHz)
dBc
32dBmV 34dBmV 36dBmV
38dBmV 40dBmV 42dBmV
Note: CSO measurements > 85 dBc can be limited by system noise.
5 of 10DS120502
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
CGA-3318Z
Typical RF Performance - Single Ended - 50 Ohm System
VS=8V, ID=75mA (one amp biased), TL=+25°C, RBIAS=51 Ohms
Typical RF Performance - Single Ended - 37.5 Ohm System
VS=8V, ID=75mA (one amp biased), TL=+25°C, RBIAS=51 Ohms
Gain & Isolation vs. Frequency
0
2
4
6
8
10
12
14
16
0.00.51.01.52.02.53.03.54.0
Frequency (GHz)
Gain (dB)
-32
-28
-24
-20
-16
-12
-8
-4
0
Isolation (dB)
Isolation
Gain
|S11| & |S22| vs. Frequency
-40
-35
-30
-25
-20
-15
-10
-5
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Frequency (GHz)
dB
|S11|
|S22|
Gain & Isolation vs. Frequency
0
2
4
6
8
10
12
14
16
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Frequency (GHz)
Gain (dB)
-32
-28
-24
-20
-16
-12
-8
-4
0
Isolation (dB)
Gain
Isolation
|S11| & |S22| vs. Frequency
-40
-35
-30
-25
-20
-15
-10
-5
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Frequency (GHz)
dB
|S11|
|S22|
6 of 10 DS120502
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
CGA-3318Z
50MHz to 870MHz Application Circuit Schematic
50MHz to 870MHz Evaluation Board Layout
CGA-3318
SOIC-08
1000 pF
0.01 PF 1000pF 68pF
Vs
RBIAS
Amp 1
1000 pF
1000 pF
1000 pF
220 nH
Macom
ETC1-1-13
Macom
ETC1-1-13
1PF Tant.
1PF Tant. 0.01 PF 1000pF 68pF
220 nH
Vs
RBIAS
Amp 2
1
4
8
5
6,72,3
ECB-101611 Rev A
ESOP-8
Push-Pull
Eval Board
RF OUTPUT
RF INPUT
.01uF
1000pF
68pF
220nH
220nH
68pF
1000pF
.01uF
1000pF
1000pF
1000pF
1000pF
Balun ETC1-1-13 Balun ETC1-1-13
Rbias
Rbias
1uF Tant.
1uF Tant.
7 of 10DS120502
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
CGA-3318Z
5MHz to 210MHz Application Circuit Schematic
5MHz to 100MHz Evaluation Board Layout
CGA-3318
SOIC-08
0.01 PF
0.01 PF 1000pF 68pF
V
s
RBIAS
Amp 1
0.01 PF
0.01 PF
0.01 PF
10 P+
Macom
ETC1-1T
Macom
ETC1-1T
1PF Tant.
1PF Tant. 0.01 PF 1000pF 68pF
10 P+
V
s
RBIAS
Amp 2
1
4
8
5
6,72,3
ECB-101611 Rev A
ESOP-8
Push-Pull
Eval Board
RF OUTPUT
RF INPUT
.01uF
1000pF
68pF
10uH
10uH
68pF
1000pF
.01uF
0.01uF
0.01uF
0.01uF
0.01uF
Balun ETC1-1T Balun ETC1-1T
Rbias
Rbias
1uF Tant.
1uF Tant.
8 of 10 DS120502
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
CGA-3318Z
2(VS-VD)
ID
RBIAS=
Supply Voltage (VS)8V 9V 12V 15V
RBIAS 51 ::
RBIAS Power Rating 1/2W 1/2W 1W 1W
Recommended Bias Resistor Values for ID= 150mA
Typical 5-100 MHz RF Performance: VS=8V, ID=150mA @ TL=+25°C, Push-Pull Configuration
Return Loss vs. Frequency
-30
-25
-20
-15
-10
-5
0
0 102030405060708090100
Frequency (MHz)
|S11| and |S22| (dB)
|S11|
|S22|
Gain vs. Frequency
6
8
10
12
14
16
0 102030405060708090100
Frequency (MHz)
|S21| (dB)
P1dB and IP3 vs. Frequency
16
17
18
19
20
21
22
0 102030405060708090100110
Frequency (MHz)
P1dB (dBm)
34
35
36
37
38
39
40
IP3 (dBm)
P1dB
IP3
Noise Figure vs. Frequency
0
1
2
3
4
5
6
7
8
0 102030405060708090100110
Frequency (MHz)
NF (dB)
9 of 10DS120502
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
CGA-3318Z
Device Pin Out
Suggested Pad Layout
Pin Function Description
1RF IN
Device 1. RF input pin. This pin requires the use of an external DC-blocking capacitor as shown in the schematic.
2, 3 GND Connection to ground. Use via holes for best performance to reduce lead inductance as close to ground leads as
possible.
4RF IN
Device 2. RF input pin. This pin requires the use of an external DC-blocking capacitor as shown in the schematic.
5RF OUT/VCC
Device 2. RF output and bias pin. Bias should be supplied to this pin through an external series resistor and RF
choke inductor. Because DC biasing is present on this pin, a DC-blocking capacitor should be used in most appli-
cations. The supply side of the bias network should be well bypassed.
6, 7 GND Same as pins 2 and 3.
8RF OUT/VCC
Device 1. Same as pin 5.
EPAD GND Exposed area on the bottom side of the package must be soldered to the ground plane of the board for optimum
thermal and RF performance. Several vias should be located under the EPAD as shown in the recommended
land pattern.
1
2
3
4
8
7
6
5
PCB Pad Layout
Dimensions in inches [millimeters]
Sized for 31 mil thick FR-4
10 of 10 DS120502
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
CGA-3318Z
Package Drawing and Marking
Dimensions in inches (millimeters)
Refer to drawing posted at www.rfmd.com for tolerances.
Ordering Information
Part Number Description Reel Size Devices/Reel
CGA3318ZSB 5pcs Sample Bag N/A N/A
CGA3318ZSQ 25pcs Sample Bag N/A N/A
CGA3318ZSR Dual CATV Broadband HBT AMP 7” 100pcs
CGA3318Z Dual CATV Broadband HBT AMP 7” 500pcs
CGA3318ZPCK-410 50MHz to 870MHz Eval Bd & 5 Loose Pieces N/A N/A
CGA3318ZPCK-411 5MHz to 100MHz Eval Bd & 5 Loose Pieces N/A N/A
Lot Code
CGA3318
Lot Code
CGA3318Z
Lead FreeTin-Lead
