CGA-6618 Datasheet, PDF (6/8 Pages) Stanford Microdevices – DUAL CATV BROADBAND HIGH LINEARITY GAAS HBT AMPLIFIER

CGA-6618 Dual GaAs HBT Amplifier
Pin # Function
Description
1
RF IN RF input pin. This pin requires the use of an external DC blocking capacitor as shown in
Device 1 the schematic.
2,3,6,7
Ground
Connection to ground. Use via holes for best performance to reduce lead inductance
as close to ground leads as possible.
4
RF IN
Device 2
Same as pin 1
RF output and bias pin. Bias should be supplied to this pin through an external series
5
RF OUT / Vcc resistor and RF choke inductor. Because DC biasing is present on this pin, a DC
Device 2 blocking capacitor should be used in most applications (see application schematic). The
supply side of the bias network should be well bypassed.
8
RF OUT / Vcc
Device 1
Same as pin 5
EPAD
Ground
Exposed area on the bottom side of the package must be soldered to the ground plane
of the board for proper thermal and RF performance. Several vias should be located
under the EPAD as shown in the recommended land pattern on page 5.
Device Pin Out
1
8
2
7
3
6
4
5
Basic Application Schematic 50-870 MHz
Vs
1µF Tant. 0.01µF 1000pF 68pF
RBIAS
Macom
ETC1-1-13
1
1000 pF
2,3
Amp 1
220 nH
8
1000 pF
6,7
1000 pF
4
Amp 2
Macom
1000 pF ETC1-1-13
5
CGA-6618
SOIC-08
220 nH
1µF Tant. 0.01µF 1000pF 68pF
RBIAS
Vs
R ecommended B ias R esistor Values for
I_D=150m A
R _BIAS=2 ( V _S-V _D ) / I_D
S upply Voltage(V_S) 8 V
9 V 12 V 15 V
R _{B IA S}
33
47
82
120
Note: R provides D C bias stability over temperature.
B IA S
Part Identification Marking
Evaluation Board Layout 50-870 MHz
Rbias
RF INPUT
Balun ETC1-1-13
1000pF
1uF Tant.
RF OUTPUT
.01uF
1000pF
68pF
220nH
1000pF
Balun ETC1-1-13
1000pF
1000pF
220nH
68pF
1000pF
.01uF
ECB-101611 Rev A
1uF Tant.
ESOP-8
Push-Pull
Rbias
Eval Board
PCB Recommendations
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. Measurement
for this data sheet were made on a 31 mil thick FR-4
board with 1 ounce copper on both sides.
Caution: ESD sensitive
Appropriate precautions in handling, packaging
and testing devices must be observed.
CGA-6618
CGA-6618Z
Part Number Ordering Information
Part Number
CGA-6618
CGA-6618Z
Reel Size
7"
7"
Devices/Reel
500
500
303 S. Technology Ct., Broomfield, CO 80021
Phone: (800) SMI-MMIC
6
http://www.sirenza.com
EDS-101994 Rev J