DATA SHEET • SKY65450-92LF: 40 MHz TO 1 GHz BROADBAND 75 Ω CATV LNA WITH BYPASS MODE
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
4 November 14, 2017 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 203094H
Evaluation Board Description
The Skyworks SKY65450-92LF Evaluation Board is used to test
the performance of the SKY65450-92LF low-noise amplifier.
Figure 3 shows an application schematic for the SKY65450-92LF.
An assembly drawing for the Evaluation Board is shown in
Figure 4, and the layer detail physical characteristics are noted in
Figure 5. Typical part marking is shown in Figure 6.
Capacitor C5 provides DC bias decoupling for the output stage
collector voltage. Pins 6 and 1 are the RF input and output
signals, respectively.
External DC blocking is provided on the input and output by
capacitors C1 and C2. Ground pin 5 and the center ground pad
provide the DC and RF ground. Resistor R1 is the bias resistor that
can be used to optimize the current and performance of the LNA
and L1 is a choke inductor which connects the Vcc to the output
stage of the LNA. Pin 2 provides an enable function and has an
optional RC circuit held in place by resistor R2 and capacitor C3.
Pin 3 is a no connect pin and can be left floating or may be
grounded.
The input and output RF traces are 75 Ω traces.
RF Output
Header 4
U1
RF Input
P1
6
5
4
3
2
1
VCC
VEN
U1_3
C2
10 nF
C5
10 nF
C4
10 μF
U1_3
75 Ω trace
J1
R1
6 Ω
VCC
L1
Bead (1.5 KΩ)
RFOUT
VCC
N/C
RFIN
GND
EN
2
1
3
4
5
6
C1
10 nF
75 Ω trace
J2
R2
1.8 KΩ
C3
10 nF
VEN
203094E-003
Figure 3. SKY65450-92LF Application Schematic
