
Skyworks Solutions, Inc. Phone [781] 376-3000 Fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com
200504 Rev. D Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice. March 30, 2007
1
SKY13278-313LF: GaAs SPDT Switch 100 MHz–2.5 GHz
DATA SHEET
Features
G
Broadband: 100 MHz–2.5 GHz
G
Very low insertion loss: 0.4 dB typ. @ 900 MHz
G
High isolation: 26 dB typ. @ 900 MHz
G
Low current consumption: <100 A @ 3 V
G
Miniature QFN-6 2 x 3 mm package
G
Lead (Pb)-free and RoHS-compliant MSL-1 @ 260 °C per
JEDEC J-STD-020
Function Block Diagram
V1
J1
V2
J2
J3
Description
The SKY13278-313LF is a pHEMT GaAs FET IC high linearity SPDT
switch. This wideband switch has been designed for use from
100 MHz to 2.5 GHz, where extremely high linearity, low control
voltage, high isolation, low insertion loss and ultra-miniature
package size are required. It can be controlled with positive,
negative or a combination of both voltages. The RF signal paths
within the SKY13278-313LF are fully bilateral.
Some standard implementations include T/R switching and diver-
sity switching over 3 W. The SKY13278-313LF switch can be used
in many analog and digital wireless communication systems
including cellular, GSM and UMTS applications.
Switching is controlled via two control voltage inputs. Depending
upon the voltage level applied to the control voltage pins, the
common RF port (J1) is connected to one of two RF ports (J2 or J3)
via a low insertion loss path, while the path between J1 and the
other RF port is in its isolation state. When the control voltages are
toggled, the states between J1 and J2, as wells as J1 and J3, are
also toggled.
The SKY13278-313LF is available in a lead(Pb)-free, RoHS-com-
pliant, QFN-6 2 x 3 mm plastic package.
An evaluation board is available upon request.
Parameter
Frequency
Min.
Typ.
Max.
Unit
Insertion loss
0.1–0.5 GHz
0.40
0.5
dB
0.5–1.0 GHz
0.40
0.5
dB
1.0–2.0 GHz
0.45
0.6
dB
2.0–2.5 GHz
0.55
0.7
dB
Isolation
0.1–0.5 GHz
29
32
dB
0.5–1.0 GHz
23
26
dB
1.0–2.0 GHz
17
20
dB
2.0–2.5 GHz
15
18
dB
Return loss (insertion loss state)
0.1–0.5 GHz
20
dB
Lower frequency return loss is dependent on DC blocks
1.0–2.0 GHz
20
dB
Electrical Specifications
VCTL = 0/3 V, T = 25 °C, PINPUT = 0 dBm, Z0 = 50 unless otherwise noted
Skyworks offers lead (Pb)-free, RoHS (Restriction of
Hazardous Substances)-compliant packaging.
NEW