PRELIMINARY DATA SHEET
SKY13268-344: GaAs SPDT Switch
300 kHz–3 GHz
Medium Power
1
Applications
Transceiver transmit-receive switching in GSM, CDMA, WCDMA,
WLAN, Bluetooth
®
, Zigbee
®
, land mobile radio base stations or
terminal equipment
●
General purpose medium power switch in telecommunications
applications
●
J
2
C
BL
GND
5
2
V
1
J
1
6
C
BL
V
2
4
3
J
3
C
BL
DC blocking capacitors (C
BL
) must be supplied externally for positive voltage operation.
C
BL
= 100 pF for operation >500 MHz.
Features
Broadband: 300 kHz - 3 GHz
●
Low insertion loss: 0.3 dB @ 900 MHz
●
P
1 dB
: +30 dBm typical @ 3 V
●
Low distortion: IP3 +43 dBm @ 3 V
●
Low current consumption: < 100 A @ 3 V
●
Ultraminiature SOT-666 6 lead package
●
Figure 1. Function Block Diagram
Description
The SKY13268-344 is a monolithic SPDT switch fabricated using
Skyworks Solutions’ proprietary GaAs pHEMTs as the switching
elements. This wideband switch operates with RF signals from
300 kHz to 3 GHz. The RF signal paths within the SKY13268-344
are fully bilateral. Ports J
2
and J
3
, RF input/output terminals
are reflective.
Switching is controlled via two control voltage inputs, which are
compatible with CMOS logic levels. Depending upon the logic
voltage level applied to the
control voltage pin, the Common RF pin, J
1
, is connected to one
of two switched RF pins (J
2
or J
3
) via a low insertion loss path,
while the path between the RF common and the other RF pin is
in its high isolation state.
DC power consumption is very low, 100 µA maximum with con-
trol voltage of 3 V. The switch can operate over the temperature
range of -40 °C to 85 °C.
An evaluation board is available upon request.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
200037 Rev. B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • November 8, 2004
1
PRELIMINARY DATA SHEET • SKY13268-344
Table 1. Electrical Specifications (V
CTL
= 0 V/3 V, T = 25° C, P
INPUT
= 0 dBm, Z
O
= 50
Ω,
unless otherwise noted)
Parameter
Insertion loss
Frequency
(2)
300 kHz–1.0 GHz
1.0–2.0 GHz
2.0–3.0 GHz
300 kHz–1.0 GHz
1.0–2.0 GHz
2.0–3.0 GHz
300 kHz–1.0 GHz
1.0–2.0 GHz
2.0–3.0 GHz
20
20
20
Min.
Typ.
0.3
0.4
0.4
25
25
23
1.3:1
1.3:1
1.3:1
1.4:1
1.4:1
1.4:1
Max.
0.4
0.5
0.6
Unit
dB
dB
dB
dB
dB
dB
Isolation
VSWR
Table 2. Operating Characteristics (V
CTL
= 0 V/3 V, T = 25° C, P
INPUT
= 0 dBm, Z
O
= 50
Ω,
unless otherwise noted)
Parameter
Switching characteristics
Rise, fall
On, off
Video feedthru
Input power for 1 dB compression
Intermodulation intercept point (IP3)
Condition
10/90% or 90/10% RF
50% CTL to 90/10% RF
Pulse rise time = 1 ns,
Measurement BW = 500 MHz
V
LOW
= 0 V, V
HIGH
= 3 V
V
LOW
= 0 V, V
HIGH
= 5 V
For two-tone input power +5 dBm
V
LOW
= 0 V, V
HIGH
= 3 V
V
LOW
= 0 V, V
HIGH
= 5 V
V
LOW
= 0 @ 20 µA max.
V
HIGH
= +3 V @ 100 µA max. to +5 V @ 200 µA max.
0.5–3.0 GHz
0.5–3.0 GHz
0.5–3.0 GHz
0.5–3.0 GHz
Frequency
Min.
Typ.
36
58
25
+30
+34
+43
+50
25
Max.
Unit
ns
ns
mV
dBm
dBm
dBm
dBm
°C/W
Thermal resistance
Control voltages
Table 3. Absolute Maximum Ratings
Characteristic
Control voltage range
RF input power
Storage temperature range
Operating temperature range
Value
-0.2
≤
V
C
≤
8 V
6 W for f > 500 MHz,
V
CTL
= 0/7 V
-65 °C to +150 °C
-40 °C to +85 °C
Performance is guaranteed only under the conditions listed in the specifications table and is
not guaranteed under the full range(s) described by the Absolute Maximum specifications.
Exceeding any of the absolute maximum/minimum specifications may result in permanent
damage to the device and will void the warranty.
CAUTION:
Although this device is designed to be as robust as
possible, Electrostatic Discharge (ESD) can damage
this device. This device must be protected at all times
from ESD. Static charges may easily produce poten-
tials of several kilovolts on the human body or
equipment, which can discharge without detection.
Industry-standard ESD precautions must be employed
at all times.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
2
November 8, 2004 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • 200037 Rev. B
PRELIMINARY DATA SHEET • SKY13268-344
Typical Performance Data (0, +3 V)
0
-0.2
-10
-15
J
1
–J
2
J
1
–J
3
Insertion Loss (dB)
J
1
–J
2
-20
Isolation (dB)
2.5
3.0
-0.4
-0.6
-0.8
-1.0
0
0.5
1.0
1.5
-25
-30
-35
-40
-45
-50
J
1
–J
3
2.0
0
0.5
1.0
1.5
2.0
2.5
3.0
Frequency (GHz)
Figure 2. Insertion Loss vs. Frequency
Frequency (GHz)
Figure 3. Isolation vs. Frequency
1.5
1.4
1.3
1.2
J
1
–J
2
1.1
1.0
0
0.5
1.0
1.5
2.0
2.5
3.0
J
1
–J
3
4X
8° Min.
10° Nom.
12° Max.
0.53 Min.
0.57 Nom.
0.60 Max.
0.13 Min.
0.17 Nom.
0.18 Max.
All dimensions are in mm.
1.50 Min.
1.66 Nom.
1.70 Max.
1.50 Min.
1.65 Nom.
1.70 Max.
Pin 1
C
L
0.10 Min.
0.23 Nom.
0.30 Max.
0.17 Min.
0.25 Max.
C
L
0.05 Min.
0.10 Max.
0.50 BSC.
0.27 Nom.
0.34 Max.
C
L
6X
0.11 Min.
0.19 Nom.
0.26 Max.
C
L
0.20 Min.
0.83 Ref.
1.10 Min.
1.20 Nom.
1.30 Max.
VSWR
Frequency (GHz)
Figure 4. VSWR vs. Frequency
Table 4. Truth Table
1
V
1
V
HIGH
0
0
V
HIGH
3 V
≤
V
HIGH
≤
5 V.
Figure 5. SOT-666 Package Outline
V
2
0
V
HIGH
0
V
HIGH
J
1
–J
2
Isolation
Insertion loss
Not allowed
Not allowed
J
1
–J
3
Insertion loss
Isolation
Not allowed
Not allowed
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
200037 Rev. B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • November 8, 2004
3
PRELIMINARY DATA SHEET • SKY13268-344
Table 5. Pin Descriptions
Pin Number
1
2
3
4
5
6
Pin Name
J
2
GND
J
3
V
2
J
1
V
1
Description
RF input/output – RF input or output port which is either connected via a low insertion loss path to RF Common (J
1
)
or isolated from RF common, according to the logic levels applied to V
1
and V
2
Equipotential point – Equipotential point for control voltage and RF circuits. Must be connected to PCB ground via
lowest possible impedance
RF input/output – RF input or output port which is either connected via a low insertion loss path to RF Common (J
1
)
or isolated from RF Common, according to the logic levels applied to V
1
and V
2
Control voltage – Control voltage input #2
RF common input/output – RF input/output port that is connected via low insertion loss path to either RF1 or RF2,
depending upon the voltage applied to control voltage pin
Control voltage – Control voltage input #1
Evaluation Board
The evaluation board for SKY13268-344 allows the part to be
fully exercised. The insertion loss of the transmission lines
between J
1
- U1 and U1 - J
2
/J
3
can be determined by measuring
the performance of the calibration through line, which contains
two DC block capacitors in identical positions to the of the DC
blocks present in the main circuit.
The state of the SKY13268-344 is controlled by applying the
appropriate logic level voltages to ports V
1
and V
2
, per Table 4.
C
1
100 pF
C
3
100 pF
J
1
Table 6. Evaluation Board Components
Component
C
1
–C
5
U1
J
1
, J
2
, J
3
, J
4
, J
5
Description
DC blocking capacitor
SKY13268-344 GaAs SPDT
SMA connectors
Default
100 pF, size 0402
J
2
V
1
J
3
C
2
100 pF
U1
V
2
J
4
C
4
100 pF
C
5
100 pF
J
5
Calibration
Through Line
Figure 6. SKY13268-344 Evaluation Circuit
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
200037 Rev. B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • November 8, 2004
4
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