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PRELIMINARY DATA SHEET
AS179-000: GaAs SPDT Switch 300 kHz-3 GHz Medium Power
Applications
General purpose medium power switch in telecommunication applications Transceiver transmit-receive switch in 802.11b/g WLAN, etc., systems
Functional Block Diagram
CBL RF1 J2 Ground CBL V1 J1 Control Voltage 1 CBL RF Common
Features
Broadband: 300 kHz-3 GHz Low insertion loss: 0.3 dB @ 900 MHz High isolation: 25 dB @ 900 MHz P 1 dB: +30 dBm @ 3 V control voltage IP3: +43 dBm @ 3 V control voltage Low DC power consumption 100% RF tested in die form Lead (Pb)-free ESD class 0

RF2
J3
V2
Control Voltage 2
DC blocks required on all RF ports for positive control voltage operation.
Absolute Maximum Ratings
Characteristic RF input power (VCTL 0 V/7 V) Value 6 W, f > 500 MHz 2 W, 100 > f > 500 MHz 315 mW, f = 300 kHz(1) -0.2 V VC 8 V -40 C to +85 C -40 C to +150 C
Control voltage range Operating temperature range Storage temperature range
Description
The AS179-000 is a monolithic SPDT switch fabricated using Skyworks proprietary GaAs PHEMTs as the switching elements. This wideband switch operates with RF signals from 300 kHz-3 GHz. The RF signal paths within the AS179-000 are bilateral. The J1 and J2 RF input/output terminals are reflective. Switching is controlled via a pair of high-impedance control voltage inputs. Depending upon the logic voltage level applied to the control voltage pins, the common RF pin (J1) is connected to one of two switched RF pins (J2 or J3) 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 A nominal with control voltage of 3 V. The switch can operate over the temperature range of -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. 1. Derate linearly for 300 kHz < f < 100 MHz.
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 potentials of several kilovolts on the human body or equipment, which can discharge without detection. Industry-standard ESD precautions must be employed at all times.
NEW
Skyworks offers lead (Pb)-free "environmentally friendly" packaging that is RoHS compliant (European Parliament for the Restriction of Hazardous Substances).
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
200078 Rev. A * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * February 17, 2005
1
PRELIMINARY DATA SHEET * AS179-000
Electrical Specifications at 25 C
Parameter Insertion loss Frequency 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-3.0 GHz 22 20 20 Min. Typ. 0.30 0.30 0.35 25 22 22 1.1:1 1.3:1 Max. 0.4 0.4 0.5 Unit dB dB dB dB dB dB
Isolation
VSWR(1)
VCTL = 0 V/3 V, T = 25 C, PINPUT = 0 dBm, ZO = 50 , unless otherwise noted. 1. Insertion loss state.
Operating Characteristics at 25 C
Parameter Switching characteristics Condition Rise, fall (10/90% or 90/10% RF) On, off (50% CTL to 90/10% RF) Video feedthru (TRISE = 1 ns, measurement BW = 500 MHz) VCTL = 0/3 V VCTL = 0/5 V For two-tone input power +5 dBm VCTL = 0/3 V VCTL = 0/5 V VLOW = 0 to 0.2 V @ 20 A max. VHIGH = 3 V @ 100 A max. to 5 V @ 100 A max. 0.5-3.0 GHz 0.5-3.0 GHz 0.5-3.0 GHz 0.5-3.0 GHz Frequency Min. Typ. 10 20 25 30 34 43 50 15 Max. Unit ns ns mV dBm dBm dBm dBm C/W
Input power for 1 dB compression (IP1 dB) Input Intermodulation intercept point (IIP3)
JC Control voltages
VCTL = 0 V/3 V, T = 25 C, PINPUT = 0 dBm, ZO = 50 , unless otherwise noted.
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com 2
February 17, 2005 * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * 200078 Rev. A
PRELIMINARY DATA SHEET * AS179-000
Typical Performance Data
0 -0.1 -10 -15 -20 -25 J2 J3
Insertion Loss (dB)
Isolation (dB)
J1-J2
-0.2 -0.3 -0.4 -0.5 -0.6 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 J1-J3
-30 -35 -40 -45 -50 -55 -60 0 0.5 1.0 1.5 2.0 2.5 3.0
3.5
4.0
Frequency (GHz)
Frequency (GHz)
Insertion Loss vs. Frequency
1.3
Isolation vs. Frequency
Die Outline
0.0126 (0.32 mm) 0.0244 (0.62 mm) 0.0220 (0.56 mm) V1 0.0209 (0.53 mm) J2 GND J1 V2 0.0159 (0.40 mm) 0.0183 (0.47 mm)
1.2
VSWR
ILJ2 1.1 ILJ3
ILJ3
ILJ2 1.0 0 0.5 1.0 1.5 2.0 2.5 2.5 3.0 3.0
Frequency (GHz)
VSWR vs. Frequency
0.0098 (0.25 mm)
0.0024 (0.06 mm) 0.000 0.000
J3
GND
0.0024 (0.06 mm)
0.0121 (0.31 mm)
Bond pad dimensions: 0.0022 (0.06 mm) square. Bond pad metalization: Gold. Backside metalization: None. Die thickness 0.008 0.001 (0.203 0.025). Dimensions in inches (mm).
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
200078 Rev. A * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * February 17, 2005
0.0149 (0.38 mm)
3
PRELIMINARY DATA SHEET * AS179-000
Port Descriptions
Parameter J1 J2, J3 V1, V2 GND Description RF Common -- RF input/output port that is connected via low impedance path to either RF1 or RF2, depending upon the voltage applied to control voltage pin. External DC block required for positive control voltages. RF Input/Output -- RF input/output port that is connected via low impedance path to either RF common (J1) or to ground, depending upon the voltage levels applied to Control Voltage pins. External DC block required for positive control voltages. Control Voltage Inputs -- Combination of voltage logic levels applied to these pins determine the state of the RF paths between J1 and J2/J3. Ground -- Should be down-bonded to circuit ground
Truth Table
VCTL1 VHIGH 0 0 VHIGH VCTL2 0 VHIGH 0 VHIGH J1-J2 Isolation Insertion loss Not allowed Not allowed J1-J3 Insertion loss Isolation Not allowed Not allowed
Simplified Block Diagram
RF Common (J1) Q2 Q3
RF1 (J2)
RF2 (J3)
Theory of Operation
The AS179-000 Single Pole Double Throw (SPDT) switch comprises two RF signal paths, one of which connects the RF common pin (J1) to RF1 (J2) and the other connects RF common to RF2 (J3). Depending upon the logic voltage levels applied to the control voltage pins (V1 and V2), one of these paths is in its minimum insertion loss state while the other is in its high isolation state. When these logic levels are toggled, the state of each of the paths toggles accordingly. Starting at the RF common pin, each signal path is comprised of a depletion mode PHEMT, Q2 or Q3, in series with the signal path, followed by another depletion mode PHEMT, Q1 or Q4, in shunt with the signal path. A HI logic level applied to the control voltage pin V1 and a low logic level applied to the control voltage pin V2 forces the path between RF common and RF1 into its high isolation state and the other path, from RF common to RF2, into its low insertion loss state. The shunt PHEMT to common, Q1 or Q4, is biased to produce minimum impedance when the signal path of which it is part is placed into its isolation state. Consequently, the magnitude of the reflection coefficient looking into this pin is close to 1, that is, the VSWR looking into that port approaches infinity. The AS179-000 can operate with control voltage from 3 V up to 5 V. The logic threshold voltage for the control voltage pin is one half of the minimum high control voltage. The impedance looking into each of the control voltage pins is several tens of kilohms. For positive control voltage, DC blocks are required on each RF port.
Q1
Q4
Control Voltage 2
Control Voltage 1
Applications
The AS179-000 SPDT switch can be used in a number of ways: it can be used to select one of two loads, it can also be used to alternately connect an antenna to a radio transmitter and receiver, etc.
Transmit Receive Switch
A SPDT switch can be used as a transmit-receive (TR) switch, to alternately connect a transmitter and a receiver to a single antenna in a single duplex system.
Low Noise Amplifier
Downconverter Mixer IF Output
AS179-000 SPDT TR Switch
LO
IF or BB Input Power Amplifier Upconverter Mixer
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com 4
February 17, 2005 * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * 200078 Rev. A
PRELIMINARY DATA SHEET * AS179-000
Ordering Information
Model Name AS179-000 GaAs SPDT switch Operating Temperature Range -40 C to +85 C Ordering Part Number AS179-000 Package Description Wafer on plastic-ring film frame
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com
200078 Rev. A * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * February 17, 2005
5
PRELIMINARY DATA SHEET * AS179-000
Copyright (c) 2002, 2003, 2004, 2005, Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. ("Skyworks") products. These materials are provided by Skyworks as a service to its customers and may be used for informational purposes only by the customer. Skyworks assumes no responsibility for errors or omissions in these materials. Skyworks may make changes to its documentation, products, specifications and product descriptions at any time, without notice. Skyworks makes no commitment to update the information and shall have no responsibility whatsoever for conflicts, incompatibilities, or other difficulties arising from future changes to its documentation, products, specifications and product descriptions. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by or under this document. Except as may be provided in Skyworks Terms and Conditions of Sale for such products, Skyworks assumes no liability whatsoever in association with its documentation, products, specifications and product descriptions. THESE MATERIALS ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED OR OTHERWISE, RELATING TO SALE AND/OR USE OF SKYWORKS PRODUCTS INCLUDING WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, PERFORMANCE, QUALITY OR NON-INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. SKYWORKS FURTHER DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. SKYWORKS SHALL NOT BE LIABLE FOR ANY DAMAGES, INCLUDING SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS THAT MAY RESULT FROM THE USE OF THESE MATERIALS WHETHER OR NOT THE RECIPIENT OF MATERIALS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Skyworks products are not intended for use in medical, lifesaving or life-sustaining applications. Skyworks customers using or selling Skyworks products for use in such applications do so at their own risk and agree to fully indemnify Skyworks for any damages resulting from such improper use or sale. The following are trademarks of Skyworks Solutions, Inc.: Skyworks(R), the Skyworks logo, and Breakthrough Simplicity(R). Product names or services listed in this publication are for identification purposes only, and may be trademarks of Skyworks or other third parties. Third-party brands and names are the property of their respective owners. Additional information, posted at www.skyworksinc.com, is incorporated by reference.
Skyworks Solutions, Inc. * Phone [781] 376-3000 * Fax [781] 376-3100 * sales@skyworksinc.com * www.skyworksinc.com 6
February 17, 2005 * Skyworks Proprietary Information * Products and Product Information are Subject to Change Without Notice. * 200078 Rev. A

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