Preliminary data sheet AS179-000: GaAs SPDT Switch 300 kHz–3 GHz Medium Power Applications Functional Block Diagram General-purpose medium-power switch in telecommunication applications l Transceiver transmit-receive switch in 802.11b/g WLAN, etc., systems l RF1 J2 RF2 CBL V1 J1 Ground Features roadband: 300 kHz–3 GHz B Low insertion loss: 0.3 dB @ 900 MHz l High isolation: 25 dB @ 900 MHz l P 1 dB: 30 dBm @ 3 V control voltage l IP3: 43 dBm @ 3 V control voltage l Low DC power consumption l 100% RF tested in die form l Lead (Pb)-free, RoHS-compliant, and Green™ l ESD Class 1A CBL J3 V2 Control Voltage 1 CBL RF Common Control Voltage 2 l l 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 µA nominal with control voltage of 3 V. The switch can operate over the temperature range of -40° C to +85° C. NEW DC blocks required on all RF ports for positive control voltage operation. Absolute Maximum Ratings Characteristic RF input power (VCTL 0 V/7 V) Control voltage range Value 6 W, f > 500 MHz 2 W, 100 > f > 500 MHz 315 mW, f = 300 kHz(1) -0.2 V £ VC £ +8 V Operating temperature range -40 °C to +85 °C Storage temperature range -40 °C to +150 °C 1. Derate linearly for 300 kHz < f < 100 MHz. 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: A lthough this device is designed to be as robust as possible, ESD (Electrostatic Discharge) 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. Skyworks Green™ products are RoHS (Restriction of Hazardous Substances)-compliant, conform to the EIA/EICTA/JEITA Joint Industry Guide (JIG) Level A guidelines, are halogen free according to IEC-61249-2-21, and contain <1,000 ppm antimony trioxide in polymeric materials. Preliminary Data Sheet: Based on engineering results. Sampling quantities available. Pin out and package have been determined. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 200078 Rev. E • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • December 18, 2008 1 Preliminary Data Sheet • AS179-000 Electrical Specifications at 25 °C VCTL = 0 V/3 V, T = 25 °C, PINPUT = 0 dBm, ZO = 50 W, unless otherwise noted Parameter FrequencyMin.Typ.Max. loss Insertion 300 kHz–1 GHz 1–2 GHz 2–3 GHz Isolation 300 kHz–1 GHz 1–2 GHz 2–3 GHz VSWR(1) 300 kHz–3 GHz 22 20 20 0.30 0.30 0.35 0.4 0.4 0.5 25 22 22 1.1:1 Unit dB dB dB dB dB dB 1.3:1 1. Insertion loss state. Operating Characteristics at 25 °C VCTL = 0 V/3 V, T = 25 °C, PINPUT = 0 dBm, ZO = 50 W, unless otherwise noted Parameter Switching characteristics Rise, fall On, off Video feedthru Condition Frequency Min. 10/90% or 90/10% RF 50% CTL to 90/10% RF TRISE = 1 ns, BW = 500 MHz Max. Unit 10 20 25 ns ns mV Input power for 1 dB compression (IP1 dB) VCTL = 0/3 V VCTL = 0/5 V 0.5–3 GHz 0.5–3 GHz 30 34 dBm dBm Input Intermodulation intercept point (IIP3) For two-tone input power 5 dBm VCTL = 0/3 V VCTL = 0/5 V 0.5–3 GHz 0.5–3 GHz 43 50 dBm dBm 15 °C/W Thermal resistance 2 Typ. Control voltage VHIGH VLOW Control port current VCTL = 5 V VCTL = 0 V 3 0 5 0.2 V V 100 20 µA µA Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com December 18, 2008 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • 200078 Rev. E Preliminary Data Sheet • AS179-000 Typical Performance Data -10 0 -15 -20 -0.2 Isolation (dB) -0.3 J1–J3 -0.4 -35 -40 -45 -55 1.0 1.5 2.0 2.5 3.0 3.5 4.0 -60 0 1.0 1.5 2.0 2.5 3.0 3.5 insertion loss vs. Frequency isolation vs. Frequency 0.0244 (0.62 mm) ILJ2 ILJ3 ILJ2 1.0 1.5 2.0 2.5 3.0 Frequency (GHz) VsWr vs. Frequency 3.5 4.0 J1 0.0098 (0.25 mm) 0.000 0.0024 (0.06 mm) 0.000 J3 GND V2 0.0159 (0.40 mm) 1.0 0.5 V1 GND J2 0.0209 (0.53 mm) 1.1 ILJ3 0.0126 (0.32 mm) 1.2 VSWR Die Outline 4.0 0.0220 (0.56 mm) Frequency (GHz) 1.3 0 0.5 Frequency (GHz) 0.0183 (0.47 mm) 0.5 0.0149 (0.38 mm) 0 0.0121 (0.31 mm) -0.6 J3 -30 -50 J1–J2 -0.5 J2 -25 0.0024 (0.06 mm) Insertion Loss (dB) -0.1 Bond-pad dimensions: 0.0022 (0.06 mm) square. Bond-pad metallization: Gold. Backside metallization: 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 • [email protected] • www.skyworksinc.com 200078 Rev. E • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • December 18, 2008 3 Preliminary Data Sheet • AS179-000 Port Descriptions ParameterDescription J1 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. J2, J3 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. V1, V2 ontrol Voltage Inputs — Combination of voltage logic levels applied to these pins determines the state of the RF paths C between J1 and J2/J3. GND Ground — Should be down-bonded to circuit ground Truth Table VCTL1 VHIGH 0 0 VHIGH Simplified Block Diagram VCTL2 J1–J2 J1–J3 0 Isolation Insertion loss VHIGH Insertion loss Isolation 0 Not allowed Not allowed VHIGH Not allowed Not allowed 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 highisolation 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. RF Common (J1) Q2 RF1 (J2) Q3 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 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. 4 RF2 (J3) 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 • [email protected] • www.skyworksinc.com December 18, 2008 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • 200078 Rev. E Preliminary Data Sheet • AS179-000 Copyright © 2002, 2003, 2004, 2005, 2006, 2007, 2008, Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained herein, 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 or the information contained herein. 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Skyworks assumes no liability for applications assistance, customer product design, or damage to any equipment resulting from the use of Skyworks products outside of stated published specifications or parameters. Skyworks, the Skyworks symbol, and “Breakthrough Simplicity” are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands and names are for identification purposes only, and are the property of their respective owners. Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference. Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 200078 Rev. E • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • December 18, 2008 5