Absorptive SPDT GaAs MMIC Switch Technical Data MGS-71008 Features • Single-Pole, Double-Throw Output • Broad Bandwidth: DC to 3␣ GHz • High Isolation: 37␣ dB␣ Typical at 1␣ GHz • Fast Switching Time: 3␣ ns␣ Typical • Ultra Low DC Power Consumption • Small Surface-Mount Plastic Package Description The MGS-71008 is a single-pole, double-throw monolithic GaAs MMIC switch. The J2 and J3 of the MGS-71008 are terminated to ground by internal 50 Ω load resistors when “off” (a reflective version, the MGS-70008, which terminates the “off” port to ground, is also available). The switch is sealed in a small, plastic, surface-mount SO-8 package. Switching is actuated by a -5 V control voltage per the truth table shown on the next page. -3.3␣ V operation is also possible with some reduction in P1 dB and IP3. The MGS-71008 is designed for high volume commercial applications where low insertion loss, high isolation, and fast switching speed are required. Its low cost and high performance make it suitable for a wide variety of uses such as digital cellular, spread spectrum, GPS, and other RF switching applications. Refer to applications note AN-G007 for more application details. SO-8 Package AC Equivalent Circuit/Pinout J1 Ground Ground Ground J2 Control 1 J3 Control 2 The die is fabricated using HP’s nominal 0.3␣ micron recessed Schottky-barrier-gate, gold metallization, and silicon nitride passivation to achieve excellent performance, uniformity, and reliability. 7-161 5965-9118E MGS-71008 Absolute Maximum Ratings Symbol TSTG Parameter Maximum Input Power below 500 MHz above 500 MHz Control Voltage Storage Temperature Units Absolute Maximum[1] dBm dBm V °C +27 +30 -8.0 -65 to 150 Note: 1. Operation of this device above any one of these limits may cause permanent damage. Electrical Specifications, TA = 25°C Parameters and Test Conditions[1] Symbol IC Control Input Current BW Bandwidth IL Insertion Loss ISO DC Units µA GHz Isolation Min. 200 MHz 1000 MHz 2000 MHz 2500 MHz 3000 MHz dB dB dB dB dB 200 MHz 1000 MHz 2000 MHz 2500 MHz 3000 MHz dB dB dB dB dB Typ. Max. 12 DC-3 0.9 1.2 1.3 1.4 1.5 30 Voltage Standing Wave Ration (on port) DC -1000 MHz 1000-3000 MHz — — 1.2:1 1.3:1 VSWR J2 or J3 Voltage Standing Wave Ration (off port) DC -2000 MHz 2000-3000 MHz — — 1.2:1 1.3:1 ISW Switching Speed 10% to 90% ns 3 P1 dB[2] Output @ 1 dB Gain Compression 200 MHz 1000 MHz 2000 MHz dBm dBm dBm 16.5 25.2 25.2 IP3[2] 3rd Order Intercept 200 MHz 1000 MHz 2000 MHz dBm dBm dBm 41 45 45 7-162 1.5 52 37 26 22 16 VSWR J1, J2 or J3 Notes: 1. Measured in a 50 Ω system at 1 GHz, unless otherwise specified, V C = -5 V. 2. Measured in a 50 Ω system with VC = -7 V. 110 1.4:1 MGS-70008 Typical Performance, TA = 25°C 2:1 -10 -20 -1.0 -1.5 -2.0 ISOLATION (dB) -0.5 OFF PORT VSWR INSERTION LOSS (dB) 0 1.5:1 -40 1:1 0 1 2 -30 3 0 1 2 3 FREQUENCY (GHz) FREQUENCY (GHz) Figure 1. Insertion Loss vs. Frequency. VControl = -5 V. Figure 2. Off Port VSWR vs. Frequency. VControl = -5 V. 2:1 -50 0 1 2 3 FREQUENCY (GHz) Figure 3. Isolation vs. Frequency. VControl = -5 V. 40 P1 dB (dBm) ON PORT VSWR 30 1.5:1 20 10 1:1 0 1 2 0 3 0 FREQUENCY (GHz) 1 2 3 FREQUENCY (GHz) Figure 4. On Port VSWR vs. Frequency. VControl = -5 V. Figure 5. Output Power vs. Frequency. VControl = -7 V. MGS-71008 Truth Table (Typical Performance at 1 GHz) Control Input C1 C2 0V 0V 0V -5 V -5 V 0V -5 V -5 V For normal SPDT use For normal SPDT use Insertion Loss J1-J2 J1-J3 16 dB 16 dB 37 dB 1.2 dB 1.2 dB 37 dB 26 dB 26 dB Return Loss J1 J2 J3 1 dB 1 dB 1 dB 22 dB 22 dB 22 dB 22 dB 22 dB 1 dB 1 dB 1 dB 1 dB MGS-71008 Typical Power Performance vs. Frequency and Control Voltage (VC) (All other typical specifications remain constant.) VC = -7 V Frequency 200 MHz 1000 MHz 2000 MHz P1 dB 16.5 dBm 25.2 dBm 25.2 dBm IP3 41 dBm 45 dBm 45 dBm VC = -5 V P1 dB 16.5 dBm 23.7 dBm 22.5 dBm 7-163 IP3 41 dBm 44 dBm 44 dBm VC = -3.3 V P1 dB IP3 15.5 dBm 35 dBm 19.0 dBm 38 dBm 18.5 dBm 38 dBm Typical Scattering Parameters, ON Switch Port, ZO = 50 Ω, TA = 25°C, VC = -5 V Freq. MHz 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4 Mag. .05 .05 .05 .05 .05 .06 .06 .07 .06 .06 .06 .07 .08 .11 .14 .20 .26 .31 .40 .51 .63 .82 S11 Ang. -18.2 -18.3 -20.6 -18.7 -20.4 -26.3 -29.1 -38.1 -46.4 -63.8 -82.3 -109.8 -128.7 -153.4 -169.6 178.3 167.7 154.5 152.0 145.4 139.5 133.0 dB -.9 -.9 -.9 -.9 -1.0 -1.0 -1.0 -1.1 -1.1 -1.2 -1.2 -1.3 -1.4 -1.5 -1.6 -2.0 -2.3 -2.4 -2.5 -3.0 -3.3 -3.1 S21 Mag. .90 .90 .90 .90 .89 .89 .89 .88 .88 .87 .87 .86 .85 .84 .83 .79 .77 .76 .75 .71 .68 .70 Ang. -5.1 -9.4 -13.9 -18.2 -22.8 -27.8 -32.7 -37.5 -42.4 -47.8 -53.5 -58.5 -63.2 -68.7 -74.0 -80.3 -83.8 -87.3 -90.3 -100.2 -101.6 -103.8 dB -.9 -.9 -.9 -.9 -1.0 -1.0 -1.0 -1.0 -1.1 -1.1 -1.2 -1.2 -1.4 -1.5 -2.0 -2.5 -3.1 -3.3 -4.0 -4.6 -5.4 -6.1 S12 Mag. .904 .9.6 .898 .898 .890 .893 .891 .889 .884 .879 .871 .867 .851 .838 .791 .746 .700 .686 .632 .588 .534 .498 S22 Ang. -5.0 -9.2 -13.6 -17.8 -22.3 -26.9 -31.5 -36.3 -41.5 -46.6 -52.2 -57.8 -62.9 -70.0 -76.5 -82.8 -87.2 -93.8 -99.3 -99.6 -101.6 -104.6 Mag. .05 .04 .03 .02 .02 .01 .02 .02 .01 .01 .03 .05 .08 .11 .16 .20 .26 .29 .37 .37 .43 .46 Ang. -14.1 -10.1 -8.2 8.9 30.5 42.3 55.2 59.1 19.1 -75.6 -103.5 -115.3 -126.2 -134.4 -144.1 -152.8 -163.4 -168.1 -169.7 167.2 168.5 162.7 Typical Scattering Parameters, OFF Switch Port, ZO = 50 Ω, TA = 25°C, VC = -5 V Freq. GHz 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4 Mag. .06 .05 .05 .06 .06 .07 .08 .08 .08 .07 .08 .07 .06 .05 .05 .08 .16 .23 .34 .45 .54 .65 S11 Ang. -9.8 0 27.3 20.7 21.7 20.6 15.7 -5.6 -11.8 -17.0 -24.6 -40.0 -46.7 -66.2 -112.4 -158.0 170.2 158.7 146.0 138.0 129.9 125.4 dB -52.0 -42.4 -36.4 -35.2 -33.7 -31.4 -30.5 -28.0 -26.0 -24.4 -21.9 -20.9 -20.0 -18.4 -16.5 -15.4 -14.4 -13.6 -12.4 -11.4 -12.0 -10.8 S21 Mag. 0 .01 .02 .02 .02 .03 .03 .04 .05 .06 .08 .09 .10 .12 .15 .17 .19 .21 .24 .27 .25 .29 Ang. 73.6 94.8 113.0 92.3 106.1 114.5 122.9 112.0 122.0 121.9 124.3 119.5 119.4 119.0 116.5 111.0 100.7 100.8 97.3 83.0 82.7 81.1 7-164 dB -46.0 -41.9 -36.5 -35.4 -33.6 -32.0 -29.1 -27.7 -26.2 -24.2 -22.3 -20.4 -19.6 -17.8 -16.1 -14.4 -13.8 -13.0 -12.8 -11.7 -12.6 -11.9 S12 Mag. .005 .008 .015 .017 .021 .025 .035 .041 .049 .062 .077 .095 .105 .129 .157 .191 .204 .223 .229 .260 .234 .253 S22 Ang. 74.7 95.5 113.7 93.0 107.1 116.4 125.5 114.2 124.9 125.4 128.3 123.5 124.0 122.9 119.7 113.1 100.3 96.7 90.9 78.3 78.8 74.5 Mag. .01 .03 .05 .07 .08 .10 .12 .14 .16 .18 .21 .23 .25 .27 .30 .32 .33 .35 .36 .33 .39 .39 Ang. 146.5 130.7 125.1 116.9 115.7 114.8 114.6 116.3 115.2 117.1 118.5 117.9 117.8 117.9 118.0 116.2 119.8 120.5 124.0 113.0 120.7 116.1 SO-8 Package Dimensions 1.27 (.050) 6x 3.80/4.00 (.1497/.1574) 5.84/6.20 (.230/.244) 0.38 ± 0.10 (.015 ± .004) x 45° Pin 1 1.35/1.75 (.0532/.0688) 4.72/5.00 (.186/.197) 0°/8° 0.10 (.004) 0.33/0.51 (.013/.020) 8X 0.19/0.25 (.0075/.0098) 0.10/0.25 (.004/.0098) Note: 1. Dimensions are shown in millimeters (inches). 0.41/1.27 (.016/.050) 7-165