7-156 reflective spdt gaas mmic switch technical data features ? single-pole, double-throw output ? broad bandwidth: dc to 3 ghz ? low insertion loss: 0.8 db typical at 1 ghz ? fast switching time: 3 ns typical ? ultra low dc power consumption ? small surface-mount plastic package MGS-70008 so-8 package description the MGS-70008 is a single-pole, double-throw monolithic gaas mmic switch. the j2 and j3 of the MGS-70008 are terminated to ground when off (an absorptive version, the mgs-71008, which terminates the off port in an internal 50 w resistor, is also available). the switches are ac equivalent circuit/pinout j1 ground j2 control 1 control 2 j3 ground ground 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 p 1 db and ip 3 . the MGS-70008 is designed for high volume commercial applica- tions 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. the die is fabricated using hps nominal 0.7 m m schottky-barrier- gate, gold metallization, and silicon nitride passivation to achieve excellent performance, uniformity, and reliability. 5965-9116e
7-157 MGS-70008 absolute maximum ratings absolute symbol parameter units maximum [1] maximum input power below 500 mhz dbm +27 above 500 mhz dbm +30 control voltage v -8.0 t stg storage temperature c -65 to 150 note: 1. operation of this device above any one of these limits may cause permanent damage. electrical specifications, t a = 25 c symbol parameters and test conditions [1] units min. typ. max. i c control input current dc m a 12 110 bw bandwidth ghz dc-3 il insertion loss 200 mhz db 0.6 1000 mhz db 0.8 1.1 2000 mhz db 1.0 2500 mhz db 1.1 3000 mhz db 1.2 iso isolation 200 mhz db 51 1000 mhz db 29 33 2000 mhz db 23 2500 mhz db 19 3000 mhz db 16 vswr voltage standing wave ratio (on port) dc - 1000 mhz 1.2:1 1.4:1 j1, j2 or j3 1000- 3000 mhz 1.3:1 vswr voltage standing wave ratio (off port) dc - 2000 mhz 3 10:1 j2 or j3 2000- 3000 mhz 3 10:1 i sw switching speed 10% to 90% ns 3 p 1 db [2] output @ 1 db gain compression 200 mhz dbm 18.5 1000 mhz dbm 26.0 2000 mhz dbm 26.0 ip 3 [2] 3rd order intercept 200 mhz dbm 41 1000 mhz dbm 45 2000 mhz dbm 45 notes: 1. measured in a 50 w system at 1 ghz, unless otherwise specified, v c = -5 v. 2. measured in a 50 w system with v c = -7 v.
7-158 MGS-70008 typical performance, t a = 25 c MGS-70008 truth table (typical performance at 1 ghz) control input insertion loss return loss c1 c2 j1-j2 j1-j3 j1 j2 j3 0 v 0 v 16 db 16 db 1 db 1 db 1 db for normal spdt use 0 v -5 v 33 db .8 db 22 db 1 db 22 db for normal spdt use -5 v 0 v .8 db 33 db 22 db 22 db 1 db -5 v -5 v 19 db 19 db 1 db 1 db 1 db MGS-70008 typical power performance vs. frequency and control voltage (v c ) (all other typical specifications remain constant.) v c = -7 v v c = -5 v v c = -3.3 v frequency p 1 db ip 3 p 1 db ip 3 p 1 db ip 3 200 mhz 18.5 dbm 41 dbm 18.0 dbm 41 dbm 16.5 dbm 35 dbm 1000 mhz 26.0 dbm 45 dbm 23.7 dbm 44 dbm 17.5 dbm 38 dbm 2000 mhz 26.0 dbm 45 dbm 23.0 dbm 44 dbm 16.0 dbm 38 dbm frequency (ghz) 0 -0.5 -1.0 -1.5 -2.0 insertion loss (db) 0123 figure 2. isolation vs. frequency. v control = -5 v. figure 1. insertion loss vs. frequency. v control = -5 v. figure 3. input and output return loss vs. frequency. v control = -7 v. figure 4. output power vs. frequency. v control = -7 v. frequency (ghz) -10 -20 -30 -40 -50 isolation (db) 0123 frequency (ghz) 2:1 1.5:1 1:1 on port vswr 0123 frequency (ghz) 40 30 20 10 0 p 1 db (dbm) 0123
7-159 typical scattering parameters, on switch port, z o = 50 w , t a =25 c, v c = -5 v freq. s 11 s 21 s 12 s 22 mhz mag. ang. db mag. ang. db mag. ang. mag. ang. 0.2 .04 -6.2 -.6 .93 -4.5 -.6 .934 -4.4 .04 -2.5 0.4 .04 0.3 -.6 .93 -8.5 -.6 .934 -8.3 .03 10.6 0.6 .04 7.6 -.6 .93 -12.7 -.6 .930 -12.4 .03 30.7 0.8 .05 13.6 -.6 .93 -16.8 -.7 .927 -16.3 .04 52.8 1.0 .06 14.7 -.6 .93 -21.0 -.7 .927 -20.4 .05 63.0 1.2 .07 14.5 -.6 .93 -25.7 -.6 .931 -24.5 .07 67.1 1.4 .09 14.0 -.6 .93 -30.3 -.6 .930 -28.7 .08 69.1 1.6 .10 10.2 -.6 .93 -34.8 -.6 .930 -32.9 .10 69.2 1.8 .11 8.1 -.6 .93 -39.4 -.6 .928 -37.6 .10 66.6 2.0 .11 1.4 -.6 .93 -44.5 -.6 .928 -41.8 .11 65.2 2.2 .11 -3.2 -.7 .92 -49.9 -.7 .922 -46.8 .09 62.2 2.4 .10 -8.5 -.8 .91 -54.5 -.7 .927 -51.5 .09 60.8 2.6 .08 -13.1 -.7 .92 -58.9 -.7 .920 -56.2 .07 60.0 2.8 .05 -14.1 -.7 .92 -64.0 -.7 .922 -62.4 .04 70.8 3.0 .01 7.4 -.8 .91 -69.0 -1.0 .894 -68.7 .02 127.9 3.2 .04 141.4 -1.1 .88 -75.0 -1.3 .864 -74.4 .05 -178.2 3.4 .11 143.2 -1.2 .87 -79.2 -1.7 .823 -79.9 .10 -169.4 3.6 .17 129.5 -1.4 .85 -81.7 -1.6 .828 -85.7 .12 -178.5 3.8 .22 135.9 -1.3 .86 -85.4 -2.1 .788 -91.8 .19 -168.0 4.0 .32 133.2 1.6 .83 -94.4 -3.0 .708 -95.0 .22 165.6 4.2 .37 129.2 -2.2 .78 -96.8 -3.7 .652 -99.2 .24 166.9 4.4 .46 128.5 -2.0 .79 -96.4 -4.2 .619 -102.5 .30 163.4 typical scattering parameters, off switch port, z o = 50 w , t a =25 c, v c = -5 v freq. s 11 s 21 s 12 s 22 ghz mag. ang. db mag. ang. db mag. ang. mag. ang. 0.2 .05 5.6 -50.0 0 92.1 -44.4 .006 92.4 .81 176.3 0.4 .05 20.6 -40.0 .01 94.2 -38.4 .012 95.2 .82 172.6 0.6 .06 36.0 -35.0 .02 98.1 -35.4 .017 100.3 .83 168.9 0.8 .09 39.3 -31.9 .03 100.9 -32.4 .024 104.4 .83 165.3 1.0 .11 35.8 -30.5 .03 103.9 -30.5 .030 108.5 .85 161.6 1.2 .13 30.9 -28.0 .04 103.6 -28.4 .038 110.4 .86 158.3 1.4 .14 25.0 -28.0 .05 107.5 -26.4 .048 116.2 .87 154.9 1.6 .15 18.9 -24.4 .06 107.0 -24.7 .058 116.8 .89 151.9 1.8 .16 14.5 -23.1 .07 108.5 -23.0 .071 119.6 .90 148.6 2.0 .16 10.6 -21.9 .08 105.9 -21.6 .083 118.0 .92 146.7 2.2 .17 7.8 -20.0 .10 105.3 -19.9 .101 118.6 .92 145.0 2.4 .17 3.0 -19.2 .11 105.4 -18.8 .115 119.8 .95 143.1 2.6 .18 -2.9 -17.7 .13 103.9 -16.9 .143 120.4 .95 141.7 2.8 .16 -9.2 -16.5 .15 102.1 -15.7 .165 119.3 .98 141.2 3.0 .14 -19.6 -14.9 .18 98.5 -13.9 .202 116.4 .99 140.6 3.2 .11 -33.2 -14.0 .20 97.6 -12.2 .246 115.5 1.01 139.6 3.4 .06 -78.5 -12.0 .25 88.8 -10.3 .307 105.1 1.00 139.0 3.6 .08 -156.7 -10.5 .30 79.5 -8.4 .379 89.9 .91 140.4 3.8 .13 -153.0 -11.1 .28 70.0 -10.3 .306 77.4 .94 146.5 4.0 .18 134.3 -11.7 .26 68.9 -8.6 .370 88.3 1.26 142.8 4.2 .22 129.6 -10.8 .29 72.1 -7.8 .407 85.3 1.33 133.7 4.4 .27 128.9 -9.9 .32 72.0 -6.8 .458 83.0 1.45 131.6
7-160 so-8 package dimensions 5.84/6.20 (.230/.244) 3.80/4.00 (.1497/.1574) pin 1 1.27 (.050) 6x 4.72/5.00 (.186/.197) 0.10/0.25 (.004/.0098) 0.33/0.51 (.013/.020) 8x 1.35/1.75 (.0532/.0688) 0.19/0.25 (.0075/.0098) 0.41/1.27 (.016/.050) 0 /8 0.38 0.10 (.015 .004) x 45 0.10 (.004) note: 1. dimensions are shown in millimeters (inches).
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