switches - smt 8 8 - 214 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com hmc348lp3 / 348LP3E gaas mmic spdt non-reflective catv switch, dc - 2.5 ghz v05.0805 general description features functional diagram the hmc348lp3 & hmc348LP3E are non-re ective gaas mesfet spdt switches in low cost leadless qfn surface mount plastic packages ideal for catv applications. covering dc to 2.5 ghz, the switch offers high isolation, low insertion loss, integrated 75 ohm terminations and an all off state. the switch features >80 db isolation at 5 mhz and >55 db isolation up to 1 ghz. the switch operates using complementary positive control voltage logic lines of +5/0v and requires a +5v bias supply (vdd). this switch offers excellent performance in both 50 ohm & 75 ohm systems for either spdt or spst functions. high isolation: >80 db @ 5 mhz (50 ohm) >55 db @ 1 ghz (50 ohm) all off isolation state non-re ective design, 75 ohm terminations 3x3 mm smt package electrical specifications, t a = +25 c, with 0/+5v control, 50 ohm system typical applications the hmc348lp3 / hmc348LP3E is ideal for: ? 75 ohm systems catv signal distribution, cable modem headend & dbs if switching ? 50 ohm systems basestation infrastructure & test equipment parameter frequency min. typ. max. units insertion loss dc - 1000 mhz dc - 2500 mhz 0.6 0.7 0.9 1.0 db db isolation dc - 250 mhz dc - 750 mhz dc - 1000 mhz dc - 2000 mhz dc - 2500 mhz 63 53 50 47 45 68 58 55 52 50 db db db db db return loss on state dc - 2500 mhz 15 20 db return loss rf1, rf2 off state dc - 1000 mhz dc - 2500 mhz 9 8 12 11 db db input power for 1 db compression 50 mhz 1000 mhz 20 25 23 28 dbm dbm input third order intercept (two-tone input power= 0 dbm each tone, 6 mhz tone separation) 50 mhz 1000 mhz 2500 mhz 43 48 51 dbm dbm dbm input second order intercept (two-tone input power= 0 dbm each tone, 6 mhz tone separation) 50 mhz 1000 mhz 2500 mhz 72 89 80 dbm dbm dbm switching characteristics trise, tfall (10/90% rf) ton, toff (50% ctl to 10/90% rf) dc - 2500 mhz 25 600 ns ns
switches - smt 8 8 - 215 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com return loss, 50 ohm system insertion loss, 50 ohm system isolation, 50 ohm system return loss, 75 ohm system insertion loss, 75 ohm system isolation, 75 ohm system hmc348lp3 / 348LP3E gaas mmic spdt non-reflective catv switch, dc - 2.5 ghz v05.0805 -2 -1.5 -1 -0.5 0 0 0.5 1 1.5 2 2.5 +25c +85c -40c insertion loss (db) frequency (ghz) -35 -30 -25 -20 -15 -10 -5 0 0 0.5 1 1.5 2 2.5 rfc rf1, rf2 on rf1, rf2 off return loss (db) frequency (ghz) -80 -70 -60 -50 -40 -30 -20 -10 0 0 0.5 1 1.5 2 2.5 isolation (db) frequency (ghz) -35 -30 -25 -20 -15 -10 -5 0 0 0.5 1 1.5 2 2.5 rfc rf1, rf2 on rf1, rf2 off return loss (db) frequency (ghz) -80 -70 -60 -50 -40 -30 -20 -10 0 0 0.5 1 1.5 2 2.5 rf1 rf2 all off isolation (db) frequency (ghz) -2 -1.5 -1 -0.5 0 0 0.5 1 1.5 2 2.5 insertion loss (db) frequency (ghz)
switches - smt 8 8 - 216 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com truth table control voltages control input signal path state a b rfc to rf1 rfc to rf2 high low on off low high off on low low off off state bias condition low 0 to +0.8v @ 5 ua typical high +2.0 to +5.0 vdc @ 35 ua typical bias voltage & current vdd range = +5.0 vdc 10% vdd (vdc) idd (typ.) (ma) idd (max.) (ma) +5.0 1.1 2.2 input compression point, 50 ohm system absolute maximum ratings bias voltage range (vdd) +7.0 vdc rf input power +30 dbm control voltage range (a & b) +0.5v to vdd + 1.0 vdc channel temperature 150 c continuous pdiss (t = 85 c) (derate 4 mw/c above 85 c) 0.3 w thermal resistance (insertion loss path) 104 c/w thermal resistance (terminated path) 240 c/w storage temperature -65 to +150 c operating temperature -40 to +85 c esd sensitivity (hbm) class 1a electrostatic sensitive device observe handling precautions hmc348lp3 / 348LP3E gaas mmic spdt non-reflective catv switch, dc - 2.5 ghz v05.0805 10 12 14 16 18 20 22 24 26 28 30 32 0 0.5 1 1.5 2 2.5 0.1 db t=+25c 0.1 db t=+85c 0.1 db t= -40c 1 db t=+25c 1 db t=+85c 1 db t= -40c input compression point (dbm) frequency (ghz)
switches - smt 8 8 - 217 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com outline drawing hmc348lp3 / 348LP3E gaas mmic spdt non-reflective catv switch, dc - 2.5 ghz v05.0805 notes: 1. leadframe material: copper alloy 2. dimensions are in inches [millimeters] 3. lead spacing tolerance is non-cumulative. 4. pad burr length shall be 0.15mm maximum. pad burr height shall be 0.05mm maximum. 5. package warp shall not exceed 0.05mm. 6. all ground leads and ground paddle must be soldered to pcb rf ground. 7. refer to hittite application note for suggested land pattern. part number package body material lead finish msl rating package marking [3] hmc348lp3 low stress injection molded plastic sn/pb solder msl1 [1] 348 xxxx hmc348LP3E rohs-compliant low stress injection molded plastic 100% matte sn msl1 [2] 348 xxxx [1] max peak re ow temperature of 235 c [2] max peak re ow temperature of 260 c [3] 4-digit lot number xxxx package information
switches - smt 8 8 - 218 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application circuit the value of capacitors c1 & c2 are critical for low frequency isolation performance below 500 mhz. 3300 pf 0402 size capacitor s are recommended for optimal isolation down to 5 mhz. if the frequency of operation is above 500 mhz then 100 pf to 300 pf 0402 capacitors will be suf cient. pin descriptions pin number function description interface schematic 1 vdd supply voltage +5v 10% 2, 4, 5, 6, 9, 12, 15,16 n/c these pins should be connected to pcb rf ground to maximize isolation. 3, 7, 14 rfc, rf1, rf2 these pins are dc coupled and matched to 75 ohms. blocking capacitors are required. 8, 13 acg1, acg2 external capacitors to ground are required. select value for optimal isolation below 500 mhz. 10 b see truth table and control voltage table. 11 a see truth table and control voltage table. hmc348lp3 / 348LP3E gaas mmic spdt non-reflective catv switch, dc - 2.5 ghz v05.0805
switches - smt 8 8 - 219 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com evaluation pcb (50 ohms) the circuit board used in the nal application should be generated with proper rf circuit design tech- niques. signal lines at the rf port should have 50 ohm impedance and the package ground leads and package bottom should be connected directly to the ground plane similar to that shown above. the eval- uation circuit board shown above is available from hittite microwave corporation upon request. item description j1 - j3 pcb mount sma rf connector j4 - j7 dc pin r1 - r2 100 ohm resistor, 0402 pkg. c1, c2, c4 - c7 3300 pf capacitor, 0402 pkg. c3 4.7 uf tantalum capacitor u1 hmc348lp3 / hmc348LP3E spdt switch pcb [2] 106255 evaluation pcb [1] reference this number when ordering complete evaluation pcb [2] circuit board material: rogers 4350 hmc348lp3 / 348LP3E gaas mmic spdt non-reflective catv switch, dc - 2.5 ghz v05.0805 list of materials for evaluation pcb 106343 [1]
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