attenuators - smt 6 6 - 96 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 gaas mmic voltage-variable attenuator, dc - 14 ghz general description features functional diagram wide bandwidth: dc - 14 ghz low phase shift vs. attenuation 30 db attenuation range simpli ed voltage control 3 mm x 3 mm x 1 mm smt package electrical specifications, t a = +25 c, 50 ohm system typical applications the hmc346lp3 / hmc346LP3E is ideal for: ? basestation infrastructure ? fiber optics & broadband telecom ? microwave radio & vsat ? military radios, radar, & ecm ? test instrumentation the hmc346lp3 & hmc346LP3E are pabsorp- tive voltage variable attenuators (vva) in low cost leadless surface mount plastic packages operating from dc - 14 ghz. it features an on-chip reference attenuator for use with an external op-amp to provide simple single voltage attenuation control, 0 to -3v. the device is ideal in designs where an analog dc control signal must control rf signal levels over a 30 db amplitude range. this vva is an excellent alterna- tive to the hmc121c8. parameter min typical max units insertion loss dc - 10 ghz dc - 14 ghz 1.7 2.8 2.2 3.3 db db attenuation range dc - 10 ghz dc - 14 ghz 27 22 30 27 db db return loss dc - 14 ghz 5 10 db switching characteristics trise, tfall (10/90% rf): ton, toff (50% ctl to 10/90% rf): 2 8 ns ns input power for 0.25 db compression (0.5 - 8 ghz) min. atten: atten. >2 db: +8 -4 dbm dbm input third order intercept (0.5 - 8 ghz) (two-tone input power = -8 dbm each tone) min. atten: atten. >2 db: +25 +10 dbm dbm hmc346lp3 / 346LP3E v03.0705
attenuators - smt 6 6 - 97 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 relative attenuation relative attenuation vs. control voltage @ 10 ghz insertion loss vs. temperature return loss vs. attenuation relative phase input ip3 vs. attenuation* *two-tone input power = -8 dbm each tone, 1 mhz spacing. gaas mmic voltage-variable attenuator, dc - 14 ghz hmc346lp3 / 346LP3E v03.0705 -35 -30 -25 -20 -15 -10 -5 0 0246810121416 min 5 db max return loss (db) frequency (ghz) -3 -2.5 -2 -1.5 -1 -0.5 0 0 5 10 15 20 25 30 v1 v2 control voltage (vdc) relative attenuation (db) 0 5 10 15 20 25 30 0246810121416 0 db 3 db 6 db 10 db input ip3 (dbm) frequency (ghz) 0 20 40 60 80 100 120 140 160 180 0246810121416 5 db 10 db 15 db 20 db 25 db 30 db max relative phase (deg) frequency (ghz) -40 -35 -30 -25 -20 -15 -10 -5 0 0246810121416 attenuation (db) frequency (ghz) -4 -3.5 -3 -2.5 -2 -1.5 -1 -0.5 0 0246810121416 +25 c -40 c +85 c insertion loss (db) frequency (ghz)
attenuators - smt 6 6 - 98 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 *two-tone input power = -8 dbm each tone, 1 mhz spacing. 0.25 db compression vs. attenuation 1 db compression vs. attenuation input ip2 vs. attenuation* second harmonic vs. attenuation, pin = -8 dbm gaas mmic voltage-variable attenuator, dc - 14 ghz hmc346lp3 / 346LP3E v03.0705 10 20 30 40 50 60 70 0246810121416 0 db 3 db 6 db 10 db input ip2 (dbm) frequency (ghz) -5 0 5 10 15 20 0246810121416 0 db (ref) 6 db input p1db (dbm) frequency (ghz) -10 -5 0 5 10 15 0246810121416 0 db (ref) 6 db input .25db (dbm) frequency (ghz) 20 30 40 50 60 70 80 0246810121416 0 db 3 db 6 db 10 db second harmonic (dbc) frequency (ghz)
attenuators - smt 6 6 - 99 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 absolute maximum ratings rf input power +18 dbm control voltage range +1.0 to -5.0 vdc storage temperature -65 to +150 c operating temperature -40 to +85 c electrostatic sensitive device observe handling precautions part number package body material lead finish msl rating package marking [3] hmc346lp3 low stress injection molded plastic sn/pb solder msl1 [1] 346 xxxx hmc346LP3E rohs-compliant low stress injection molded plastic 100% matte sn msl1 [2] 346 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 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. gaas mmic voltage-variable attenuator, dc - 14 ghz hmc346lp3 / 346LP3E v03.0705
attenuators - smt 6 6 - 100 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 pin descriptions pin number function description interface schematic 1, 3, 7, 10, 12 gnd package bottom has exposed metal paddle that must also be connected to pcb rf ground. 2, 11 rf1 rf2 this pin is dc coupled and matched to 50 ohm. blocking capacitors are required if the rf line potential is not equal to 0v. 4, 9, 13, 14, 15, 16 n/c this pin should be connected to pcb rf ground. 5, 8 v2, v1 control input (master). 6 i control input (slave). external op-amp control circuit maintains impedance match while attenuation is varied. input control ranges from 0 volts (min. attenuation) to -3.0 volts (max. attenuation.) single-line control driver gaas mmic voltage-variable attenuator, dc - 14 ghz hmc346lp3 / 346LP3E v03.0705
attenuators - smt 6 6 - 101 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 the circuit board used in the nal application should be generated with proper rf circuit design techniques. signal lines at the rf ports should be 50 ohm impedance and the package ground leads and package bottom should be connected directly to the pcb rf ground plane, similar to that shown above. the evaluation circuit board shown above is available from hittite microwave corporation upon request. item description j1 - j2 pcb mount sma rf connector j3 - j6 dc pin u1 hmc346lp3 / hmc346LP3E vva pcb [2] 105695 evaluation pcb [1] reference this number when ordering complete evaluation pcb [2] circuit board material: rogers 4350 list of materials for evaluation pcb 105709 [1] gaas mmic voltage-variable attenuator, dc - 14 ghz hmc346lp3 / 346LP3E v03.0705
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