9 attenuators - smt 9 - 90 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 HMC346LC3B gaas mmic voltage-variable attenuator, dc - 18 ghz v00.1204 general description features functional diagram wide bandwidth: dc - 18 ghz low phase shift vs. attenuation 30 db attenuation range simplifi ed voltage control rohs compliant 3 x 3 mm smt package electrical specifications, t a = +25 c, 50 ohm system typical applications the HMC346LC3B is ideal for: ? test instrumentation ? fiber optics & broadband telecom ? microwave radio & vsat ? military radios, radar, & ecm the HMC346LC3B is an absorptive voltage variable attenuator (vva) in a leadless pb free rohs compli- ant smt mount plastic package operating from dc - 18 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. the HMC346LC3B allows the use of surface mount manufacturing techniques. parameter min typical max units insertion loss dc - 10 ghz dc - 14 ghz dc - 18 ghz 1.5 2.2 2.8 2.0 2.7 3.5 db db db attenuation range dc - 12 ghz dc - 18 ghz 26 22 30 26 db db return loss dc - 18 ghz 10 db input power for 0.25 db compression (0.5 - 18 ghz) min. atten: atten. >2 db: +8 -4 dbm dbm input third order intercept (0.5 - 18 ghz) (two-tone input power = -8 dbm each tone) min. atten: atten. >2 db: +25 +10 dbm dbm switching characteristics trise, tfall (10/90% rf): ton, toff (50% ctl to 10/90% rf): 2 8 ns ns
9 attenuators - smt 9 - 91 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 -4 -3.5 -3 -2.5 -2 -1.5 -1 -0.5 0 024681012141618 +25c +85c -40c insertion loss (db) frequency (ghz) -40 -35 -30 -25 -20 -15 -10 -5 0 024681012141618 attenuation (db) frequency (ghz) -35 -30 -25 -20 -15 -10 -5 0 024681012141618 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 20 40 60 80 100 120 140 160 180 024681012141618 5 db 10db 15db 20db 25db 30db max relative phase (deg) frequency (ghz) 0 5 10 15 20 25 30 024681012141618 0 db 3 db 6 db 10 db input ip3 (dbm) frequency (ghz) relative attenuation relative attenuation vs. control voltage @ 10 ghz insertion loss vs. temperature return loss vs. attenuation relative phase vs. attenuation input ip3 vs. attenuation* *two-tone input power = -8 dbm each tone, 1 mhz spacing. HMC346LC3B gaas mmic voltage-variable attenuator, dc - 18 ghz v00.1204
9 attenuators - smt 9 - 92 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 10 20 30 40 50 60 70 024681012141618 0 db 3 db 6 db 10 db input ip2 (dbm) frequency (ghz) -10 -5 0 5 10 15 024681012141618 0 db (ref) 6 db input .25db (dbm) frequency (ghz) -5 0 5 10 15 20 024681012141618 0 db (ref) 6 db input p1db (dbm) frequency (ghz) 20 30 40 50 60 70 80 024681012141618 0 db 3 db 6 db 10 db second harmonic (dbc) frequency (ghz) input ip2 vs. attenuation* second harmonic vs. attenuation, pin = -8 dbm HMC346LC3B gaas mmic voltage-variable attenuator, dc - 18 ghz v00.1204
9 attenuators - smt 9 - 93 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 notes: 1. package body material: alumina 2. lead and ground paddle plating: gold flash over ni 3. dimensions are in inches [millimeters] 4. lead spacing tolerance is non-cumulative 5. package warp shall not exceed 0.05mm 6. all ground leads and ground paddle must be soldered to pcb rf ground electrostatic sensitive device observe handling precautions 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 HMC346LC3B gaas mmic voltage-variable attenuator, dc - 18 ghz v00.1204
9 attenuators - smt 9 - 94 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, 9 gnd package bottom has exposed metal paddle that must also be connected to pcb rf ground. 2, 8 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, 6 v2, v1 control input (master). 5 i control input (slave). 10, 11, 12 n/c this pin may be connected to pcb rf/dc ground. performance will not be affected. 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 HMC346LC3B gaas mmic voltage-variable attenuator, dc - 18 ghz v00.1204
9 attenuators - smt 9 - 95 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 fi 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 - j7 dc pin u1 HMC346LC3B vva pcb [2] 109739-1 evaluation pcb [1] reference this number when ordering complete evaluation pcb [2] circuit board material: rogers 4350 list of material for evaluation pcb 109741 [1] HMC346LC3B gaas mmic voltage-variable attenuator, dc - 18 ghz v00.1204
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