attenuators - smt 5 5 - 138 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 hmc468lp3 / 468LP3E 1 db lsb gaas mmic 3-bit digital positive control attenuator, dc - 6 ghz v03.1107 functional diagram electrical speci cations, t a = +25 c, with vdd = +5v & vctl = 0/+5v the hmc468lp3 / hmc468LP3E is ideal for: ? cellular; umts/3g infrastructure ? fixed wireless & wll ? microwave radio & vsat ? test equipment 1 db lsb steps to 7 db high ip3: +50 dbm 0.25 db typical bit error single control line per bit single +5v supply 16 lead 3x3mm smt package: 9mm 2 included in the hmc-dk004 designers kit the hmc468lp3 & hmc468LP3E are broadband 3-bit gaas ic digital attenuators in low cost leadless surface mount packages. covering dc to 6.0 ghz, the insertion loss is less than 1 db typical up to 4 ghz. the attenuator bit values are 1 (lsb), 2 and 4 db for a total attenuation of 7 db. attenuation accu- racy is excellent at 0.4 db typical step error with an iip3 of +50 dbm. three control voltage inputs, toggled between 0 and +5v, are used to select each attenua- tion state. a single vdd bias of +5v is required. parameter frequency (ghz) min. typ. max. units insertion loss dc - 2.5 ghz 2.5 - 4.5 ghz 4.5 - 6.0 ghz 0.7 0.9 1.3 1.0 1.3 1.8 db db db attenuation range dc - 6 ghz 7 db return loss (rf1 & rf2, all atten. states) dc - 4 ghz 4.0 - 6.0 ghz 20 15 db db attenuation accuracy: (referenced to insertion loss) all states 1 - 4 db states 5 - 7 db states dc - 2.5 ghz 2.5 - 6.0 ghz 2.5 - 6.0 ghz 0.2 + 2% of atten. setting max. 0.3 + 3% of atten. setting max. 0.4 + 4% of atten. setting max. db db db input power for 0.1 db compression 0.25 - 6.0 ghz 20 dbm input third order intercept point (two-tone input power= 0 dbm each tone) 0.25 - 6.0 ghz 50 dbm switching characteristics trise, tfall (10/90% rf) ton, toff (50% ctl to 10/90% rf) dc - 6 ghz 110 135 ns ns * bypass capacitor connecting acg1, acg2 & acg3 to rf ground required per pin description herein. typical applications features general description
attenuators - smt 5 5 - 139 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 rf1, rf2 (only major states are shown) insertion loss normalized attenuation (only major states are shown) bit error vs. frequency (only major states are shown) relative phase vs. frequency (only major states are shown) bit error vs. attenuation state -3 -2.5 -2 -1.5 -1 -0.5 0 0123456 +25 c +85 c -40 c insertion loss (db) frequency (ghz) -35 -30 -25 -20 -15 -10 -5 0 0123456 il 1 db 2 db 4 db 7 db return loss (db) frequency (ghz) -10 -8 -6 -4 -2 0 0123456 1 db 2 db 4 db 7 db normalized attenuation (db) frequency (ghz) -1 -0.6 -0.2 0.2 0.6 1 1234567 80 mhz 500 mhz 1 ghz 2 ghz 3 ghz 4 ghz 5 ghz 6 ghz bit error (db) attenuation state (db) -1 -0.6 -0.2 0.2 0.6 1 0123456 1 db 2 db 4 db 7 db bit error (db) frequency (ghz) -10 -5 0 5 10 15 20 0123456 1 db 2 db 4 db 7 db relative phase (deg) frequency (ghz) hmc468lp3 / 468LP3E v03.1107 1 db lsb gaas mmic 3-bit digital positive control attenuator, dc - 6 ghz
attenuators - smt 5 5 - 140 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 ttl/cmos control voltages state bias condition low 0 to 0.8 vdc @ -5 ua typ. high +2.0 to +5.0 vdc @ 40 ua typ. control voltage input attenuation setting rf1 - rf2 v1 4 db v2 2 db v3 1 db high high high reference i.l. high high low 1 db high low high 2 db low high high 4 db low low low 7 db any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected. worst case step error between successive attenuation states -1 -0.6 -0.2 0.2 0.6 1 0123456 step error (db) frequency (ghz) bias voltage & current vdd range= +5.0 vdc 10% vdd (vdc) idd (typ.) (ma) idd (max.) (ma) +5.0 1.05 1.8 hmc468lp3 / 468LP3E v03.1107 1 db lsb gaas mmic 3-bit digital positive control attenuator, dc - 6 ghz
attenuators - smt 5 5 - 141 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 absolute maximum ratings outline drawing control voltage (v1 to v3) -0.5 vdc to vdd +1 vdc bias voltage (vdd) +7 vdc storage temperature -65 to +150 c operating temperature -40 to +85 c rf input power +30 dbm esd sensitivity (hbm) class 1a electrostatic sensitive device observe handling precautions part number package body material lead finish msl rating package marking [3] hmc468lp3 low stress injection molded plastic sn/pb solder msl1 [1] 468 xxxx hmc468LP3E rohs-compliant low stress injection molded plastic 100% matte sn msl1 [2] 468 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. hmc468lp3 / 468LP3E v03.1107 1 db lsb gaas mmic 3-bit digital positive control attenuator, dc - 6 ghz
attenuators - smt 5 5 - 142 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, 4, 8, 9, 10, 12 n/c these pins should be connected to pcb rf ground to maximize performance. 2, 11 rf1, rf2 this pin is dc coupled and matched to 50 ohm. blocking capacitors are required 13 - 15 v1 - v3 see truth table and control voltage table. 5 - 7 acg1 - acg3 external capacitor to ground is required. select value for lowest frequency of operation. place capacitor as close to pins as possible. 16 vdd supply voltage gnd package bottom has an exposed metal paddle that must be connected to rf/dc ground. application circuit hmc468lp3 / 468LP3E v03.1107 1 db lsb gaas mmic 3-bit digital positive control attenuator, dc - 6 ghz
attenuators - smt 5 5 - 143 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 use rf circuit design techniques. signal lines should have 50 ohm impedance while the package ground leads and exposed paddle should be con- nected directly to the ground plane similar to that shown. a sufficient number of via holes should be used to connect the top and bottom ground planes. the evaluation circuit board shown is available from hittite upon request. list of materials for evaluation pcb 107302 [1] item description j1 - j2 pcb mount sma connector j3 - j7 dc pin c1 1000 pf capacitor, 0603 pkg. c2, c3 100 pf capacitor, 0402 pkg. c4 3300 pf capacitor, 0603 pkg. u1 hmc468lp3 / hmc468LP3E digital attenuator pcb [2] 107300 evaluation pcb [1] reference this number when ordering complete evaluation pcb [2] circuit board material: rogers 4350 hmc468lp3 / 468LP3E v03.1107 1 db lsb gaas mmic 3-bit digital positive control attenuator, dc - 6 ghz
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