attenuators - smt 5 5 - 144 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 hmc470lp3 / 470lp3e 1 db lsb gaas mmic 5-bit digital positive control attenuator, dc - 3 ghz v04.1108 functional diagram electrical speci cations, t a = +25 c, with vdd = +5v & vctl = 0/+5v (unless otherwise noted) the hmc470lp3(e) is ideal for: ? cellular; umts/3g infrastructure ? ism, mmds, wlan, wimax ? microwave radio & vsat ? test equipment and sensors 1 db lsb steps to 31 db single control line per bit ttl/cmos compatible control 0.3 db typical step error single +5v supply 16 lead 3x3mm smt package: 9mm2 included in the hmc-dk004 designers kit the hmc470lp3(e) is a broadband 5-bit gaas ic digital attenuators in low cost leadless surface mo- unt packages. this single positive control line per bit digital attenuator incorporates off chip ac ground capacitors for near dc operation, making it suitable for a wide variety of rf and if applications. covering dc to 3 ghz, the insertion loss is less than 1.5 db typical. the attenuator bit values are 1 (lsb), 2, 4, 8, and 16 db for a total attenuation of 31 db. attenuation accuracy is excellent at 0.3 db typical step error with an iip3 of +45 dbm. five ttl/cmos control inputs are used to select each attenuation state. a single vdd bias of +5v is required. parameter frequency (ghz) min. typ. max. units insertion loss dc - 1.5 ghz 1.5 - 2.3 ghz 2.3 - 3.0 ghz 1.3 1.4 1.7 1.6 1.7 2.0 db db db attenuation range dc - 3 ghz 31 db return loss (rf1 & rf2, all atten. states) dc - 3 ghz 17 db attenuation accuracy: (referenced to insertion loss) all attenuation states 1.0 - 15.0 db states 16.0 - 31.0 db states dc - 2.3 ghz 2.3 - 3.0 ghz 2.3 - 3.0 ghz (0.3 + 2% of atten. setting) max. (0.3 + 3% of atten. setting) max. (0.3 + 6% of atten. setting) max. db db db input power for 0.1 db compression 0.1 - 3.0 ghz 20 dbm input third order intercept point (two-tone input power= 0 dbm each tone) ref - 15 db states 16 - 31 db states 0.1 - 3.0 ghz 45 35 dbm dbm switching characteristics trise, tfall (10/90% rf) ton, toff (50% ctl to 10/90% rf) dc - 3 ghz 160 180 ns ns typical applications features general description
attenuators - smt 5 5 - 145 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 0 0.5 1 1.5 2 2.5 3 3.5 4 +25 c +85 c -40 c insertion loss (db) frequency (ghz) -35 -30 -25 -20 -15 -10 -5 0 0 0.5 1 1.5 2 2.5 3 3.5 4 return loss (db) frequency (ghz) 31 db 16 db 1 db 2 db 4 db i.l.db 8 db -35 -30 -25 -20 -15 -10 -5 0 00.511.522.533.54 normalized attenuation (db) frequency (ghz) -1 -0.5 0 0.5 1 1.5 2 0 4 8 12 16 20 24 28 32 bit error (db) attenuation state (db) 3 ghz 40 mhz 500 mhz 2 ghz 1 ghz 100 mhz -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 0 0.5 1 1.5 2 2.5 3 3.5 4 bit error (db) frequency (ghz) 16 db 31 db 1-8 db -40 -20 0 20 40 60 80 100 0 0.5 1 1.5 2 2.5 3 3.5 4 relative phase (deg) frequency (ghz) 31 db 16 db 8 db 1-4 db hmc470lp3 / 470lp3e v04.1108 1 db lsb gaas mmic 5-bit digital positive control attenuator, dc - 3 ghz
attenuators - smt 5 5 - 146 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 voltage bias voltage & current worst case step error between successive attenuation states vdd = +5v 10% vdd (v) idd (typ.) (ma) +4.5 4.0 +5.0 4.2 +5.5 4.4 state bias condition low 0 to +0.8v @ -5 ua typ. high +2.0 to + 5 vdc @ 40 ua typ. note: vdd = +5v control voltage input attenuation state rf1 - rf2 v1 16 db v2 8 db v3 4 db v4 2 db v5 1 db high high high high high reference i.l. high high high high low 1 db high high high low high 2 db high high low high high 4 db high low high high high 8 db low high high high high 16 db low low low low low 31 db any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected. -1 -0.6 -0.2 0.2 0.6 1 0 0.5 1 1.5 2 2.5 3 3.5 4 step error (db) frequency (ghz) hmc470lp3 / 470lp3e v04.1108 1 db lsb gaas mmic 5-bit digital positive control attenuator, dc - 3 ghz
attenuators - smt 5 5 - 147 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 rf input power (dc - 3 ghz) +27 dbm (t = +85 c) control voltage range (v1 to v5) -1v to vdd +1v bias voltage (vdd) +7v channel temperature 150 c continuous pdiss (t = 85 c) (derate 7.7 mw/c above 85 c) 0.5 w thermal resistance 130 c/w storage temperature -65 to +150 c operating temperature -40 to +85 c 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. electrostatic sensitive device observe handling precautions part number package body material lead finish msl rating package marking [3] hmc470lp3 low stress injection molded plastic sn/pb solder msl1 [1] 470 xxxx HMC470LP3E rohs-compliant low stress injection molded plastic 100% matte sn msl1 [2] 470 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 hmc470lp3 / 470lp3e v04.1108 1 db lsb gaas mmic 5-bit digital positive control attenuator, dc - 3 ghz
attenuators - smt 5 5 - 148 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 1vdd supply voltage. 2, 11 rf1, rf2 this pin is dc coupled and matched to 50 ohm. blocking capacitors are required. select value based on lowest frequency of operation. 3, 10 n/c these pins should be connected to pcb rf ground to maximize performance. 4 - 9 acg1 - acg6 external capacitor to ground is required. select value for lowest frequency of operation. place capacitor as close to pins as possible. 12 - 16 v1 - v5 see truth table and control voltage table. gnd package bottom has an exposed metal paddle that must also be connected to rf ground. application circuit hmc470lp3 / 470lp3e v04.1108 1 db lsb gaas mmic 5-bit digital positive control attenuator, dc - 3 ghz
attenuators - smt 5 5 - 149 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 107006 [1] item description j1 - j2 pc mount sma connector j3 12 pin dc connector c1 1000 pf capacitor, 0603 pkg. c2, c3 1000 pf capacitor, 0402 pkg. c4 - c7 330 pf capacitor, 0402 pkg. u1 hmc470lp3 / HMC470LP3E digital attenuator pcb [2] 106978 evaluation pcb [1] reference this number when ordering complete evaluation pcb [2] circuit board material: rogers 4350re hmc470lp3 / 470lp3e v04.1108 1 db lsb gaas mmic 5-bit digital positive control attenuator, dc - 3 ghz
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