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 attenuators - digital - smt 5 5 - 140 HMC472LP4 / 472lp4e 0.5 db lsb gaas mmic 6-bit digital positive control attenuator, dc - 3.8 ghz v06.1108 functional diagram electrical speci cations, t a = +25 c, with vdd = +5v & vctl = 0/+5v (unless otherwise noted) the HMC472LP4(e) is ideal for: ? 3g infrastructure & access points ? cellular/3g, lte & umb ? wimax, wibn & fixed wireless ? test equipment and sensors ? gsm, wcdma & td-scdma 0.5 db lsb steps to 31.5 db single control line per bit ttl/cmos compatible control 0.25 db typical step error single +5v supply 24 lead ceramic 4x4mm smt package: 16mm2 included in the hmc-dk004 designers kit the HMC472LP4 & HMC472LP4e are broadband 6-bit gaas ic digital attenuators in low cost leadless surface mount 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 3.8 ghz, the insertion loss is less than 2.0 db typical. the attenuator bit values are 0.5 (lsb), 1, 2, 4, 8, and 16 db for a total attenuation of 31.5 db. attenuation accuracy is excellent at 0.25 db typical step error with an iip3 of +45 dbm. six ttl/ cmos control inputs 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 - 1.5 ghz 1.5 - 3.0 ghz 3.0 - 3.8 ghz 1.5 2.0 2.3 1.8 2.3 3 db db db attenuation range dc - 3.8 ghz 31.5 db return loss (rf1 & rf2, all atten. states) dc - 3.8 ghz 15 db attenuation accuracy: (referenced to insertion loss) all attenuation states 0.5 - 3.5 db states 4.0 - 31.5 db states all attenuation states all attenuation states dc - 1.0 ghz 1.0 - 2.2 ghz 1.0 - 2.2 ghz 2.2 - 3.0 ghz 3.0 - 3.8 ghz (0..20 + 3% of atten. setting) max. (0.25 + 3% of atten. setting) max. (0.15 + 4% of atten. setting) max. (0.30 + 3% of atten. setting) max (0.35 + 5% of atten. setting) max. db db db db db input power for 0.1 db compression 0.1 - 3.8 ghz 20 dbm input third order intercept point (two-tone input power= 0 dbm each tone) ref - 15.5 db states 16.0 - 31.5 db states 0.1 - 3.8 ghz 45 35 dbm dbm switching characteristics trise, tfall (10/90% rf) ton, toff (50% ctl to 10/90% rf) dc - 3.8 ghz 130 140 ns ns typical applications features general description
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 attenuators - digital - smt 5 5 - 141 return loss rf1, rf2 (only major states are shown) insertion loss normalized attenuation (only major states are shown) -3 -2.5 -2 -1.5 -1 -0.5 0 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 +25c +85c -40c insertion loss (db) frequency (ghz) -35 -30 -25 -20 -15 -10 -5 0 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 return loss (db) frequency (ghz) -35 -30 -25 -20 -15 -10 -5 0 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 normalized attenuation (db) frequency (ghz) HMC472LP4 / 472lp4e v06.1108 0.5 db lsb gaas mmic 6-bit digital positive control attenuator, dc - 3.8 ghz insertion loss -3 -2.5 -2 -1.5 -1 -0.5 0 0.05 0.5 1 1.5 2 2.5 3 3.5 4 +25 c +85 c -40 c insertion loss (db) frequency (ghz) return loss rf1, rf2 (only major states are shown) -35 -30 -25 -20 -15 -10 -5 0 0.05 0.5 1 1.5 2 2.5 3 3.5 4 return loss (db) frequency (ghz) 0.5-16 db 31.5 db normalized attenuation (only major states are shown) -35 -30 -25 -20 -15 -10 -5 0 0.05 0.5 1 1.5 2 2.5 3 3.5 4 normalized attenuation (db) frequency (ghz)
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 attenuators - digital - smt 5 5 - 142 HMC472LP4 / 472lp4e v06.1108 0.5 db lsb gaas mmic 6-bit digital positive control attenuator, dc - 3.8 ghz bit error vs. frequency (only major states are shown) bit error vs. attenuation state -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 bit error (db) frequency (ghz) 16 db 31.5 db 8 db 0.5-4 db bit error vs. frequency without ac ground caps (only major states are shown) -2 -1.5 -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) 3.8 ghz 100mhz, 2ghz 1 ghz 40mhz, 500 mhz 3 ghz -3 -2.5 -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 2.5 3 0 0.5 1 1.5 2 2.5 3 3.5 4 bit error (db) frequency (ghz) 16 db 31.5 db 0.5 - 8 db bit error vs. attenuation state -1 -0.9 -0.8 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0 0 4 8 12 16 20 24 28 32 bit error (db) attenuation state (db) 50 mhz 200mhz, 300mhz, 350mhz 100 mhz bit error vs. frequency (only major states are shown) -2 -1 0 1 2 0.05 0.5 1 1.5 2 2.5 3 3.5 4 bit error (db) frequency (ghz) 16 db 8 db 0.5-4 db 31.5 db
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 attenuators - digital - smt 5 5 - 143 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 4.7 +5.0 5.0 +5.5 5.3 state bias condition low 0 to +0.8 vdc @ -5 ua typ. high + 2.0 to + 5.0 vdc @ 40 ua typ. note: vdd = +5v control voltage input attenua- tion state rf1 - rf2 v1 16 db v2 8 db v3 4 db v4 2 db v5 1 db v6 0.5 db high high high high high high reference i.l. high high high high high low 0.5 db high high high high low high 1 db high high high low high high 2 db high high low high high high 4 db high low high high high high 8 db low high high high high high 16 db low low low low low low 31.5 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) -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) 8 db 16 db 31.5 db 0.5-4 db relative phase vs. frequency (only major states are shown) HMC472LP4 / 472lp4e v06.1108 0.5 db lsb gaas mmic 6-bit digital positive control attenuator, dc - 3.8 ghz
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 attenuators - digital - smt 5 5 - 144 HMC472LP4 / 472lp4e v06.1108 0.5 db lsb gaas mmic 6-bit digital positive control attenuator, dc - 3.8 ghz absolute maximum ratings outline drawing rf input power (dc - 3 ghz) +27 dbm (t = +85 c) control voltage range (v1 to v6) -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] HMC472LP4 low stress injection molded plastic sn/pb solder msl1 [1] h472 xxxx HMC472LP4e rohs-compliant low stress injection molded plastic 100% matte sn msl1 [2] h472 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
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 attenuators - digital - smt 5 5 - 145 pin descriptions pin number function description interface schematic 1, 3, 5, 12, 14, 16, 17, 18 n/c these pins should be connected to pcb rf ground to maximize performance. 2vdd supply voltage. 4, 15 rf1, rf2 this pin is dc coupled and matched to 50 ohm. blocking capacitors are required. select value based on lowest frequency of operation. 6 - 11, 13 acg1 - acg7 external capacitors to ground are recommended for low and high frequency operation. select value for lowest frequency of operation. place capacitor as close to pins as possible. for operation from 700 to 2700 mhz, these pins may be left unconnected. 19 - 24 v1 - v6 see truth table and control voltage table. gnd package bottom has an exposed metal paddle that must also be connected to rf/dc ground. HMC472LP4 / 472lp4e v06.1108 0.5 db lsb gaas mmic 6-bit digital positive control attenuator, dc - 3.8 ghz
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 attenuators - digital - smt 5 5 - 146 HMC472LP4 / 472lp4e v06.1108 0.5 db lsb gaas mmic 6-bit digital positive control attenuator, dc - 3.8 ghz application circuit note: for operations from 700 to 2700 mhz, pins 6 through 13 may be left unconnected.
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 attenuators - digital - smt 5 5 - 147 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 107010 [1] item description j1 - j2 pcb mount sma connector j3 14 pin dc connector c1 1000 pf capacitor, 0603 pkg. c2, c3 1000 pf capacitor, 0402 pkg. c4 - c7 330 pf capacitor, 0402 pkg. u1 HMC472LP4 / HMC472LP4e digital attenuator pcb [2] 106977 evaluation pcb [1] reference this number when ordering complete evaluation pcb [2] circuit board material: rogers 4350 HMC472LP4 / 472lp4e v06.1108 0.5 db lsb gaas mmic 6-bit digital positive control attenuator, dc - 3.8 ghz
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