attenuators - smt 5 5 - 170 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 hmc540lp3 / 540lp3e 1 db lsb gaas mmic 4-bit digital positive control attenuator, dc - 5.5 ghz v00.0605 functional diagram electrical speci cations, t a = +25 c, with vdd = +5v & vctl = 0/+5v (unless otherwise noted) the hmc540lp3 / HMC540LP3E is ideal for both rf and if applications: ? cellular infrastructure ? ism, mmds, wlan, wimax, wibro ? microwave radio & vsat ? test equipment and sensors 1 db lsb steps to 15 db 0.2 db typical step error low insertion loss: 1 db high ip3: +50 dbm single control line per bit ttl/cmos compatible control single +5v supply 3x3 mm smt package the hmc540lp3 & HMC540LP3E are broadband 4-bit gaas ic digital attenuators in low cost leadless surface mount packages. this single positive control line per bit digital attenuator utilizes off chip ac ground capacitors for near dc operation, making it suitable for a wide variety of rf and if applications. covering dc to 5.5 ghz, the insertion loss is less than 1 db typical. the attenuator bit values are 1 (lsb), 2, 4 and 8 db for a total attenuation of 15 db. attenuation accuracy is excellent at 0.2 db typical step error. the attenuator also features a iip3 of +50 dbm. four 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 - 2.0 ghz 2.0 - 3.0 ghz 3.0 - 4.0 ghz 4.0 -5.5 ghz 0.8 1.0 1.3 2.2 1.1 1.3 1.6 2.6 db db db db attenuation range dc - 5.5 ghz 15 db return loss (rf1 & rf2, all atten. states) dc - 3.5 ghz 3.5 - 5.5 ghz 20 15 db db attenuation accuracy: (referenced to insertion loss) all states dc - 1.0 ghz 1.0 - 4.0 ghz 4.0 - 5.0 ghz 5.0 - 5.5 ghz (0.2 + 2% of atten. setting) max. (0.2 + 3% of atten. setting) max. (0.3 + 5% of atten. setting) max. (0.4 + 8% of atten. setting) max. db db db db input power for 0.1 db compression 0.1 - 5.5 ghz 27 dbm input third order intercept point (two-tone input power= 0 dbm each tone) ref - 4 db states 5 - 15 db states 0.1 - 5.5 ghz 50 45 dbm dbm switching characteristics trise, tfall (10/90% rf) ton, toff (50% ctl to 10/90% rf) dc -5.5 ghz 95 100 ns ns typical applications features general discription
attenuators - smt 5 5 - 171 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) -1 -0.5 0 0.5 1 1.5 2 0 4 8 12 16 bit error (db) attenuation state (db) 5 ghz 5.5 ghz 1 ghz 100 mhz 4 ghz -20 -16 -12 -8 -4 0 0123456 normalized attenuation (db) frequency (ghz) -1 -0.5 0 0.5 1 1.5 0123456 bit error (db) frequency (ghz) 8 db 15 db 1-4 db -40 -30 -20 -10 0 10 20 30 40 0123456 relative phase (deg) frequency (ghz) 15 db 8 db 1-4 db -40 -30 -20 -10 0 0123456 return loss (db) frequency (ghz) 1 db 2 db 4 db i.l.db 8 db 15 db hmc540lp3 / 540lp3e 1 db lsb gaas mmic 4-bit digital positive control attenuator, dc - 5.5 ghz v00.0605
attenuators - smt 5 5 - 172 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 = +5.0 vdc 10% vdd (vdc) idd (typ.) (ma) +4.5 3.0 +5.0 3.2 +5.5 3.4 state bias condition low 0 to +0.8v @ -5 ua typ. high +2.0 to + 5.0 vdc @ 40 ua typ. note: vdd = +5v control voltage input attenuation state rf1 - rf2 v1 8 db v2 4 db v3 2 db v4 1 db high high high high reference i.l. high high high low 1 db high high low high 2 db high low high high 4 db low high high high 8 db low low low low 15 db any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected. -0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0123456 step error (db) frequency (ghz) hmc540lp3 / 540lp3e 1 db lsb gaas mmic 4-bit digital positive control attenuator, dc - 5.5 ghz v00.0605
attenuators - smt 5 5 - 173 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 - 5.5 ghz) +29 dbm (t = +85 c) control voltage range (v1 to v4) -1v to vdd +1v bias voltage (vdd) +7.0 vdc channel temperature 150 c continuous pdiss (t = 85 c) (derate 11.7 mw/c above 85 c) 0.769 w thermal resistance 85 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 hmc540lp3 / 540lp3e 1 db lsb gaas mmic 4-bit digital positive control attenuator, dc - 5.5 ghz v00.0605 part number package body material lead finish msl rating package marking [3] hmc540lp3 low stress injection molded plastic sn/pb solder msl1 [1] 540 xxxx HMC540LP3E rohs-compliant low stress injection molded plastic 100% matte sn msl1 [2] 540 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
attenuators - smt 5 5 - 174 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, 7, 9, 10, 12 n/c these pins should be connected to pcb rf ground to maximize performance. 4 - 6, 8 acg1 - acg4 external capacitor to ground is required. select value for lowest frequency of operation. place capacitor as close to pins as possible. 13 - 16 v1 - v4 see truth table and control voltage table. gnd package bottom has an exposed metal paddle that must be connected to rf/dc ground. application circuit hmc540lp3 / 540lp3e 1 db lsb gaas mmic 4-bit digital positive control attenuator, dc - 5.5 ghz v00.0605 recommended component values c1 - c3 1,000 pf 10% c4, c5 330 pf 10%
attenuators - smt 5 5 - 175 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 111315 [1] item description j1 - j2 pcb mount sma connector j3 - j8 dc pin c1 - c3 1000 pf capacitor, 0402 pkg. c4, c5 330 pf capacitor, 0402 pkg. u1 hmc540lp3 / HMC540LP3E digital attenuator pcb [2] 111291 evaluation pcb [1] reference this number when ordering complete evaluation pcb [2] circuit board material: rogers 4350 hmc540lp3 / 540lp3e 1 db lsb gaas mmic 4-bit digital positive control attenuator, dc - 5.5 ghz v00.0605
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