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 - 116 0.5 db lsb gaas mmic 6-bit digital positive control attenuator, 2.2 - 8.0 ghz functional diagram electrical specifi cations, t a = +25 c, with vdd = +5v & vctl = 0/+5v (unless otherwise noted) the hmc425lp3 / HMC425LP3E is ideal for: ? wlan & point-to-multi-point ? fiber optics & broadband telecom ? microwave radio & vsat ? military 0.5 db lsb steps to 31.5 db single control line per bit 0.5 db typical bit error single +5v supply 3x3 mm smt package the hmc425lp3 & HMC425LP3E are broadband 6-bit gaas ic digital attenuators in low cost leadless surface mount packages. covering 2.2 to 8.0 ghz, the insertion loss is less then 3.8 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 0.5 db typical step error with an iip3 of +40 dbm. six control voltage inputs, toggled between 0 and +3 to +5v, are used to select each attenuation state. a single vdd bias of +3 to +5v is required. parameter frequency (ghz) min. typ. max. units insertion loss 2.2 - 6.0 ghz 6.0 - 8.0 ghz 3.5 3.8 3.8 4.3 db db attenuation range 2.2 - 8.0 ghz 31.5 db return loss (rf1 & rf2, all atten. states) 2.2 - 8.0 ghz 15 db attenuation accuracy: (referenced to insertion loss) all states 2.2 - 8.0 ghz 0.5 + 5% of atten. setting max. db input power for 0.1 db compression vdd = 5v vdd = 3v 2.2 - 8.0 ghz 22 19 dbm dbm input third order intercept point (two-tone input power= 0 dbm each tone) ref - 16.0 db states 16.5 - 31.5 db states 2.2 - 8.0 ghz 45 35 dbm dbm switching characteristics trise, tfall (10/90% rf) ton, toff (50% ctl to 10/90% rf) 2.2 - 8.0 ghz 160 180 ns ns hmc425lp3 / 425lp3e v03.0409 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 - 117 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 -10 -8 -6 -4 -2 0 12345678910 +25 c +85 c -40 c insertion loss (db) frequency (ghz) -25 -20 -15 -10 -5 0 12345678910 0.5 db 1 db 2 db 4 db 8 db 16 db 31.5 db return loss (db) frequency (ghz) -35 -30 -25 -20 -15 -10 -5 0 12345678910 0.5 db 1 db 2 db 4 db 8 db 16 db 31.5 db normalized attenuation (db) frequency (ghz) -2 -1 0 1 2 0 4 8 12 16 20 24 28 32 2.4 ghz 3.5 ghz 5.5 ghz 8.0 ghz bit error (db) attenuation state (db) -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 12345678910 0.5 db 1 db 2 db 4 db 8 db 16 db 31.5 db bit error (db) frequency (ghz) -40 -20 0 20 40 60 80 12345678910 0.5 db 1 db 2 db 4 db 8 db 16 db 31.5 db relative phase (deg) frequency (ghz) hmc425lp3 / 425lp3e v03.0409 0.5 db lsb gaas mmic 6-bit digital positive control attenuator, 2.2 - 8.0 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 - 118 truth table control voltage bias voltage & current worst case step error between successive attenuation states vdd range = 3.0 to +5.0 vdc vdd (vdc) idd (typ.) (a) +3.0 10 +5.0 30 state bias condition low 0 to 0.2v @ 10 ua typ. high vdd 0.2v @ 5 ua typ. note: vdd = +3v to +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. -1.2 -0.8 -0.4 0 0.4 0.8 1.2 12345678910 step error (db) frequency (ghz) hmc425lp3 / 425lp3e v03.0409 0.5 db lsb gaas mmic 6-bit digital positive control attenuator, 2.2 - 8.0 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 - 119 absolute maximum ratings outline drawing control voltage (v1 to v6) vdd +0.5 vdc bias voltage (vdd) +7.0 vdc staorage temperature -65 to +150 c operating temperature -40 to +85 c rf input power (2.4 - 8.0 ghz) +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] hmc425lp3 low stress injection molded plastic sn/pb solder msl1 [1] 425 xxxx HMC425LP3E rohs-compliant low stress injection molded plastic 100% matte sn msl1 [2] 425 xxxx [1] max peak refl ow temperature of 235 c [2] max peak refl 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. hmc425lp3 / 425lp3e v03.0409 0.5 db lsb gaas mmic 6-bit digital positive control attenuator, 2.2 - 8.0 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 - 120 pin descriptions pin number function description interface schematic 1, 3, 10, 12 gnd package bottom has an exposed metal paddle that must also be connected to rf ground. 2, 11 rfin, rfout this pin is dc coupled and matched to 50 ohm. blocking capacitors are required. 4, 5, 6, 7, 8, 9 v1 - v6 see truth table and control voltage table. 13, 14, 16 n/c this pin should be connected to pcb rf ground to maximize performance. 15 vdd supply voltage. hmc425lp3 / 425lp3e v03.0409 0.5 db lsb gaas mmic 6-bit digital positive control attenuator, 2.2 - 8.0 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 - 121 evaluation pcb the circuit board used in the fi 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. * r1 - r6 = 100 ohm. these resistors are optional and may be used to enhance decoupling of the rf path from the control inputs. item description j1 - j2 pcb mount sma connector j3 8 pin dc connector c1 0.01 f capacitor, 0603 pkg. c2, c3 100 pf capacitor, 0402 pkg. r1 - r6 100 ohm resistor, 0603 pkg. u1 hmc425lp3 / HMC425LP3E digital attenuator pcb [2] 105260 evaluation pcb [1] reference this number when ordering complete evaluation pcb [2] circuit board material: rogers 4350 list of materials for evaluation pcb 105408 [1] hmc425lp3 / 425lp3e v03.0409 0.5 db lsb gaas mmic 6-bit digital positive control attenuator, 2.2 - 8.0 ghz
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