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 attenu a tors - digi t al - s m t 5 5 - 1 discontinued product not recommended for new designs hmc542lp4 / 542lp4e 0.5 db lsb gaas mmic 6-bit digital serial control attenuator, dc - 3 ghz v03.0809 functional diagram electrical specifcations, t a = +25 c, with vcc = +5v t he hmc542lp4( e ) is ideal for: ? cellular/pc s /3g infrastructure ? i s m, mmd s , wla n , wimax, & wibro ? microwave r adio & v s a t ? t est e quipment and s ensors 0.5 db l s b s teps to 31.5 db tt l/cm os compatible s erial data interface s pi compatible s erial o utput 0.25 db t ypical s tep e rror s ingle +5v s upply 24 lead 4x4mm qf n package: 16mm2 t he hmc542lp4( e ) is a broadband 6-bit gaas ic digital attenuator with a cm os compatible serial to parallel driver in low cost leadless surface mount package. t his serial control digital attenuator incorp rates off chip ac ground capacitors for near dc opera - tion, making it suitable for a wide variety of r f and if applications. covering dc to 3 ghz, the insertion loss is 1.5 db and the attenuator bit values are 0.5 (l s b), 1, 2, 4, 8, and 16 db for a total attenuation of 31.5 db. attenuation accuracy is excellent at 0.25 db typi - cal step error with an iip3 of +45 dbm. s ix bit serial control words are used to select each attenuation state. a single vdd bias of +5v is required. parameter frequency (ghz) min. t yp. max. u nits insertion loss dc - 1.5 ghz 1.5 - 3.0 ghz 1.2 1.5 1.5 1.8 db db attenuation r ange dc - 3 ghz 31.5 db r eturn loss ( r f1 & r f2, all atten. s tates) dc - 3 ghz 17 db attenuation accuracy: ( r eferenced to insertion loss) all attenuation s tates 0.5 - 3.5 db s tates 4.0 - 31.5 db s tates all attenuation s tates dc - 1.0 ghz 1.0 - 2.2 ghz 1.0 - 2.2 ghz 2.2 - 3.0 ghz (0.20 + 3% of atten. s etting) max. (0.25 + 3% of atten. s etting) max. (0.15 + 4% of atten. s etting) max. (0.30 + 3% of atten. s etting) max. db db db db input power for 0.1 db compression 0.1 - 3.0 ghz 20 dbm input t hird o rder intercept point ( t wo- t one input power= 0 dbm e ach t one) 0.1 - 1.5 ghz 1.5 - 3.0 ghz 35 45 dbm dbm s witching characteristics t r i se , tfall (10/90% r f) t on , t o ff (50% c t l to 10/90% r f) dc - 3 ghz 800 900 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 attenu a tors - digi t al - s m t 5 5 - 2 discontinued product not recommended for new designs 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 normalized attenuation (db) frequency (ghz) -40 -20 0 20 40 60 80 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 -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 0.5-8b 31.5 db -40 -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) 0.5-16 db 31.5 db -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 0 4 8 12 16 20 24 28 32 bit error (db) attenuation state (db) 3 ghz 2 ghz 1 ghz 500 mhz 40 mhz 100 mhz hmc542lp4 / 542lp4e v03.0809 0.5 db lsb gaas mmic 6-bit digital serial control attenuator, dc - 3 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 attenu a tors - digi t al - s m t 5 5 - 3 discontinued product not recommended for new designs worst case step error between successive attenuation states -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 0 0.5 1 1.5 2 2.5 3 3.5 4 step error (db) frequency (ghz) timing diagram truth table control voltage input c16 c8 c4 c2 c1 c0.5 high high high high high high r eference 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. digital control voltages s tate vcc = +5v low 0 to 1.3v high 3.5 to 5v parameter s ymbol vcc = +5v u nits min. max. s erial input s etup t ime ts 20 - ns hold time from s erial input to s hift clock th 0 - ns s etup time from s hift clock to latch e nable tlsup 40 - ns latch e nable window, latch e nable to c0.5 through c8 tpd - 30 ns s etup time from r eset to s hift clock - 20 - ns clock frequency (1/tclk) fclk - 30 mhz timing serial input truth table latch e nable s hift clock r eset function x x l s hift register cleared x h s hift register clocked x h contents of shift register transferred to digital attenuator hmc542lp4 / 542lp4e v03.0809 0.5 db lsb gaas mmic 6-bit digital serial control attenuator, dc - 3 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 attenu a tors - digi t al - s m t 5 5 - 4 discontinued product not recommended for new designs logic / functional diagram programming example to select 16 db attenuation state hmc542lp4 / 542lp4e v03.0809 0.5 db lsb gaas mmic 6-bit digital serial control attenuator, dc - 3 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 attenu a tors - digi t al - s m t 5 5 - 5 discontinued product not recommended for new designs pin n umber function description interface s chematic 1, 3, 5, 14, 16-18, 23 n /c t he pins are not connected internally; however, all data shown herein was measured with these pins connected to r f/dc ground externally. 2 vcc s upply voltage. 4, 15 r f1, r f2 t his pin is dc coupled and matched to 50 o hms blocking capacitors are required. s elect value based on lowest frequency of operation. 6 - 11, 13 acg1 - acg7 e xternal capacitor to ground is required. s elect value for lowest frequency of operation. place capacitor as close to pins as possible. 12 n /c t his pin is not connected internally and any connection made to it externally will have no effect on product performance. 19 s erial o utput s erial data output. s erial input data delayed by 8 clock cycles 20 r eset s ee truth table, control voltage table and timing diagram. 21 s hift clock 22 latch e nable 24 s erial input g n d package bottom has an exposed metal paddle that must be connected to r f/dc ground. pin descriptions hmc542lp4 / 542lp4e v03.0809 0.5 db lsb gaas mmic 6-bit digital serial control attenuator, dc - 3 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 attenu a tors - digi t al - s m t 5 5 - 6 discontinued product not recommended for new designs application circuit hmc542lp4 / 542lp4e v03.0809 0.5 db lsb gaas mmic 6-bit digital serial control attenuator, dc - 3 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 attenu a tors - digi t al - s m t 5 5 - 7 discontinued product not recommended for new designs absolute maximum ratings outline drawing r f input power (dc - 3 ghz) +27 dbm ( t = +85 c) digital inputs ( r eset , s hift clock, latch e nable & s erial input) -1.5 to (vcc +1.5) v bias voltage (vcc) +7v channel t emperature 150 c continuous pdiss ( t = 85 c) (derate 7.7 mw/ c above 85 c) 0.5 w t hermal r esistance 130 c/w s torage t emperature -65 to +150 c o perating t emperature -40 to +85 c notes : 1. l e adf r am e ma ter ial: c o pp er all o y 2. dim ens i ons a re i n i n ch es [millim eters ] 3. l e ad s paci n g to l er a n c e i s non -c u m u la t iv e . 4. pad b urr l en g t h s hall b e 0.15mm maxim u m. pad b urr h e igh t s hall b e 0.05mm maxim u m. 5. packag e wa r p s hall not e xc ee d 0.05mm. 6. all g roun d l e ad s a n d g roun d paddl e m ust b e so ld ere d to pcb r f g roun d. 7. re f er to hi tt i te applica t i on note f or su gg este d la n d pa ttern . e l e c trost a t ic sens i t iv e de vic e o b ser v e ha n dli n g p re ca ut i ons part n umber package body material lead finish m s l r ating package marking [3] hmc542lp4 low s tress injection molded plastic s n/pb s older m s l1 [1] h542 xxxx hmc542lp4 e r oh s -compliant low s tress injection molded plastic 100% matte s n m s l1 [2] h542 xxxx [1] max peak refow temperature of 235 c [2] max peak refow temperature of 260 c [3] 4-digit lot number xxxx package information bias voltage vcc (v) idd ( t yp.) (ma) +4.5 4.7 +5.0 5.0 +5.5 5.3 hmc542lp4 / 542lp4e v03.0809 0.5 db lsb gaas mmic 6-bit digital serial control attenuator, dc - 3 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 attenu a tors - digi t al - s m t 5 5 - 8 discontinued product not recommended for new designs evaluation pcb t he circuit board used in the fnal application should use r f circuit design techniques. s ignal lines should have 50 o hm 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. t he evaluation circuit board shown is available from hittite upon request. list of materials for evaluation pcb 114399 [1] item description j1 - j2 pcb mount s ma 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. u 1 hmc542lp4( e ) digital attenuator pcb [2] 114398 e valuation pcb [1] r eference this number when ordering complete evaluation pcb [2] circuit board material: r ogers 4350 or arlon 25f r hmc542lp4 / 542lp4e v03.0809 0.5 db lsb gaas mmic 6-bit digital serial control attenuator, dc - 3 ghz
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