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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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 1 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz v00.0409 HMC795LP5E general d escription features functional d iagram t ypical a pplications e lectrical specifcations , see t est c onditions on following page t he hmc795 l p5 e is a variable gain, direct quadrature modulator ideal for digital modulation applications from 50 - 2800 mhz including: cellular/3g, broadband wireless access and is m circuits. housed in a compact 5x5mm ( l p5) s m t q fn package, the modulator offers a high level of integration, exceptionally low carrier feedthrough, and a low cost alternative to more complicated double upconversion architectures. t he l o requires -9 to +3 dbm and can be driven in either differential or single-ended mode. t he baseband inputs will support modulation inputs from d c - 440 mhz. t he differential rf output port is driven by a 6 bit digital controlled variable gain amplifer to nominally provide up to 32 db of very linear gain control in 0.5 db steps. t he low carrier suppression is maintained over the vga dynamic range. t he gain control interface accepts either three wire serial input or 6 bit parallel word. i n addition, the gain control can be modifed through the s p i to adjust a look up table to control the gain step to as low as 0.1 db, with reduced range, or to adjust individual gain steps for system linearization. high l inearity o i p3: + 22 dbm high output power: +10 dbm output p1db high carrier s uppression: 55 dbc high s ideband s uppression: 53 dbc read/write s erial port i nterface ( s p i ) s p i & 6-bit parallel port programmable 32 db gain control d c - 440 mhz baseband i nput 32 l ead 5x5 mm q fn package: 25 mm 2 t he hmc795 l p5 e is ideal for: ? u m ts , gs m or c d ma basestations ? fixed wireless or w ll ? is m t ransceivers, 900 & 2400 mhz ? gm s k, q p s k, q am, ss b modulators ? cellular/3g and wimax/4g ? microwave i fs parameter min. t yp. max. min. t yp. max. min. t yp. max. u nits rf frequency 1000 1950 2690 mhz output power 8 9.5 11 7 9 11 4 8 11 db output p1db 13 14 9 11 9 11 dbm output i p3 23 25 18 22 17 22 dbm carrier feedthrough ( u ncal) -40 -45 -42 -46 -42 -46 dbm carrier feedthrough (cal) -55 -62 -55 -62 -52 -57 dbm s ideband s uppression ( u ncal) 43 55 49 53 45 50 dbc output noise floor @ 20 mhz offset -158 -157 -156 -155 -154 -153 dbm/hz rf return l oss -10 -14 -10 -12 -10 -12 db l o return l oss -10 -15 -10 -15 -10 -12 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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 2 HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz parameter conditions min. t yp. max. u nits gain control characteristics gain control range -31.5 0 db gain control s tep can be adjusted with s p i 0.5 db s tate e rror (at max attenuation) 0.5 1 db gain s tep e rror 0.05 0.13 db rf input characteristics rf frequency range 50 2800 mhz rf return l oss requires external matching 9 -15 -10 db rf bandwidth with matching specifed in table 5 10 15 % lo input characteristics l o frequency range 100 5600 mhz l o return l oss required 1 nf blocking cap -10 db l o d rive l evel -9 0 +3 dbm baseband inputs i / q i nput bias l evel output power 0.5 db of t yp. 1.2 1.3 1.4 v i nput bias current 90 a d ifferential i nput i mpedance 5k||100pf ohms||pf bandwidth d c 440 mhz dc power requirements analog s upply voltage (vccm i x, vccbg, vccrf, vcc d ac, vcc l o) all must be equal 4.5 5 5.5 v d igital s upply voltage (v dd 3) 3 3.3 3.5 v idd - t otal current consumption 106 127 145 ma power d own current 1 a e lectrical specifcations (continued) parameter condition t emperature 25 c vga attenuation 0 db baseband i nput frequency 1 mhz baseband i nput d c voltage 1.3v baseband i nput ac voltage (peak to peak d ifferential, i and q ) 1.4v baseband i nput ac voltage for o i p3 measurement (peak to peak d ifferential, i and q ) 290 mv per tone @ 1 & 1.5 mhz frequency offset for output noise measurements 20 mhz s upply analog: +5v, d igital: +3.3v l o i nput power 0 dbm l o i nput mode d ifferential s ideband and carrier s uppression u ncalibrated rf output mode d ifferential t est c onditions: u nless o therwise specifed, the following t est c onditions were u sed
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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 3 HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz c alibrated vs. u ncalibrated t est r esults d uring the u ncalibrated carrier s uppression tests, care is taken to ensure that the i / q signal paths from the vector s ignal generator (v s g) to the d evice u nder t est ( dut ) are equal. t he u ncalibrated carrier s uppression plots were measured at t = -40 c, +25 c, and +85 c. t he calibrated carrier s uppression data was plotted after a manual adjustment of the i p/ i n & q p/ q n d c offsets at +25 c, 5v vcc, 0 dbm l o input power level, and the rf output frequency set to the midband of the measurement range. t he adjustment settings were held constant during tests over temperature and frequency. o utput power, o utput i p3 & sideband suppression vs. freq. over t emperature [1] t ypical performance c haracteristics, v cc +5 v , lo 0 d b m, +25 c o utput power & o utput n oise @ 1 ghz vs. v g a a ttenuation over t emperature [1] u ncalibrated & c alibrated c arrier feedthrough vs. freq. over t emperature [1] c arrier feedthrough & sideband suppression @ 1 ghz vs. v g a a ttenuation over t emperature [1] -20 -10 0 10 20 30 40 -60 -50 -40 -30 -20 -10 0 800 850 900 950 1000 1050 1100 1150 1200 +25 c +85 c -40 c frequency (mhz) output power (dbm), output ip3 (dbm) sideband suppression (dbc) output power sideband suppression output ip3 -80 -75 -70 -65 -60 -55 -50 -45 -40 800 850 900 950 1000 1050 1100 1150 1200 +25 c +85 c -40 c frequency (mhz) carrier feedthrough (dbm) uncalibrated calibrated -40 -30 -20 -10 0 10 20 -180 -170 -160 -150 -140 -130 -120 0 4 8 12 16 20 24 28 32 +25 c +85 c -40 c attenuation (db) output power (dbm) output noise @ 20 mhz (dbm/hz) output power output noise -90 -85 -80 -75 -70 -65 -60 -55 -50 -60 -55 -50 -45 -40 0 4 8 12 16 20 24 28 32 +25 c +85 c -40 c attenuation (db) carrier feedthrough (dbm) sideband suppression (dbc) carrier feedthrough sideband suppression [1] output matched to 1 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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 4 HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz o utput power & o utput n oise @ 1 ghz vs. i nput b aseband a mplitude over t emperature [1] o utput power, o utput i p3 & sideband suppression vs. freq. over lo power [1] o utput power, o utput i p3 & sideband sup - pression vs. freq. over supply v oltage [1] c arrier feedthrough & sideband suppression @ 1 ghz vs. i nput b aseband a mplitude over t emperature [1] u ncalibrated & c alibrated c arrier feedthrough vs. freq. over lo power [1] u ncalibrated & c alibrated c arrier feed- through vs. freq. over supply v oltage [1] -10 -5 0 5 10 15 20 -160 -155 -150 -145 +25 c +85 c -40 c 0.1 1 output noise @ 20 mhz (dbm/hz) input baseband amplitude (vp-p diff) output power output noise output power (dbm) op1db 14.1 dbm op1db 14.3 dbm op1db 14.0 dbm 2 3 -20 -10 0 10 20 30 40 -60 -50 -40 -30 -20 -10 0 800 850 900 950 1000 1050 1100 1150 1200 0 dbm +3 dbm -9 dbm frequency (mhz) output power (dbm), output ip3 (dbm) sideband suppression (dbc) output power sideband suppression output ip3 -20 -10 0 10 20 30 40 -60 -50 -40 -30 -20 -10 0 800 850 900 950 1000 1050 1100 1150 1200 4.5v 5.0v 5.5v frequency (mhz) output power (dbm), output ip3 (dbm) sideband suppression (dbc) output power sideband suppression output ip3 -70 -65 -60 -55 -50 -45 -40 -70 -65 -60 -55 -50 -45 -40 0.1 1 +25 c +85 c -40 c input baseband amplitude (vp-p diff) carrier feedthrough (dbm) sideband suppression (dbc) carrier feedthrough sideband suppression 2 3 -80 -75 -70 -65 -60 -55 -50 -45 -40 800 850 900 950 1000 1050 1100 1150 1200 0 dbm +3 dbm -9 dbm frequency (mhz) carrier feedthrough (dbm) uncalibrated calibrated -80 -75 -70 -65 -60 -55 -50 -45 -40 800 850 900 950 1000 1050 1100 1150 1200 4.5 v 5.0 v 5.5 v frequency (mhz) carrier feedthrough (dbm) uncalibrated calibrated [1] output matched to 1 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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 5 HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz o utput power, o utput i p3 & sideband suppression vs. freq. over t emperature [1] u ncalibrated & c alibrated c arrier feedthrough vs. freq. over t emperature [1] [1] output matched to 1950 mhz o utput power & o utput n oise @ 1950 mhz vs. v g a a ttenuation mhz over t emperature [1] c arrier feedthrough & sideband suppression @ 1950 mhz vs. v g a a ttenuation over t emperature [1] -20 -10 0 10 20 30 40 -60 -50 -40 -30 -20 -10 0 1800 1850 1900 1950 2000 2050 2100 2150 2200 +25 c +85 c -40 c frequency (mhz) output power (dbm), output ip3 (dbm) sideband suppression (dbc) output power sideband suppression output ip3 -40 -30 -20 -10 0 10 20 -180 -170 -160 -150 -140 -130 -120 0 4 8 12 16 20 24 28 32 +25 c +85 c -40 c attenuation (db) output power (dbm) output noise @20mhz (dbm/hz) output power output noise -20 -15 -10 -5 0 5 10 15 20 -160 -155 -150 -145 -140 0.1 1 +25 c +85 c -40 c output noise @ 20 mhz (dbm/hz) input baseband amplitude (vp-p diff) output power output noise output power (dbm) op1db 11.6 dbm op1db 10.9 dbm op1db 11.8 dbm 2 3 -80 -75 -70 -65 -60 -55 -50 -45 -40 1800 1850 1900 1950 2000 2050 2100 2150 2200 +25 c +85 c -40 c frequency (mhz) carrier feedthrough (dbm) uncalibrated calibrated -90 -85 -80 -75 -70 -65 -60 -55 -50 -60 -55 -50 -45 -40 0 4 8 12 16 20 24 28 32 +25 c +85 c -40 c attenuation (db) carrier feedthrough (dbm) sideband suppression (dbc) carrier feedthrough sideband suppression -70 -65 -60 -55 -50 -45 -40 -60 -55 -50 -45 -40 -35 -30 0.1 1 +25 c +85 c -40 c input baseband amplitude (vp-p diff) carrier feedthrough (dbm) sideband suppression (dbc) carrier feedthrough sideband suppression 2 3 o utput power & o utput n oise @ 1950 mhz vs. i nput b aseband a mplitude over t emperature [1] c arrier feedthrough & sideband suppression @ 1950 mhz vs. i nput b aseband a mplitude over t emperature [1]
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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 6 HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz [1] output matched to 1950 mhz [2] output matched to 2690 mhz o utput power, o utput i p3 & sideband suppression vs. freq. over lo power [1] o utput power, o utput i p3 & sideband sup - pression vs. freq. over supply v oltage [1] u ncalibrated & c alibrated c arrier feedthrough vs. freq. over lo power [1] u ncalibrated & c alibrated c arrier feed- through vs. freq. over supply v oltage [1] o utput power, o utput i p3 & sideband suppression vs. freq. over t emperature [2] u ncalibrated & c alibrated c arrier feedthrough vs. freq. over t emperature [2] -20 -10 0 10 20 30 40 -60 -50 -40 -30 -20 -10 0 1800 1850 1900 1950 2000 2050 2100 2150 2200 0 dbm +3 dbm -9 dbm frequency (mhz) output power (dbm), output ip3 (dbm) sideband suppression (dbc) output power sideband suppression output ip3 -20 -10 0 10 20 30 40 -60 -50 -40 -30 -20 -10 0 1800 1850 1900 1950 2000 2050 2100 2150 2200 4.5v 5.0v 5.5v frequency (mhz) output power (dbm), output ip3 (dbm) sideband suppression (dbc) output power sideband suppression output ip3 -40 -30 -20 -10 0 10 20 30 40 -70 -60 -50 -40 -30 -20 -10 0 10 2500 2550 2600 2650 2700 2750 2800 +25 c +85 c -40 c frequency (mhz) power (dbm) & ip3 (dbm) sideband suppression (dbc) output power sideband suppression output ip3 -80 -75 -70 -65 -60 -55 -50 -45 -40 1800 1850 1900 1950 2000 2050 2100 2150 2200 0 dbm +3 dbm -9 dbm frequency (mhz) carrier feedthrough (dbm) uncalibrated calibrated -80 -75 -70 -65 -60 -55 -50 -45 -40 1800 1850 1900 1950 2000 2050 2100 2150 2200 4.5 v 5.0 v 5.5 v frequency (mhz) carrier feedthrough (dbm) uncalibrated calibrated -60 -55 -50 -45 -40 -35 -30 2500 2550 2600 2650 2700 2750 2800 +25 c +85 c -40 c frequency (mhz) carrier feedthrough (dbm) uncalibrated calibrated
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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 7 [1] output matched to 2960 mhz o utput power & o utput n oise @ 2690 mhz vs. v g a a ttenuation over t emperature [1] c arrier feedthrough & sideband suppression @ 2960 mhz vs. v g a a ttenuation over t emperature [1] o utput power & o utput n oise @ 2960 mhz vs. i nput b aseband a mplitude over t emperature [1] c arrier feedthrough & sideband suppression @ 2960 mhz vs. i nput b ase - band a mplitude over t emperature [1] o utput power, o utput i p3 & sideband suppression vs. freq. over lo power [1] u ncalibrated & c alibrated c arrier feedthrough vs. freq. over lo power [1] HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz -40 -30 -20 -10 0 10 20 -180 -170 -160 -150 -140 -130 -120 0 4 8 12 16 20 24 28 32 +25c +85c -40c output noise @ 20 mhz (dbm/hz) attenuation (db) output power output noise output power (dbm) -20 -10 0 10 20 -155 -150 -145 -140 -135 0.1 1 +25 c +85 c -40 c output noise @ 20 mhz (dbm/hz) input baseband amplitude (vp-p diff) output power output noise output power (dbm) op1db 11.9 dbm op1db 12.3 dbm op1db 11.1 dbm 2 3 -20 -10 0 10 20 30 40 -60 -50 -40 -30 -20 -10 0 2500 2550 2600 2650 2700 2750 2800 0 dbm +3 dbm -9 dbm frequency (mhz) output power (dbm), output ip3 (dbm) sideband suppression (dbc) output power sideband suppression output ip3 -80 -70 -60 -50 -40 -30 -20 -10 -100 -90 -80 -70 -60 -50 -40 -30 0 4 8 12 16 20 24 28 32 +25 c +85 c -40 c attenuation (db) carrier feedthrough (dbm) sideband suppression (dbc) carrier feedthrough sideband suppression -70 -60 -50 -40 -30 -60 -50 -40 -30 -20 0.1 1 +25 c +85 c -40 c input baseband amplitude (vp-p diff) carrier feedthrough (dbm) sideband suppression (dbc) carrier feedthrough sideband suppression 2 3 -60 -55 -50 -45 -40 -35 -30 2500 2550 2600 2650 2700 2750 2800 0 dbm +3 dbm -9 dbm frequency (mhz) carrier feedthrough (dbm) uncalibrated calibrated
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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 8 o utput power, o utput i p3 & sideband sup - pression vs. freq. over supply v oltage [1] n ormalized a ttenuation vs. frequency (only major states are shown) a bsolute e rror [2] vs. a ttenuation state u ncalibrated & c alibrated c arrier feed- through vs. freq. over supply v oltage [1] a bsolute e rror [2] vs. frequency (only major states are shown) step e rror [3] vs. frequency (only major states are shown) [1] output matched to 2960 mhz [2] absolute error - difference between measured and ideal attenuation [3] s tep error - difference between measured attuation step and ideal step of 0.5 db HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz -20 -10 0 10 20 30 40 -60 -50 -40 -30 -20 -10 0 2500 2550 2600 2650 2700 2750 2800 4.5v 5.0v 5.5v frequency (mhz) power (dbm) & ip3 (dbm) sideband suppression (dbc) output power sideband suppression output ip3 -35 -30 -25 -20 -15 -10 -5 0 0 0.5 1 1.5 2 2.5 frequency (ghz) normalized attenuation (db) -0.5 -0.25 0 0.25 0.5 0 4 8 12 16 20 24 28 32 attenuation (db) absolute error (db) 50 mhz 1 ghz 2 ghz 2.5 ghz -60 -55 -50 -45 -40 -35 -30 2500 2550 2600 2650 2700 2750 2800 4.5 v 5.0 v 5.5 v frequency (mhz) carrier feedthrough (dbm) uncalibrated calibrated -1 -0.5 0 0.5 1 0 0.5 1 1.5 2 2.5 frequency (ghz) absolute error (db) -0.5 -0.25 0 0.25 0.5 0 0.5 1 1.5 2 2.5 frequency (ghz) step error (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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 9 step e rror vs. a ttenuation lo r eturn l oss vs. frequency ac p r for w- cd m a @ 2140 mhz vs. o utput power for v arious i nput l evels, v g a a ttenuation 0 d b [1] ac p r for w- cd m a @ 2140 mhz vs. o utput power & v g a a ttenuation for v arious i nput l evels [1] rf r eturn l oss vs. a ttenuation rf r eturn l oss vs. frequency o ffset, v g a a ttenuation 0 d b HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz -0.15 -0.1 -0.05 0 0.05 0.1 0.15 0 4 8 12 16 20 24 28 32 attenuation (db) step error (db) 50 mhz, 1 ghz, 2 ghz, 2.5 ghz -40 -30 -20 -10 0 0 1 2 3 4 5 frequency (ghz) return loss (db) single-ended lo differential lo with bd2326 balun -75 -70 -65 -60 -55 -50 -15 -10 -5 0 carrier output power (dbm) acpr (dbc) adjacent ch. acpr alternate ch. acpr -30 -25 -20 -15 -10 -5 0 0 4 8 12 16 20 24 28 32 attenuation state (db) rf return loss (db) 1000mhz 2690mhz 1950 mhz -30 -25 -20 -15 -10 -5 0 -150 -100 -50 0 50 100 150 offset frequency (mhz) 1000mhz return loss (db) 1950mhz 2690mhz -90 -80 -70 -60 -50 -40 -30 -180 -160 -140 -120 -100 -80 -60 -40 -30 -20 -10 0 10 output noise @ 20 mhz (dbm/hz) carrier output power (dbm) acpr output noise acpr (db) 110mv (rms) 65mv (rms) 0 db 0 db 0 db 31.5db 31.5db 0 db 28db 37mv (rms) [1] w-c d ma (modulation s et-up for acpr mode): t he baseband i and q input signals were generated using t est model 1 with 64 channels
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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 10 a bsolute maximum r atings t ruth t able vccm i x, vccbg, vccrf, vcc d ac -0.3v to +5.5v v dd 3 -0.3v to +3.6v l o i nput power +18 dbm baseband i nput voltage ( d c) 0v to +1.4v baseband i nput voltage (ac + d c) 0v to +1.8v maximum junction t emperature 125 c continuous pdiss ( t = 85 c) (derate 25 mw/ c above 85 c) 1w t hermal resistance (r th ) (junction to ground paddle) 40 c/w s torage t emperature -65 to +150 c operating t emperature -40 to +85 c refow s oldering peak t emperature 260 c esd s ensitivity (hbm) class 1b control voltage i nput attenuation agc5 agc4 agc3 agc2 agc1 agc1 l ow l ow l ow l ow l ow l ow 0 db l ow l ow l ow l ow l ow high 0.5 db l ow l ow l ow l ow high l ow 1 db l ow l ow l ow high l ow l ow 2 db l ow l ow high l ow l ow l ow 4 db l ow high l ow l ow l ow l ow 8 db high l ow l ow l ow l ow l ow 16 db high high high high high high 31.5 db any combination of the above states will provide an increase in the attenuation approximately equal to the sum of the bits selected ele c t ro st a ti c se n siti v e de v ic e ob se rv e han dli ng pr e ca uti on s s tresses above those listed under absolute maximum ratings may cause permanent damage to the device. t his is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specifcation is not implied. e xposure to absolute maximum rating conditions for extended periods may affect device reliability. o utline d rawing no tes : 1. le a d fram e ma te r i a l : copp e r a ll oy 2. di m e n si on s ar e i n i nch es [m illi m ete r s ] 3. le a d s pac i ng to le ranc e is non-c u m ul a ti v e . 4. pa d b u rr le ng t h s ha ll b e 0.15mm max i m u m. pa d b u rr h ei gh t s ha ll b e 0.05mm max i m u m. 5. packag e warp s ha ll no t e xc eed 0.05mm. 6. a ll gro u n d le a ds an d gro u n d pa ddle m ust b e s o lde r ed t o pcb rf gro u n d . 7. r e f e r to h ittite app li ca ti on no te for su gg ested l an d pa tte rn. part number package body material l ead finish m sl rating package marking [1] hmc795 l p5 e roh s -compliant l ow s tress i njection molded plastic 100% matte s n m sl 1 [2] h795 xxxx [1] 4- d igit lot number xxxx [2] max peak refow temperature of 260 c package i nformation HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz
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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 11 pin number function d escription i nterface s chematic 1 rstb d igital reset input, active low 2 vccrf s upply voltage for the output driver, 5v, 24ma @ max gain, 0.7ma @ min gain 3, 6, 19, 22 gn d t hese pins and the ground paddle should be connected to a high quality rf/ d c ground. 4, 5 rfn, rfp d ifferential rf open collector output, needs pull up inductor to vccrf and d c coupling capacitor on both pins, 5v, 0.5ma @min gain, 24.4ma @ max gain 7, 8, 9, 10, 11, 12 agc0, agc1, agc2, agc3, agc4, agc5 parallel binary input gain control word 13 vcc d ac s upply voltage for the d ac, 3.9ma @ 5v 14, 15 q p, q n q channel differential baseband input. t hese high impedance ports should be biased at 1.3v. nominal recommended baseband input is 1.4v pp differential 16, 25 vccm i x s upply voltage for the i / q mixers, 31.7ma @ 5v 17 n/c t he pins are not connected internally; however, all data shown herein was measured with these pins connected to rf/ d c ground externally. 18 vcc l o s upply voltage for the l o chain, 65.2ma @ 5v pin d escriptions HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz
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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 12 pin d escriptions (continued) pin number function d escription i nterface s chematic 20, 21 l op, l on l o inputs. need d c decoupling capacitors. t he ports could be driven single ended or differentially 23 vccbg s upply voltage for the bandgap, 4.3ma @ 5v 24 de co u p le e xternal bypass decoupling for precision bias circuits, 3.80v no te : b i a s ref voltage cannot drive an external load. must be measured with 10gohm meter such as agilent 34410a, normal 10mohm d vm will read erroneously. 26, 27 i n, i p i channel differential baseband input. t hese high impedance ports should be biased at 1.3v. nominal recommended baseband input is 1.4v pp differential 28 v dd 3 s upply voltage for the digital 29 sd o main s erial port data output 30 sdi main s erial port data input 31 se n main s erial port latch enable input 32 s ck main s erial port clock input HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz
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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 13 e valuation p cb t he circuit board used in the application should use rf circuit design techniques. s ignal lines should have 50 ohm impedance while the package ground leads and exposed paddle should be connected 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. HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz
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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 14 i tem d escription j1, j10 2 pin d c connector j2, j3, j5 - j8 pcb mount s ma connector j4 12 pin d c connector j9 12 pin s ocket connector c1, c4, c8, c10, c14, c15, c18, c20, c23, c34, c35, c38 1 f capacitor, 0402 pkg c2 10 f capacitor, 1206 pkg c3, c5, c6, c11, c12 4.7 f capacitor, 0805 pkg c7, c16, c17, c22, c24, c25, c28, c33, c36, c37, c40 1 nf capacitor, 0402 pkg c9, c21 10 nf capacitor, 0402 pkg c13 1.2 nf capacitor, 0402 pkg c19, c27, c32, c41 100 pf capacitor, 0402 pkg c26, c30 - c31, c39, c42 d o not populate r1, r4, r21, r24, r27, r30 - r32 100 kohm resistor, 0402 pkg r2, r3, r5, r6 0 ohm resistor, 0402 pkg l ist of materials for e valuation p cb [1] HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz i tem d escription r7 10 kohm resistor, 0402 pkg r8, r9, r12 - r20, r22, r23, r25, r26, r28, r29 d o not populate r10 4 kohm resistor, 0402 pkg r11 1 kohm resistor, 0402 pkg t 1, t 2 rf t ransformer t p1 - t p3 d c pin fb1 - fb3 1 kohms ferrite bead, 0805 pkg l 1, l 3 10 nh i nductor, 0402 pkg l 2, l 6 4.7 nh i nductor, 0402 pkg u 1 l inear regulator, 3.3v u 2 l inear regulator, 5v u 3 hmc795 l p5 e modulator pcb [2] 125087 e val board [1] when requesting an evaluation board, please reference the appropriate pcb number listed in the table components for the s elected frequencies [2] circuit board material: arlon 25fr / fr4 t uned frequency 850 mhz 1950 mhz 2960 mhz e valuation board number 127433 125370 130190 e valuation kit number [1] 129934 129935 130186 l 2, l 6 47 nh 4.7 nh 1.8 nh l 1, l 3 27 nh 10 nh 5.6 nh r29 2.5 kohms de pop de pop t 1 t cn2-14 t cn2-26 t cn2-26 [1] e valuation kit includes evaluation board, us b controller board, us b cable and evaluation software. t able 9. c omponents for selected frequencies
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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 15 a pplication & e valuation p cb schematic HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz
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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 16 theory of operation t he hmc795 l p5 e modulator consists of the following functional blocks 1. l o i nterface 2. i / q modulator 3. d igitally controlled variable gain amplifer 4. gain control d ac 5. bias circuit 6. s erial port interface lo i nterface t he l o interface consists of a gain stage followed by a divide by 2 stage that generates two carrier signals in quad- rature which are used to drive the mixers. as a result, the l o path is immune to large variations in the l o signal level and the modulator performance does not vary much with l o power. d ue to the on chip divider, the input l o frequency must be twice that of the desired carrier frequency. t his offers the advantage of signifcantly lowering carrier feedthrough. t he l o port can be driven differentially or single ended if the unused side is ac grounded. however, when driven single-endedly, the carrier feedthrough and sideband rejection can be degraded by either large 2nd order l o tones, such as when driven by a vco with a divider output, or, by large half-harmonic tones, such as when driven by a vco with a doubler output. t he l o interface can be enabled/disabled separately through the serial port interface using reg01h <0> and can be used to disable the modulator output. t he rf output signal is suppressed by 100 db when only the l o interface is disable and the l o signal itself is suppressed approximately 60 db. i n addition, the l o buffer bias can be increased using reg02h <7>. t his setting is recommended for l o frequencies above 5 ghz. i /q modulator t he hmc795 l p5 e has two double-balanced mixers, one for the in-phase channel and one for the quadrature chan- nel. t he differential baseband inputs ( q p, q n, i p, and i n) consist of the bases of npn transistors, which present a high impedance. t he d c common mode voltage at the baseband inputs sets the currents in the two mixer cores. varying the baseband common mode voltage varies the current in the mixers and affects the overall modulators performance. t he recommended d c voltage for the baseband common mode voltage is 1.3v d c, 0.1v. t he output of the two mixers are summed together differentially and then used to drive the differential input of the vga stage. t he mixer can be enabled/disabled with reg01h <1>. t he external baseband d c bias also need to be disabled to completely disable the mixers. d isabling the mixer enables a weak pull down at the mixer inputs which connects the mixer inputs through a resistive path to ground. t his may pull the external input low resulting in large current fow if the external bias is not disabled. HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz
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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 17 d igitally c ontrolled v ariable gain a mplifer t he output of the hmc795 l p5 e is a 6 bit, digitally controlled, variable gain amplifer that can provide very accurate linear- in-db gain control over a 31.5 db range in 0.5 db steps. t he vga also provides relatively constant phase over the entire gain range, as shown in figure 1. an 11 bit d ac is used to control the vga. s ee the gain control d ac section for more detail about gain control. figure 1. vga s21 magnitude and phase @ 2 ghz vs attenuation -30 -25 -20 -15 -10 -5 0 5 10 -130 -120 -110 -100 -90 -80 -70 -60 -50 0 4 8 12 16 20 24 28 32 attenuation (db) s21 magnitude (db) s21 phase (deg) phase magnitude for maximum performance and fexibility, the output ports of the vga are differential open collectors that require pull up inductors to the positive supply and external matching components. t he evaluation board allows for several options for matching. s ee the output matching section for more details. t he vga can be enabled/disabled separately through the s p i using reg01h <2>. t he on/off isolation of the vga is greater than 60 db for rf output frequencies up to 2.5 ghz. gain c ontrol dac an 11 bit d ac is used to control the vga for linear-in-db gain control, figure 2 shows the control for the d ac.. t he d ac is normally controlled by a look up table ( lut ) that is in turn, controlled by the 6 bit parallel port. t he values of the look up table are fxed to give 0.5 db steps over a 31.5 db gain range. figure 2. simplifed dac control diagram for increased fexibility, there are three methods to control the d ac and vga gain. 1. parallel mode u se the 6 bit parallel port to provide fxed 0.5 db gain steps. i n this mode the d ac is controlled by a look up table with 64 states that map the 6 bit parallel port to fxed 11-bit gain words for each state. t he values of the lut are fxed to give nominally 0.5 db attenuation steps over a 31.5 db gain range. HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz
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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 18 2. correction mode u se the s p i port in conjunction with the 6 bit parallel port to apply a 4 bit, 2s complement, correction factor to any attenuation step. t his option can be used to compensate the gain control for systematic variations in the transmit chain by adding negative or positive correction factors to any of the fxed lut values to either slightly increase or decrease the gain step for that particulate state. t his mode requires the host controller to write the desired corrections to the s p i after the chip is powered up. t he correction factors are then applied to the desired gain steps when ever the parallel port gain control changes, until the chip is powered down. t he 4 bit, 2s compliment, correction factor for each line in the lut are set by reg4h to reg13h. t he correction factor for 0 db attenuation (line 0) is set in reg4h <3:0>, 0.5 db (line 1) is set by reg4h <7:4>, 1.0 db (line 2) by reg4h<11:8> and so on until reg13h <15:12> which sets the correc- tion factor for 31.5 db attenuation. i f more adjustment is needed, the lut correction values can be increased by a factor of 2, 3, or 4 times by using reg2h <15:8>. reg2h <9:8> sets the multiplication factor for the frst quadrant of the lut , lines 0 to 15, <11:10> for lines 16 to 31, <13:12> for lines 32 to 47 and <15:14> for the last quadrant, lines 48 to 63. t he correction in db can be estimated by cor(db) = 10 log10 1 + [( ) -1 ] (corword mult) lutword where mult is the correction multiplication factor, and corword and lut word are the decimal equivalent of the binary correction and lut word. an expression for determining the lut word is given in the bypass mode section below. figures 3, 4 and 5 show the range of correction in db for 4 db, 16 db and 31.5 db attenuation and figure 6 shows the output power versus attenuation for no correction, maximum positive and maximum negative correction applied to all states in the lut . t he lut value for 0 db attenuation can only be decreased since it already at maximum. i ncreasing the word value will cause an overfow resulting in maximum attenuation instead. figure 3. attenuation change from 4 db attenuation vs. lut correction word over different multiplication factors figure 4. attenuation change from 16 db attenuation vs. lut correction word over different multiplication factors -0.3 -0.2 -0.1 0 0.1 0.2 0.3 -8 -6 -4 -2 0 2 4 6 8 lut correction word attenuation change (db) x1 x4 x3 x2 -1 -0.5 0 0.5 1 -8 -6 -4 -2 0 2 4 6 8 lut correction word attenuation change (db) x1 x4 x3 x2 HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz
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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 19 HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz figure 5. attenuation change from 31.5 db attenuation vs. lut correction word over different multiplication factors figure 6. output power @ 850 mhz vs. vga attenuation for no correction, maximum positive & maximum negative correction values -8 -6 -4 -2 0 2 4 6 8 -8 -6 -4 -2 0 2 4 6 8 lut correction word attenuation change (db) x1 x4 x3 x2 -30 -25 -20 -15 -10 -5 0 5 10 0 4 8 12 16 20 24 28 32 attenuation (db) output power (dbm) max +ve correction max -ve correction 3. bypass mode . u se the s p i port to bypass the parallel port and lut completely. i n this mode reg2h<4> is set to enable the bypass mode. t he host controller can then write the desired gain word to the s p i using reg3h<10:0> for each and every desired gain change. t he input word can be determined from the desired gain (in db) by lutword (10:0) = dec2bin[round[(2 11 - 1) 10 (-attn)/ 20 ]] and is plotted in figure 7. i n the this mode it is possible to use much lower attenuation steps over a reduced gain control range. t he limit for reliable attenuation steps is 0.1 db with a gain control range of approximately 22 db. 0 4 8 12 16 20 24 28 32 0 500 1000 1500 2000 lut word attenuation (db) figure 7. attenuation vs. lut word t he d ac can be enabled/disabled separately through the serial port interface using bit 3 of register 01h. d isabling the d ac will also disable the vga.
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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 20 HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz b ias c ircuit a band gap reference circuit generates the reference currents used by the different sections. t he bias circuit can be disabled with reg01h <4>. d isabling the bias circuit will also disable the reference currents to all the other sections except the mixers, since they use an external bias. an external pin, pin 24, is also provided to allow for external decoupling for low noise performance, 100nf is recommended. power on r eset and soft r eset t he hmc795 l p5 e features a hardware power on reset (por). all chip registers will be reset to default states approximately 250 us after power up. t he s p i registers may also be hardware reset by holding r st b, pin 1, low, or software reset by writing 80h to reg00h followed by writing 00h to reg00h. serial port i nterface t he hmc795 l p5 e features a four wire serial port for simple communication with the host controller. register types may be read only, write only, or read/write, as described in the registers descriptions. t ypical serial port operation can be run with s ck at speeds up to 50 mhz. t he hmc795 l p5 e chip address is fxed as 4d or 100b. serial port write operation a typical wr ite cycle is shown in figure 8. i t is 40 clock cycles long. 1. t he host both asserts se n (active low s erial port e nable) and places the m s b of the data on sdi followed by a rising edge on s c l k. 2. hmc795 l p5 e reads sdi on the 1st rising edge of s c l k after se n. 3. hmc795 l p5 e registers the data bits in the next 29 rising edges of s c l k. 4. host places the seven register address bits on the next seven falling edges of s c l k, m s b frst. 5. hmc795 l p5 e registers the register address bits in the next seven rising edges of s c l k. 6. host places the 3 chip address bits <100> on the next 3 falling edges of s c l k, m s b frst. 7. hmc795 l p5 e registers the chip address bits in the next 3 rising edges of s c l k. 8. se n is de-asserted on the 40th falling edge of s c l k. t his completes the wr ite cycle. 9. hmc795 l p5 e also exports data back on the sd o line. for details see the section on r e a d operation. t he host changes the data on the falling edge of s c l k and the hmc795 l p5 e reads the data on the rising edge. serial port read operation t he s p i can read from the internal registers in the chip. t he data is available on sd o line. t his line itself is tri-stated after power up. after a wr ite cycle, the hmc795 l p5 e controls the sd o line and exports data on this line during the current wr ite cycle. t he hmc795 l p5 e chip address is fxed as 4d or 100b a r e a d operation is always preceded by a wr ite operation to register 0 to defne the register to be queried. e very r e a d cycle is also a wr ite cycle in that data sent to the s p i while reading the data will also be stored by the hmc795 l p5 e when se n goes high. i f this is not desired then it is suggested to write to register 0 during the r e a d operation as the status of the device will be unaffected. a typical r e a d cycle is also shown in figure 8. a read cycle is 40 clock cycles long. t o specifcally read a register, the address of that register must be written in the register 0. a read cycle can then be initiated as follows; 1. t he host asserts se n (active low s erial port e nable) followed by a rising edge s c l k. 2. hmc795 l p5 e reads sdi (the m s b) on the 1st rising edge of s ck after se n.
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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 21 HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz 3. hmc795 l p5 e registers the data bits in the next 29 rising edges of s c l k (total of 30 data bits). t he ls bs of the data bits represent the address of the register that is intended to be read. 4. host places the 7 register address bits on the next 7 falling edges of s c l k (m s b to ls b) while the hmc795 l p5 e reads the address bits on the corresponding rising edge of s ck. for a read operation this is 0000000. 5. host places the 3 chip address bits <100> on the next 3 falling edges of s ck (m s b to ls b). note the hmc795 l p5 e chip address is fxed as 4d or 100b. 6. se n goes from low to high after the 40th rising edge of s ck. t his completes the frst portion of the r e a d cycle. 7. t he host asserts se n (active low s erial port e nable) followed by a rising edge s c l k. 8. hmc795 l p5 e places the 30 data bits, 7 address bits, and 3 chip id bits on the sd o on each rising edge of the s ck commencing with the frst rising edge beginning with m s b. 9. t he host de-asserts se n (i.e. sets se n high) after reading the 40 bits from the sd o output. t he 32 bits consists of 30 data bits, 7 address bits, and the 3 chip id bits. t his completes the r e a d cycle. figure 8. spi timing diagram for write and read operation main sp i t iming c haracteristics dvdd = +3.3v 10%, gnd = 0v parameter conditions min. typ. max units t 1 se n to s ck setup time 8 nsec t 2 sdi to s ck setup time 8 nsec t 3 sdi to c l k hold time 8 nsec t 4 s ck high duration 8 nsec t 5 s ck low duration 8 nsec t 6 se n low duration after 40th c l k 20 nsec t 7 se n high duration 20 nsec
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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 22 HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz o utput matching t he output ports of the vga are differential open collectors that require pull up inductors to the positive supply and external matching components. t he evaluation board uses a 2:1 impedance transformer to convert the differential output to single ended for evaluation purposes. t hree options are available for the evaluation board, each with different matching components, one for 850 mhz, one for 1950 mhz, and another for 2690 mhz. when requesting an evaluation board, please reference the appropriate pcb number listed in the table components for the s elected frequencies t here are a number of ways to match the rf output of the hmc795 l p5 e for optimum performance. t he most basic method is to use a 50 resistor to vcc and a 1 nf dc bypass capacitor connected in series as shown figure 9(a). t his option provides a good broadband match, see figure 10, but limits the maximum output power, compared to a narrow band match, see figure 11. s ingle-ended operation is possible by using a transformer, which can limit the bandwidth, as seen in the output power plot, or by using only one side of the differential output. however, biasing for the unused side is still required. for best performance it is recommended to terminate the unused side with the same matching and load impedance as the used side, see figure 9(b). output power is generally reduced by 2 to 3 db for single- ended operation, as shown in figure 11. figure 9. simple output matching network -40 -35 -30 -25 -20 -15 -10 -5 0 0 500 1000 1500 2000 2500 3000 frequency (mhz) return loss (db) narrow band differential wide band single ended wide band differential [1] wide band differential [2] -10 -5 0 5 10 0 500 1000 1500 2000 2500 3000 3500 frequency (mhz) output power (dbm) narrow band differential wide band single ended wide band differential [1] wide band differential [2] figure 10. output return loss for various matching options [1] with t cn2-14 t ransformer [2] with t cn2-26 t ransformer figure 11. output power for various matching options [1] with t cn2-14 t ransformer [2] with t cn2-26 t ransformer a narrow band solution, with higher output power, is possible by using a simple l -match network, as shown in figure 12. a shunt resistor is included to control the q of the matching network and sets the output power of the hmc795 l p5 e . consequently a low value resistor will result in a broadband match but lower output power than a high value resistor. t he table below provides recommend component values for various output frequencies with a bandwidth of approximately 5-10%. i t is also possible to use an l c matching network where l 2 is removed and the d c blocking capacitor is used as a matching component. e xperiments show that the output power is reduced approximately 1 -2 db though and that values for the capacitors become unrealistic (< 500 ff) above 2 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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 23 HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz figure 12. simple output matching network r ecommending matching c omponents 450 mhz 850 mhz 1450 mhz 1850 mhz 1950 mhz 2400 mhz 2500 mhz 2690 l 1 270 nh 47 nh 12 nh 5.6 nh 4.7 nh 2.7 nh 2.2 nh 1.8 nh l 2 82 nh 27 nh 12 nh 12 nh 10 nh 6.8 nh 5.6 nh 5.6 nh r1 - 2.4k 2.4k - - - - - t 1 bypassed t cn2-14 t cn2-14 t cn2-26 t cn2-26 t cn2-26 t cn2-26 t cn2-26 dac modulator i nterface n etwork t he hmc795 l p5 e is capable of interfacing with a variety of popular d /a convertors. most d ac have differential outputs with a source or sink current of 0 ma to 20 ma. however, most d acs require a different output compliance voltage than that of the d c input bias level for the hmc795 l p5 e . a passive interface network can be used to transform the common-mode voltage of the d ac to the desired d c input bias of the modulator of 1.3v. figures 13 and 14 show the interface network for two different topologies. 1. t opology 1. d ac vcm > hmc795 l p5 e vcm. t his topology is used shift the d ac output common mode voltage down to the required d c level at the modulator input. 2. t opology 2. d ac vcm < hmc795 l p5 e vcm. t his topology is used shift the d ac output common mode voltage up to the required d c level at the modulator input. t he resistive level-shifting network is not frequency sensitive but the resistive divider network inherent in the network attenuates the baseband signal. t he bypass capacitors shown figures 13 and 14 will eliminate the attenuation for frequencies greater than 3 khz. e ither topology can be used on the hmc795 l p5 e evaluation board. figure 13. dac interface network topology 1
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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 24 HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz figure 14. dac interface network topology 2 dac i nterface n etwork v alues topology 1 topology 2 d ac vcm 3.3 0.5 r1 62 36 r2 130 200 r3 82 910 register map r eg 01h - e nable / c ontrol r egister bit name width default description [0] en l o 1 1 enables l o path [1] enmix 1 1 enables mixer l o bias - see i / q modulator section for more detail [2] en d rvr 1 1 enables output driver [3] en d ac 1 1 enables gain control d ac [4] enbias 1 1 enables bandgap and bias r eg 02h - function r egister bit name width default description [1:0} reserved 2 00 reserved [3:2] reserved 2 00 reserved [4] lut bypass 1 0 allows direct control of the gain control d ac via the d ac word in reg03 [6:5] reserved 2 00 reserved [7] l o buffer bias 1 0 i ncreases the l o buffer bias current by approximately 7.5ma [9:8] mult_0 2 00 multiplication factor for correction to attenuation settings 0 to 7.5db 00: x1 (default) 01: x2 10: x3 11: x4
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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 25 HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz r eg 02h - function r egister bit name width default description [11:10] mult_1 2 00 multiplication factor for lines 16 - 31 of lut (2nd q uadrant) 00: x1 (nom) 01: x2 10: x3 11: x4 [13:12] mult_2 2 00 multiplication factor for correction to attenuation settings 16 to 23.5db 00: x1 (default) 01: x2 10: x3 11: x4 [15:13] mult_3 2 00 multiplication factor for correction to attenuation settings 24 - 31.5db 00: x1 (default) 01: x2 10: x3 11: x4 [17:16] reserved 2 00 reserved [21:18] reserved 4 0000 reserved r eg 03h - gain c ontrol bit name width default description [10:0] idac 11 000h gain control d ac input word. lut bypass bit in register 2h must be enabled. gain control d ac word consists of an 11bit input word where 7ffh is maximum gain and 36h corresponds to minimum gain. neglecting d ac error, the input word can be determined from the desired gain (in db) as follows: idac<10:0>=dec2bin(round((2^(11) 1)*10^(gain/20))) r eg 04h - lut c orrection 0 - 3 lut correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. multiplication factor for lut lines 0 -15 (attenuation 0 to 7.5 db) is set in reg2 by bits mult_0 [9:8] bit name width default description [3:0] lut _0 4 0000 2s complement 4bit correction to lut line 0 (attenuation 0 db) [7:4] lut _1 4 0000 2s complement 4-bit correction to lut line 1 (attenuation 0.5 db) [11:8] lut _2 4 0000 2s complement 4-bit correction to lut line 2 (attenuation 1 db) [15:12] lut _3 4 0000 2s complement 4-bit correction to lut line 3 (attenuation 1.5 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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 26 HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz r eg 05h - lut c orrection 4 - 7 lut correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. multiplication factor for lut lines 0 -15 (attenuation 0 to 7.5 db) is set in reg2 by bits mult_0 [9:8] bit name width default description [3:0] lut _4 4 0000 2s complement 4-bit correction to lut line 4 (attenuation 2 db) [7:4] lut _5 4 0000 2s complement 4-bit correction to lut line 5 (attenuation 2.5 db) [11:8] lut _6 4 0000 2s complement 4-bit correction to lut line 6 (attenuation 3 db) [15:12] lut _7 4 0000 2s complement 4-bit correction to lut line 7 (attenuation 3.5 db) r eg 06h - lut c orrection 8 - 11 lut correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. multiplication factor for lut lines 0 -15 (attenuation 0 to 7.5 db) is set in reg2 by bits mult_0 [9:8] bit name width default description [3:0] lut _8 4 0000 2s complement 4-bit correction to lut line 8 (attenuation 4 db) [7:4] lut _9 4 0000 2s complement 4-bit correction to lut line 9 (attenuation 4.5 db) [11:8] lut _10 4 0000 2s complement 4-bit correction to lut line 10 (attenuation 5 db) [15:12] lut _11 4 0000 2s complement 4-bit correction to lut line 11 (attenuation 5.5 db) r eg 07h - lut c orrection 12 - 15 lut correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. multiplication factor for lut lines 0 -15 (attenuation 0 to 7.5 db) is set in reg2 by bits mult_0 [9:8] bit name width default description [3:0] lut _12 4 0000 2s complement 4-bit correction to lut line 12 (attenuation 6 db) [7:4] lut _13 4 0000 2s complement 4-bit correction to lut line 13 (attenuation 6.5 db) [11:8] lut _14 4 0000 2s complement 4-bit correction to lut line 14 (attenuation 7 db) [15:12] lut _15 4 0000 2s complement 4-bit correction to lut line 15 (attenuation 7.5 db) r eg 08h - lut c orrection 16 - 19 lut correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. multiplication factor for lut lines 16 - 31 (attenuation 8 to 15.5 db) is set in reg2 by bits mult_0 [11:10] bit name width default description [3:0] lut _16 4 0000 2s complement 4-bit correction to lut line 16 (attenuation 8 db) [7:4] lut _17 4 0000 2s complement 4-bit correction to lut line 17 (attenuation 8.5 db) [11:8] lut _18 4 0000 2s complement 4-bit correction to lut line 18 (attenuation 9 db) [15:12] lut _19 4 0000 2s complement 4-bit correction to lut line 19 (attenuation 9.5 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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 27 HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz r eg 09h - lut c orrection 20 - 23 lut correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. multiplication factor for lut lines 16 - 31 (attenuation 8 to 15.5 db) is set in reg2 by bits mult_0 [11:10] bit name width default description [3:0] lut _20 4 0000 2s complement 4-bit correction to lut line 20 (attenuation 10 db) [7:4] lut _21 4 0000 2s complement 4-bit correction to lut line 21 (attenuation 10.5 db) [11:8] lut _22 4 0000 2s complement 4-bit correction to lut line 22 (attenuation 11 db) [15:12] lut _23 4 0000 2s complement 4-bit correction to lut line 23 (attenuation 11.5 db) r eg 0 a h - lut c orrection 24 - 27 lut correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. multiplication factor for lut lines 16 - 31 (attenuation 8 to 15.5 db) is set in reg2 by bits mult_0 [11:10] bit name width default description [3:0] lut _24 4 0000 2s complement 4-bit correction to lut line 24 (attenuation 12 db) [7:4] lut _25 4 0000 2s complement 4-bit correction to lut line 25 (attenuation 12.5 db) [11:8] lut _26 4 0000 2s complement 4-bit correction to lut line 26 (attenuation 13 db) [15:12] lut _27 4 0000 2s complement 4-bit correction to lut line 27 (attenuation 13.5 db) r eg 0 b h - lut c orrection 28 - 31 lut correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. multiplication factor for lut lines 16 - 31 (attenuation 8 to 15.5 db) is set in reg2 by bits mult_0 [11:10] bit name width default description [3:0] lut _28 4 0000 2s complement 4-bit correction to lut line 28 (attenuation 14 db) [7:4] lut _29 4 0000 2s complement 4-bit correction to lut line 29 (attenuation 14.5 db) [11:8] lut _30 4 0000 2s complement 4-bit correction to lut line 30 (attenuation 15 db) [15:12] lut _31 4 0000 2s complement 4-bit correction to lut line 31 (attenuation 15.5 db) r eg 0 c h - lut c orrection 32 - 35 lut correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. multiplication factor for lut lines 32 - 47 (attenuation 15 to 23.5 db) is set in reg2 by bits mult_0 [13:12] bit name width default description [3:0] lut _32 4 0000 2s complement 4-bit correction to lut line 32 (attenuation 16 db) [7:4] lut _33 4 0000 2s complement 4-bit correction to lut line 33 (attenuation 16.5 db) [11:8] lut _34 4 0000 2s complement 4-bit correction to lut line 34 (attenuation 17 db) [15:12] lut _35 4 0000 2s complement 4-bit correction to lut line 35 (attenuation 17.5 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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 28 HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz r eg 0 d h - lut c orrection 36 - 39 lut correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. multiplication factor for lut lines 32 - 47 (attenuation 15 to 23.5 db) is set in reg2 by bits mult_0 [13:12] bit name width default description [3:0] lut _36 4 0000 2s complement 4-bit correction to lut line 36 (attenuation 18 db) [7:4] lut _37 4 0000 2s complement 4-bit correction to lut line 37 (attenuation 18.5 db) [11:8] lut _38 4 0000 2s complement 4-bit correction to lut line 38 (attenuation 19 db) [15:12] lut _39 4 0000 2s complement 4-bit correction to lut line 39 (attenuation 19.5 db) r eg 0 e h - lut c orrection 40 - 43 lut correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. multiplication factor for lut lines 32 - 47 (attenuation 15 to 23.5 db) is set in reg2 by bits mult_0 [13:12] bit name width default description [3:0] lut _40 4 0000 2s complement 4-bit correction to lut line 40 (attenuation 20 db) [7:4] lut _41 4 0000 2s complement 4-bit correction to lut line 41 (attenuation 20.5 db) [11:8] lut _42 4 0000 2s complement 4-bit correction to lut line 42 (attenuation 21 db) [15:12] lut _43 4 0000 2s complement 4-bit correction to lut line 43 (attenuation 21.5 db) r eg 0fh - lut c orrection 44 - 47 lut correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. multiplication factor for lut lines 32 - 47 (attenuation 15 to 23.5 db) is set in reg2 by bits mult_0 [13:12] bit name width default description [3:0] lut _44 4 0000 2s complement 4-bit correction to lut line 44 (attenuation 22 db) [7:4] lut _45 4 0000 2s complement 4-bit correction to lut line 45 (attenuation 22.5 db) [11:8] lut _46 4 0000 2s complement 4-bit correction to lut line 46 (attenuation 23 db) [15:12] lut _47 4 0000 2s complement 4-bit correction to lut line 47 (attenuation 23.5 db) r eg 10h - lut c orrection 48 - 51 lut correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. multiplication factor for lut lines 48 - 63 (attenuation 24 to 31.5 db) is set in reg2 by bits mult_0 [15:14] bit name width default description [3:0] lut _48 4 0000 2s complement 4-bit correction to lut line 48 (attenuation 24 db) [7:4] lut _49 4 0000 2s complement 4-bit correction to lut line 49 (attenuation 24.5 db) [11:8] lut _50 4 0000 2s complement 4-bit correction to lut line 50 (attenuation 25 db) [15:12] lut _51 4 0000 2s complement 4-bit correction to lut line 51 (attenuation 25.5 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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 29 HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz r eg 11h - lut c orrection 52 - 55 lut correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. multiplication factor for lut lines 48 - 63 (attenuation 24 to 31.5 db) is set in reg2 by bits mult_0 [15:14] bit name width default description [3:0] lut _52 4 0000 2s complement 4-bit correction to lut line 52 (attenuation 26 db) [7:4] lut _53 4 0000 2s complement 4-bit correction to lut line 53 (attenuation 26.5 db) [11:8] lut _54 4 0000 2s complement 4-bit correction to lut line 54 (attenuation 27 db) [15:12] lut _55 4 0000 2s complement 4-bit correction to lut line 55 (attenuation 27.5 db) r eg 12h - lut c orrection 56 - 59 lut correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. multiplication factor for lut lines 48 - 63 (attenuation 24 to 31.5 db) is set in reg2 by bits mult_0 [15:14] bit name width default description [3:0] lut _56 4 0000 2s complement 4-bit correction to lut line 56 (attenuation 28 db) [7:4] lut _57 4 0000 2s complement 4-bit correction to lut line 57 (attenuation 28.5 db) [11:8] lut _58 4 0000 2s complement 4-bit correction to lut line 58 (attenuation 29 db) [15:12] lut _59 4 0000 2s complement 4-bit correction to lut line 59 (attenuation 29.5 db) r eg 13h - lut c orrection 60 - 63 lut correction values below can also be multiplied by 1,2,3, or 4 if more correction is needed. multiplication factor for lut lines 48 - 63 (attenuation 24 to 31.5 db) is set in reg2 by bits mult_0 [15:14] bit name width default description [3:0] lut _60 4 0000 2s complement 4-bit correction to lut line 60 (attenuation 30 db) [7:4] lut _61 4 0000 2s complement 4-bit correction to lut line 61 (attenuation 30.5 db) [11:8] lut _62 4 0000 2s complement 4-bit correction to lut line 62 (attenuation 31 db) [15:12] lut _63 4 0000 2s complement 4-bit correction to lut line 63 (attenuation 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 mo dul a t or s - di r e c t qu a d ra tu r e - s m t 10 10 - 30 c haracterization set-up HMC795LP5E v00.0409 sige wideband d irect quadrature modulator w / v g a, 50 - 2800 mhz

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