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400 mhz to 6 ghz broadband quadrature modulator data sheet adl5375 rev. c document feedback information furnished by analog devices is believed to be accurate and reliable. however, no responsibility is assumed by analog devices for its use, nor for any infringements of patents or other ri ghts of third parties that may result from its use. specifications subject to change without notice. no license is granted by implication or otherwise under any patent or patent rights of analog devices. trademarks and registered trademarks are the propert y of their respective owners. one technology way, p.o. box 9106, norwood, ma 02062 - 9106, u.s.a. tel: 781.329.4700 ? 2007 C 2013 analog devices, inc. all rights reserved. technical support www.analog.com features output frequency range: 4 00 mhz to 6 ghz 1 db output compression: 9.4 dbm from 450 mhz to 4 ghz output r eturn l oss 1 2 db from 450 mhz to 4.5 ghz noise floor: ?16 0 dbm/hz @ 900 mhz sideband suppression: ? 50 dbc @ 900 mhz carrier feedthrough: ? 40 dbm @ 900 mhz iq3db bandwidth: 7 50 mhz baseband input bias level adl5375 - 05 : 500 mv adl5375 - 15 : 1 500 mv single supply: 4.75 v to 5.25 v 24- lead lfcsp_vq pack age applications cellular c ommunication s ystems gsm/edge, cdma2000, w - cdma, td - scdma wimax/ lt e b roadband wireless access systems satellite modems functional block dia gram ibbp ibbn qbbn qbbp rfout dsop loip loin quadrature phase splitter adl5375 07052-001 figure 1. general description the adl5375 is a broadband quadrature modulator designed for operation from 400 mhz to 6 ghz. its excellent phase accuracy and amplitude balance enab le high performance intermediate frequency or direct radio frequency modulation for commu - nication systems. the adl5375 features a broad baseband bandwidth, along with an output gain flatness that varies no more than 1 db from 450 mhz to 3. 5 ghz . these features , c oupled with a bro ad- band ou tput return loss of ? 1 2 db , make the adl5375 ideally suited for broadband zero if or low if - to - rf applications, broadband digital predistortion transmitters , and multiband radio designs. the adl5375 accepts two differential baseband i nputs and a single - ended lo. it generates a single - ended 50 ? output. t he t wo versions offer input baseband bi as levels of 500 mv ( adl5375 - 05 ) and 1 5 0 0 m v ( adl5375 - 15 ). the adl5375 is fabricated using an advanced silicon - germaniu m bipolar process. it is available in a 24 - lead, exposed paddle, lead - free, lfcsp_vq p ackage. perform ance is specified over a ?40c to +85c temperature range. a lead - free evaluation board is also available.
adl5375 data sheet rev. c | page 2 of 36 table of contents features .............................................................................................. 1 applications ....................................................................................... 1 functional block diagram .............................................................. 1 general description ......................................................................... 1 revision history ............................................................................... 2 specifications ..................................................................................... 3 absolute maximum ratings ............................................................ 7 esd caution .................................................................................. 7 pin configuration and function descriptions ............................. 8 typical performance characteristics ............................................. 9 adl5375 - 05 .................................................................................. 9 adl5375 - 15 ................................................................................ 14 theory of operation ...................................................................... 19 circuit description ..................................................................... 19 basic connections .......................................................................... 20 power supply and grounding ................................................... 20 baseband inputs .......................................................................... 20 lo input ...................................................................................... 20 rf output .................................................................................... 20 output disable ............................................................................ 21 applications information .............................................................. 22 carrier feedthrough nulling .................................................... 22 sideband suppression optimization ....................................... 22 interfacing the adf4350 pll to the adl5375 ..................... 23 dac modulator int erfacing ..................................................... 24 gsm/edge operation ............................................................. 27 w - cdma operation ................................................................. 28 lo generat ion using plls ....................................................... 29 transmit dac options ............................................................. 29 modulator/demodulator options ........................................... 29 evaluation board ............................................................................ 30 characterization setup .................................................................. 33 outline dimensions ....................................................................... 35 ordering guide .......................................................................... 35 revision history 7/13 rev. b to rev. c changed cp - 24- 3 to cp - 24- 7 ........................................... universal 9 /11 rev. a to rev. b changes to features section ............................................................ 1 replaced table 1 ............................................................................... 3 changes to typical performance characteris tics section ........... 9 updated output disable s ection .................................................. 2 1 changes to application information s ection ............................ 2 2 changes to evaluation board section .......................................... 3 0 changes to figure 8 0 ...................................................................... 3 4 added exposed pad n otation to outline dimensions ............. 35 1 1 /08 rev. 0 to rev. a change ad9779 to ad977 9a .......................................... universal added endnote, i/q input bias level and absolute voltage level parameters, table 1 ................................................... 6 added absolute voltage level parameter, table 1 ........................ 6 12 /07 revision 0: initial version
data sheet adl5375 rev. c | page 3 of 36 specifications v s = 5 v; t a = 25c; lo = 0 dbm single - ended drive ; base band i/q amplitude = 1 v p - p differential sine waves in quadrature with a 500 mv ( adl5375 - 05) or 1500 mv ( adl5375 - 15) dc bias; baseband i/q frequency (f bb ) = 1 mh z, unless otherwise noted. table 1 . parameter conditions adl5375 - 05 adl5375 - 15 unit min typ max min typ max operating frequency range low frequency 400 400 mhz high frequency 6000 6000 mhz lo = 450 mhz output power, p out v iq = 1 v p - p differential 0.85 0.47 dbm modulator voltage gain rf ou tput divided by baseband input voltage ? 3.1 ? 3.5 db output p1db 9.6 10 dbm output return loss ? 16.4 ? 15.2 db carrier feedthrough ? 47.5 - 42.5 dbm sideband suppression ? 37.6 ? 38 dbc quadrature error 1.7 1.49 degrees i/q amplitude balance 0.07 0.10 db second harmonic p out ? (f lo + (2 f bb )) ? 75.9 ? 81.5 dbc adl5375 - 05 p out =0.85 dbm adl5375 - 15 p out = 0.47 dbm third harmonic p out ? (f lo + (3 f bb )) ? 51.5 ? 81.6 dbc adl5375 - 05 p out = 0.85 dbm adl5375 - 15 p out = 0.47 dbm output ip2 f1bb = 3.5 mhz, f2bb = 4.5 mhz, baseband i/q amplitude per tone = 0.5 v p - p differential 65.4 64.7 d bm output ip3 f1bb = 3.5 mhz, f2bb = 4.5 mhz, baseband i/q amplitude per tone = 0.5 v p - p differential 26.6 23.6 dbm noise floor i/q inputs = 0 v differential with a dc bias only, 20 mhz carrier offset ? 160.5 ? 157.0 dbm/hz lo = 900 mhz output power, p out v iq = 1 v p - p differential 0.75 0.41 dbm modulator voltage gain rf output divided by baseband input voltage ? 3.2 ? 3.5 db output p1db 9.6 10 dbm output return loss ? 15.7 ? 14.7 db carrier feedthrough ? 45.1 ? 39.9 dbm sideband suppression ? 52.8 ? 49.9 dbc quadrature error 0.01 0.20 degrees i/q amplitude balance 0.07 0.10 db second harmonic p out ? (f lo + (2 f bb )) ? 75.8 ? 77.2 dbc adl5375 - 05 p out = 0.75 dbm adl5375 - 15 p out = 0.41 dbm third harmonic p out ? (f lo + (3 f bb )) ? 50.7 ? 72.7 dbc adl5375 - 05 p out = 0.75 dbm adl5375 - 15 p out = 0.41 dbm output ip2 f1bb = 3.5 mhz, f2bb = 4.5 mhz, baseband i/q amplitude per tone = 0.5 v p - p differential 62.6 64.5 dbm output ip3 f1bb = 3.5 mhz, f2bb = 4.5 mhz, baseband i/q amplitude per tone = 0.5 v p - p differential 25.9 23.4 dbm noise floor i/q inputs = 0 v differential with a dc bias only, 20 mhz carrier offset ? 160.0 ? 157.1 dbm/hz
adl5375 data sheet rev. c | page 4 of 36 parameter conditions adl5375 - 05 adl5375 - 15 unit min typ max min typ max lo = 1900 mhz output power, p out v iq = 1 v p - p differential 0.53 0.49 dbm modulator voltage gain rf outp ut divided by baseband input voltage ? 3.4 ? 3.4 db output p1db 9.9 10.5 dbm output return loss ? 16.2 ? 15.5 db carrier feedthrough ? 40.3 ? 35.5 dbm sideband suppression ? 50.2 ? 49.4 dbc quadrature error 0.02 0.21 degrees i/q amplitude balance 0.07 0.10 db second harmonic p out ? (f lo + (2 f bb )) ? 67.9 ? 72.1 dbc adl5375 - 05 p out = 0.53dbm adl5375 - 15 p out = 0.49dbm third harmonic p out ? (f lo + (3 f bb )) ? 51.8 ? 62.8 dbc adl5375 - 05 p out = 0.53dbm adl5375 - 15 p out = 0.49dbm output ip2 f1bb = 3.5 mhz, f2bb = 4.5 mhz, baseband i/q amplitude per tone = 0.5 v p - p differential 62.6 61 dbm output ip3 f1bb = 3.5 mhz, f2bb = 4.5 mhz, baseband i/q amplitude per tone = 0.5 v p - p differential 24.3 22.1 dbm noise floor i/q inputs = 0 v differential with a dc bias only, 20 mhz carrier offset ? 160.0 ? 158.2 dbm/hz lo = 2150 mhz output power, p out v iq = 1 v p - p differential 0.73 0.57 dbm modulator voltage gain rf ou tput divided by baseband input voltage ? 3.2 ? 3.4 db output p1db 10.0 10.6 dbm output return loss ? 17.1 ? 16.1 db carrier feedthrough ? 39.7 ? 34.2 dbm sideband suppression ? 47.3 ? 50.2 dbc quadrature error ? 0.16 ? 0.18 degrees i/q amplitude balance 0.07 0.10 db second harmonic p out ? (f lo + (2 f bb )) ? 71.3 ? 81.7 dbc adl5375 - 05 p out = 0.73 dbm adl5375 - 15 p out = 0.57 dbm third harmonic p out ? (f lo + (3 f bb )) ? 52.4 ? 65.3 dbc adl5375 - 05 p out = 0.73 dbm adl5375 - 15 p out = 0.57 dbm output ip2 f1bb = 3.5 mhz, f2bb = 4.5 mhz, baseband i/q amplitude per tone = 0.5 v p - p differential 61.6 61.8 dbm output ip3 f1b b = 3.5 mhz, f2bb = 4.5 mhz, baseband i/q amplitude per tone = 0.5 v p - p differential 24.2 22.3 dbm noise floor i/q inputs = 0 v differential with a dc bias only, 20 mhz carrier offset ? 159.5 ? 157.9 dbm/hz lo = 2600 mhz output power, p out v iq = 1 v p - p differential 0.61 0.62 dbm modulator voltage gain rf output divided by baseband input voltage ? 3.4 ? 3.3 db output p1db 9.6 10.6 dbm output return loss ? 19.3 ? 18 db carrier feedthrough ? 36.5 ? 33.3 dbm sideband suppression ? 48.3 ? 48.5 dbc quadrature error ? 0.37 0.19 degrees i/q amplitude balance 0.07 0.11 db second harmonic p out ? (f lo + (2 f bb )) ? 60.9 ? 55.9 dbc
data sheet adl5375 rev. c | page 5 of 36 parameter conditions adl5375 - 05 adl5375 - 15 unit min typ max min typ max adl5375 - 05 p out = 0.61 dbm adl5375 - 15 p out = 0.62 dbm third harmonic p out ? (f lo + (3 f bb )) ? 51.3 ? 57.6 dbc adl5375 - 05 p out = 0.61 dbm adl5375 - 15 p out = 0.62 dbm output ip2 f1bb = 3.5 mhz, f2bb = 4.5 mhz, baseband i/q amplitude per tone = 0.5 v p - p differential 55.0 50.1 dbm output ip3 f1bb = 3.5 mhz, f2bb = 4.5 mhz, baseband i/q amplitude per tone = 0.5 v p - p differential 22.7 20.7 dbm noise floor i/q inputs = 0 v differential with a dc bias only, 20 mhz carrier offset ? 159.0 ? 157.6 dbm/hz lo = 3500 mhz output power, p out v iq = 1 v p - p differential 0.21 0.87 dbm modulator voltage gain rf ou tput divided by baseband input voltage ? 3.8 ? 3.1 db output p1db 9.6 10.2 dbm output return loss ? 20.7 ? 19.4 db carrier feedthrough ? 30.4 ? 28.6 dbm sideband suppression ? 48.3 ? 48.8 dbc quadrature error 0.01 0.13 degrees i/q amplitude balance 0.08 0.11 db second harmonic p out ? (f lo + (2 f bb )) ? 55.8 ? 63 dbc adl5375 - 05 p out = 0.21 dbm adl5375 - 15 p out = 0.87 dbm third harmonic p out ? (f lo + (3 f bb )) ? 50.2 ? 56.2 dbc a dl5375 - 05 p out = 0.21 dbm adl5375 - 15 p out = 0.87 dbm output ip2 f1bb = 3.5 mhz, f2bb = 4.5 mhz, baseband i/q amplitude per tone = 0.5 v p - p differential 51.1 57.9 dbm output ip3 f1bb = 3 .5 mhz, f2bb = 4.5 mhz, baseband i/q amplitude per tone = 0.5 v p - p differential 23.1 20.2 dbm noise floor i/q inputs = 0 v differential with a dc bias only, 20 mhz carrier offset ? 157.6 ? 156.3 dbm/hz lo = 5800 mhz output power, p out v iq = 1 v p - p differential ? 1.36 0.16 dbm modulator voltage gain rf output divided by baseband input voltage ? 5.3 ? 3.8 db output p1db 4.9 4.4 dbm output return loss ? 7.4 ? 8.6 db carrier feedthrough ? 19.5 ? 16.7 dbm sideband suppression ? 38.2 ? 39 dbc quadrature error ? 0.51 ? 0.50 degrees i/q amplitude balance ? 0.05 ? 0.70 db second harmonic p out ? (f lo + (2 f bb )) ? 52.6 ? 50 dbc adl5375 - 05 p out = - 1.36 dbm adl5375 - 15 p out = 0.16 dbm third harmonic p out ? (f lo + (3 f bb )) ? 45.7 ? 48.4 dbc adl5375 - 05 p out = - 1.36 dbm adl5375 - 15 p out = 0.16 dbm output ip2 f1bb = 3.5 mhz, f2bb = 4.5 mhz, baseband i/q amplitude per tone = 0.5 v p - p differential 39.1 38.7 dbm output ip3 f1bb = 3.5 mhz, f2bb = 4.5 mhz, baseband i/q amplitude per tone = 0.5 v p - p differential 14.6 11.2 dbm noise floor i/q inputs = 0 v differential with a dc bias only, 20 mhz carrier offset ? 153.0 ? 153.4 dbm/hz
adl5375 data sheet rev. c | page 6 of 36 parameter conditions adl5375 - 05 adl5375 - 15 unit min typ max min typ max lo inputs lo drive level characterization performed at typical level ? 6 0 +6 ? 6 0 +6 dbm input return loss 500 mhz < f lo < 3.3 ghz see figure 7 and figure 32 for r eturn loss vs. frequency ?10 ?10 db baseband inputs pin ibbp, pin ibbn, pin qbbp, pin qbbn i/q input bias level 1 500 1500 mv absolute voltage level 1 on pin ibbp, pin ibbn, pin qbbp, pin qbbn 0 1 1 2 v input bias current current sourcing from each baseband input 41 32 a input offset current 0.1 0.1 a differential input impedance 60 100 k? bandwidth (0.1 db) lo = 1900 mhz, baseband input = 500 mv p - p sine wave 95 80 mhz output d isable pin dsop off isolation p out (dsop low ) ? p out (dsop high ) 84 85 db dsop high , lo leakage, lo = 2150 mhz ? 55 ? 53 dbm turn - on settling time dsop high to low (90% of envelope) 220 220 ns turn - off settling time dsop low to high ( 10% of envelope) 100 100 ns dsop high level (logic 1) 2.0 2.0 v dsop low level (logic 0) 0.8 0.8 v power supplies pin vps1 and pin vps2 voltage 4.75 5.25 4.75 5.25 v supply current dsop = low 194 203 ma dsop = high 126 127 ma 1 the input bias level can vary as long as the voltages on the individual ibbp, ibbn, qbbp, and qbbn pins remain within the spe cified absolute voltage leve l.
data sheet adl5375 rev. c | page 7 of 36 absolute maximum rat ings table 2 . parameter rating supply voltage , vpos 5.5 v ibbp, ibbn, qbbp, qbbn 0 v to 2 v loip and loin 13 dbm internal power dissipation adl5375 - 05 1500 mw adl5375 - 15 1200 mw ja (exposed paddle soldered down) 1 54c/w maximum junction temperature 150c operating temperature range ? 40c to +85c storage temperature range ? 65c to +150c 1 per jdec standard jesd 51 - 2. for information on optimizing thermal impedance, see the thermal grounding and evaluation board layout section . stresses above those listed under absolute maximum ratings may cause permanent damage to the device. this is a stress rating only; functional operation of the device at th ese or any other conditions above those indicated in the operational section of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. esd caution
adl5375 data sheet rev. c | page 8 of 36 pin configuration an d function description s adl5375 top view (not to scale) dsop loip comm loin comm nc vps1 rfout comm nc comm nc 1 3 2 4 5 6 18 16 17 15 14 13 nc qbbn comm qbbp comm comm vps2 ibbn comm ibbp comm comm 7 9 8 10 11 12 24 22 23 21 20 19 notes 1. nc = no connect. do not connect to this pin. 2. connect to the ground lane via a low impedance path. 07052-003 figure 2. pin configuration table 3 . pin function descriptions pin no. mnemonic description 1 dsop output disable . a logic high on this pin disable s the rf o utput . connect this pin to ground or leave it float ing to enable the output. 2, 5, 8, 11, 12, 14, 17, 19, 20, 23 comm input common pins . connect to the ground plane via a low impedance path. 3, 4 loip, loin local oscillator input s . single - ended operation: the loip pin is drive n from the lo source through an ac - coupling capacitor while the loin pin is ac - coupled to ground through a capacitor. differential operation: the loip and loin pins must be driven differentially through ac - coupling cap a citors in this mode of operation. 6 , 7, 13, 15, nc no connect . these pins can be left open or tied to ground . 9, 10, 21, 22 qbbn, qbbp, ibbp, ibbn differential in - phase and quadrature baseband inputs . these h igh impedance inputs should be dc - biased to the recommended level depending on the version . adl5375 - 05: 500 mv adl5375 - 15: 1 500 mv these inputs should be driven from a low impedance source. nominal ch aracterized ac signal swing is 5 00 mv p - p on each pin. this results in a differen tial drive of 1 v p - p. these inputs are not self - biased and have to be externally biased. 16 rfout rf output . single - ended, 50 ? internally biased rf output . rfout mus t be ac - coupled to the load. 18, 24 vps1, vps2 positive supply voltage pins . all pins should be connected to the same supply (v s ). to ensure adequate external bypassing, connect 0.1 f and 100 pf capacitors between each pin and ground. ep exposed paddle . connect to the ground plan e via a low impedance path.
data sheet adl5375 rev. c | page 9 of 36 typical performance characteristics adl5375 - 05 v s = 5 v; t a = 25c; lo = 0 dbm single - ended drive; baseband i/q amplitude = 1 v p - p differential sine waves in quadrature with a 500 mv dc bias ; baseband i/q frequency (f bb ) = 1 mhz, unless otherwise noted. t a = ?40c t a = +85c t a = +25c ?5 ?4 ?3 ?2 ?1 0 1 2 3 4 5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) ssb output power (dbm) 07052-052 figure 3 . single- sideband (ssb) output power (p out ) vs. lo frequency (f lo ) and temperature v s = 4.75v v s = 5.0v ?5 ?4 ?3 ?2 ?1 0 1 2 3 4 5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) ssb output power (dbm) v s = 5.25v 07052-053 figure 4. single - sideband (ssb) output power (p out ) vs. lo frequency (f lo ) and supply 0 2 4 6 8 10 14 12 t a = ?40c t a = +85c t a = +25c 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) 1db output compression (dbm) 07052-054 figure 5 . ssb output 1db compression point (op1db) vs. lo frequency (f lo ) and temperature v s = 5.25v v s = 5.0v 0 2 4 6 8 10 12 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) 1db output compression (dbm) v s = 4.75v 07052-055 figure 6 . ssb output 1db compr ession point (op1db) vs. lo frequency (f lo ) and supply 07052-097 0 180 30 330 60 90 270 300 120 240 150 210 s11 s22 6ghz 6ghz 400mhz 400mhz 1 2 3 4 1 400mhz 25.73 C j8.14 2 s11 6ghz 75.88 C j76.94 3 s22 400mhz 40.01 + j9.20 4 s22 6ghz 30.52 C j30.09 figure 7 . smith chart of loip (loin ac - coupled to ground) s11 and rfout s22 from 450 mhz to 6000 mhz ?30 ?25 ?20 ?15 ?10 ?5 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 frequency (ghz) return loss (db) loip rfout 07052-056 figure 8 . return loss of loip (loin ac - cou pled to ground) s11 and rfout s22 from 450 mhz to 6000 mhz
adl5375 data sheet rev. c | page 10 of 36 ?60 ?55 ?50 ?45 ?40 ?35 ?30 ?25 ?20 ?15 ?10 ?5 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) carrier feedthrough (dbm) t a = +85c t a = ?40c t a = +25c 07052-057 figure 9 . carrier feedthrough vs. lo frequency (f lo ) and temperature; multiple devices shown carrier feedthrough (dbm) 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) t a = +85c t a = ?40c t a = +25c ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?10 0 07052-058 figure 10 . carrier feedthrough vs. lo frequen cy (f lo ) and temperature after nulling at 25c; multiple devices shown ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?10 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) sideband suppression (dbc) t a = +85c t a = ?40c t a = +25c 07052-059 figure 11 . sideband suppression vs. lo frequency (f lo ) and temperature; multiple devices shown ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?10 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) sideband suppression (dbc) t a = +85c t a = ?40c t a = +25c 07052-060 figure 12 . sideband suppressio n vs. lo frequency (f lo ) and temperature after nulling at 25c; multiple devices shown ?110 ?100 ?90 ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?10 1 ?15 ?10 ?5 0 5 10 carrier feedthrough (dbm) second-order distortion (dbc) third-order distortion (dbc) sideband suppression (dbc) 0.1 2 ssb output power (dbm) baseband input voltage (v p-p) second-order distortion, third-order distortion, carrier feedthrough, and sideband suppression (dbc) ssb output power (dbm) 07052-061 figure 13 . second - and third - order distortion, carrier feedthrough, sid e band suppression, and ssb p out vs. baseband differential input level (f lo = 900 mhz) ?110 ?100 ?90 ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?10 1 ?15 ?10 ?5 0 5 10 carrier feedthrough (dbm) second-order distortion (dbc) third-order distortion (dbc) sideband suppression (dbc) 0.1 2 ssb output power (dbm) baseband input voltage (v p-p) second-order distortion, third-order distortion, carrier feedthrough, and sideband suppression (dbc) ssb output power (dbm) 07052-062 figure 14 . second - and third - order distortion, carrier feedthrough, sid e band suppression, and ssb p out vs. baseband differential input level (f lo = 2150 mhz)
data sheet adl5375 rev. c | page 11 of 36 07052-063 ?100 ?90 ?80 ?70 ?60 ?50 ?40 ?30 ?20 0 ?10 1 ?15 ?10 ?5 0 5 10 carrier feedthrough (dbm) second-order distortion (dbc) third-order distortion (dbc) sideband suppression (dbc) 0.1 2 ssb output power (dbm) baseband input voltage (v p-p) second-order distortion, third-order distortion, carrier feedthrough, and sideband suppression (dbc) ssb output power (dbm) figure 15 . second - an d third - order distortion, carrier feedthrough, sid e band suppression, and ssb p out vs. baseband differential input level (f lo = 3500 mhz) ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?10 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) second-order distortion and third-order distortion (dbc) third-order second-order t a = +85c t a = ?40c t a = +25c 07052-064 figure 16 . second - and third - order distortion vs. lo frequency (f lo ) and temperature (ba seband i/q amplitude = 1 v p - p differential) 1 10 100 ?3.5 ?2.5 ?1.5 ?0.5 0.5 1.5 ?70 ?60 ?50 ?40 ?30 ?20 ssb output power (dbm) baseband frequency (mhz) second-order distortion, carrier feedthrough, sideband suppression (db) ssb output power (dbm) carrier feedthrough (dbm) sideband suppression (dbc) se c o nd - o rd er d i s t o r t io n ( d b c ) 07052-098 figure 17 . second - order distortion, carrier feedthrough, sideband suppre s sion, and ssb p out vs. baseband frequency (f bb ); f lo = 2140 mhz output third-order intercept (dbm) 0 30 25 20 15 10 5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) t a = +25c 07052-087 t a = ?40c t a = +85c figure 18 . oip3 vs. lo frequency (f lo ) and temperature (p out ? 5 dbm) 0 10 20 30 40 50 60 70 80 output second-order intercept (dbm) 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) t a = ?40c t a = +85c t a = +25c 07052-088 figure 19 . oip2 vs. lo frequency (f lo ) and temperature (p out ? 5 dbm) ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?6 ?4 ?2 0 2 4 6 ?4 ?3 ?2 ?1 0 1 2 ssb output power (dbm) lo amplitude (dbm) second-order distortion, third-order distortion,sideband suppression (dbc), and carrier feedthrough (dbm) carrier feedthrough (dbm) sideband suppression (dbc) ssb output power (dbm) second-order distortion (dbc) third-order distortion (dbc) 07052-065 figure 20 . second - and third - order distortion, carrier feedthrough, sid e band suppression, and ssb p out vs. lo amplitude (f lo = 900 mhz)
adl5375 data sheet rev. c | page 12 of 36 ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?6 ?4 ?2 0 2 4 6 ?4 ?3 ?2 ?1 0 1 2 ssb output power (dbm) lo amplitude (dbm) second-order distortion, third-order distortion,sideband suppression (dbc), and carrier feedthrough (dbm) carrier feedthrough (dbm) second-order distortion (dbc) third-order distortion (dbc) sideband suppression (dbc) ssb output power (dbm) 07052-066 figure 21 . second - and third - order distortion, carrier feedthrough, sid e band suppression, and ssb p out vs. lo amplitude (f lo = 2150 mhz) ?70 ?60 ?50 ?40 ?30 ?20 ?10 ?6 ?4 ?2 0 2 4 6 ?5 ?4 ?3 ?2 ?1 0 1 ssb output power (dbm) lo amplitude (dbm) second-order distortion, third-order distortion,sideband suppression (dbc), and carrier feedthrough (dbm) carrier feedthrough (dbm) second-order distortion (dbc) third-order distortion (dbc) sideband suppression (dbc) ssb output power (dbm) 07052-067 figure 22 . second - and third - order distortion, carrier feedthrough, sid e band suppression, and ssb p out vs. lo amplitude (f lo = 3500 mhz) ?40 25 85 v s = 5.25v v s = 5.0v v s = 4.75v 165 210 205 200 195 190 185 180 175 170 temperature (c) supply current (ma) 07052-068 figure 23 . power supply current vs. temperature 0 2 4 6 8 10 12 14 16 18 ?160.5 ?160.3 ?160.1 ?159.9 ?159.7 ?159.5 ?159.3 ?159.1 07052-089 quantity noise (dbm/hz) figure 24 . 20 mhz offset noise floor distribution at f lo = 900 mhz (i/q amplitude = 0 mv p - p with 500 mv dc bias) 0 1 2 3 4 5 6 7 8 ?160.5 ?160.1 ?159.7 ?159.3 ?158.9 ?158.5 07052-090 quantity noise (dbm/hz) figure 25 . 20 mhz offset noise floor distribution at f lo = 2140 mhz (i/q amplitude = 0 mv p - p with 500 mv dc bias) 07052-099 quantity noise (dbm/hz) 0 1 2 3 4 5 6 7 8 9 10 ?158.9 ?158.5 ?158.1 ?157.7 ?157.3 ?156.9 ?156.5 f igure 26 . 20 mhz offset noise floor distribution at f lo = 3500 mhz (i/q amplitude = 0 mv p - p with 500 mv dc bias)
data sheet adl5375 rev. c | page 13 of 36 78 79 80 81 82 83 85 88 86 ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?10 0 carrier feedthrough (dbm) ssb output power isolation (db) 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) ssb output power isolation (db) carrier feedthrough (dbm) 07052-091 figure 27 . ssb p out isolation and carrier feedthrough with dsop high
adl5375 data sheet rev. c | page 14 of 36 adl53 75- 15 v s = 5 v; t a = 25c; lo = 0 dbm single - ended drive; baseband i/q amplitude = 1 v p - p differential sine waves in quadrature with a 1500 mv dc bias ; baseband i/q frequency (f bb ) = 1 mhz, unless otherwise noted. ?5 ?4 ?3 ?2 ?1 0 1 2 3 4 5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) ssb output power (dbm) t a = ?40c t a = +85c t a = +25c 07052-069 figure 28 . s ingle - sideband (ssb) output power (p out ) vs. lo frequency (f lo ) and temperature ?5 ?4 ?3 ?2 ?1 0 1 2 3 4 5 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) ssb output power (dbm) v s = 4.75v v s = 5.0v v s = 5.25v 07052-070 figure 29 . single - sideband (ssb) output power (p out ) vs. lo frequency (f lo ) and supply 0 2 4 6 8 10 12 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) 1db output compression (dbm) t a = ?40c t a = +85c t a = +25c 07052-071 figure 30 . ssb output 1db comp ression point (op1db) vs. lo frequency (f lo ) and temperature 0 2 4 6 8 10 12 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) 1db output compression (dbm) v s = 5.25v v s = 5.0v v s = 4.75v 07052-072 figure 31 . ssb output 1db compression point (op1db) vs. lo frequency (f lo ) and supply 0 180 30 330 60 90 270 300 120 240 150 210 07052-102 s11 s22 1 s11 400mhz 25.07 C j7.11 2 s11 6ghz 96.98 C j74.75 3 s22 400mhz 38.63 + j10.34 4 s22 6ghz 34.35 C j30.63 1 2 3 4 6ghz 6ghz 400mhz 400mhz figure 32 . smith chart of loip (loin ac - coupled to ground) s11 and rf out s22 from 450 mhz to 6000 mhz ?30 ?25 ?20 ?15 ?5 ?10 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 frequency (ghz) return loss (db) loip rfout 07052-073 figure 33 . return loss of loip (loin ac - coupled to ground) s11 and rfout s22 from 450 mhz to 6000 mhz
data sheet adl5375 rev. c | page 15 of 36 ?60 ?55 ?50 ?45 ?40 ?35 ?30 ?25 ?20 ?15 ?10 ?5 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) carrier feedthrough (dbm) t a = +85c t a = ?40c t a = +25c 07052-074 figure 34 . carrier feedthrough vs. lo frequen cy (f lo ) and temperature; multiple devices shown ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?10 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) carrier feedthrough (dbm) t a = +85c t a = ?40c 07052-075 t a = +25c figure 35 . carrier feedthrough vs. lo frequency (f lo ) and temperature after nulling at 25c; multiple devices shown ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?10 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) sideband suppression (dbc) t a = +85c t a = ?40c t a = +25c 07052-076 figure 36 . sideband suppression vs. lo frequency (f lo ) and temperature; multiple devices shown ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?10 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) sideband suppression (dbc) t a = +85c t a = ?40c t a = +25c 07052-077 figure 37 . sideband suppression vs. lo frequency (f lo ) and temperature after nulling at 25c; multiple devices shown ?100 ?90 ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?10 0 1 ?15 ?10 ?5 0 5 10 0.1 ssb output power (dbm) baseband input voltage (v p-p) second-order distortion, third-order distortion, carrier feedthrough, and sideband suppression (dbc) 07052-078 ssb output power (dbm) carrier feedthrough (dbm) sideband suppression (dbc) third-order distortion (dbc) second-order distortion (dbc) figure 38 . secon d - and third - order distortion, carrier feedthrough, sid e band suppression, and ssb p out vs. baseband differential input level (f lo = 900 mhz) ?100 ?90 ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?10 0 1 ?15 ?10 ?5 0 5 10 0.1 ssb output power (dbm) baseband input voltage (v p-p) second-order distortion, third-order distortion, carrier feedthrough, and sideband suppression (dbc) 07052-079 carrier feedthrough (dbm) sideband suppression (dbc) third-order distortion (dbc) second-order distortion (dbc) ssb output power (dbm) figure 39 . second - and third - order distortion, carrier feedthrough, sid e band suppress ion, and ssb p out vs. baseband differential input level (f lo = 2150 mhz)
adl5375 data sheet rev. c | page 16 of 36 ?100 ?90 ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?10 0 1 ?15 ?10 ?5 0 5 10 0.1 ssb output power (dbm) baseband input voltage (v p-p) second-order distortion, third-order distortion, carrier feedthrough, and sideband suppression (dbc) 07052-080 carrier feedthrough (dbm) sideband suppression (dbc) third-order distortion (dbc) second-order distortion (dbc) ssb output power (dbm) figure 40 . second - and third - order distortion, carrier feedthrough, sid e band suppression, and ssb p out vs. baseband differential input level (f lo = 3500 mhz) ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?10 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) second-order distortion and third-order distortion (dbc) second-order t a = +85c t a = ?40c third-order 07052-081 t a = +25c figure 41 . second - and third - order distortion vs. lo frequency (f lo ) and temperature (baseband i/q amplitude = 1 v p - p differential) 1 10 100 ?3.5 ?2.5 ?1.5 ?0.5 0.5 1.5 ?70 ?60 ?50 ?40 ?30 ?20 ssb output power (dbm) baseband frequency (mhz) second-order distortion, carrier feedthrough, sideband suppression ssb output power (dbm) carrier feedthrough (dbm) sideband suppression (dbc) sec o nd -o rd er d i st o r t io n (d b c ) 07052-103 figure 42 . second - order distortion, carrier feedthrough, si deband suppre s sion, and ssb p out vs. baseband frequency (f bb ); f lo = 2140 mhz output third-order intercept (dbm) 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) t a = ?40c t a = +85c t a = +25c 07052-092 figure 43 . oip3 vs. lo frequency (f lo ) and temperature (p out ? 5 dbm @ f lo = 900 mhz) 0 10 20 30 40 50 60 70 output second-order intercept (dbm) 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) t a = ?40c t a = +85c t a = +25c 07052-093 figure 44 . oip2 vs. lo frequency (f lo ) and temperature (p out ? 5 dbm @ f lo = 900 mhz) ?90 ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?6 ?4 ?2 0 2 4 6 ?2 ?1 0 1 2 ssb output power (dbm) lo amplitude (dbm) second-order distortion, third-order distortion, carrier feedthrough, and sideband suppression (dbc) carrier feedthrough (dbm) sideband suppression (dbc) ssb output power (dbm) second-order distortion (dbc) third-order distortion (dbc) 07052-082 figure 45 . second - and third - order distortion, carrier feedthrough, sid e band suppre ssion, and ssb p out vs. lo amplitude (f lo = 900 mhz)
data sheet adl5375 rev. c | page 17 of 36 ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?6 ?4 ?2 0 2 4 6 ?2 ?1 0 1 2 ssb output power (dbm) lo amplitude (dbm) second-order distortion, third-order distortion, carrier feedthrough, and sideband suppression (dbc) carrier feedthrough (dbm) second-order distortion (dbc) third-order distortion (dbc) sideband suppression (dbc) ssb output power (dbm) 07052-083 figure 46 . second - and third - order distortion, carrier feedthrough, sid e band suppression, and ssb p out vs. lo amplitude (f lo = 2150 mhz) ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?6 ?4 ?2 0 2 4 6 ?2.0 ?1.5 ?1.0 ?0.5 0 0.5 1.0 1.5 2.0 ssb output power (dbm) lo amplitude (dbm) second-order distortion, third-order distortion, carrier feedthrough, and sideband suppression (dbc) carrier feedthrough (dbm) second-order distortion (dbc) third-order distortion (dbc) sideband suppression (dbc) ssb output power (dbm) 07052-084 figure 47 . second - and third - order distortion, carrier feedthrough, sid e band suppression, and ssb p out vs. lo amplitude (f lo = 3500 mhz) 0.160 0.230 0.220 0.210 0.200 0.190 0.180 0.170 temperature (c) supply current (a) ?40 25 85 v s = 5.25v v s = 5.0v v s = 4.75v 07052-085 figure 48 . power supply current vs. temperature ?158.0 ?157.8 ?157.6 ?157.4 ?157.2 ?157.0 ?156.8 ?156.6 0 2 4 6 8 10 12 14 16 18 07052-094 quantity noise (dbm/hz) figure 49 . 20 mhz off set noise floor distribution at f lo = 900 mhz (i/q amplitude = 0 mv p - p with 1500 mv dc bias) 0 2 4 6 8 10 12 ?158.5 ?158.3 ?158.1 ?157.9 ?157.7 ?157.5 ?157.3 ?157.1 07052-095 quantity noise (dbm/hz) figure 50 . 20 mhz offset noise floor distribution at f lo = 2140 mhz (i/q amplitude = 0 mv p - p with 1500 mv dc bias) 07052-104 quantity noise (dbm/hz) 0 1 2 3 4 5 6 7 8 9 ?157.5 ?157.1 ?156.7 ?156.3 ?155.9 ?155.5 figure 51 . 20 mhz offset noise floor distribution at f lo = 3500 mhz (i/q amplitude = 0 mv p - p with 500 mv dc bias)
adl5375 data sheet rev. c | page 1 8 of 36 74 76 78 80 82 84 86 88 ?90 ?80 ?70 ?60 ?50 ?40 ?30 ?20 ?10 0 carrier feedthrough (dbm) ssb output power isolation (db) 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 lo frequency (ghz) 07052-096 ssb output power isolation (db) carrier feedthrough (dbm) figure 52 . ssb p out isolation and carrier feedthrough with dsop high
data sheet adl5375 rev. c | page 19 of 36 theory of operatio n circuit description the adl5375 can be divided into five circuit blocks: the lo interface, the baseband voltage - to - current (v - to - i) converter, the mixers, the differential - to - single - ended (d - to - s) stage, a nd the bias circuit. a block diagram of the device is shown in figure 53. phase splitter loi p loin ibb p ibbn qbb p qbbn 07052-028 rfout dsop figure 53 . block diagram the lo interface generates two lo signals in quadrature. these signals are used to drive the mixer s. the i/ q baseband input signals are converted to currents by the v - to - i stages, which then drive the two mixers. the outputs of these mi x ers combine to feed the output balun, which provides a single - ended output. the bias cell generates reference cu r rent s for the v - to - i stage. lo interface the lo interface consists of a polyphase quadrature splitter and a limiting amplifier. the lo input impedance is set by the polyphase splitter . each quadrature lo signal then passes through a limiting amplifier that provides the mixer with a li mited drive signal. the lo input can be driven single - ended or differentially. for applications above 3 ghz, improved oip2 and lo leakage may result from driv ing the lo input differentially . v - to - i converter the differential baseband inputs (qbbp, qbbn, ibbn, and ibbp) present a high impedance. the voltages applied to these pins drive the v - to - i stage that converts baseband voltages into currents. the differential output currents of the v - to - i stages feed each of their respec tive mixers. the dc common - mode vo l tage at the baseband inputs sets the currents in the two mixer cores. varying the baseband common - mode voltage influences the curre nt in the mixer and affects overall modula - tor performanc e. the recommended dc voltage fo r the baseband common - mode voltage is 500 mv dc for the adl5375 - 05 and 1500 m v for the adl5375 - 15. mixers the adl53 75 has two double - balanced mixers: one for the in - phase chann el (i channel) and on e for the quadrature chan - nel (q - channel). the output currents from the two mixers sum together into a n internal load. the signal developed across this load is used to drive the d - to - s stage. d - to - s stage the output d - to - s stage consists of an on - chip active balun that converts the differential signal to a single - ended signal. the balun presents 50 impedance to the output (vout). therefore , no matching network is needed at the rf ou tput for optimal power transfer in a 50 environment . bias circuit an on - chip band gap reference circuit is used to generate a pr o portional - to - absolute temperature (p tat) reference current for the v - to - i stage. dsop the dsop pin can be used to disable the output stage of the modulator. if the dsop pin is connecte d to ground or left unconnected, the part operate s normally. if the dsop pin is connected to the positive v oltage supply , the output stage is disabled and the lo leakage is also reduced.
adl5375 data sheet rev. c | page 20 of 36 basic connections vps1 rfout comm nc comm nc nc qbbn comm nc qbbp comm comm vps2 ibbn comm ibbp comm comm dsop vpos ba loip comm loin comm 1 2 3 4 5 6 18 17 16 15 14 13 c1 100pf c6 100pf c5 0.1f c3 100pf 24 23 22 21 20 19 7 8 9 10 11 12 vpos rfout exposed paddle z1 adl5375 gnd c2 100pf c4 0.1f qbbn qbbp loip c7 100pf ibbn ibbp vpos s1 07052-029 figure 54. basic connections for the adl5375 figure 54 shows the basic connections for the adl5375 . power supply and grounding pin vps1 and pin vps2 should be connected to the same 5 v source. each pin should be decoupled with a 100 pf and 0.1 f capacitor. these capacitors should be located as close as possible to the device. the power supply can range between 4.75 v and 5.25 v. the ten comm pins should be tied to the same ground plane through low impedance paths. the exposed paddle on the underside of the package should also be soldered to a ground plane with low thermal and electrical impedance. if the ground plane spans multiple layers on the circuit board, they should be stitched together with nine vias under the exposed paddle as illustrated in the evaluation board section. the an-772 application note discusses the thermal and electrical grounding of the lfcsp (qfn) package in detail. baseband inputs the baseband inputs (ibbp, ibbn, qbbp, and qbbn) should be driven from a differential source. the nominal drive level used in the characterization of the adl5375 is 1 v p-p differential (or 500 mv p-p on each pin). all the baseband inputs must be externally dc biased. the recommended common-mode level is dependent on the version of the adl5375 . ? adl5375-05 : 500 mv ? adl5375-15 : 1500 mv lo input the lo input is designed to be driven from a single-ended source. the lo source is ac-coupled through a series capacitor to the loip pin while the loin pin is ac-coupled to ground through a second capacitor. the typical lo drive level, which was used for the characterization of the adl5375 , is 0 dbm. differential operation is also possible, in which case both sides of the differential lo source should be ac-coupled through a pair of series capacitors to the loip and loin pins. rf output the rf output is available at the rfout pin (pin 16), which can drive a 50 load. the internal balun provides a low dc path to ground. in most situations, the rfout pin must be ac-coupled to the load.
data sheet adl5375 rev. c | page 21 of 36 output d isable the adl5375 incorporates an output disable pin feature that shut s down the output amplifier stage to isolate the modulator from the load. this output is disabled when the voltage on the dsop exceeds 2 v. the output is enabled when the dsop pin is either tied to ground or left unconnected. asserting dsop further reduces lo leakage (see figure 27 and figure 52) and drives the broadband noise of the device down to just above the kt thermal noise level. asserting dsop also reduces the supply cu r rent of the adl5375 from 200 ma to 127 ma. the time delay between when dsop pin going low and the output power being restored is approximately 200 ns. the time delay when dsop going high and output being disable d is less than 100 ns.
adl5375 data sheet rev. c | page 22 of 36 applications informa tion carrier f eedthrough nulling lo leakage results from minute dc offsets that occur on the differential baseband inputs. in an iq modulator, non - zero differential offsets mix with the lo and result in lo leakage to the rf output. in addition to this effect, some of the signal power at the lo in put couples directly to the rf o utput (this may be a result of bond - wire to bond - wire coupling or coupling through the silicon substrate). the net lo l eakage at the rf output is the vector combi nation of the signals that appear at the output as a result of these two effects. the devices nominal carrier feedthrough can be nulled by adding small external differential offset voltages on the i and q inputs. nulling the carrier feedthrough is a mult i step process. initially, with the i - channel offset held constant (at 0 mv), the q - channel offset is varied until a minimum lo leakage level is obtained. this q - channel offset voltage is then held constant, while the offset on the i - channel is adjusted unt il a new minimum is reached. through two iterations of this process, the lo leakage can be reduced to an arbitrarily low level. this level is only limited by the available offset voltage steps and by the modulators noise floor. figure 55 illustrates the typical relationship between lo leakage and dc offset at 1900 mhz. in this case, differential offset voltages of approximately +0.5 mv and ? 0.5 mv on the i and q inputs , respectively, result in the lowest carrier feedthrough . it is important to note that the required offset nulling voltage change s in polarity and magnitude from device to device and over temperature and frequency. to ensure that all devices in a mass production environment can be adequately nulled, an offset adjustm ent range of approximately 10 mv should be provided. carrier feedthrough (dbm) i and q offset voltage (v) ?92 ?87 ?82 ?77 ?72 ?67 ?62 ?57 ?1.0 ?0.8 ?0.6 ?0.4 ?0.2 0 0.2 0.4 0.6 0.8 1.0 q offset sweep i offset sweep 07052-031 figure 55 . example of typical c arrier f eedthrough vs. dc offset voltage it is important to note that the carrier feed through is not affected by the dc bias levels (also calle d the common - m ode level) on the i and q inputs. a differential offset voltage must be applied, s o after nulling, the average voltage on the ip and in inputs can be slightly different. using figure 55 as an example, after lo leak age nulling, the average dc level on ip and in can be 500.25 mv and 499.75 mv. the same applies to the q - channel. for the adl5375 - 15, the same theory applies except tha t v ibbp = v ibbn = 1500 mv . it is often de sirable to perform a one - time carrier null. this is usually performed at a given frequency. after this factory calibration, the iq modulator operates over a frequency range on each side of the calibration frequency. the nulled lo leakage level degrade s som ewhat because the lo frequency is moved away from the calibration frequency. despite this degradation, the overall lo leakage across a frequency band can be expected to be better than when no nulling is performed. this assumes an operating frequency band t hat is in the 30 mhz to 60 mhz range . lo leakage nul ling is discussed further in an - 1039, correcting imperfections in iq modulators to improve rf signal fidelity . sideband suppression optimization sideband s uppression results from relative gain and relative phase offsets between the i - channel and q - channel and can be suppressed through adjustments to those two parameters. figure 56 illustrates how sideband suppression is affected by the gain and phase imbalances. 0db 0.0125db 0.025db 0.05db 0.125db 0.25db 0.5db 1.25db 2.5db 0 ?10 ?20 ?30 ?40 ?50 ?60 ?70 ?80 ?90 0.01 0.1 1 10 100 sideband suppression (dbc) phase error (degrees) 07052-032 figure 56 . sideband suppression vs. quadrature phase error for various quadrature amplitude offsets figure 56 underlines the fact that adjusting only one parameter i mproves the sideband suppression only to a point, unless the other parameter is also adjusted. for example, if the amplitude offset is 0.25 db, improving the phase imbalance by better than 1 does not yield any improvement in the sideband suppression. for optimum sideband suppression, an iterative adjustment between phase and amplitude is required. the sideband suppression nulling can be performed either through adjusting the gain for each channel or through the modification of the phase and gain of the dig ital data coming from the baseband signal processor.
data sheet adl5375 rev. c | page 23 of 36 sideband suppression is discussed further in an - 1100, wireless transmitter iq balance and sideband suppression , as well as in an - 1039, correcting imperfections in iq modulators to improve rf signal fidelity . i nterfacing the adf43 50 pll to the adl5375 with an output frequency range of 137.5 to 4.4 ghz, a high performance integrated vco and an lo output power leve l that can be programmed from ? 4 dbm to +5 dbm, the adf4350 wideband synthesizer is ideally suited to drive the adl5375 lo port. care must be taken to adequately suppress the harmonics of the lo signal from the pll. vcos typically have a third harmonic power of approximately ? 10 dbc. a large third harmonic on the lo degrade s the quality of the quadrature generation inside the iq modulator. the third harmonic should be suppressed to a level of C 30 dbc or lower to prevent quadrature degradation. so approximately 20 db of attenuation is required to get the third harmonic below ? 30 dbc. figure 57 show s p ll m odulator interfaces schematic that for this operation at four di fferent frequencies , and table 4 shows the optimized components value of figure 57 . because filtering of the third harmonic is most critical, and to ensure wide frequency range coverage, the 3 db corner of the filters ha ve been set to approximately 1.2 ~1.5 times t he maximum desired lo frequency . a chebyshev filter topology at 100 ? differential source impedance and 50 ? differential load impedance was used for optimal performance. adf4350 12 rf out a+ 13 rf out a? adl5375 3 loip 4 loin l1 l2 1nf l1 l2 1nf c1a c1a c1c c2a c2a c2c c3a c3a c3c z bias z bias 120pf 120pf 0.1f 3.3v r1 07052- 11 1 figure 57 . pll - modulator i nterface schematic table 4 . pll modulator i nterface components values ( dni = do n ot insert) frequency range (mhz) zbias (nh) r1 (?) l1 (nh) l2 (nh) c1a (pf) c1c (pf) c2a c2c (pf) c3a (pf) c3c (pf) 500 to 1300 27 100 3.9 3.9 dni 4.7 dni 5.6 dni 3.3 850 to 2450 19 100 2.7 2.7 3.3 dni 4.7 dni 3.3 dni 1250 to 2800 7.5 100 0 ? 3.6 dni dni 2.2 dni 1.5 dni 2800 to 4400 3.9 100 0 ? 0 ? dni dni dni dni dni dni
adl5375 data sheet rev. c | page 24 of 36 the two pull - up inductors of the zbias provide two 50 ? source impedances in combination with r1 resistor in parallel for the filter . w hile the adl5375 is specified to be driven by a single - ended lo, the loip and loin input pins are naturally differential. therefore, the differential lo drive from the adf4350 is more desirable. the output power from the adf4350 can be set to ? 4 dbm, ? 1 dbm,+2 dbm, and +5 dbm using register 4 bits[d2:d1] and ? 6 dbm to + 7 dbm lo d rive level for adl5375 is recommended . if the physical dista nce between the pll and the iq m odulator is significant, the filter shoul d be placed adjacent to the iq m odulator , and two 50 ? traces should be run between the devices (since there is a 50 ? impedance looking from each of the filter inputs back to each of the pll outputs ) . the adl5375 evaluation board can be reconfigured for diff erential drive and also include s component pads in its lo path to accommodate a harmonic filter. the adf4350 evaluation board can also be configu red to provide a differential output and can be connected directly to the adl5375 evaluation board. optimizing the interface between a pll lo and i/q m odulator is discussed further in cn - 0134 broadband low evm direct conversion transmitter : how to optimize the interface between a pll lo and i/q modulator. dac modulator interf acing driving the adl5375 - 05 with a t x dac? the adl5375 - 05 is designed to interface with min imal comp o nents to members of the analog devices , inc. txdac famil ies . these dual - channel differential current output dacs feature an output current swing from 0 ma to 20 ma. the interface d e scribed in this section can be used with any dac that has a simil ar output. an example of an interface using the ad9122 txdac is shown in figure 58 . the baseband inputs of the adl5375 - 05 require a dc bias of 500 m v. the nominal midscale current on each of the outputs of the ad9122 is 10 ma. therefore, a single 50 ? resis - tor to ground from each of the dac outputs results in an average current of 10 ma flowing through each of the resistors, thus producing the desired 500 mv dc bias for the inputs to the adl5375 - 05. 67 66 ibbn ibbp ad9122 adl5375-05 59 58 21 22 9 10 iout1n iout1p iout2 iout2n qbbp qbbn rbip 50? rbin 50? rbqn 50? rbqp 50? 07052- 1 12 fi gure 58 . interface between the ad9122 and adl5375 - 05 with 50 ? resistors to ground to establish the 500 mv dc bias for the adl5375 - 05 bas e band inputs the ad9122 output currents have a swing that ranges from 0 ma to 20 ma. with the 50 ? resistors in place, the ac voltage swing going into the adl5375 - 05 baseb and inputs ranges from 0 v to 1 v. a full - scale sine wave out of the ad9122 can be described as a 1 v p - p single - ended (or 2 v p - p differential) sine wave w ith a 500 mv dc bias. limiting the ac swing there are situations in which it is desirable to reduce the ac voltage swing for a given dac output current. this can be achieved through the addition of another resistor to the interface. this resistor is placed in the shunt between each side of the differential pair, as shown in figure 59 . it has the e ffect of reducing the ac swing without changing the dc bias already esta b lished by the 50 ? resistors. 67 66 ibbn ibbp ad9122 adl5375-05 59 58 iout1n iout1p iout2 iout2n qbbp qbbn rbip 50? rbin 50? rbqn 50? rbqp 50? rli 100? rlq 100? 07052- 1 13 21 22 9 10 figure 59 . ac voltage swing reduction through the introduction of a shunt resistor between differential pair
data sheet adl5375 rev. c | page 25 of 36 the value of this ac voltage swing limiting resistor is chosen based on the desired ac voltage swing. figure 60 shows the rel a tionship between the swing - limiting resistor and the peak - to - peak ac swing that it produces when 50 ? bias - setting resistors are used. the differential peak - to - peak swing at the modulator input is [ ] [ ] l b l b fs signal r r r r i v + = 2 2 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 10 100 1000 10000 differential swing (v p-p) r l ? 07052-035 figure 60 . relationship between the ac swing - limiting resistor and the peak - to - peak voltage swing with 50 ? bias - setting resistors filtering it is necessary to place an antialiasing filter between the dac and modulator to filter out nyquist images , common mode no ise, and broadband dac noise. the interface for setting up the biasing and ac swing discussed in the limiting the ac swing section lends itself well to the introduction of such a filter. the filter can be inserted between the dc bias setting resistors and the ac swing - limiting resistor. with this configuration , the dc bi a s setting resistors and the signal scaling resistors conveniently set the source and load resistances for the fi lt er . figure 61 show s a third - order, bessel low - pass filter with a 3 db frequency of 10 mhz. matching input and output impedances make the filter design easier, so the shunt resistor chosen is 100 ?, producing an ac swing of 1 v p - p differential. the fr e quency response of thi s filter is shown in figure 62. 67 66 ibbn ibbp ad9122 adl5375-05 59 58 21 22 9 10 iout1n iout1p iout2 iout2n qbbp qbbn rbip ? rbin ? rbqn ? rbqp ? rsli ? rslq ? 350.1pf c2i 350.1pf c2q 53.62pf c1i 53.62pf c1q lpi 771.1nh lni 771.1nh lnq 771.1nh lpq 771.1nh 07052- 1 14 figure 61 . dac modulator interface with 10 mhz third - order, bessel filter 1 10 100 ?60 ?50 ?40 ?30 ?20 ?10 0 0 6 12 18 24 30 36 group delay (ns) frequency (mhz) magnitude (db) magnitude group delay 07052-037 figure 62 . frequency response for dac modulator interface with 10 mhz third - order bessel filter complex if operation the adl5375 can be used with a dac , generating a complex - if (cif) , as well as a z ero - if sig nal (zif). the ? 1 db b andwidth of the adl5375 is approximately more than 400 mhz ( figure 63 and figure 64 show the b aseband f requency response of the adl5375 , facilitating h igh cif and providing sufficient flat bandwidth for d igital p redistortion (dpd) algorithms ) . using a cif places the lo leakage and the undesired sideband outside the signal band at the modulator output w here they can be easily removed with a bandpass filter. 1 0 ?1 ?2 ?3 ?4 ?5 ?6 1 10 100 1k basebane frequency response (db) baseband frequency (mhz) 07052- 1 15 figure 63 . adl5375 - 05 baseband frequency response normalized to response for 1 mhz
adl5375 data sheet rev. c | page 26 of 36 1 0 ?1 ?2 ?3 ?4 ?5 ?6 1 10 100 1k basebane frequency response (db) baseband frequency (mhz) 07052-116 figure 64. adl5375-15 baseband frequency re sponse normalized to response for 1 mhz in cif applications, a low-pass filter between the dac and modulator is still favored to filter out images, noises discussed in the filtering section as well as to preserve dc bias level from dac to adl5375-05 . figure 65 shows a fifth order butterworth filter with a 300 mhz corner frequency and the frequency response of this filter is shown in figure 66. even a purely differential filter can work well, splitting the filter capacitors into two and grounding at filter topology as like c2 and c4 in figure 65 divert common mode currents to ground and result in additional common-mode rejection of high frequency signals to a purely differential filter. 67 66 ibbn ibbp ad9122 adl5375-05 59 58 21 22 9 10 iout1n iout1p iout2 iout2n qbbp qbbn rbip 50 ? rbin 50 ? rbqn 50 ? rbqp 50 ? rsli 100 ? rslq 100 ? c3i 6pf c3q 6pf c1i 3.6pf c1q 3.6pf l1pi 33nh l1ni 33nh l2pi 33nh l2ni 33nh l1nq 33nh l1pq 33nh c2pi 22pf c2ni 22pf c4pi 3pf c4ni 3pf l2nq 33nh l2pq 33nh c2nq 22pf c2pq 22pf c4nq 3pf c4pq 3pf 07052-117 figure 65. recommended dac modulator interface topology with fc = 300 mhz fifth-orde r, butterworth filter 0 ?25 ?20 ?15 ?10 ?5 1m 500m 100m 10m magnitude (db) frequency (hz) 4.0 0 group delay (ns) 3.5 3.0 2.5 2.0 1.5 1.0 0.5 07052-118 figure 66. frequency response for dac modulator interface with 300 mhz fifth-order butterworth filter driving the adl5375-15 with a txdac the adl5375-15 requires a 1500 mv dc bias and therefore requires a slightly more complex interface that performs a dc level shift on the baseband signals. it is necessary to level-shift the dac output from a 500 mv dc bias to the 1500 mv dc bias that the adl5375-15 requires. level-shifting can be achieved with either a passive network or an active circuit. a passive network of resistors is shown in figure 67. in this network, the dc bias of the dac remains at 500 mv while the input to the adl5375-15 is 1500 mv. it should be noted that this passive level-shifting network introduces approximately 2 db of loss in the ac signal. 67 66 ibbn ibbp ad9122 adl5375-15 59 58 21 22 9 10 iout1n iout1p iout2 iout2n qbbp qbbn rbip 45.3 ? rbin 45.3 ? rbqn 45.3 ? rbqp 45.3 ? rlip 3480 ? rlin 3480 ? rlqn 3480 ? rlqp 3480 ? rsin 1k? rsip 1k? rsqn 1k? rsqp 1k? 5v 5v 07052-119 figure 67. passive level-shifting network for biasing adl5375-15 from txdac the active level shifting circuit involves the use of the ada4938 dual-differential amplifier. this device has a vocm pin that sets the output dc bias. through this pin, the output common- mode of the amplifier can be easily set to the requisite 1.5 v for biasing the adl5375-15 baseband inputs.
data sheet adl5375 rev. c | page 27 of 36 using the ad9122 dac for carrier feedthrough and unwanted sideband nulling the ad9122 features an auxiliary dacs (register 0x42, register 0x43, register 0x46, and register 0x47) or the digital dc offset adjustments (register 0x3c through register 0x3f) that can be used to null the carrier feedthrough by applying the dc offset voltage at each main dac channels. unwanted sideband suppression can be done by adjusting the i/q phase (register 0x38 through register 0x3b) and dac fs (register 0x40 and register 0x44) registers. gsm/edge operation the performance of the adl5375-05 in a multi-carriers gsm/edge environment is shown in figure 68 and figure 69. figure 68 illustrates the 6 mhz offset noise floor of the adl5375-05 at the six carriers mcgsm/edge(8-psk) operating condition vs. output power, and figure 69 demonstrates imd performance of the same six carriers mcgsm/edge(8-psk) for the adl5375-05 at 950 mhz. it is configured, as shown at figure 65, for this measurement. the ad9122 is set at ?3 db digital fs back off, f data = 368.64 msps, 2 interpolation, and pll and inverse sync off. complex if at 174.32 mhz is generated at nco of the ad9122 and fed into the adl5375-05 through a fifth order butterworth filter. special care must be taken not to be affected by the noise power of images through proper dac setup at the selection of if frequency, f data , f dac , and so on for such a low imd and noise level measurement. be sure to load clean lo signals and use equipment that allows enough dynamic range capability and noise correction feature to compensated the noise originated by equipment itself. ? 73 ?74 ?75 ?76 ?77 ?78 ?79 ?80 ?81 ?82 ?83 ?84 ?22 ?30 ?28 ?26 ?24 6mhz offset noise floor (dbc/100khz) output power (1 carrier/100khz) (dbm) ? 104.0 ?104.5 ?105.0 ?105.5 ?106.0 ?106.5 ?107.0 ?107.5 6mhz offset noise floor (dbm/100khz) 07052-120 figure 68. adl5375-05 gsm/edge(8-psk) 6 carriers 6 mhz offset noise floor at 950 mhz vs output power(1 carrier/100 khz), lo drive = 0 dbm 07052-121 figure 69. adl5375-05 gsm/edge(8-psk) 6 carriers adjacent and alternate channel power performance at 950 mhz; output power(1 carrier/100 khz) = ?24.4 dbm lo drive = 0 dbm the performance of the adl5375 in a gsm/edge environ- ment is shown in figure 70 and figure 71. figure 70 illustrates the 6 mhz offset noise of the adl5375-05 and adl5375-15 vs. output power at 940 mhz. figure 71 demonstrates how the 6 mhz offset noise is affected by variations in lo drive level for both version of the adl5375 at 940 mhz. ? 99 ?107 ?106 ?105 ?104 ?103 ?102 ?101 ?100 0 ?5 ?4 ?3 ?2 ?1 6mhz offset noise floor (dbc/100khz) output power (dbm) 07052-122 adl5375-15 adl5375-05 figure 70. gsm/edge (8-psk) 6 mhz o ffset noise at 940 mhz vs. output power, lo drive = 0 dbm
adl5375 data sheet rev. c | page 28 of 36 ?101 ?109 ?107 ?108 ?106 ?105 ?104 ?103 ?102 7 0 1 2 3 4 5 6 6mhz offset noise floor (dbc/100khz) lo drive (dbm) 07052-123 adl5375-15 adl5375-05 figure 71 . gsm/edge (8 - psk) 6 mhz offset noise at 940 mhz v s. lo drive, output p ower = 0 dbm w - cdma operation the adl 5375 is suitable for w - cdma operation. figure 72 and figure 73 show the adjacent and alternate channel power ratios for the adl5375 - 05 and adl5375 - 15, respectively , at an lo frequency of 2140 mhz. ?20 ?18 ?59 ?61 ?63 ?65 ?67 ?69 ?71 ?73 ?75 ?77 ?79 ?81 ?83 ?85 ?87 ?16 ?14 ?12 ?10 ?8 ?6 ?4 output power (dbm) adjacent and alternate channel power ratios (db) alternate cpr adjacent cpr 07052-124 figure 72 . adl5375 - 05 single - c arrier w - cdma adjacent and alternate channel power vs. output power at 2140 mhz; lo power = 0 dbm ?20 ?18 ?16 ?14 ?12 ?10 ?8 ?6 ?4 output power (dbm) adjacent and alternate channel power ratios (db) alternate cpr adjacent cpr 07052- 1 10 ?87 ?85 ?83 ?81 ?79 ?77 ?75 ?73 ?71 ?69 ?67 ?65 ?63 ?61 ?59 figur e 73 . adl5375 - 15 single - c arrier w - cdma adjacent and alternate channel power vs. output power at 2140 mhz; lo power = 0 dbm figure 72 and figure 73 show that both versions of the adl5375 are able to deliver about or better than ? 73 db acpr at an output power of ?10 dbm. figure 74 illustrate the sensitivity of the evm to variations in lo d rive at 2140 mhz for the adl5375 - 05 and adl5375 - 15. ?6 6.0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 ?4 ?2 0 2 4 6 lo drive (dbm) composite evm (%) 07052-125 adl5375-15 adl5375-05 figure 74 . single carrier w - cdma composite evm vs. lo drive at 2140 mhz; output power = ? 10 dbm the evm exhibits improvements with a l ocal f eedthrough n ulling operation.
data sheet adl5375 rev. c | page 29 of 36 lo generation using plls anal og devices has a line of plls that can be used for generating the lo s ignal. table 5 lists the plls together with thei r maximum frequency and phase noise performance. table 5 . analog devices pll selection part frequency , f in (mhz) phase noise @ 1 khz offset and 200 khz pfd (dbc/hz) adf4110 550 ? 91 @ 540 mhz adf4111 1200 ? 87 @ 900 mhz adf4112 3000 ? 90 @ 900 mhz adf4113 4000 ? 91 @ 900 mhz adf4116 550 ? 89 @ 540 mhz adf4117 1200 ? 87 @ 900 mhz adf4118 3000 ? 90 @ 900 mhz the adf 4350 is a f ractional - n pll which offers broadband operation from 137.5 mhz to 4.4 ghz and contains an integrated high performance vco. table 6 . adf4350 phase noise at various frequencies part frequency (mhz) phase noise @ 10 khz ( dbc/hz) 25 mhz pfd, 40 khz loop bw adf4350 2200 ? 97 adf4350 3300 ? 92 adf4350 4400 ? 90 transmit dac options the ad 9122 recommended in the previous sections of this data sheet is by no means the only dac that can be used to drive the adl5375 . there are other appropriate dacs, depending on the level of performance required. table 7 lists the dual txdac offered by analog devices. table 7 . dual txdac selection part resolution (bits) update rate (msps minimum) ad9709 8 125 ad9761 10 40 ad9763 10 125 ad9765 12 125 ad9767 14 125 ad9773 12 160 ad9775 14 160 ad9777 16 160 ad97 76 12 1000 ad9778 14 1000 ad9779a 16 1000 all dacs listed have nominal bias levels of 0.5 v and use the same simple dac modulator interface that is shown in figure 75. modulator/demodulato r options table 8 lists other analog devices modulators and demodulators. table 8 . modulator/demodulator options part no. modulator/ demodulator freque ncy range (mhz) comments ad8345 modulator 140 to 1000 ad8346 modulator 800 to 2500 ad8349 modulator 700 to 2700 adl5390 modulator 20 to 2400 external quadrature adl5385 modulator 50 to 2200 adl5386 modulator 50 to 2200 includes vva and agc adl5370 modulator 300 to 1000 adl5371 modulator 500 to 1500 adl5372 modulator 1500 to 2500 adl 5373 modulator 2300 to 3000 adl5374 modulator 3000 to 4000 ad8347 demodulator 800 to 2700 ad8348 demodulator 5 0 to 1000 adl5387 demodulator 50 to 2000 adl5380 demodulator 400 to 6000 adl5382 demodulator 700 to 2700 ad8340 vector modulator 700 to 1000 ad8341 vector modulator 1500 to 2400
adl5375 data sheet rev. c | page 30 of 36 evaluation board populated rohs-compliant evalua tion boards are available for evaluation of the adl5375 . the adl5375 package has an exposed paddle on the underside. this exposed paddle should be soldered to the board for good thermal and electrical grounding. the evaluation board is designed to minimize lo feedthrough to rfout through pcb by placin g lo block on the underside. and it can be configured to allow differential lo driving through balun or direct interfacing to the pll evaluation board. it also reserves component pads in its lo path to accommodate a harmonic filter. one side placem ent of baseband inputs is to interface directly to dac evaluation board. the adl5375 evaluation board also includes an rf driver amplifier. the modulator output can be measured directly at the mod_out sma connector. alternatively, by removing r1, and installing a 0 resistor in the r2 pad, the modulators output can be fed to the rf driver amplifier. the evaluation board ships, installed with an adl5320 driver amplifier (400 mhz to 2700 mhz rf driver amplifier). this device requires external matching components (c100 and c101) and is tuned by default for operation from 1805 mhz to 2170 mhz. for details on tuning component values for other frequencies, please refer to the adl5320 data sheet (the driver amplifier section of the adl5375 evaluation board is identical to the adl5320 evaluation board). for higher fr equency operation, the adl5320 should be replaced by the adl5321 , which is specified to operate from 2.3 ghz to 4 ghz. if a broa dband matched device is desired, the adl5601 (15 db) or adl5602 (20 db) broadband gain blocks can be used. vps1 rfout comm nc comm nc nc qbbn comm nc qbbp comm comm vps2 ibbn comm ibbp comm comm dsop r15 49.9 ? vpos b a loip comm loin comm 1 2 3 4 5 6 18 17 16 15 14 13 c1 100pf r12 100 ? s1 c5 0.1f c3 100pf 24 23 22 21 20 19 7 8 9 10 11 12 vpos exposed paddle adl5375 c2 100pf c4 0.1f r6 10k? qbbn qbbp loip c7 100pf r16 d.n.i loin r7 100 ? ibbn ibbp vpos red rf in rf out 1 2 (2) 3 u2 adl5320 c9 10f c10 10nf c11 22pf l1 15nh vpos_amp red c12 22pf c101 (c7) 1.5pf amp_out c100 (c3) 0.5pf 1 3 4 2 agnd dsop yellow agnd r14 0 ? r19 r18 0 ? c17 d.n.i agnd agnd agnd amp_in mod_out agnd agnd agnd agnd agnd agnd agnd vpos r13 0 ? c6 100pf t1 tc1-1-43a+** c16 d.n.i r17* 0 ? 1 6 4 3 1 2 3 45 6 t2 3600bl14m050 t2a 5400bl15b050 johanson technology** nc r21* 0 ? r20 d.n.i r22** d.n.i r2 0 ? * single-ended lo driving at loip. ** differential lo driving at loip with t1 or t2. *** adl5320 stand-alone tes t. c18 d.n.i agnd agnd agnd agnd agnd agnd agnd agnd agnd agnd agnd agnd agnd agnd gnd black d.n.i r1*** d.n.i u1 07052-126 figure 75. adl5375 evaluation board schematic
data sheet adl5375 rev. c | page 31 of 36 table 9 . evaluation board description and configuration options component description default condition/option settings vpos, gnd test points power su pply and g round test points for clip leads red = 5 v, black = gnd s1 switch , r6, r15 dsop output disable s elect position a = output enabled position b = output disabled r15 = 49.9 ? (0 603 ) r6 = 10 k ? (0 603 ) r 7, r12 ac limiting r esistors r7, r12 = 100 ? (0 603 ) c16 to c18, r14, r16, r18, r19 lo input filter components r1 4 , r 18 = 0 ? (0 603) r16, r19, c16 to c18 = open (0 603 ) c6, c7 lo d riving c apacitor c6, c7 = 100 pf (0402 ) loip sma, r17, r20, r21, r22, t1, t2, t2a single - ended local oscilla tor input r17 = 0 ? (0603) r20 = open (0402) r21 = 0 ? (0402) r22 = open (0603) t1, t2, t2a = open loin sma, r16, r17, r19, r20, optional differential lo input at loin r16, r19 = 0 ? (0 603) r21, r22, t1, t2, t2a r 20, r21 = 0 ? (0402) r17 , r22 = open (0603) t1, t2, t2a = open loip sma, t1 (or t2, t2a), r17, r20, r21, r22 optional differential lo d riving with balun at loip r17 = open (0 603 ) r 20, r21 = open (0402) r22 = 0 ? (0 603 ) t1 = tc1 - 1 - 43a+ or t 2 = 3600bl14m050 or t 2a = 5400bl15b050 c100, c101 frequency tuning capacitors for rf d river a mplifier tuning for 1805 mhz to 2170 mhz r efer to the adl5320 datasheet for the exact position according to the frequency c100 = 0.5 pf (0402) c101 = 1.5 pf (0402) c1 ac - coupling capacitor connects adl5375 rf output to mod_out rf connector or to adl5320 rf input c1 = 100 pf (0402) r1 resistor c onnects adl5375 rf output to mod_out (amp_in) sma to check adl5375 performance itself, a 0 ? should be inserted at r1 and open r2. r1 = open (0402) to check adl5320 performance itself, a 0 ? should be inserted at r1 and r2 r2 resistor connects adl5375 rf output to adl532 0 rf input r2 = 0 ? (0402) u 1 adl5375 quadrature modulator adl5375 - 05 or adl5375 - 15 u2 sot - 89 rf driver a mpl ifier adl5320 l1 dc bias inductor l 1 = 15 nh(0603) c2, c3, c4, c5, c 9, c10, c11 power supply bypassing capacitors c2, c3 = 100 p f (0402) c4, c5 = 0.1 f (0402) c 9 = 10 f ( 1206 ) c1 0 = 10 n f (0 603 ) c11 = 22 p f (0 603 ) r13 resistor to share power supply between the adl5375 and the adl5320 . to turn on the adl532 0 , a 0 ? resistor should be installed in this location. r13 = 0 ? (0603)
adl5375 data sheet rev. c | page 32 of 36 07052-127 figure 76. evaluation board layout, top layer 07052-128 figure 77. evaluation board layout, bottom layer thermal grounding and evaluation board layout the package for the adl5375 features an exposed paddle on the underside that should be well soldered to a low thermal and electrical impedance ground plane. this paddle is typically soldered to an exposed opening in the solder mask on the evaluation board. figure 78 illustrates the dimensions used in the layout of the adl5375 footprint on the adl5375 evaluation board (1 mil. = 0.0254 mm). notice the use of nine via holes on the exposed paddle. these ground vias should be connected to all other ground layers on the evaluation board to maximize heat dissipation from the device package. 07052-046 82 mil. 12 mil. 12 mil. 23 mil. 133.8 mil. 98.4 mil. 19.7 mil. 25 mil. figure 78. dimensions for eval uation board layout for the adl5375 package under these conditions, the thermal impedance of the adl5375 was measured to be approximately 30c/w in still air.
data sheet adl5375 rev. c | page 33 of 36 characterization setup mod test setup ip in qp qn out gnd vpos mod lo iout qout vpos +5v lo output 90 0 iq rohde & schwartz spectrum analyzer fsu 20hz to 8ghz i/am q/fm agilent 34401a multimeter 0.194 adc agilent e3631a power supply 5.000 0.194a com 6v 25v + ? + ? aeroflex ifr 3416 250khz to 6ghz signal generator rf out freq 1mhz level 0dbm bias 0.5v bias 0.5v gain 0.5v gain 0.5v connect to back of unit +6dbm rf in 07052-049 figure 79. characterization bench setup the primary setup used to characterize the adl5375 is shown in figure 79. this setup was used to evaluate the product as a single-sideband modulator. the aeroflex signal generator supplied the lo and differential i and q baseband signals to the device under test (dut). the typical lo drive was 0 dbm. the i-channel is driven by a sine wave, and the q-channel is driven by a cosine wave. the lower sideband is the single-sideband (ssb) output. the majority of characterization for the adl5375 was performed using a 1 mhz sine wave signal with a 500 mv ( adl5375-05 ) or 1500 mv ( adl5375-15 ) common-mode voltage applied to the baseband signals of the dut. the baseband signal path was calibrated to ensure that the v ios and v qos offsets on the baseband inputs were minimized as close as possible to 0 v before connecting to the dut. see the carrier feedthrough nulling section for the definitions of v ios and v qos .
adl5375 data sheet rev. c | page 34 of 36 mod test rack single-to-differential circuit board q in dccm agnd i in dccm vn1 vp1 i in ac q in ac vpos +5v lo 0 90 iq qp qn agilent 34401a multimeter 0.200 adc agilent e3631a power supply 5.000 0.350a com 6v 25v + ? + ? agilent e3631a power supply 0.500 0.010a com vcm = 0.5v 6v 25v + ? + ? rohde & schwartz spectrum analyzer fsu 20hz to 8ghz rf in tektronix afg3252 dual function arbitrary function generator 1mhz ampl 500mv p-p phase 0 1mhz ampl 500mv p-p phase 90 ch1 ch1 output ch2 output ch2 rf out aeroflex ifr 3416 250khz to 6ghz signal generator level 0dbm in1 in1 tsen gnd vposb vposa ip in ip in qp qn lo out output gnd vpos +5v vpos +5v ?5v mod char bd 07052-050 figure 80. setup for baseband frequency sweep and undesired sideband nulling the setup used to evaluate baseband frequency sweep and undesired sideband nulling of the adl5375 is shown in figure 80. the interface board has circuitry that converts the single-ended i input and q input from the arbitrary function generator to differential i and q baseband signals with a dc bias of 500 mv ( adl5375-05 ) or 1500 mv ( adl5375-15 ). undesired sideband nulling was achieved through an iterative process of adjusting amplitude and phase on the q-channel. see sideband suppression optimization section for a detailed description on sideband nulling.
data sheet adl5375 rev. c | page 35 of 36 outline dimensions 0.50 bsc 0.50 0.40 0.30 0.30 0.25 0.18 compliant to jedec standards mo-220-wggd. 04-12-2012- a bot t om view top view exposed pa d pin 1 indic a t or 4.10 4.00 sq 3.90 sea ting plane 0.80 0.75 0.70 0.20 ref 0.25 min coplanarity 0.08 pin 1 indic a t or 2.65 2.50 sq 2.45 1 24 7 12 13 18 19 6 for proper connection of the exposed pad, refer to the pin configuration and function descriptions section of this data sheet. 0.05 max 0.02 nom figure 81 . 24 - lead lead frame chip scale package [lfcsp_ w q] 4 mm 4 mm body , very very thin quad (cp - 24 - 7) dimensions shown in millimeters ordering guide model 1 temperature range package description package option ordering quantity adl5375 - 05acpz -r7 ? 40c to +85c 24- lead lfcsp_ w q, 7 tape and reel cp -24-7 1,500 adl5375 - 05acp z - wp ? 40c to +85c 24- lead lfcsp_ w q, waffle pack cp -24-7 64 adl5375 - 05- evalz evaluation board adl5375 - 15acpz -r7 ? 40c to +85c 24- lead lfcsp_ w q, 7 tape and reel cp -24-7 1,500 adl5375 - 15acpz - wp ? 40c to +85c 24- lead lfcsp_ w q, waffle pack cp -24-7 64 adl5375 - 15- evalz evaluation board 1 z = rohs compliant part.
adl5375 data sheet rev. c | page 36 of 36 notes ? 2007 C 2013 analog devices, inc. all rights reserved. trademarks and registered trademarks are the property of their respective owners. d07 052 - 0- 7/13(c)

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