lf to 2.7ghz dual 60db trupwr detector prelimi n ar y techni cal da t a AD8364 rev . prc 1/20/2 005 in fo rmation furn is h e d by an al o g dev i ces is believed to be a ccu rate and r e liable. how e ver, no r e spons i bili ty is assumed by analog devices fo r its use, nor f o r an y i n fri n geme nt s of p a t e nt s or ot her ri g h t s o f th ird parties th at may result fro m its use . specifications subject to chan g e witho u t n o tice. no licen s e is g r an te d by implicati o n or ot he rwi s e un der a n y p a t e nt or p a t e nt r i ghts of anal og de vices. trad emarks an d registered tra d ema r ks are the proper ty of th eir respectiv e co mpan ies. one technolog y way, p.o . box 9106, norwood, ma 02062-9106, u.s.a. t e l: 781. 329. 4 700 www.analog.com fax: 781. 326. 87 03 ? 2005 analog de vices, i n c. al l r i ght s r e ser v ed . features rms measur e m ent of high cr est-f a c t or sig n als d u al channel a n d d i ff er enc e o u tputs por t s int e gr a t ed ac cur a t e ly sc ale d t e mper a t ur e s e nsor w i de d y n a mic r a nge 1 db ov er 60 db @ 2 .2 ghz 0.5 db t e mpe r a t ure - stable linear-in- db res p o n se l o w log c o nf or manc e rip p le +5v o p er a t ion a t 70 ma , C40 c t o +8 5 c small footprint 5x5 mm lfcsp package applic ati o ns w i r e less infr a s t r uc tur e p o w e r a m plifier linea r iza t ion/c o n t r o l a n t e nna v s wr monit o r de vices gain control a n d measur eme n t transmitter si gnal strength indication (tssi) dual -channel wireless infras tructure ra dios func tio n a l block di agram de c a in l a co m r pw d n in l b in h b de c b ou t b vs t b fbk b ou t n ou t p fbk a ou t a vs t a in h a ch p a vpsa co m a vpsr a c m b t em p a c m a c l p a ch p b vp sb co m b a d j b a d j a v r ef vl vl c l p b tem p c h a nne l a tr up wr ? v2i bi a s v2i ou t a ou t b 25 1 2 3 4 5 6 13 15 14 16 12 11 10 9 8 7 24 23 22 21 20 19 17 18 ch a n n e l b tr up w r ? 2 2 2 2 3 3 3 6 7 8 9 0 1 2 figure 1. functional bl ock diagra m gener a l description the AD8364 is a tr ue rms r e s p o n din g d u al c h anne l rf p o w e r m e as ur e m en t subsys t e m fo r t h e p r e c is e m e as u r em e n t and co n t r o l o f sig n al p o w e r . the f l exi b il i t y o f th e AD8364 al lo ws co mm uni c a t io ns sy stem s and inst r u m e n t a t ion, such as rf p o wer a m plif iers an d r a dio t r a n s c e i ver a g c cir c ui ts, to b e m o n i to r e d a nd co n t r o ll ed w i t h ea se . ope r a t i n g o n a s i n g l e 5v s u p p l y , ea c h cha n n e l is f u l l y sp e c if ie d fo r o p era t io n u p t o 2.7gh z , o v er a d y na mic ran g e o f 60db . the AD8364 p r o v ides acc u ra t e l y s c ale d , i n d e p e nd e n t , r m s output s of b o t h r f m e a s u r e m e n t ch a n nel s . a us ef u l m e as ur em e n t dif f er en ce b e tw e e n t h e two cha nne ls is als o made a v a i la b l e. on chi p ch a n nel ma tchi n g ma k e s t h e rms dif f er en ce o u t p u t ext r eme l y s t ab le w i t h t e m p er a t ur e and p r o c e s s va r i a t ion s . th e de vice als o i n cl udes a us ef u l t e m p er a t ur e s e n s o r w i t h a n a c c u r a t e ly s c a l e d vo lt ag e prop or t i on a l t o te m p e r a t u r e, s p e c if ie d o v er t h e de vice op era t in g t e m p er a t ure ra n g e . th e AD8364 can be us ed wi t h in p u t sig n als ha vin g rms val u es f r o m - 55db m t o +5dbm, re: 50 ? an d la rg e cr es t fac t ors wi t h n o acc u rac y deg r ad a t ion. i n teg r a t ed in t h e AD8364 a r e tw o w e l l -ma t ch e d ad8362 c h a n n e ls ( s e e ad83 62 d a t a s h e e t f o r m o r e i n f o ). enhanc em e n ts i n cl ude im p r o v e d te m p er a t ur e p e r f o r m a n c e an d r e d u c e d lo g-co nfo r ma n c e r i p p le v e rs us the ad8362. o n c h i p wide b a n d wid t h o p -a m p s a r e co nnec t e d t o ac co mm o d a t e f l exi b le co nf igur a t io n s tha t s u p p o r t ma n y sys t em s o l u tio n s. t h e devi ce ca n ea s i l y be co n f i g ur ed t o p r o v i d e th r e e r m s m e as ur em e n t s s i m u l t a n eo us l y . li n e a r - i n - d b rms m e a s ur em en t s a r e su p p l i e d a t out a a nd outb , w i t h c o n v e n ie n t ly s c a l e d sl op e of 50mv/ db . the rms dif f er en c e b e tw e e n outa a nd outb is a v a i la b l e dif f er en t i a l ly o r sin g le-ende d a t outp a nd outn . a n opt i on a l vo lt ag e a p pl i e d to vlv l prov i d e s a c o m m o n mo d e re f e re nc e l e v e l t o of f s e t outp a nd outn ab ove g r ou nd. e a c h c h a n ne l o f th e AD8364 c a n in dep e n d en tly be us ed t o co n t r o l s e p a ra t e gain con t r o l f eed back l o o p s usin g vs t a a nd vs t b . t h e dif f er en ce o u t p u t s als o p r o v ide fe e d b a ck co n t r o l w h i l e p r o v idi n g im p r o v e d t e m p era t ur e st a b i l i t y t h r o ug h ma t c he d cha n ne ls. flexi b ili t y exis ts t o us e ei t h er cha nne l as a r e fer e n c e w h i l e t h e o t h e r cha n n e l is sla v e d t h r o ug h a fe e d b a ck lo o p . rf p o w e r a m plif ier co n t r o l, v s wr m e a s ur e m en ts, a nd t r a n s c ei v e r a g c cir c ui ts b e n e f i t f r o m th i s f e a t ur e . i n co n t r o l m o d e s, th e o p posi t e po la ri ti es o f th e outp a nd out n output s a l l o w prop or t i on a l or c o m p l e me n t ar y ga in-con t r ol f u n c t i o n s, e l imi n a t in g t h e n e e d fo r a b o a r d-l e v e l s i g n - in v e r t ing a m pl if ier . f e e d b a ck pin s fbka an d f bkb allo w cus t o m lo o p r e gu la tion in sp e c ial co n t rol sys t em a p p l ic a t io n s and log-slo p e ad j u s t f l exi b i l i t y . w h e n on e channe l is s l a v e d o f f t h e o t her , co n t r o l l in g t h e v o l t a g e a t vlvl wil l ad j u s t t h e sla v e d c h a n ne l s rms v a l u e, i f a p o we r l e vel of f s e t i s de s i re d. the AD8364 is supplied in a 32 -lea d 5x5mm l f csp package, f o r the operati n g te mp erature of C40 o c to +85 o c.
preliminary technical data AD8364 rev. prc page 2 of 23 AD8364-specifications table i. (v s =vpsa = vpsb = vpsr =5v, t a =25c, chan a freq = chan b freq , vlvl = vref, vst[a,b] = out[a,b], out[p,n] = fbk[a,b], differential input via balun 1 , cw input f d 2.7ghz unless otherwise noted) parameters conditions min typ max units overall function channel a and channel b, cw sine wave input signal input interface inh[a,b] (pins 26, 31) inl[a,b] (pins 27, 30) specified frequency range lf 2.7 ghz dc common-mode voltage 2.5 v signal output interface out[a,b] (pins 15,10) small signal bandwidth c lpa = c lpb d 300pf tbd mhz slew rate c lpa = c lpb d 300pf tbd v/ p s settling time 10%-100% respon se of -45 dbm to 0 dbm modulated pulse, c lpa =c lpb =open tbd p s 100%-10% response of 0 dbm to -45 dbm modulated pulse, c lpa =c lpb =open, tbd ns wideband noise clpf = 1000pf, f spot d 100khz tbd nv/ ? hz measurement mode 450 mhz operation adja = adjb = 0 v, error referred to best fit line using linear regression @ p inh[a,b] = -40dbm & -20dbm, t a = 25 o c, balun = m/a-com mabaes0054 1 db dynamic range pins out[a,b] 67 db -40 o c < t a < +85 o c 65 db 0.5 db dynamic range -40 o c < t a < +85 o c 30 db maximum input level 1db error +15 dbm minimum input level 1db error -52 dbm slope 50 mv/db intercept -55 dbm output voltage ? high power in pins out[a,b] @ p inh[a,b] = -10dbm tbd 2.2 tbd v output voltage ? low power in pins out[a,b] @ p inh[a,b] = -40dbm tbd 0.7 tbd v temperature sensitivity deviation from out[a,b] @ 25c -40c preliminary technical data AD8364 rev. prc page 3 of 23 AD8364-specifications table i. (v s =vpsa = vpsb = vpsr =5v, t a =25c, chan a freq = chan b freq , vlvl = vref, vst[a,b] = out[a,b], out[p,n] = fbk[a,b], differential input via balun 1 , cw input f d 2.7ghz unless otherwise noted) parameters conditions min typ max units inputa to inputb isolation 30 db inputa to outb isolation inputb to outa isolation (note 1) p inhb = -50dbm, outb = outb pinhb 1 db p inha = -50dbm, outa = outa pinha 1 db tbd db input impedance inha/inla, inhb/inlb differential drive 210||0.1 : ||pf inha/inla, inhb/inlb single-ended drive tbd||tbd : ||pf input return loss with recommended balun tbd measurement mode 880mhz operation adja = adjb = 0 v, error referred to best fit line using linear regression @ p inh[a,b] = -40dbm & -20dbm, t a = 25 o c, balun = m/a-com etc 1.6-4-2-3 1 db dynamic range pins out[a,b] 59 db -40 o c < t a < +85 o c 54 db 0.5 db dynamic range -40 o c < t a < +85 o c 49 db maximum input level 1db error -2 dbm minimum input level 1db error -61 dbm slope 50 mv/db intercept -61 dbm output voltage ? high power in pins out[a,b] @ p inh[a,b] = -10dbm tbd 2.75 tbd v output voltage ? low power in pins out[a,b] @ p inh[a,b] = -40dbm tbd 1.1 tbd v temperature sensitivity deviation from out[a,b] @ 25c -40c |