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1. msop 14/16/18pulsar? adc b i t s 100 k s p s 250 k s p s 400 k s p s t o 5 0 0 k s p s 1000 k s p s adc 1 8 ad 7691 1 ad 7690 1 ad 7982 1 ad a4941 - 1 ad a4841 - x 1 6 ad 7680 ad 7685 1 ad 7686 1 ad 7980 1 ad a4941 - 1 ad 7683 ad 7687 1 ad 7688 1 a d 790 3 ad a4841 - x ad 7684 ad 7694 ad 7693 1 ad 7902 1 4 ad 7940 ad 7942 1 ad 7946 1 1 ?? ?? ?1. g n d vdd1 vdd2 2 . 5 v r ef 1 r ef 2 r ef = 2 . 5 v to 5 v adc1 i n1+ i n1? vi o 1 sd i 1 sck1 cnv1 sd o 1 vi o 1 / vi o 2 sd i 1 / sd i 2 sck1 / sck2 cnv1 / cnv2 sd o 1 adc2 i n2+ i n2? vi o 2 sd i 2 sck2 cnv2 sd o 2 sd o 2 3 -w i r e o r 4 -w i r e i n t er f ace (spi, c s, and chai n mo d es) ad7 902 0 v to vr ef 0 v to vr ef 1 175 6 - 001 r e v . a d o c u m e n t f e e d b a c k i n f o r m a tio n f u r n i s h e d b y a n a l o g d e v i c e s i s b e l i e v e d t o b e a c c u r a t e a n d r e l i a b l e . h o w e v e r , n o r e s p o n s i b i l i t y i s a ssu m e d b y a n a l o g d e v i c e s f o r i t s u s e , n o r f o r a n y i n f r i n g e m e n t s o f p a t e n t s o r o t h e r r i g h t s o f t h i r d p a r tie s t h a t m a y res u l t f r o m i t s u s e . s p e c i c a t i o n s s u b j e c t t o c h a n g e w ith o u t n o t i c e . n o l i c e n s e i s g r a n t e d b y i m p l i c a tio n o r o t h e r w i s e u n d e r a n y p a t e n t o r p a t e n t r i g h t s o f a n a l o g d e v i c e s . t r a d e m a r k s a n d reg i s t e red t r a d e m a r k s are t h e p r o p e r t y o f t h e i r r e s p e c tiv e o w n e r s . o ne t e c h nolog y w a y , p . o . bo x 910 6, n o rw o o d , m a 0 2 06 2 - 9 10 6, u. s. a . t e l : 78 1 . 3 29 . 4 70 0 ? 2 0 1 4 a n a log d e v i c e s , in c. all ri g h t s r e s e r v e d . t e c hni c a l s u ppo rt w w w . a n a log .com ???161 msps pulsar 12.0 mw adcqsop? AD7902 ? 16??? ? 1 msps? 7.0 mw (1 msps v dd1 v dd2 ) 12.0 mw (1 msps ?) 140 w (10 ksps ?) ?(inl) 1.0 lsb (?)2.5 lsb (?) ? (sinad) 91 db (1 khz) ? (thd) ? 105 db (1 khz) ?? 0 v v ref (v ref 2.4 v5.1 v?) ??? ? ada4841-x ?? 2.5 v??1.8 v/2.5 v/3 v/5 v?? ?(spi) qspi/microwire/dsp 20qsop? ??? ? 40+125 ? ? ? ? (ate) ?? ? ? AD7902???16???? (adc) adc?? (vddx)? ??16 adc???? (spi) cnvx?AD7902 in+in??? ??0 v v ref refx????(v ref ) ?????? (vddx)? ???? spi ??? sdix ? adc ?? ?????????? ? ?? viox ?1.8 v2.5 v3 v5 v ? AD790220 qsop?????40c +125c adi???????????adi???????????adi? ????
r e v . a | p a g e 2 o f 2 8 ....................................................................................................1 ? ....................................................................................................1 ?? ...........................................................................................1 ?? ...........................................................................................2 ...........................................................................................3 ? ......................................................................................5 ?? ..............................................................................6 esd .......................................................................................6 ? .....................................................................7 ? ..................................................................................8 ................................................................................................. 13 ? ........................................................................................ 14 ? ........................................................................................ 14 ? .............................................................................. 14 ? .............................................................................. 15 AD7902 ?? ? ................................................................................... 15 ?? ...................................................................... 16 ?? .......................................................................... 16 ? ........................................................................................... 17 ?? ................................................................................... 17 cs?? ...................................................................................... 18 ?? ....................................................................................... 22 ?? ........................................................................................ 24 ? ................................................................................... 24 ?? .......................................................................... 25 ? ........................................................................................ 26 AD7902 .................................................................... 26 ? ........................................................................................ 27 ? ................................................................................... 27 ?? 20147 ? ?0?a na? a.....................................................4 ??? ........................................................................... 17 20142??0 ?
2. /? ? ? ? ? 1 6 ? 2 ? i n x + ? i n x ? 0 v r e f v ? i n x + ? 0 . 1 v r e f + 0 . 1 v i n x + , in x ? ? 0 . 1 0 + 0 . 1 v ?cmrr f in = 450 k h z 6 7 d b 25c?? ?? 200 n a ? 1 6 ? 3 v r e f = 5 v ? 1 . 0 0 . 5 + 1 . 0 l sb v r e f = 2 . 5 v 0 . 8 l sb ? 3 v r e f = 5 v ? 2 . 5 1 . 0 + 2 . 5 l sb v r e f = 2 . 5 v 0 . 9 l sb ?? 3 v r e f = 5 v 0 . 7 5 l sb v r e f = 2 . 5 v 1 . 2 l sb 4 t min t max ? 0 . 0 8 0 . 012 + 0 . 0 8 % f s ? 0 . 3 ppm / c ? 4 t min t max 0 . 016 0 . 0 8 % f s 4 t min t max ? 1 . 2 5 0 . 2 5 + 1 . 2 5 m v ? 0 . 1 9 ppm / c ? 4 t min t max 0 . 2 1 . 0 m v ? 3 v d d = 2 . 5 v 5 % 0 . 1 l sb ? v io 2.3 v85c v io 3.3 v85c125c 0 1 m sp s ??? 290 n s 5 ? v r e f = 5 v 9 2 d b v r e f = 2 . 5 v 8 7 d b ? f o u t = 10 k sps 111 d b (snr) f in = 1 k h z , v r e f = 5 v 89. 5 91. 5 d b f in = 1 k h z , v r e f = 2 . 5 v 84. 5 86. 5 d b ??(sfdr) f in = 1 k h z ? 105 d b ?(thd) f in = 1 k h z ? 105 d b ?(sinad) f in = 1 k h z , v r e f = 5 v 8 9 9 1 d b f in = 1 k h z , v r e f = 2 . 5 v 8 4 8 6 d b ? f in = 1 0 k h z ? 1 1 2 d b r e v . a | p a g e 3 o f 2 8 AD7902 ?v dd = 2.5 vv io = 2.3 v5.5 vv ref = 5 vt a = ?40c+125c 1 1 vddx vioxrefx???v dd v io v ref ? 2 ?????? 3 5 v ??1 lsb = 76.3 v 2.5 v??1 lsb = 38.2 v 4 ?? ????????? 5 ??(db)??fsr ????????0.5 db?
?v dd = 2.5 vv io = 2.3 v5.5 vt a = ?40c+125c 1 3. ?? ? 2 . 4 5 . 1 v ? 1 msps v ref = 5 vadc 330 a ? ?3 db 1 0 m h z ?? v d d = 2 . 5 v 2 . 0 n s ??? v d d = 2 . 5 v 2 . 0 n s ?? v il v io > 3 v ? 0 . 3 + 0 . 3 v io v v io 3 v ? 0 . 3 + 0 . 1 v v io v v ih v io > 3 v 0 . 7 v io v io + 0 . 3 v v io 3 v 0 . 9 v io v io + 0 . 3 v i il ? 1 + 1 a i ih ? 1 + 1 a ?? ? ?? ?????? 0 v o l i s in k = 500 a 0 . 4 v v o h i sou r c e = ? 500 a v io ? 0 . 3 v ? v d d x 2 . 375 2 . 5 2 . 625 v v io x ? 2 . 3 5 . 5 v viox 1 . 8 5 . 5 v i v d d x adc 1 . 4 1 . 6 m a i v io x adc 0 . 2 0 . 4 5 m a 2, 3 v dd v io = 2.5 v25c 0 . 3 5 a 10 ksps 140 w 1 msps 12. 0 1 6 m w vddx? 1 msps 7 . 0 m w ref 3 . 3 m w vio 1 . 7 m w ?? 7 . 0 nj/ ?? 4 ? t min t max ? 4 0 + 125 c r e v . a | p a g e 4 o f 2 8 /? ? ? ? 1 ?? vddx vioxrefx????v dd v io v ref ? 2 ??? viox? 3 ??? 4 ???adi? AD7902
4. ? ? ? ??(cnv?) t c o n v 500 710 n s ?? t a c q 290 n s ?? t c y c viox2.3 v 100 0 n s cnvx(cs??) t c n v h 1 0 n s sckx(cs??) t s c k viox4.5 v 10. 5 n s viox3 v 1 2 n s viox2.7 v 1 3 n s viox2.3 v 1 5 n s sckx(??) t s c k viox4.5 v 11. 5 n s viox3 v 1 3 n s viox2.7 v 1 4 n s viox2.3 v 1 6 n s sckx??? t s c k l 4 . 5 n s sckx??? t s c k h 4 . 5 n s sckx?? t hs d o 3 n s sckx??? t d s d o viox4.5 v 9 . 5 n s viox3 v 1 1 n s viox2.7 v 1 2 n s viox2.3 v 1 4 n s cnvx sdix??sdox d15 (msb)(cs??) t e n viox3 v 1 0 n s viox2.3 v 1 5 n s cnvx sdix???sckx?sdox?(cs??) t d is 2 0 n s cnvxsdix?(cs??) t ssd ic n v 5 n s cnvxsdix?(cs??) t hs d i c n v 2 n s cnvxsckx?(??) t ssc k c n v 5 n s cnvxsckx?(??) t hs c k c n v 5 n s sckx?sdix?(??) t ssd isck 2 n s sckx?sdix?(??) t hs d i s c k 3 n s sdix??sdox??(?????) t d s d o s d i 1 5 n s ?2. ????? ?3. ??? 5 0 0 a i o l 5 0 0 a i o h 1 . 4 v to sd o x c l 2 0 p f 1 1756- 0 0 2 x% viox 1 y% viox 1 v i h 2 v i l 2 v i l 2 v i h 2 t d e l a y t d e l a y 1 for viox 3 . 0 v, x = 90 and y = 10; for viox > 3 . 0 v, x = 70 and y = 30. 2 mi n i mu m v i h and ma xi mu m v i l u sed . see spec ificat i o n s for d i gita l i n pu t s paramet er i n t abl e 3 . 1 1 7 5 6 - 003 r e v . a | p a g e 5 o f 2 8 ? ??40c+125cv dd = 2.37 v2.63 vv io = 2.3 v5.5 v ?2?3 ??? 39?41?43?45?47?49?51 AD7902
r e v. a | p a g e 6 o f 2 8 ?? 5. ? inx+inx?gnd 1 ?0.3 v v ref + 0.3 v 10 ma ?? refxvioxgnd ?0.3 v+6.0 v vddxgnd ?0.3 v+3.0 v vddxviox +3 v?6 v gnd ?0.3 v v io + 0.3 v gnd ?0.3 v v io + 0.3 v ?65c +150c 150c ?? ? (60 ) (15 ) 260c 255c 1 inx+ inx??????? ?????????2? ?? ???? Z?? ??? ???1 ????? esd esd(?) ????? ????? esd???????? esd????? AD7902
? ?4. 6. ? ? 1 ? 1 , 6 r e f 1 , r e f 2 a i ?? refx?2.4 v 5.1 v ?gnd????10 f?gnd? 2 , 7 vdd 1 , vdd2 p ? 3 , 8 i n 1 + , i n 2 + ai ?? 4 , 9 i n 1 ? , i n 2 ? a i ?? 5 , 1 0 g n d p ?? 11, 1 6 c n v 2 , c n v 1 d i ?? ? ???????????? ????????(cs??) cs??cnvx????sdox?? ???cnvx????? 12, 1 7 sdo 2 , sdo 1 d o ?? ?sckx? 13, 1 8 sc k 2 , sc k 1 d i ?? ?????? 14, 1 9 sdi 2 , sdi 1 d i ? ? ???adc???? cssdixcnvx??????? ??sdix cnvx???????? ??sdix cnvx????????? 1 5 , 2 0 vio 2 , vio 1 p / ??? ????????(2.5 v 3.3 v) 1 ai???di??do?p?? 1 2 3 4 5 6 7 8 9 1 0 2 0 1 9 1 8 1 7 1 6 1 5 1 4 1 3 1 2 1 1 v dd1 i n1+ i n1? v dd2 r ef 2 g n d r ef 1 sd i 1 sck1 sd o 1 sd i 2 vio2 cnv1 g n d i n2? i n2+ cnv2 sd o 2 sck2 vio1 ad7 902 t o p vi ew (n o t to sc a l e ) 1 1 7 56- 0 0 4 r e v . a | p a g e 7 o f 2 8 AD7902
?5. ???v ref = 5 v ?6. ???v ref = 2.5 v ?7. fft?v ref = 5 v ?8. ???v ref = 5 v ?9. ???v ref = 2.5 v ?10. fft?v ref = 2.5 v 0 6 5 5 3 6 1 6 3 8 4 3276 8 4915 2 1 . 0 ?1. 0 ?0. 8 ?0. 6 ?0. 4 ?0. 2 0 0 . 2 0 . 4 0 . 6 0 . 8 i n l (l sb ) c o d e po si t i ve i n l : +0 . 35 l sb n eg a tive i n l : ?0. 90 l sb 1 1756- 4 0 5 0 6553 6 1 638 4 3276 8 4915 2 po si t i ve i n l : +0 . 60 l sb n eg a tive i n l : ?0. 60 l sb 1 . 0 ?1. 0 ?0. 8 ?0. 6 ?0. 4 ?0. 2 0 0 . 2 0 . 4 0 . 6 0 . 8 i n l (l sb ) c o d e 1 1756- 4 0 6 0 5 0 0 1 0 0 2 0 0 3 0 0 4 0 0 0 ?180 ?160 ?140 ?120 ?100 ?80 ?60 ?40 ?20 snr (d b ) f r eq u ency (khz) f s a m p l e = 1 msps f i n = 1 0kh z snr = 91. 37d b t hd = ?10 3 . 7 d b sf dr = 104 . 5 d b si nad = 9 1 . 1 5 d b 1 1 7 5 6 - 407 1 . 0 ?1. 0 ?0. 8 ?0. 6 ?0. 4 ?0. 2 0 0 . 2 0 . 4 0 . 6 0 . 8 dnl (l sb ) c o d e 0 6 5 5 3 6 163 8 4 327 6 8 491 5 2 po si t i ve dnl : +0 . 38 l sb n eg a t i ve dnl : ?0. 42 l sb 1 175 6 - 4 0 8 1 . 0 ?1. 0 ?0. 8 ?0. 6 ?0. 4 ?0. 2 0 0 . 2 0 . 4 0 . 6 0 . 8 dnl (l sb ) c o d e 0 6 5 5 3 6 163 8 4 327 6 8 491 5 2 po si t i ve dnl : +0 . 60 l sb n eg a t i ve dnl : ? 0 . 58 l sb 1 1756- 4 0 9 0 ? 1 8 0 ? 1 6 0 ? 1 4 0 ? 1 2 0 ? 1 0 0 ? 8 0 ? 6 0 ? 4 0 ? 2 0 snr (d b ) f r eq u ency (k h z) f s a m p l e = 1 msps f i n = 1 0 k h z snr = 85. 85d b t hd = ? 103 . 0 d b sf dr = 1 05. 2 d b si nad = 8 5 . 76d b 0 500 1 0 0 2 0 0 3 0 0 4 0 0 1 1 7 5 6 - 410 r e v . a | p a g e 8 o f 2 8 ? ?v dd = 2.5 vv ref = 5.0 vv io = 3.3 vt a = 25cf sample = 1 msps f in = 10 khz AD7902
?11. ????()v ref = 5 v ?12. ????(??)v ref = 5 v ? 13. snr sinad enob ???? ?14. ????()v ref = 2.5 v ? 15. snr??? ?16. thd sfdr ???? 5 0 0 0 0 4 5 0 0 0 4 0 0 0 0 3 5 0 0 0 3 0 0 0 0 2 5 0 0 0 2 0 0 0 0 1 5 0 0 0 1 0 0 0 0 5 0 0 0 0 numb er o f o ccurrences c o d es i n h ex f a 6 c f a 6 d f a6e f a6f f a70 f a71 f a72 f a73 f a74 f a75 f a76 2 1 0 1 2 4 0 6 4 1 3 5 2 1 1 3 1 7 2 4 9 1 1 7 5 6 - 4 1 1 5 0 0 0 0 4 5 0 0 0 4 0 0 0 0 3 5 0 0 0 3 0 0 0 0 2 5 0 0 0 2 0 0 0 0 1 5 0 0 0 1 0 0 0 0 5 0 0 0 0 numb er of o ccurrences c o d es i n h ex f 8 7 c f 8 7 d f 87e f 87f f 880 f 881 f 882 f 883 f 884 f 885 1 9 3 3 9 3 3 1 8 9 0 2 8 0 5 6 2 1 7 7 1 1756- 4 1 2 1 0 0 9 8 9 6 9 4 9 2 9 0 8 8 8 6 8 4 8 2 8 0 1 6 . 0 1 2 . 0 1 2 . 5 1 3 . 0 1 3 . 5 1 4 . 0 1 4 . 5 1 5 . 0 1 5 . 5 2 . 2 5 2 . 5 0 2 . 7 5 3 . 0 0 3 . 2 5 3 . 5 0 3 . 7 5 4 . 0 0 4 . 2 5 4 . 5 0 4 . 7 5 5 . 0 0 5 . 2 5 snr, si nad (d b ) en o b (b i ts ) r ef er ence vo l t a g e (v) sn r si nad en o b 1 1 7 56- 4 1 3 5 0 0 0 0 4 5 0 0 0 4 0 0 0 0 3 5 0 0 0 3 0 0 0 0 2 5 0 0 0 2 0 0 0 0 1 5 0 0 0 1 0 0 0 0 5 0 0 0 0 numb er o f o ccurrences c o d es i n h ex 135 3 8 4 352 4 299 1 521 3 3 461 1 5 121 7 4 1 1 7 5 6 - 4 1 4 faba fabb fabc fabd fabe fabf fac0 fac1 fac2 fac3 fac4 fac5 fac6 9 4 9 3 9 2 9 1 9 0 8 9 8 8 ? 1 0 ? 9 ? 8 ? 7 ? 6 ? 5 ? 4 ? 3 ? 2 ? 1 ? 0 . 1 snr (d b ) i n pu t l evel (d b ) 1 1756- 4 1 5 ?95 ?125 ?110 ?115 ?105 ?100 ?120 2 . 2 5 5 . 2 5 r ef er ence volt a g e (v) t hd (d b ) sf dr (d b ) 2 . 7 5 3 . 2 5 3 . 7 5 4 . 2 5 4 . 7 5 t h d sf d r 1 0 0 1 0 2 1 0 4 1 0 6 1 0 8 1 1 0 1 1 2 1 1 4 1 175 6 - 4 1 6 r e v . a | p a g e 9 o f 2 8 AD7902
? 17. sinad???? ? 18. snr???? ?19. adc????? ?20. thd???? ?21. thd???? ?22. adc???? 9 1 8 0 8 1 8 2 8 3 8 4 8 5 8 6 8 7 8 8 8 9 9 0 1 k 1 0 k i n pu t f r eq u ency (h z) si nad (d b ) 1 0 0 k 1 m 1 1 7 5 6 - 4 1 7 9 2 . 5 8 9 . 5 9 0 . 0 9 0 . 5 9 1 . 0 9 1 . 5 9 2 . 0 t emperat ure ( c ) snr (d b ) ? 5 5 ? 3 5 ? 1 5 5 2 5 4 5 6 5 8 5 1 0 5 1 2 5 1 1 756- 4 1 8 1 . 4 1 . 2 1 . 0 0 . 8 0 . 6 0 . 4 0 . 2 0 curren t (ma) 2 . 425 2 . 475 su ppl y vo lta g e (v) 2 . 375 2 . 525 2 . 575 2 . 625 i v d d i r e f i v i o 1 1 7 5 6 - 0 5 0 ?90 ?92 ?94 ?96 ?98 ?100 ?102 ?104 ?106 ?108 ?110 1 k 10k i n pu t f r eq u ency (h z) t hd (d b ) 100k 1 m 1 1 7 5 6 - 4 2 0 ?100 ?105 ?110 ?115 t emperat ure ( c ) t hd (d b ) ?55 ?35 ?15 5 2 5 4 5 6 5 8 5 105 1 2 5 1 1 756- 4 2 1 1 . 6 0 0 . 2 0 . 4 0 . 6 0 . 8 1 . 0 1 . 2 1 . 4 1 0 1 0 0 sa mpl e rat e (k sps) curren t (ma) 1000 i v d d i v i o t a = 2 5 c 1 1 7 5 6 - 4 2 2 r e v . a | p a g e 1 0 o f 2 8 AD7902
?23. adc????? ?24. ???? ?25. ???? ?26. adc????? ?27. ????? ?28. ????? 1 . 4 1 . 2 1 . 0 0 . 8 0 . 6 0 . 4 0 . 2 0 curren t (ma) ? 5 5 ? 3 5 ?15 5 2 5 t emperat ure ( c ) 4 5 6 5 8 5 1 0 5 1 2 5 i v d d i r e f i v i o 1 1 756- 0 5 3 0 . 4 ? 0 . 4 ? 0 . 3 ? 0 . 2 ? 0 . 1 0 0 . 1 0 . 2 0 . 3 t emperat ure ( c ) z er o erro r (m v) ?55 ? 3 5 ?15 5 2 5 4 5 6 5 8 5 1 0 5 1 2 5 1 1 756- 4 2 4 0 . 0 5 ? 0 . 0 5 ? 0 . 0 3 ? 0 . 0 1 0 . 0 1 0 . 0 3 t emperat ure ( c ) g a i n erro r (% f s) ?55 ?35 ?15 5 2 5 4 5 6 5 8 5 1 0 5 1 2 5 1 1 7 5 6 - 4 2 5 8 7 6 5 4 3 2 1 0 curren t ( a ) ?55 ?35 ?15 5 2 5 t emper a t ure ( c ) 4 5 6 5 8 5 1 0 5 1 2 5 i v d d + i v i o 1 1 756- 0 5 4 0 . 4 ? 0 . 4 ? 0 . 3 ? 0 . 2 ? 0 . 1 0 0 . 1 0 . 2 0 . 3 t emperat ure ( c ) z er o erro r ma t ch (m v) ? 5 5 ? 3 5 ? 1 5 5 2 5 4 5 6 5 8 5 1 0 5 1 2 5 1 1 756- 4 2 7 0 . 0 1 0 ? 0 . 0 1 0 ? 0 . 0 0 5 0 0 . 0 0 5 t emperat ure ( c ) g a i n erro r ma t ch (% f s) ? 5 5 ? 3 5 ? 1 5 5 2 5 4 5 6 5 8 5 1 0 5 1 2 5 1 1 7 5 6 - 4 2 8 r e v . a | p a g e 1 1 o f 2 8 AD7902
?29. ????? ?30. ????? ?10 0 ?10 2 ?10 4 ?10 6 ?10 8 ?11 0 ?11 2 ?11 4 ?11 6 ?11 8 ?12 0 t emperat ure ( c ) channel -t o -channel i sola t ion (d b ) ?55 ?35 ?15 5 2 5 4 5 6 5 8 5 1 0 5 1 2 5 f i n = 2 0kh z 1 1 7 5 6 - 4 2 9 ?100 ?102 ?104 ?106 ?108 ?110 ?112 ?114 ?116 ?118 ?120 1 k i n pu t f r eq u ency (h z) channel -t o -channel i so l a t ion (d b ) 100k 1 m 10k 1 1 7 5 6 - 4 3 0 r e v . a | p a g e 1 2 o f 2 8 AD7902
rev. a | page 13 of 28 ? = v zer o m a x ? v z e rom i n eno b = ( sina d d b ? 1.76)/6.02 ? = log 2 ( 2 n /rms ) ?(inl) inl???????? ?????????? lsb ????? 1? lsb? ?????????(?32) ?(dnl) ? adc?? 1 lsb dnl ??? ?? ????? ? ? ???????? ? lsb??( 0 v5 v 38.1 v) ???? ? ? ???????? (mv) ??? v zeromax ? v zeromin ? ???? (mv)?? ?? ??? 1? lsb?(0 v 5 v ? 4.999886 v)???(111 ? 10?? 111 ? 11) ???? ??????? ? ?? adc?? ?? ???????? fsr max ? adc fsr min ? ??(sfdr) sfdr ?????? rms ???? (db)? (enob) enob ?????? sinad ? ???? enob ? ? ???? ??????? ?? ? ????? ?? ? (thd) thd ???? rms ?? rms ? ???(db)? ? ??? rms ????? rms ???(db)?? ?60 dbfs? ??? dnl (snr) snr ???? rms ???3 ????? rms ???(db) ? ? (sinad) sinad ???? rms ??? ????? rms ?? (db)? ?? ?????? cnvx ? ??????? ??? ????????? adc ???? ? = l o g 2 ( ) 2 n /? AD7902
rev. a | page 14 of 28 ? ? 31. adc??? ? 32. adc?? 7. ? ? ?? v ref = 5 v (?) fsr ? 1 lsb 4.999924 v ffff 1 ? + 1 lsb ? 2.5 v 8000 ? ? 1 lsb ?fsr + 1 lsb 76.3 v 0001 ?fsr 0 v 0000 2 c o m p sw i t ches c o n t r o l bus y o u t pu t c o d e c n v x c o n t r o l l o g i c sw x + l sb sw x ? l sb i n x + r ef x g n d i n x ? ms b ms b c c 4 c 2 c 1 6 , 3 8 4 c 32, 7 6 8 c c c 4 c 2 c 1 6 , 3 8 4 c 32, 7 6 8 c 1175 6 - 011 0 00 . . . 0 0 0 0 00 . . . 0 0 1 0 00 . . . 0 1 0 1 11 . . . 1 0 1 1 11 . . . 1 1 0 1 11 . . . 1 1 1 ? f s r ? f s r + 1 l s b ? f s r + 0 . 5 l s b + f s r ? 1 l s b + f s r ? 1 . 5 l s b a nal og i n p u t a d c c o d e ( s t rai g h t b i nar y ) 1 1 7 56- 0 1 2 ? AD7902 ??????? 16 adc ???? AD7902?????1,000,000 (1 msps) ???? 10 ksps??? adc ??70 w????? AD7902????????? ??????? AD7902 1.8 v 5 v???? 20 qsop ? 16 adc ad7903 ?? ? AD7902??? dac ??? adc ?31?? adc???? dac ??16????? ? ? adc????? ?swx+ swx-?gnd? ????? inx+ inx? ??????cnvx ??????????? swx+ swx-???? ?gnd????? inx+ inx? ???????? ????gnd refx? ????????(v ref /2, v ref /4 ... vre f/65,536) ? msb ?? ???????????? ???? adc?? ??? AD7902???????? ??sckx ? AD7902??32?7? 2.500076 v 8001 2.499924 v 7fff 1 ???(v in+ ? v in? v ref ? v gnd )??? 2 ???(v in+ ? v in? v gnd )??? AD7902
?33. ? ?34. ?cmrr???? ?35. ????? c p i n r ef x r i n c i n d 1 d 2 i n x + o r i n x ? g n d 1175 6 - 114 9 0 8 5 8 0 7 5 7 0 6 5 6 0 1 k 1 0 k 1 0 0 k 1 m 1 0 m f r eq u ency (h z) c mrr (d b ) 117 56- 0 4 0 ad790 2 adcx 3 -w i r e i n t er f ace 2 . 5 v v+ 1 . 8 v t o 5 v 1 0 0 n f c r e f 10 f 2 1 0 0 n f r ef x i nx+ i nx? vddx vi o x sd i x cnvx sckx sd o x g n d r ef 1 20 v+ v? 0 v t o v r e f 2 . 7 n f 4 1 see t h e volt a g e r ef er ence i n pu t sec tion f o r r ef er ence sel ec tion . 2 c r e f i s u sually a 10 f c erami c capaci t o r (x5 r ). see r ec o mmended l a yo u t in figure 5 3 . 3 see t h e dri ver a mplifier choic e sec t ion . 4 o ptio nal filter . see t h e analog in pu t s sec t ion . 117 56- 013 ada4841-1 3 r e v . a | p a g e 1 5 o f 2 8 ? ?35?????AD7902?? ? ?33?AD7902?? d1 d2?? inx+ inx? ? esd ???????(v ref ) 0.3 v ? ????????? ??130 ma? ????( ?35? ada4841-1 ??) v ref ???? ???????0.3 v?? ?? ??? inx+ inx? ???? ?????( ??) ???? (inx+ inx?) ? r in c in ?c pin ??c pin ? ??r in ??400 ??? ?D???c in ??30 pf? adc ? ????? c pin r in c in ?????? ????AD7902? ???? thd ?? ?????? ?(thd) thd??? ??? AD7902
? ? ? ? ? ? ? ? ? ? ? ? + = ? 2 2 ) ( 2 47.3 47.3 log 20 n 3db loss ne f snr 8. ?? ? ? a d a 484 1 -x ?? a d802 1 ? a d802 2 ? o p 184 ??? a d865 5 5 v? ad8605 , a d 8615 5 v?? r e v . a | p a g e 1 6 o f 2 8 ?? ?AD7902? ? ? ???? AD7902 snr ???r in c in ?AD7902??? ??( ) ?AD7902? ? 56 v rms?? snr ?? f ?3db ? AD7902 (10 mhz)??? ?()???? n ?? ( ?? 1 ?35) e n ????? nv/hz ? ???thd?AD7902? ? ?????AD7902? ?16??(0.0015% 15 ppm) ????? 0.1% 0.01%???16??? ??????? ?? AD7902??ref?? ??refx gnd???? ??? ?( ?ad8031 ad8605??? ) ref?10 f(x5r 0805?) ???? ? ??????????? ???????? adr43x?22 f (x5r1206?)????? ???2.2 f????? (? dnl)?? refx gnd?????? ?(100 nf) AD7902
? 36. psrr???? ?37. ? adc???? 9 5 9 0 8 5 8 0 7 5 7 0 6 5 6 0 psrr (d b ) 1 k 10k 100k 1 m f r eq u ency (h z) 1 1 7 56- 139 1 0 1 0 . 1 0 . 0 1 0 . 0 0 1 o peratin g curren t s (ma) 1 0 0 0 0 0 sa mpl i n g rat e (sps) 1 000 0 1 0000 0 0 i r e f i v d d i v i o 1 1 7 5 6 - 1 3 7 r e v . a | p a g e 1 7 o f 2 8 ? AD7902 ?????? (vddx) / ??? (viox) viox 1.8 v5.5 v? ??????? viox vddx ? ? AD7902 viox vddx ????? ????????? ?36? AD7902???????? ??? ?????? ()??? ?? ?AD7902????? ? cs??AD7902 spi qspi dsp ? ??AD7902?????? ?cnvx sckx sdox ???? ??????? sdix cnvx sckx sdox ??? cnvx ? (sdix) ?????? ??AD7902??? sdix ???? adc ? AD7902 ?? adc???? ??????? adc?? ???cnvx?? sdix ? sdix ???? cs?? sdix ??? ??? sdix ?? sdix cnvx ?????? ???AD7902????? ?????? ??????????? ??? ????? ? cs?? adc ?? cnvx sdix ??? (?41?45) ? ??cnvx??sckx???( ?49) AD7902
rev. a | page 18 of 28 ?38. cs??(??????)? (sdix ??) ?39. cs??(??????)?? (sdi ??) a d7 9 0 2 s d i x s d o x cnv x s c k x c o n ver t dat a i n c l k d i g i t a l h o s t v i o x 11756 - 1 1 6 sd i x = 1 t cnvh t c o n v t cyc c n v x n o i t i s i u q c a n o i t i s i u q c a t a c q t s c k t s c k l c o n ver si o n sc k x t e n t hsdo 1 2 3 1 4 1 5 1 6 t d s d o t d i s t s c k h sd o x d15 d 1 4 d 1 3 d 1 d 0 1 1756 - 216 cs?? cs??(???????) AD7902? spi ??? ?? ??38?????39? sdix ? viox ?cnvx??? cs ??? sdox ?? cnvx ???????? ?cnvx?? spi ?????????? ? cnvx ??????? ????AD7902???? cnvx ???? msb ? sdox ? sckx?sckx? ???????? sckx ????????? ????16 sckx????? cnvx????( ???) sdox ? ? AD7902
rev. a | page 19 of 28 ?40. cs??(??????)? (sdix ??) ?41. cs??(???????)?? (sdix ??) a d7 9 0 2 s d i x s d o x c n v x s c k x c o n ver t dat a i n c l k d i g i t a l h ost v i o x i r q v i o x 4 7 k 11756- 118 t c o n v t c n v h t cyc a c q u i si t i o n acq u i s i t i o n t acq t sck t s c k h t s c k l c o n ver si o n sc k x cnv x s d i x = 1 sd o x 0 d 1 d 4 1 d 5 1 d t h s d o 1 2 3 1 5 1 6 1 7 t dsdo t d i s 1175 6 - 218 cs??(??????) AD7902? spi ? ?????? ??40????41? sdix ? viox ?cnvx??? cs ??? sdox ? cnvx ?? sdox ???????? ?cnvx? spi ? cnvx ??????? ??????????? ?? ?? sdox ???? sdox ????? ???AD7902????? sckx? msb ? sckx ??????? ?? sckx ?????? ?????????17 sckx ????cnvx????( ?? ?) sdox ?? ??? adc sdox ?? ????? ????? AD7902
rev. a | page 20 of 28 ?42. cs??(??????)? ?43. cs??(??????)?? a d7 9 0 2 adc2 sd i 2 sd o 2 c n v 2 sc k 2 c o n ver t d a t a i n c l k d i g i t al h o s t c s 1 c s 2 a d7 9 0 2 adc1 sd i 1 sd o 1 c n v 1 sc k 1 1 1756- 120 t c o n v t cyc a c q u i s i t i o n acq u i si t i o n t a c q t sck t s c k h t s c k l c o n ver si o n sc k x cnv x t s s d i c n v t h s d i cnv s d o x d 1 1 5 d 1 1 3 d 1 1 4 d 1 1 d 1 0 d 2 1 5 d 2 1 4 d 2 1 d 2 0 t h s d o t e n 123 1 4 1 5 1 6 1 7 1 8 3 0 3 1 3 2 t dsdo t d i s sd i 1 ( c s1 ) sd i 2 ( c s2 ) 1 1756- 2 2 0 cs??(???????) AD7902 adc? spi ?? ???? AD7902???42????43 sdix ????cnvx???cs ??? sdox ??? cnvx ? ???????? (sdix cnvx ? ??? sdox ???) ???? sdix ? spi ? sdix ??????? ????????????? ?AD7902 ????? adc ?? sdix ?? msb sdox ?sckx? sckx ????? ??? sckx ????? ????????16 sckx? ???? sdix ???? ( ??? ) sdox ????? adc AD7902
rev. a | page 21 of 28 ?44. cs??(??????)? ?45. cs??(??????)?? a d7 9 0 2 s d i x s d o x c n v x s c k x c o n ver t dat a i n c l k d i g i t a l h o s t i r q v i o x 4 7 k c s 1 11756- 122 t c o n v t c y c a c q u i s i t i o n t s s d i c n v a c q u i si t i o n t a c q t sck t s c k h t s c k l c o n ver si o n sd i x t hsdi c n v sckx cnvx sd o x t e n d 1 5 d 1 4 d 1 d 0 t h s d o 1 2 3 1 5 1 6 1 7 t d s d o t d i s 1175 6 - 222 cs??(??????) AD7902? spi ?? ?????( ??????) ? ?? cnvx ??? ???????? cnvx ?? ??44????45? sdix ????cnvx??? cs??? sdox ? ??cnvx? ???????? (sdix cnvx ???? sdox ???) ???? sdix ? spi ? sdix ??????? ?????????????? ? sdox ???? sdox ? ????? ??AD7902????? sckx? msb ? sckx ???????? ? sckx???????? ???????17 sckx?? sdix ???? ( ??? ) sdox ? ? AD7902
rev. a | page 22 of 28 ?46. ??(????)? ?47. ??(????)?? c o n ver t dat a i n c l k d i gita l h o s t ad7 9 0 2 adc 2 sd i 2 sd o 2 cnv 2 s ck2 a d 7 9 0 2 a dc1 sd i 1 sd o 1 c n v 1 sc k 1 11756- 124 t c o n v t c y c t s s d i s c k t s c k l t sck t h s d i s c k t a c q a c q u i si t i o n t s s d i c n v acq u i si t i o n t s ckh c o n ver si o n sd o 1 = sd i 2 t hsdi c n v sc k x c n vx sd i 1 = 0 sd o 2 t e n d 1 1 5 d 1 1 4 d 1 1 3 d 2 1 5 d 2 1 4 d 2 1 3 d 2 1 d 2 0 d 1 1 5 d 1 1 4 d 1 0 d 1 1 d 1 1 d 1 0 t h s d o 123 1 5 1 6 1 7 1 4 1 8 3 0 3 1 3 2 t d s d o 11756 - 224 ?? ??(????) ??????? AD7902 adc?? ???????? ??????? ? AD7902 adc???46 ?? ??47? sdix cnvx ???? sdox ??? sckx ? ???cnvx????? ????? cnvx ?? ????????? msb sdox AD7902????? ? sckx ? ? adc sdix ???? sckx?? adc msb ?n adc?16 x n??sckx ???????? ? sckx ???????? ?AD7902??? ?? ?????? AD7902
rev. a | page 23 of 28 ?48. ??(???)? ?49. ??(???)?? c o n ver t dat a i n c l k d i g i tal h o s t a d 7 9 0 2 sd i x b sd o x b c n vx sc k x a d 790 2 b 2 0 9 7 d a a 2 0 9 7 d a sd i 1 a sd o 1 a cnvx sckx i r q ad7 902 sd i 2 a sd o 2 a cnvx a dcx adc1 adc 2 sckx n o t es 1 . dash ed l i n e d en o t ed adcs a r e w i t h i n a g i ven packag e. 2 . sd i 1 a a n d sd o 1 a r ef er t o t h e sd i 1 and sd o 1 pi n s i n a d c1 i n t h e f i r st a d 7 9 0 2 o f t h e cha i n ( ad7 9 0 2 a ) . sd i 2 a a n d sd o 2 a r ef er t o t h e sd i 2 and sd o 2 pi n s i n a d c2 o f a d 7 9 02 a . l i k ew i se, sd i x b and sd o x b r ef er t o t h e sd i x and sd o x pi n s i n b o t h a dc1 and adc2 o f t h e sec o n d ad7 9 0 2 i n t h e chai n ( ad79 0 2 b ) . 11756 - 126 t c o n v t c y c t s s d i s c k t s c k h t s c k t h s d i s c k t acq t d s d o s d i t d s d o s d i t d s d o dsi a c q u i s i t i o n t ssckcnv a c q u i s itio n t s ckl c o n v e r s i o n t h s ckcnv s ckx c n v x = s d i 1 a s d o 1 a = s d i 2 a s d o 2 a = s d i x b s d o x b t e n d a 1 1 5 d a 1 1 4 d a 1 1 3 d a 2 1 5 d a 2 1 4 d a 2 1 3 d b x 1 5 d b x 1 4 d b x 1 3 d a 2 1 d a 2 0 d a 1 1 5 d a 1 1 4 d a 1 1 d a 1 0 d b x 1 d b x 0 d a 2 1 5 d a 2 1 4 d a 1 0 d a 1 1 d a 2 0 d a 2 1 d a 1 1 4 d a 1 1 5 d a 1 1 d a 1 0 t h s d o 1 2 3 1 5 1 6 1 7 4 1 8 1 9 3 1 3 2 3 3 3 4 3 5 4 7 4 8 4 9 t d s d o t d s d o s d i t d s d o s d i 1 1756- 226 ??(???) ???????? AD7902 adc??????? ?????? ????????? ? ?AD7902 adc???48?? ?49 sdix cnvx ???? sdox ??? sckx ? ??? cnvx????? ?????? cnvx ?? ??????? adc? ? adc sdox ( ? 48 AD7902 b ?? adcx adc) ??? sdox ?? ???????? AD7902?????? ?sckx? msb ? ?? adc sdix ?? ??sckx?? adc msb ?n adc?16 x n + 1?? ?????? sckx ?? ??????? adc? ???? AD7902
?50. ??? ?51. ???? v i o 1 vio2 c o n ver t dat a i n 2 c l k d i g i t a l h o s t dat a i n 1 AD7902 adc2 sd i 2 sd o 2 cnv2 sck2 ad790 2 adc1 sd i 1 sd o 1 cnv1 sck1 1175 6 - 324 sd i x = 1 t cnv h t c o n v t c y c cnvx acq u i sition acq u i si t i o n t acq t s c k t s ckl c o n ver sion sckx t e n t h s d o 1 2 3 1 4 1 5 1 6 t d s d o t d i s t s ckh sd o 1 d15 d14 d13 d 1 d 0 sd o 2 d15 d14 d13 d 1 d 0 11756 - 316 r e v . a | p a g e 2 4 o f 2 8 ?? ? AD7902???????? ?AD7902??? ??(cnvx)??????? ???? ??????50? AD7902?????? ????? ????? adc ???15 16 sckx?( ????? ??) ?????? AD7902?????46?48??? ????? ?????? adc ??31 32 sckx?( ????? ??) ? 50?????? ??51?????cs? ? ?????????? ??????? AD7902
?52. ???? g n d vdd1 vdd2 2 . 5 v r ef 1 r ef 2 r ef = 2 . 5 v t o 5 v adc1 i n 1 + i n 1 ? vi o 1 sd i 1 sck1 cnv1 sd o 1 sd i 1 sck1 cnv1 sd o 1 sd i 2 vi o 1 vi o 2 sck2 cnv2 sd o 2 adc2 i n 2 + i n 2 ? vi o 2 sd i 2 sck2 cnv2 sd o 2 ad7 9 0 2 ph ysi cal l y i so l a t ed adcs 0 v to vr ef ada484 1 - 1 vr ef ada484 1 - 1 r r r r 1 1 756 - 146 r e v . a | p a g e 2 5 o f 2 8 ?? AD7902? adc????? ???? adc?? ???????? ?????/? ???? adc??? ? ? ? ? ??? ????? AD7902??? adc ??????? 52 ???????? ?????????? ??????? ??? ?? qsop??? AD7902
?53. AD7902???() r e f 1 v dd1 i n 1 + i n 1 ? g n d r e f 2 v dd2 i n 2 + i n 2 ? g n d v i o 1 s d i 1 s ck1 s d o 1 cnv 1 v i o 2 s d i 2 s ck2 s d o 2 cnv 2 g n d r e f r e f r e f g n d g n d g n d v d d v d d g n d v i o v i o g n d 1 1 7 5 6 - 147 r e v . a | p a g e 2 6 o f 2 8 ? AD7902???????? ????AD7902?? ????? ? ?? AD7902???? ????( cnvx?) ???????? ??pcb??? ???????????? ?y???????AD7902 ? AD7902??ref1ref2? ??????? ??????( )refx gnd ??y???? ??100 nf???? vddx viox ?AD7902????? ????? ?53???? AD7902 ?? ug-608 AD7902??? ? ( eval-AD7902sdz ) ??? ??]????pc? eval-sdp-cb1z AD7902
rev. a | page 27 of 28 ? ?54. 20??? [qsop] (rq-20) ???n?() ? ? 1 ?? ? ?? ? AD7902brqz ?40c+125c 20???[qsop] a d 7 902 b r q z - r l 7 ?40c+125c 20???[qsop] rq-20 rq-20 56 ?1,000 e v a l - a d79 0 2 s d z ? e v al-sdp-cb1z ?? 1 z = rohs? com plia n t t o jedec s t a n d a r d s m o - 137- a d c o n t r o llin g d i m e n si o n s a r e in in c hes; m i l l imet er d ime n s i o n s (in p a r en t h eses) a r e r oun d ed - o ff i n c h equ iv a l en t s f or r ef e renc e on l y a n d a r e n ot a ppropr i a t e f or use i n d esign . 2 0 1 1 1 0 1 sea ting plan e 0 . 0 1 0 ( 0 . 25) 0 . 0 0 4 ( 0 . 10) 0 . 0 1 2 ( 0 . 3 0 ) 0 . 0 0 8 ( 0 . 2 0 ) 0 . 0 2 5 ( 0 . 6 4 ) bsc 0 . 041 ( 1 . 0 4 ) r e f 0 . 0 1 0 ( 0 . 2 5 ) 0 . 0 0 6 ( 0 . 1 5 ) 0.050 (1.27) 0.016 (0.41) 0.020 (0.51) 0.010 (0.25) 8 0 c o p l a n a r it y 0.0 0 4 ( 0.10) 0 . 0 6 5 ( 1 . 6 5 ) 0 . 0 4 9 ( 1 . 2 5 ) 0 . 0 6 9 ( 1.7 5 ) 0 . 0 5 3 ( 1.3 5 ) 0.3 4 5 ( 8.7 6 ) 0.3 4 1 ( 8.6 6 ) 0.3 3 7 ( 8.5 5 ) 0 . 1 5 8 ( 4 . 0 1 ) 0 . 1 5 4 ( 3 . 9 1 ) 0 . 1 5 0 ( 3 . 8 1 ) 0 . 2 4 4 ( 6 . 20) 0 . 2 3 6 ( 5 . 99) 0 . 2 2 8 ( 5 . 79) 0 8-19 - 2008 - a AD7902
rev. a | page 28 of 28 ? ?2014 anal og de vices, inc. all rights reserve d . tr adem ar ks and registered tra d emarks are the prop ert y of their respective o wners. ) a ( 4 1 / 7 - 0 - 6sc 5 7 1 1 d AD7902

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