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| ?a _______________________________ . " 9 xz? z? ^ sz ? ? ? ??w ? qq "w 3?????t???iv ?qh ??? ? z ?????????? " % $ pb{ o ???? ?3??s?u qq|???w?)?4 yb? h?z? ? e ?s`p??7 ?w q ? ?9 s c?p c4`?b{?hz0? q % " $? t?? o ? l t q t ???? ???; ? ?qom?b{ . " 9 t? ????? 7 g 7 ? ?zo;m? ?z ?? c?xa??? 7? 7 3 & ' k?mx? ?? 7 3 & ' ? 7 3 & ' wmc?t?e?p ? rpv?b{ ???q????w ?o? tb?\qt??z ???????????7 ?vthq???b{ ???? cs ??t??z ??a??3??? ??? z?? m?`?b{ z?xz!? t???u> b?h|t ??\q?z!??t3?????? 4 $ - , ?;mo7 g . c q t w sp ??\q?pv?b{ !? 4? eoc z?xz?ta?tz?wt ;m?\q?pv?b{?hz ??e??!?w ?xz ?!? ?? conv t ? b?\q?pv?b{ . " 9 x e? % * 1z??? 4 0 1 t|?????? ???-?p ?^?om?b{ ??-?3?? _____________________ ???;+ |???| ?; m?;+ ????? ? ? _______________________________ u ???z???? =x??` u 4 * / " % e # u !? t u 3?????t??w ?v " n b y u ???? ??? o u " $t| % $?7 u ?? c?a??? 7? 7 3 & ' ??? 7 3 & ' ? 7 3 & ' u ??a??3?????? z? u ?-? ? e? % * 1z 4 0 1t|???? j _______________________________ MAX195 ???z l t q tz "3????? ? " % $ ________________________________________________________________ maxim integrated products 1 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 vdda vssa agnd ain vddd sclk clk bp/up/shdn top view MAX195 ref vssd reset conv cs eoc dgnd dout dip/wide so/ceramic sb MAX195 ain ref conv sclk clk bp/up/shdn cs reset vssd dgnd vddd vdda agnd vssa dout eoc sar control logic comparator calibration dacs three-state buffer 4 6 11 16 14 15 5 7 10 8 1 9 3 2 13 12 main dac s ????3??????? ____________ e? ? ____________________________ 19-0377; rev 1; 12/97 part MAX195bcpe MAX195bcwe MAX195acde 0? to +70? 0? to +70? 0? to +70? temp. range pin-package 16 plastic dip 16 wide so 16 ceramic sb MAX195bc/d 0? to +70? dice* MAX195bepe -40? to +85? 16 plastic dip MAX195bewe -40? to +85? 16 wide so MAX195aede -40? to +85? 16 ceramic sb MAX195amde -55? to +125? 16 ceramic sb** MAX195bmde -55? to +125? 16 ceramic sb** evaluation kit available * dice are specified at t a = +25?, dc parameters only. ** contact factory for availability and processing to mil-std-883. :?????- ??; ?? ) b ?r s ???? ?? rg ???t|7 y [???3??w ? tx?3tw????]b;<^m{ i u u q x x x n b y j n j d d p n MAX195 ???z l t q tz "3????? ? " % $ 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (vddd = vdda = +5v, vssd = vssa = -5v, f clk = 1.7mhz, v ref = +5v, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. vddd to dgnd .....................................................................+7v vdda to agnd......................................................................+7v vssd to dgnd.........................................................+0.3v to -6v vssa to agnd .........................................................+0.3v to -6v vddd to vdda, vssd to vssa ..........................................?.3v ain, ref ....................................(vssa - 0.3v) to (vdda + 0.3v) agnd to dgnd ..................................................................?.3v digital inputs to dgnd...............................-0.3v, (vdda + 0.3v) digital outputs to dgnd............................-0.3v, (vdda + 0.3v) continuous power dissipation (t a = +70?) plastic dip (derate 10.53mw/? above +70?) ............842mw wide so (derate 9.52mw/? above +70?)..................762mw ceramic sb (derate 10.53mw/? above +70?)...........842mw operating temperature ranges MAX195_c_e ........................................................0? to +70? MAX195_e_e .....................................................-40? to +85? MAX195_mde..................................................-55? to +125? storage temperature range .............................-65? to +160? lead temperature (soldering, 10sec) .............................+300? MAX195a 16 (t clk ) t a = +25? t a = +25? unipolar v ref = 4.75v MAX195a MAX195b MAX195a, v ref = 4.75v vssa = -5.25v to -4.75v, v ref = 4.75v MAX195b, v ref = 4.75v vdda = 4.75v to 5.25v, v ref = 4.75v conditions mhz 1.7 f clk clock frequency (notes 3, 4) ? 9.4 t conv conversion time db -90 peak spurious noise (note 2) db -97 -90 thd total harmonic distortion (up to the 5th harmonic) (note 2) v 0v ref input range db 65 power-supply rejection ratio (vdda and vssa only) 65 ? bits 16 res resolution ppm/? 0.1 full-scale tempco %fsr unipolar full-scale error ?.0075 unipolar/bipolar offset tempco ppm/? 0.4 ?.003 %fsr ?.004 inl integral nonlinearity ? lsb ? unipolar/bipolar offset error units min typ max symbol parameter unipolar pf 250 input capacitance t a = +25? db 87 90 sinad signal-to-noise plus distortion ratio (note 2) mhz 5 f sclk serial clock frequency bipolar bipolar 125 -v ref v ref v ref = 4.75v %fsr bipolar full-scale error ?.018 MAX195b lsb ? dnl accuracy (note 1) analog input dynamic performance (f s = 85khz, bipolar range ain = -5v to +5v, 1khz) (note 1) differential nonlinearity MAX195 ???z l t q tz "3????? ? " % $ _______________________________________________________________________________________ 3 electrical characteristics (continued) (vddd = vdda = +5v, vssd = vssa = -5v, f clk = 1.7mhz, v ref = +5v, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) bp/up/ shdn = open vddd = 5.25v bp/up/ shdn = open bp/up/ shdn = 0v bp/up/ shdn = vddd digital inputs = 0 or 5v vddd = 4.75v conditions na -100 +100 bp/up/ shdn max allowed leakage, mid input v 2.75 v flt bp/up/ shdn voltage, floating v 1.5 vddd - 1.5 v im bp/up/ shdn mid input voltage ? -4.0 i il bp/up/ shdn input current, low ? 4.0 i ih bp/up/ shdn input current, high v 0.5 v il bp/up/ shdn input low voltage v 2.4 v ih clk, cs , conv , reset , sclk input high voltage v vddd - 0.5 v ih bp/up/ shdn input high voltage ? ?0 clk, cs , conv , reset , sclk input current v 0.8 v il clk, cs , conv , reset , sclk input low voltage pf 10 clk, cs , conv , reset , sclk input capacitance (note 3) units min typ max symbol parameter output low voltage v ol vddd = 4.75v, i sink = 1.6ma 0.4 v output high voltage v oh vddd = 4.75v, i source = 1ma vddd - 0.5 v dout leakage current i lkg dout = 0 or 5v ?0 ? output capacitance (note 2) 10 pf vddd 4.75 5.25 v vssd -5.25 -4.75 v vdda by supply-rejection test 4.75 5.25 v vssa by supply-rejection test -5.25 -4.75 v vddd supply current i ddd vddd = vdda = 5.25v, vssd = vssa = -5.25v 2.5 4 ma vssd supply current i ssd vddd = vdda = 5.25v, vssd = vssa = -5.25v 0.9 2 ma vdda supply current i dda vddd = vdda = 5.25v, vssd = vssa = -5.25v 3.8 5 ma vssa supply current i ssa vddd = vdda = 5.25v, vssd = vssa = -5.25v 3.8 5 ma digital inputs (clk, cs , conv , reset , sclk, bp/up/ shdn ) digital outputs (dout, eoc ) power requirements MAX195 ???z l t q tz "3????? ? " % $ 4 _______________________________________________________________________________________ vddd = vdda = 5.25v, vssd = vssa = -5.25v vddd = vdda = 5.25v, vssd = vssa = -5.25v, bp/up/ shdn = 0v vddd = vdda = 5.25v, vssd = vssa = -5.25v, bp/up/ shdn = 0v vddd = vdda = 5.25v, vssd = vssa = -5.25v, bp/up/ shdn = 0v vddd = vdda = 5.25v, vssd = vssa = -5.25v, bp/up/ shdn = 0v conditions mw 80 power dissipation ? 0.1 5 i ssa vssa shutdown supply current ? 0.1 5 i dda vdda shutdown supply current ? 1.6 5 i ddd vddd shutdown supply current (note 5) ? 0.1 5 i ssd vssd shutdown supply current units min typ max symbol parameter electrical characteristics (continued) (vddd = vdda = +5v, vssd = vssa = -5v, f clk = 1.7mhz, v ref = 5v, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) timing characteristics (vddd = vdda = +5v, vssd = vssa = -5v, unless otherwise noted.) note 1: accuracy and dynamic performance tests performed after calibration. note 2: guaranteed by design, not tested. note 3: tested with 50% duty cycle. duty cycles from 25% to 75% at 1.7mhz are acceptable. note 4: see external clock section. note 5: measured in shutdown mode with clk and sclk low. power requirements (cont.) parameter symbol conditions t a = +25? typ t a = 0? to +70? min max t a = -40? to +85? min max t a = -55? to +125? min max units conv pulse width t cw 20 30 35 ns conv to clk falling synchronization (note 2) t cc1 10 10 10 ns conv to clk rising synchronization (note 2) t cc2 40 40 ns data access time t dv c l = 50pf 80 80 40 ns bus relinquish time t dh c l = 10pf 40 40 40 ns clk to eoc high t ceh c l = 50pf 300 300 350 ns clk to eoc low t cel c l = 50pf 300 300 350 ns clk to dout valid t cd c l = 50pf 100 350 100 375 100 400 ns sclk to dout valid t sd c l = 50pf 20 140 20 160 20 160 ns cs to sclk setup time t css 75 75 75 ns cs to sclk hold time t csh -10 -10 -10 ns acquisition time t aq 2.4 2.4 2.4 ? calibration time t cal 14,000 x t clk 8.2 8.2 8.2 ms reset to clk setup time t rcs -40 -40 -40 ns reset to clk hold time t rch 120 120 120 start-up time (note 6) t su exiting shutdown 50 ns 90 ? note 6: settling time required after deasserting shutdown to achieve less than 0.1lsb additional error. ?i _______________________________ . " 9 x z ? z? 4 " 3 ?;mo??? ??? ???w??????t!?`z3??? ??????q`o z?`?b{??????x !? t $ - ,?????p ??\q?pvz!?q !?wt $ - ,q ? ?8t 4 $ - ,?? 7 g . c q t p ? ?\q?pv?b{ . " 9 x o ????? ??? ?? ?w0? q?? ???????? % " $ ? ?qom?b{??? ??q m???xz?rw??? 1 qw ? u0?t?q??ot ?-^?om?h ?z? ? ? ?? 2x\qupv?b{ . " 9 x 4 " 3q % " $w t?3????????z 4 " 3p;m? ???????z xw????3?? % " $zt|????3??q!?;w m??? ? ?qom?b{ % " $xz0?t ? ow o??tzh xw??? w??t| ???? - 4 # ??? xt?slom ?b $ {a???t??w ?? ? xz?? w? z?x " ( / % t ? ^?z z?x ?o ?? ?? " * / t ? ^??b{ ?u 4?b?qz? z?x " ( / % t? ~m^?z z?x " * /t? ~m^?z ?? ?yt z?b? ?yu?????t??? ^??b{ 7 gw???pk? . 4 #w z?x???? 3 & ' t ? ^?zf?u???t ? ^?h ? z???t? [?b{ ?tzfw ?ow ???w z?x " ( / % t ? ^?zf?u? ?? ?????t?<[?b{??? ??u 7 3 & ' tm ?z . 4 #w z?? 3 & 't ? `o? ??? ??x?tt?ts?izpb{`t `z ??w???w z??????t ? b? \qp???w ??x?????? g ?t ?xs ?z???w ??x??tzf`o? ??w z?x?ts?z . 4 #x??t ? ^??b{ ??? ??u????tm ?z??? z? x??z . 4 #x?ts??b{ tz jt gvs???u " ( / % t? ~m^?z 3 & 't ? ^?z???uw????> `? b{ ?ow???u [^???p\wu v ?b{ ?? c?u???w ?z . 4 #???x ?? ? " * /psx 3 & 't ? ^??h?z ?? c? u 7 3 & ' ? 7 3 & ' ts??b{ MAX195 ???z l t q tz "3????? ? " % $ _______________________________________________________________________________________ 5 z? ? ___________________________________________________________________ zy? y ? ;y 1 bp/up/ shdn ??? a??? 3????? ??{??a?? ??p???za???k?mx3??? ??wmc?tw ?? c?? ? r`?b{ 7 3?????z 7 a???z??a??? ???{ 2 clk !???? ?? 3 sclk 3?????? ??x!?q!?wt????3????b?h?t?;`?b{ $ - ,t 0`o ? ?8p?d pb{ 4 vddd 7???? ?o 5 dout 3?????? z? . 4 #u ? 6 dgnd ???????? 7 eoc !? 4? ????3?? z? ? {!?k?mx????3??w??t? ??????? tq u?z 4?t? ???????tq<u??b{ z?????? ??q`o??;d pb{ 8 cs ???? ?? ??a?? {3????????q??a????? z? % 0 6 5 ????`?b{ 9 conv !??? ?? ??a?? { ?? ??ubpt ??om? ?xz conv u?tslh?wq< u??p!???zf???w ?x ??w???wq<u??p!????`?b{ 10 reset ??? ??{ reset ??tb?\qt?? " % $u ???a? y 6ts??b{q u?w?p m???u???^?z????3??u??`?b{ 11 vssd 7???? ?o 12 ref ???? ?? 7? 7 13 ain ??? ?? a???w 7? 7 3 & ' x???w? 7 3 & ' 14 agnd ??????? 15 vssa 7??? ?o 16 vdda 7??? ?o MAX195 ????3?? g y $s % " $pxz o ????u? m gvxs? t?z??????w???w0?x cm y?t ?qomv?b{`t`z\?px0?w c? u?xs?bw?h?z&a $t?qpv???w a ?tx )???d?{?????x?mtx mw??t?slom?b{fw m?0? $t ????b?\qp - 4 #??w?? ??n?`o m?b{ . 4 #??w???x a t????? p?)?n?`om?b{ - 4 #???t ?^s! ? uklh ?p?z ???walt)q??)w 1x1pv??rpb{ ? ?su?z?????izpx ??? q ? a r b?\qxpv?d?{?hz9 sz ?o ?yfw w?y??w!=ti?b? q !=w4 y??o \qxpv?d?{\wh?z . " 9 px . 4 #?? w???t????3?? % " $u ?^? om?b{\??w % " $xy?? % " $ z?t0? $t ????^?os?z???? ??w ?t hl oy?? % " $w z??|???`?b{??? ?3??px . 4 #???w?)?4 yb?h ?w y`m??????u> ^?zg1^?? b{fw?xzy?? % " $w w 0 b????u ??ts?qz\wg1^?h??u & ~s??? ?3?? % " $t ??^?z? pb????w? )?4 y`?b{ . " 9 x????t ?????3??? ?m?b{??w1?0nb?h?tz??? ?3???gx?s??s??zfwalu ^??b{????3??tx? ??? ????a`?b{\?x7???? $ - , s . ) [ p n tpb{?? ??????3?? w t?z reset ??t`o . " 9 w ?^? -`z 6|??t`o????3?????b?\qu pv?b $ { ???z l t q tz "3????? ? " % $ 6 _______________________________________________________________________________________ msb ain ref agnd dummy lsb 32,768c 16,384c 4c 2c c c eoc clk reset calibration begins calibration ends MAX195 operation halts t cal t rcs t rch $ 0? q % " $w????3??????? $ ????3???? . " 9 w??|? ? 7 ? o t ? ot ?ou ????`sm ?z7 4 ?q?slh ?o ?yp ????????3??u??^?z? ??u y`x????3??^?sm\quk ??b{fw ?xz?; 2t????6|??? ?3??`o<^m reset ?? $t?tb? { % $ ^ s?-mh?tz ?o ?yz9 sz???? ?yk?mx??? ? q ?? ???? w?? t gvs!=uk? st . " 9 ?????3?? `o<^m{\??w?y??x % $|?? ?t1 ?)q?h?tz\w?os\qu ?aqs??b{ qw?ue jts? ?x\??w?y??u g ?t!=`o? g ? pb{ ????3?????x????pg1^?? h?z ^ s?-mh?t ? _t!????`h?z . " 9 u ?3?????^?h?t6|??? ?3????lh?b? ?axk??d?{`t`z 2sw????3???t ?o ?y? *?9 su gvx!=`hq?q??? ?xz6|??? ?3????o\qu * ?^??b{ ????????? ?????????e?x # 1 6 1 shdn z $ - ,z 4 $ - ,z eoc z cs z conv t| reset t?slom?b{ # 1 6 1 shdn x???? ??pb{ . " 9 w?? ? ??????t?? " * / 7 3 & ' ? 7 3 & ' tb? xz\w ?????a???t`?b{a??? ?? " * / 7? 7 3 & ' tb?x??t ? `?b{ # 1 6 1 shdn ??tb?q . " 9 x "3??? ??t??ts??b{ reset ????tb?q . " 9 w ?^u -` ?b{f`o reset wq u??p???? 3??u??^??b \w ?????3?? w ?? { conv ??tb?q!?u????b{!?u??b ?qzfw?t?r?!????x1^??b{ !? ??x $ - ,q ?8`omsz?ys??d?{?hz conv wq<u??x $ q t?b8 otsz? ys??d?{ $ - ,u?p ? m?^?oms m ?z ?8???tb?moq`o mwmouk? ?b{ m?x conv ? eoc !? p? ?b?mo pb{ m?xz!??? ???!????p??? `z $ - ,u?ww? conv u?ts???otb ?mopb $ {???w7 g ; ? ?u o t? qsm?ot`?b{ . " 9 x ? $t $ - ,w *8 ????? ??? ?;t?-`?b{ conv w c \u 2w! ?t? ? sxq? ??? $ - , ???&a`omh ?z $ - , wwq<u??p!?u???zfww $ - ,w q<u??p eoc u??ts??b $ {!? ?? w c \u 2w!?t? ??????&a`om stlh ?z!?x 2w!?w 4?t? :qo m? wq<u?????p???zfww $ - ,w q<u??p eoc u??ts??b $ { MAX195 ???z l t q tz "3????? ? " % $ _______________________________________________________________________________________ 7 track/hold clk conversion begins conversion ends t aq * * the falling edge of conv must occur in this region t cel t cw t ceh t cc2 t cc1 eoc conv $ !??? 2!?w 4?t? ?sxq? $ - ,???? MAX195 ? ???? . ) [ 7 g??? * t : w ?z!???? $ - , w??a????x ? pk??vp b{\???? * t :u ?m???w ?xz?? q?wu o t ? q??ot`?b{ y?s! ?ud s7 ??????xz ??pw9 sp x ) [z ?px l ) [pb {\w mvx? ????????w??? ?vti?`?b{ ^?tz ??pw9 spx $ - ,u n t? z ? w9 spx t? ??ty??sm?ot`o<^ m{ $ - ,u\?? ??ty?lh ?xz reset ? ? $t?t`o6????3????o ?auk??b{\?xz o ???????yt?t - ^?om? y 6 ?cu???om?d quk? h?pb{ . " 9 w???xz?t??b?v? mvt -b?\qupv?b{ * t :z??a????zt|fw ??? ??w ts??tw!=uklh ?z $ - ,q??? ?? " * /q 3 & ' w????t?lo \a?|???? !=`?b{6????3????o\qp\w|? ??x4 y^?z % $ ^ s?s ?`?b{ z???? !?alx . 4 #t? ?t?????^??buz cs u?t??^?om?w? % 0 6 5 t z?^?? b{f???wx % 0 6 5x????e??? y 6t s??b{ % 0 6 5w???? ? ?mox mk??b{ ??????u> ^?? st $ - ,?????p ? ? ?xz!? x cs ??t-j?b{!?q !?wtal? ? ? ?xz cs ??t-jsu? 4 $ - ,?7 g . ) [p ?t`?b{ 3?????????u> ^?? st ? ? ?z & 0 $u??????w???>??b $ { conv u?ts?z ?? ??u ??h?w7 sw $ - ,w q<u??p!?x????b{f???w $ - ,w q<u??p??????u % 0 6 5t?3???? ^??b{ $ - ,t? % 0 6 5?w? ????w7 g?7 t 0 b?h?txz $ - ,wq u??k?mx ??? su . ) [? w ?tzw $ - ,wq<u ??p?????????`?b{ ?itmm ox ? ?^t?? t| ? 4 1 * 5 . 2 4 1 * 5 . ????? w ?? `o<^m{ y`m!??z 2w!?t x ?? ? *8w ?t??pv?h?z!? t 3??????? ??i ?t!?????u7? ts??b{ ???z l t q tz "3????? ? " % $ 8 _______________________________________________________________________________________ track/hold clk conversion begins conversion ends t aq * * the falling edge of conv must occur in this region t cel t cw t ceh t cc2 t cc1 eoc conv $ !??? 2w!?w 4?t? $ - ,???? 4 1 * 2 4 1 *x . p u p s p m b $ p s q w ? apb{ !?q!?wt??????? ? ? ?xzw mc?t??o\qupv?b{ !? 4??p $ - ,???? :q?{ eoc ?????`o!? 4??? yb?{ eoc wq<u??pa?tz?{ . 4 #w!?alxz cs u?tslh?p`t?7 s w 4 $ - ,?w 2 qmo?????p % 0 6 5t z?^ ??\qt ??`o<^m{fw?w 4 $ - ,?t ?lo!????u?t3????^??b{ jw 4 $ - ,?u - 4 #?3????`?b{f ?? w????x??3????`?b{ MAX195 ???z l t q tz "3????? ? " % $ _______________________________________________________________________________________ 9 $ conv ????`o $ - ,q ?8 $ z????????z!? t???? ? ? t?? clk start conv MAX195 conv start clk see digital interface section cs conv clk (case 1) clk (case 2) eoc t dv t cd t cw t ceh case 1: clk idles low, data latched on rising edge (cpol = 0, cpha = 0) case 2: clk idles low, data latched on falling edge (cpol = 0, cpha = 1) note: arrows on clk transitions indicate latching edge t cel dout t dh b15 conversion begins conversion ends msb lsb b14 b13 b12 b2 b1 b0 b15 b15 from previous conversion MAX195 ???x 4 $ - ,wq<u??p?????^?? b{ 4 $ - ,t? % 0 6 5 ?w?????w7 g?7t 0 b ?h?tz 4 $ - ,wq u??p??????? ??`?b{??? su . ) [ ? wxw 4 $ - ,wq<u??p?????????`?b $ {7 gw 4 $ - ,x . ) [ pb{ ?itmmox? ?^ t??t|? 4 1 * 2 4 1 *?????w?? ` o<^m{!????u7? s . ) [ tm ?z !?w? ? o p???? ? lh ?wm uz!?q!?wp ? lh ???????? u ?xs??b ? l t q t n b y {\?xz ?????? ? . c q t p???t?do z?b?h?txz7 ? ?? ? . ) [p ??? ??? ?mu tt?t?pb{???u?????`h?zw !????? 2tz " * / w??????uxj xw? ?` ? t 4lo<^m{ rj?wmop???? ? ? ?p?z conv ?? tb?\qpx t!????b?\q?pv?`z eoc ? conv t ? b?\qp $t!?b?\q? pv?b{ $ t . " 9 w7? o ms ?^? r??` ?b{ ???z l t q tz "3????? ? " % $ 10 ______________________________________________________________________________________ MAX195 10 m f bp/up/ shdn clk sclk vddd dout dgnd reference (0v to vdda) analog input -5v eoc cs vdda vssa agnd ain conversion clock +5v ref vssd reset conv 0.1 m f 10 m f 0.1 m f 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 $ z????????z!?q!?wt???? ? ? t?? $ 7? o ms ?^t??tsz? . " 9 w? r eoc cs sclk (case 1) sclk (case 2) case 1: sclk idles low, data latched on rising edge (cpol = 0, cpha = 0) case 2: sclk idles low, data latched on falling edge (cpol = 0, cpha = 1) case 3: sclk idles high, data latched on falling edge (cpol = 1, cpha = 0) note: arrows on sclk transitions indicate latching edge dout sclk (case 3) t conv t dh t sd t dv msb lsb b15 b14 b13 b12 b3 b2 b1 b0 b11 t css t csh MAX195 ???z l t q tz "3????? ? " % $ ______________________________________________________________________________________ 11 bridge instrumentation amplifier +5v ain MAX195 vdda agnd 47 m f low esr 0.1 m f ceramic ref $ ? ^ s?????;msm zp ? & 4 3???wy? ??-?3?? ?c _________________ ???? . " 9 w???? ?y c?x 7? 7 % % "pb{ ???? ?y? ? rb? ?z . " 9 w sa ?? ?? a???t??p 7 3 . 4 z???t?? p 7 3 . 4 ???b? ?auk??b{?hz 7 3 & ' u 7 % % "? qo`?lh ?z o ?-??|??u ? v? `??z?)u \a?b{fwh?tz 7 % % "t m?????;m? ?x ??u ?apb 7 3 & ' q 7 % % "u? $t s`m ?? ?x { 7 3 & ' x ? 07 g 7 % % " 7 ? qoxmz?d?{ . " 9 u ?w q ? c4b?h?tx?w ????u ?apb{7? oas ?a exz ????u 3 & ' ??t 0`o ???e???pk ?qmo\qpb{\?x?????|??? p???`z 3 & ' ??? gvs ? & 4 3??? '? ' qf?t?s 'w???????p ?b?\qt?lo a rpv?b{ ? & 4 3? ??x t?by?t? ? pv?b{ ????xzy??!? % " $w???izp sxz????3?? % " $w????? ?` sz?ys??d?{\??w ?ow???uz ( / %q 3 & 'w?!???? * t :p?????b ?d quk??b{ ?0? q ?yx q ' ? q? \quk?z 3 & 'x??? ?? " * / qlo!? $t????^??b{ ????s?? ? rb?mw7 swa?xz ?as q ?> b?\qpb{ xw ?z\?x ?q??wpw %? :?_mz?\qts? ?b{3au y?s????? ?x ?aq` sm ??k??b{ $ w??s?w?os zp ?b? ?txz 3 & ' ??t 0`o ???e??? pk?z z $??w ?sm ?yopk?y?p? ?;pv?b{ gvs ???e????? ???;moz?????w????? t 3 & '?? `h y 6p-m\q^qpv?yz 7w ??? ?op?t?m?d?{ "? " u z q w ?????? 3 & ' ?? ?vu qw?)? \a^d? h?z 7 ?oq????wt ?? ?? smp<^m{ company capacitor factory fax [country code] usa telephone sprague 595d series, 592d series 1-603-224-1430 603-224-1961 avx tps series 1-207-283-1941 800-282-4975 sanyo os-con series, mvgx series 81-7-2070-1174 619-661-6835 nichicon pl series 1-708-843-2798 708-843-7500 MAX195 ?s " $ ^ s?)q??? / $sm? $ t?` ?b{ . " 9 w s8 ^ sx?????t?lo~ 3b ?\qupv?buz????u gvbw?h?z ?9 s c?p??s? q? ?b?\qxpv?d?{0 ?u!=`h?z jt 3 & '?? =^d?h?w? ? ?v? . " 9 ???u ?`?b{ ????w ^ swq^x??-???)? ??` ?b{????ti?b??)? - 4 #?<thq ?h?txz ?9 s c?pw ??)u q q n ?< w????u ?apb{ . " 9 x q q n ? u z q w ?????7??q`om?b{\?t??zk? s w9 s!=u \ah ?p??)? - 4 #?<thq? \qupv?b{ . " 9 w s8 ^ s?7 px |????)u?? - 4 #ts??buz ? 0 % $ ^ s u oas ?xz1???p|????4 yb? tzk?mx???? ?y??????b?\qu pv?b{ $ ws?xz s8?)^q4 yb?yz ?h9 s? qq % $ ^ s? ?`?b{ ???z l t q tz "3????? ? " % $ 12 ______________________________________________________________________________________ 14 16 15 12 MAX195 max427 agnd vssa vdda 4 4 7 6 8 6 2 2 3 max874 gnd v in comp v out 4.096v +15v -15v 47 m f low esr 0.1 m f 0.1 m f 0.1 m f 0.1 m f 1000pf 0.1 m f 0.1 m f 1k 10 w 2k ref 1n914 1n914 10 w -5v +5v $ " $ ^ s??q`h a j $s????s? $ ? ^ s???? 6 12 5 414 3 2.2 m f v in 3 8v 1 m f 10k 2.2 m f 0.1 m f 2 max6241 in out ref trim nr gnd agnd MAX195 MAX195 ???z l t q tz "3????? ? " % $ ______________________________________________________________________________________ 13 input signal 1n914 diode clamps +5v ain MAX195 -5v vssa vdda +15v -15v 10 w $ a ?yt|? ?o3?-?t 0b???? ??- 3 & 't| " * / ??- 3 & 't| " * / ??x . " 9 w ?o ?y? qsm?o t`o<^m{ q?d quk?xz??|?? ?;mo ??? ?o ?y c?t???`?b{\w mz3????|??q w ?v mv ??;m ?t $ t| zk?mx3?????|??? ? s`p?;`o<^m{ ?v mv ??;m? ?xz ?? & ~s ?? " * / x 3 & ' q????wt ?`o<^m{ \?xz ??t 0`oz?????? ?? ?vti? b? " $! ?? c \^d?buz! ?xx txj x h?z!?altx1?)q?d?{?lo? ???? ??wq\?t ? ?zo`?lh ? z\w???x ?v mv ?q?t 3 $? ????? r`z?????? ?? ?vu^?z q?)u \a?b{ ??? ?? . " 9 x z o ????? ???; ? ?b?0 ? q % " $? ?qom?b{ ????e???xa? ??t??p u z q q 'q ? z ??? t??p u z q q 'q ? pb{ ?? c? ??? ?? c?xa??? 7? 7 3 & ' x??? 7 3 & ' ? 7 3 & ' ud pb{ c?w ? rx # 1 6 1 shdn e?p?m?b ?????????? w?? {???? c?x 7? 7 % % "pb{ . " 9 w s a ???? a???t??p 7 3 . 4 z? ??t??p 7 3 . 4 ???`h p???? ?y? ? rb? ?auk??b{ ?? ?? ) bt|???? !????w *8 u ?? ?? ) b;ta po?? om?b{7?w!???px ??? *8x t ts??b{ 2w!?w 4?t? ??????? &a`om? ?z!?x conv u?tslhw ???wq<u??p????b{fopsm ?xz conv ??tb?q 2w!?t? jw ???wq<u??p!?u????b{\w mxz7 ? ?? ?u ?c ??? *8ts ?\q?- a`?b{ ?rw??-?3??px ???????u ? apb{ ?? ??u o=^?om? ?z ???? ?x!? 4? ??!? 4??psxz!??? ? p ~?q??ot`?b $ {\ob?\qt??z ???????u ?? ??w gvs? ? y!=t tb?h?wut[?b{ ????xz ?a s z? ?y!=? ?u??? 2t?^d? izw g s????? ?qomsz?ys?? d?{ ???tx0? q % " $u?? z?t ? ^?z z?t ?wz?u \a?b{????^?h ?y uz ? 4? 2t ?a c? otxj x?ot` o<^m{- `hm * t :u ?m ?xz " * /? gv s???p?b?\qpz ?y!=??r i\^ct0? q % " $? f ?pv?b $ {`t`z " $;w ?x " * /x? 3???? 7 ? . ) [ p? ? `sz?ys??d?{\w???x % " $w0? q ? y ?;^?om? " * /w????t? t 0`o? `omsz?ys?cz`t?????u xsz?ys??d? $ x { MAX195 ???z l t q tz "3????? ? " % $ 14 ______________________________________________________________________________________ max400 4 7 6 2 3 in +15v -15v 1.0 m f 0.1 m f 0.1 m f 1000pf 1k 100 w ain 1n914 1n914 +5v -5v 10 w $ . " 9 p " * /?? ? ? * t :; eoc a0 a1 clk change mux input here conversion in1 a0 a1 in2 in3 in4 out acquisition MAX195 4-to-1 mux eoc ain $ !?w??t??? ???!?`z?????q????w??- MAX195 ???z l t q tz "3????? ? " % $ ______________________________________________________________________________________ 15 max427 4 7 6 2 2 3 in +15v -15v 0.0033 m f 0.1 m f 0.1 m f elantec el2003 4 1 7 +15v -15v 0.1 m f 0.1 m f 100pf 1k 1k 1n914 1n914 +5v -5v ain 10 w $ " $ % $;w " * /??? ?????? ??????x " * /t| 3 & 't????^?? bm?wpb{!???? $ - , t| ?? ? t ??a?sfw ???? ??xz!?alw?? wj?ts??b{?? ??u???????? t ?8`om? ?xz?? ??|???u \a?b{ ? ?8 ??x ??t?????? c \^dz c \` h??w? * t r u???3??t?lo- ` hm * t : 3?t ?lox?\quk??b{ ??? ?? ??t??? * t :t 0`o ???e??? tb?\qpz???7 ?vthq?b{\???q b?tx " * /? " ( / % t?b?tzk?mx :y ??w ? ?? 3???lh??p ??????b ? ?auk??buzpv?y?m??a`o<^m{ " * /w 3?x? . ) [pb{ ?8?? !???? s ti?b?|???x . " 9 w????3??t?lo????^? ?b{`t`z ?8 ??t?lo \a?|???w g v^x ??wt?lo?s?h?z ? w??? ??? * t :u?;^?? ? sz???fw w ???? ??w? 0 $s?????u!=`h ? xz6????3????ab?wu & ~t?` ??d?{ ? ? p * t :pz . " 9 w 5 ) % e #zbs?j ????u g ?t ?^s??? ? rb?\ qpz?????? q w?=?wy\qupv?b{ ? r^?h??w ? ?? zu g psm ?z 5 ) % q u?=`?b{\w ?x s 8? r ? ??? ? ? ??;`o?)wj?? ?`?b{~c ?t ?? ?!=ti?b? q?)xz9 s :w ?m b ? ? ???;b?\qp ?npv?b{?hz ??b ?uvpk?h?t \a? q?)xz g s??b ???m??s??z- `hm * t :p?;b?\qt?lo ?npv?b $ z z { % $ ^ s % $ ^ su oas ?xz . " 9 w7 g|??? ? - 4 # ?? c?? 7p? 7 ???|???u g ?t ?^s?????;b?tzk?mx|? ????????b?\qupvz `t? ?as9 s c ?p? q?-m\qwpv??????;`o<^m{ * ?s? $ x % $t| ? * t :t &`hs???`?b{ . " 9 x|??? 7 q???? 7 ? u ? t ?xz ?y?? o 7 hz ? ?xslom?b{` t`zb ? 3? ? u ( # 8 u ?mh?z " * /? ?? ? b?\qxpv?d?{ hloz??? ???? b?\qp? * t??e???? ?x`om?b{\w g????xz w ?t?lo?? z?t?o??omom?b{\w ?x??w ????????=`?b{? 7 ?ox " * / c?? qom?h?z " * /t-??|??? ?zo<^m ? 3 & 't| " * /w ??- w?? { $ px? 3??? . " 9 p? 3???|??? ?? ?`om?b{\w??|???x " * /q ? ???? ?? 0f ? ?? ?b? ?? ?lom?b{??|???x . " 9 w???? ????w t ?lom?h?z?s % $ ^ s? ?`om?b{?hz\w???x z???e? ??u ?xz ?v ?u?mh?z " $ q ??pb{ a ?yw-wh?tz " * /x??|??p? 7w ?o ?y t???^?om?b{ . " 9 x7 g|??? ?y u 7z7 g????u 7 ?z???7u o 7 hz ?<q? q pk?h?z " $ % $;t7 &pb{ MAX195 ? 7 ?ousm ?xz . " 9 w? 7??? ?o tx $ ws?u &`om?b{ . " 9 x ? ?? c ?u7 ?? 7pb { z? ?y???? ?7sh?z 7 g 7 w???? ?y??;pv?b{|??? ?y 7 z???? 7 ? za?a???? 3? . ) [ z ? ?y?? o 7 hz sz ??? q ? ?q^d? q ?iv ?qom?b{ ?^t??t| 4 1 * 2 4 1 * ????? ,? $s mw?????t??xz3?????? u!? t ! ?^?? $ - ,u???ts?z 4 $ - ,x ?;dc tzk?mx!?q!?wt?? $t ! ?^?? 4 $ - ,u??? tt?lo [^??b{ \\pxrj?wt??? 2 4 1 * ?t??? ??b?p ?`?buz 4 1 *q???? pb{ t?? !?q??? 8 u ? \wt??pxz??????xz!? t> ^ ?? st . " 9 t? ???omv?b{ 4 $ - ,x ? ? ^?z $ - ,x!????t|3????????? q`o?;^??b{\wt??p?;b?h?t 2 4 1 * ?? . " 9 t ? `hq\?? $ t? `?b{?????? $ t?`?b{ a j $s 2 4 1 *????? ??w?tt?z ` * 0 ????;mo eoc ?1`z # 1 6 1 shdn t| reset ?? ?`om?b{ xw ` z?e?x??-? 3??t?lox ?ak??d?{?hz * 0???u sm ?x eoc w ? ? 2tb?\q?pv?b{ eoc ??xz????3?? x???? 3??w 4?? ??h?t1^?z!?w 2tx . " 9 u!? psm\q?? yb?h?t1^? ?buz3at eoc ? ?t1^d?\q?d pb{????k?mx reset ?? $t ?t`h?tz????3??3?-?? ?b?h?t 1x $ - , ???? ?`sz ?ys??d? $ {\???ab?h?wmwm oxz $ - ,????`o eoc u?ts?w?1b? \qpb{`t`z ot $ - , ???? :qo ????3??w 4?qb?\q?pv?b{ ? 7tz j7w!?u?`om?`om?\qu ??pk?yz!?w 2t eoc w y 6????b? ?a?k??d?{\?xz!?u ?sxq? $ - ,???pk?\q?? yb?\qp?qpv ?b{ ???x $ - ,wq<u??p . " 9 t???? ??^?zq u??k?mxfwwq<u ??p 1t?????b?\qupv?b{q u??p?????????b? ? 4 1 * 2 4 1 *p $ 1 0 - z $ 1 ) " w? a j . * $ 3 0 8 * 3 & 5 . ) j u b d i j ) z7 g $ - ,??xt? ????b{ \\p u $ % x . " 9 w $ - ,t? % 0 6 5 ?w? ?z u 4 % x 1w???????pb{ f = / 1 t + t clk(max) 1 2 cd sd ? ? ? ? ???z l t q tz "3????? ? " % $ 16 ______________________________________________________________________________________ MAX195 qspi gpt bp/up/shdn clk sclk eoc dout reset conv cs *oc3 sck *ic1 miso *oc2 * the use of these signals adds flexibility and functionality but is not required to implement the interface. pcs0 $ . " 9 ? 2 4 1 *?t ? !? t??? ?????? max410 4 7 6 2 3 in +5v -5v 0.1 m f 0.01 m f 22 w 510 w 0.1 m f ain $ " $ % $;w? 7??? ? 7 ??? . * $ 3 0 8 * 3 &x / b u j p o b m 4 f n j d p o e v d u p s $ p s q w ? apb{ q<u??p?????????b? ? $ 1 0 - z $ 1 ) " z $ - ,?? n b y xp? z ^??b{ 1 f clk (max) = t cd + t sd ?> ? qw tgl^?om?7 g $ - , * t :? q sm?ot`o<^m{q<u??p???? ?????b? ?z?w????? u7 ? u $ % o t ? qoxmz?d?{ 2 4 1 *x ?as $ - , ???? mw `h ??? 8 q`o ?b?\qupv?buz 4 1 *x ??? 8 tv??om?b{m??z 4 1 *w ?z!?x ? c mw ??? 8 t?slomsz?ys??d?{ ? r^?h?????pw ??? ?^w?? xz!?u n t ?<t )???os ?^t`o< ^m{\?? 5lh ?xz0? q % " $t?w? ? vp?)u \a?\quk??b{\wt????; `h . " 9 w a??? & 7??? t| . p u p s p m bw ) $ ;w ?1???u . " 9 & 7 ???t ??om?b{ t?? ? ?8??? 8 \wt??px!???? $ - , q3?????? 4 $ - , ??;`?b{3??????x!?q!?w t?????^??b{\wh?z? $ - ,?? pw7 g????x ?n^??buz??-? 3??t?lox(bs ??k??b{ 2 4 1 * ? . p u p s p m b ) $ ? . " 9 t ? `h ?w ????3???????? $ t?`?b{ $ tx????? $?z $ tx\w? r;w??? t???`?b{ MAX195 ???z l t q tz "3????? ? " % $ ______________________________________________________________________________________ 17 eoc clk t cd t dv data latched: t dh cs, conv dout b15 from previous conversion b15 b15 b2 b14 b1 b0 MAX195 qspi gpt bp/up/shdn sclk eoc dout reset conv 1.7mhz clk ic3 cs oc3 sck ic1 miso oc2 start pcs0 1.3 m s 74hc32 $ . " 9 ? 2 4 1 *?t ? !?q!?w t 4 $ - ,p????????? $ $ t?^?om?s?w????? $ t?? MAX195 ?? ???? wp ?`h?otz 0 3????; mo ???? ??? ? ?8 $ - ,t ?8^d?b{ t?? w ?q ?7tz 2 4 1 * ?x??? ?3?? t $ - ,? c \`z $ - ,?????? b?tzk?mx\\t?b?ot eoc ?1`o ????3??w??? y`sz?ys??d?{ ?hz eoc xz!?alumm ???t????b? h?t 1t????^??b{ eoc u?ts?qz ???x 2 4 1 *w7?????? . c q t p??? ??^??b{???u 8 ^?o`?qyzmm p? y`m!????b?\qupv?b{ 4 $ - ,t? % 0 6 5 ?w? u 4 % w??????7xz 3????????t mv?cq?b{ . c q t? pw 4 $ - ,??pxz???x 4 $ - ,wq<u?? p . " 9 t??????^?zwq u?? p 1t?????b?\qupv?b $ 1 0 - z $ 1 ) " {?????u . c q t ? w ?xz 4 $ - ,wq<u??p . " 9 t???????? ??`z 4 $ - ,wwq<u??p 1t??? ??b? ?auk??b $ 1 0 - z $ 1 ) " ?m ??p\???ab?\qxpv?b {?hz ?w?????u7 ? u 4 % o t ? qsm?o t`?b{t?? w $ - ,w ?q ?7tz 4 1 *w ??qslom? ?w?????fpxz 7 g 4 $ - ,??u?qpvsm\quk??b{ ?oz???z ? ?t|? 7 &s q ??qb?h?txz???q???? w ? ??u ?tslh, x??;`?b{?? ?????x * ?^?om?d?{ $ t?b?otz ?w?????x ???e??? ?ot| . " 9 p?mt ? `o<^m{???q????w ?ou ?a1?t?rom? ?xz ?^s ? p???? ?oq??? ?o? m`?b{ mw ?ow3?-?w mv ex?<wqs?pb{ 7 % % %w 2t 7 % % "?1c`?b{ 7 4 4 %w 2t 7 4 4 "?1c`?b{ 7 % % "q 7 4 4 "ubpt ob? ep " * /q 3 & '?1 c`?b{ ?ow????x . " 9 w??|? ? 7 ? o t t?^d?b{?`sm ?xz?; 2t reset ?? $t?t`oz???w ????3????? b ?auk??b{ ????w???? ?vu???????? ?s m?ot ??`z???? ?v&?x ???e??? ? ??o ??`o<^m{ n "w ?vu?t w ??e???w 1 $??????????v?? izpz? 7w?) ?yu \a?b{\?x? 7w ??-??3ap? - 4 #w?)ts??b{ ???z l t q tz "3????? ? " % $ 18 ______________________________________________________________________________________ cs clk start 588ns 239ns conversion time 4.19mhz 1.3 m s 9.4 m s17 m s* 5.1 m s 4 m s eoc sclk dout b15 b3 b2 b13 b14 b1 b0 * interrupt latency of the processor $ $ t?^?hs?w????? $ t?? MAX195 ???z l t q tz "3????? ? " % $ ______________________________________________________________________________________ 19 $ ) $ t??t| $ t?^?hs?;w . " 9 w???a??? MAX195 ???z l t q tz "3????? ? " % $ 20 ______________________________________________________________________________________ $ ) $ t??t| $ t?^?hs?;w . " 9 w???a??? v MAX195 ???z l t q tz "3????? ? " % $ ______________________________________________________________________________________ 21 ??????xz????q??? ??upv ?iz m^???ot ?-`?b{??????q ??????? ?t?????? u?t ??s m?ot`?b{??????q???????? |)^d? ?auk? ?x t|)^d?b{ " % $w? ???x 7 % % "t| 7 4 4 " ?ow? * t ??t ?pb{\??w ?oxz '??? q 'x 'w ? & 4 3?????t`o??? ?????t?`?b{ ?o????l $t ??b?h?tz???w??? ?x yx`?b{ 3????? . " 9 x # 1 6 1 shdn ??tb?\qt?lo 3?????pv?b{????;`omsm w ? ? ??? 8 8 n b y ?p ?npv?izps xz!?q!?wt y????3????? b?izpzts?w ??u ??pv?b{3??? ??u ?xzfwt ?o ?y? *?w9 su! =`om? ?? ?vz3??????t??? ???? ????3?? b? ?axk??d?{ ???u????`o????u?b ??pt ?asw ?^xz?0 ?c?)w gv^ t ?`x1^??b{ ?c?)? - 4 # qb?qz tk?y????t|??? ?? ??w6 ? u g d pb{?)? - 4 # ?<q`h ?t ?a s????x tpb{ . " 9 wg? $s ? ? ??q!? : w? $ t?`?b{\\px !????x . ) [ pz!?q!?wxpv?i z3?????b?\q?> `om?b{ . " 9 ?3?????b? 2t $ - ,?-??b{\ wz ym????? c \^dsm?ot`?b{ ym $ - ,? o t?< u o`h?z $ - ,?-?c t . " 9 ?3?????`h ?z . " 9 w o ? ????3?????tq1?)q?\quk? ?b{ $ - ,u???????? ?? p ? ?8w ? xz $ ws??;mo $ - ,???t-?o<^m{ ????t|!?w??tab??7 ?ty? ?h?tz???w3?????xz!?u 4? `o1lwt?? a???x??? u ? ^ ?h?t?lo<^m{\?p??????? ??u ?? ??t y`x ? ^??b{!?w m p3?????^?h ?z????t . " 9 x?cym!?? 4??dz ?? ?wh? t ??? $ - , ??? 4jzf?t? y`m!? ???`?b{ $ ) $ t??t| $ t?^?hs?;w . " 9 w???a??? v MAX195 ???z l t q tz "3????? ? " % $ 22 ______________________________________________________________________________________ MAX195 10 m f vddd vdda vssa vssd agnd dgnd 5v 5v 0.1 m f 0.1 m f 10 m f 10 w 10 w 10 m f 0.1 m f 0.1 m f 10 m f 100 0.01 1 10 100 1000 10,000 100,000 0.1 MAX195-fig23 conversions per second power dissipation (mw) 1 10 20 m s wake-up delay 0.25lsb error 3.2 m s wake-up delay 0.5lsb error 50 m s wake-up delay 0.01lsb error ?????? q _____________________ ? ???? ?z l t q t w????z? ???????w ? q?iv ?qh . " 9 xz " $??-?3??t| ?? rgt7 &pb{\o` h??-?3?????b?h?tz? ???!? ' ' 5 ?gu [?;mo w?? ??pw " % $w?????? * t : tz?t| ??????b?\qupv?b{ . $txz ??w?? t? " % $ ??t1c`oz| ^?h iz????!?al?g?`?b{\w??? xz????w o0u> b? ' ' 5????pr s ^??b{!??)x,? ?? * t :??w???? a q`o ?^??b{ ?? 0v; zq????? : ?? 0v; z 4 / 3 x z,? ?? * t :w 3 . 4 ?qz fw ?ow " % $ z? ??w 3 . 4 ?w zpb{ z? 3?xz % $t? " % $????w ?pt mv^ ?om?b{\?tx tpxk??d?u ? q??w r u??om?b{ hloz\w zx ?? 0v; ? 4 * / " % qzy??\q?k??b{ g? w7 ? " % $??x??=?)t? \azw? ot " % $w r t? ?{??\qupv?b{ 4 / 3 / e #{ \\pz /x r ? b??? : pb{\?t??q ?s ??? " % $p? e #? x ?d pb{ z?w ' ' 5??x^?_?s?? ?? 3?pw z???? ?`?b{ $ xz . " 9 ?;mo m .s l ) [ w?? t? l t q tp? ???`hal??`?b{ " % $w? r x???? :xz 4 / 3w?w ?ot!b?\qt?lo ????b{ / 4 / 3 {\wp 4 / 3wt??t 4 * / " % ? e ?b? qz " % $w; qw???m?ts??b{ $ tz 4 * / " % t?-?`h . " 9 w???? :?z ?? * t :w :q`o?`?b{ . " 9 w7 g?????? l t q t ?? g ?t m??????p?;b? ?xz( t? ?????m |????? z1???p b?\qp?? q ?~ 3pv?b{ . " 9 p `h xw???=`stlh ?z 7 &s ???!? ??lh ?zt| ??w ? ?? lh ???bn???? $ t?`?b{ a j )x=`sm ?u - 4 #z ? ?` h ?p - 4 #pb{ ??????w :u?lq ?sxo?mm ?xz? ?wt??t ?qy xw???????`o xw??? ???qb? ??o\qp??`halu ??? ?b{ $ ?ow?q ? ? $ !?q!?wt . " 9 ?3?????`h ?w ? ? ?? 0!? : MAX195 ???z l t q tz "3????? ? " % $ ______________________________________________________________________________________ 23 |?????q=w d???^?t ?hmoxz|?????q???? ???????w dpb{=x gv s?? ??????qmq?b hi`z-?x o m {v ??? t sw???????????? x0?t ? pvz?????u ?m ?k?mx ?????p???? rgb? ?ausm ?xz ?m?p?;pb{=wmo?q? ? xz?mw ? 0 ? qti?b? ?^s|??? ?)?wyh?tz ?c- :xw???b? ?ot`o<^m{ o ms=pk? vs??????????? pk?z|?????w?lx???? 3? t|?^d?\qtk??b{f`oz|?^?h ??w oz????w a 3???? w ? uz ???????????k?mx=t?lo ??^??b{\?t?loz a 3?t???? xz|????????sm ?q z`o ?sxs??b{|?????w?omw b :xz ??w???3???w-b????? w ?-k?mx ? ru0?ts?qmo :pb{\? xz????u? p * t :???ts??mh ?tz??|?usi?ts??????;pv? t?pb{ ck (2 x clk) j q +5v k clk bp/up/shdn ck 2 x clk 1 / 2 74hc73 q (clk) j (clock shutdown) MAX195 clock shutdown $ ?? ???????? ? ?8 $ - ,?-??s? -150 -130 -110 -90 0 5 10 20 25 40 -30 -50 -70 -10 frequency (khz) signal amplitude (db) 15 30 35 f in = 1khz f s = 85khz t a = +25? $ . " 9 w ' ' 5 ?? MAX195 ???z l t q tz "3????? ? " % $ 24 ______________________________________________________________________________________ ?? e t? m .s?? tu " % $t ??^??qz " % $w ; a : w " $ u ? q * / - uj?p????^?h z????tz ?? * t :w? e tu zq`?b{ ?? e t? 5 ) % xz ?? ??w ?ow? e tw 3 . 4 % $t?????w ?pw * t : 3? ozh i` % $ r x ?x wz,? * tw 3 . 4 ?t 0b? z pb{ \?x?<w?ot b\qupv?b{ _________________________ (v 2 2 + v 3 2 + v 4 2 + ... + v n 2 ) thd = 20log v 1 \\pz 7 x,? * t :w 3 . 4 ?z 7 ? 7 / x ? / w? e tw ?pb{ ? ?> $ ? q ww 5 ) %?7 xz h ? h w? e t??pm?b{ . " 9 p xz\w?x t ?? ?yw!=ti?b? " * / ? ??????w|? ?w!=t? \aom?b{ \o`h ?!=q % " $w0? ?x? ?? ?yt?lo != u " $ ??w ?t! ???h?`zfwalzk? s?m * t :pts?w?ui\??b $ { ?????w??????? ?????w???????xz,? * t :w 3 . 4 ?qzt gvs % $t?????w ?pw * t : 3? otk? ???? r w ? w zpb{ z\we??x ?? * t :w? e tq `oq??b{`t`z " % $u?? $t w ?t xz " % $w???? ow???e??q`ow ?q??b{ ; a : . " 9 w ; a :? $ t| $ t?`?b{a? ??t??px z????x???????z ???t??px|??????pb{ 18 0 8021 14 MAX195 fg27 output code (hexadecimal) occurrences of output code (thousands) 8024 6 2 4 8 12 16 8022 8023 8026 10 8025 8027 no averaging ideal conversion running average of 5 samples v ref = +4.5v v ain = +2.25v unipolar mode 85ksps 10 12 11 13 14 15 16 0.1 1 10 100 MAX195-26 frequency (khz) effective bits f s = 85khz t a = +25? $ xw!?wn??? =t?? ?? ?nw?l??b $ ???? : 0 ?? * t : 100 60 65 0.1 10 100 70 75 80 85 90 95 MAX195-28 frequency (khz) sinad (db) 1 f s = 85khz t a = +25?c $ 4 / ? 0 * t : MAX195 ???z l t q tz "3????? ? " % $ ______________________________________________________________________________________ 25 11 . . . 111 11 . . . 110 11 . . . 101 11 . . . 100 11 . . . 011 11 . . . 010 00 . . . 110 00 . . . 101 00 . . . 100 00 . . . 011 00 . . . 010 00 . . . 001 00 . . . 000 0v v ref - (1lsb) 11 . . . 111 11 . . . 110 11 . . . 101 10 . . . 010 10 . . . 001 10 . . . 000 01 . . . 111 01 . . . 110 00 . . . 010 00 . . . 001 00 . . . 000 -v ref v ref - (1lsb) 0v $ . " 9 wa??? ; a : $ . " 9 w??? ; a : ??? $ ________________________ 0.273" (6.93mm) 0.144" (3.66mm) eoc cs conv reset vssd ref ain agnd vssa vdda bp/up/shdn clk sclk dout dgnd vddd transistor count: 7966 substrate connected to vdda MAX195 ???z l t q tz "3????? ? " % $ 26 ______________________________________________________________________________________ ?-? _________________________________________________________________ pdipn.eps MAX195 ???z l t q tz "3????? ? " % $ ______________________________________________________________________________________ 27 ?-? v ____________________________________________________________ soicw.eps ?3tpx ? .u?3t a ?p?q^?om?s???ws?w?;tmmox y ??j?d?{s? ?????xt^? om?d?{ ?3tx 5's`ts?t|?7?!?b?vb?-y`?b{ 28 __________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 (408) 737-7600 1997 maxim integrated products is a registered trademark of maxim integrated products. MAX195 ???z l t q tz "3????? ? " % $ sbn.eps ?-? v ____________________________________________________________ ? f? n y s b ? > ?o? ?? 5 & - ' " 9 |
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