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asah i kas ei [ ak2 92 0 ] ms09 53-e-0 1 20 11/ 06 - 1 - AK2920 zero drift operational am plifiers feature a k 2920 is th e d u al c h an ne l cmo s op erati ona l am plifires w h i ch is avai la ble t o o u tp ut w ith v ery low i n p u t of fse t vol ta ge (+/- 1. 0 v ) and n ear zero in pu t off s et d i rft. it?s operat e d w ith v e ry sm all c u rrent co nsu m ptio ns, 8 0 0 a typ . /ch (vdd:5 . 0 v ), which is available to o p erate f u ll sw ing si gn als in out pu t. a k 2920 is a p propri a te d t o sensor pre a m p. app lica t i o ns. ? low v o l t a g e, si ng le su p p ly o p erat io n : 2. 7v - 5 .5v ? very low input offset v o ltage : +/- 1.0 v typ . ? near zero dirft over tim e and t e m p era t ure : +/- 2. 0nv/ c typ. ? full swin g outp uts t o 10 k load ? power supply current : 800 a typ . /ch (vdd: 5. 0 v , no lo ad ) ? gain ban d w idth : 2mhz ty p. ? package : tmsop8 part name cha nnel number package a k 2920t 2 tmso p8 pin location tmsop8 ( a k2920t) 2:nina 4: v s s 1:outa 8: v d d 5: p i n b 3: p i n a 7:outb 6 : ni nb a b http://
asah i kas ei [ ak2 92 0 ] ms09 53-e-0 1 20 11/ 06 - 2 - pin function descriptions pin number name i/o note) function 1 outa ao amplifier a output 2 nina ai amplifier a inverted input 3 pina ai amplifier a no inverted input 4 vss pwr power supply ground 5 pinb ai amplifier b no inverted input 6 ninb ai amplifier b inverted input 7 outb ao amplifier b output 8 vdd pwr positive power supply no te) pwr : power supply ai : an alog in pu t ao : an alo g ou tpu t absolute maximum rat i ngs vss=0v ; note parameter symbol min max units su p p ly vo ltage vdd -0 .3 6.5 v in p u t vo lt ag e v td -0 .3 vdd + 0.3 v inpu t c u rrent i in -1 0 +1 0 ma storage tem p erature ra nge t st g -5 5 1 50 c note : all vo lt age wi th r e spe c t t o grou nd warning : o p erati o n al a t or bey o nd t h ese lim its m ay result i n p erm anent da m age to th e dev i ce . n o rm al opera ti on i s no t guara nt eed at these extrem e s . recomm ended opera ting conditions parameter symbol min. typ. max. units conditions operati o ng te m perature range t a -40 85 c supp ly v o lta g e v d d 2.7 5.5 v po wer su p p ly cu rrent id d 1 0 . 8 1 . 5 ma/ch vdd=5 . 0 v ,no load *we as uum es no res p o n si bil ity for t h e usa g e bey o n d t h e co ndi ti ons in this da tash eet .
asah i kas ei [ ak2 92 0 ] ms09 53-e-0 1 20 11/ 06 - 3 - electr i cal characteristi c s ? dc charac teristi c s vdd:5 v , ta:-4 0 to 8 5 c, un less o t herw ise no ted parameter min. typ. max. units conditions input voltage offset +/- 1 +/- 10 v input voltage offset drift +/- 2 +/- 20 nv / c inpu t bi as c u rrent +/- 1 0 0 pa inpu t c o m m o n m ode ra ng e 0.0 ? vdd-0 . 2 v outp ut vo lta g e swing 0.0 3 ? vdd-0 . 0 3 v rl 10k con n e cted to vdd/2 co mm o n m o d e rej e ct io n rat i o 1 10 1 30 d b pow e r supp ly reje ct io n ra t i o 11 0 13 0 db large si gn al volta ge ga in 1 10 1 30 db rl 10k connected to vdd/2 short circuit current +/ - 50 ma output current +/ - 25 ma ? ac charac teristi c s vdd:5 v , ta:-4 0 to 8 5 c, un less o t herw ise no ted parameter min. typ. max. units conditions gai n band wi dt h 2 m h z a v : 1 v / v slew rate 1 v/ s av:1v/v inpu t v o l t a g e n o ise 25 nv rm s / hz f:1kh z 0.1 ? 10h z 0.2 vpp 0.1 ? 1h z 0.1 vpp ov erlo ad reco v e ry tim e 0 . 02 msec av :1 v/v inpu t ca pa cit a nce d i fferentia l 1.5 pf comm on mo de 12 pf maxi m u m capaci ta nce loa d s 150 p f
asah i kas ei [ ak2 92 0 ] ms09 53-e-0 1 20 11/ 06 - 4 - typic a l oper ating c h ar ac teristics ? supply cur r ent vs. tem p erature (vin:1 /2 vdd) ? sup p ly cur r ent vs. su pp l y voltag e (vin:1 /2 vdd) id d- t e m p er at u r e 0 500 1 000 1 500 2 000 2 500 - 4 0 - 2 0 0 2 0 4 06 08 0 t em p er a t u r e [ c ] idd [ a] 2. 7v 5. 0v i d d- vdd ( t a = 25 c ) 0 500 1000 1500 2000 2500 01 2 3 4 5 6 s u pp l y vo l t a ge [ v ] idd [ a]
asah i kas ei [ ak2 92 0 ] ms09 53-e-0 1 20 11/ 06 - 5 - ? output voltage vs. lo a d c u rrent ? out p u t vol t a g e v s . lo ad cu rre n t (vdd=2 . 7 v , ta=25 c) (vdd=5 v , ta=25 c) ? clos ed loop gain vs. freque ncy ? cl o s ed lo op gain v s . freq uen c y (vdd=2 . 7 v , ta=25 c) (vdd=5 v , ta=25 c) isource / isi n k - v o l / v o h 0.01 0.1 1 10 100 1000 10000 0.0 001 0.001 0.01 0.1 1 10 is o u rc e / is i n k [m a ] vol / voh [mv] source sink i s o u c e / i s ink - v o l / v o h 0.01 0.1 1 10 100 1000 10000 0 . 0001 0.001 0.01 0.1 1 10 is o u rc e / is i n k [m a ] vol / voh [mv] source sink c l os e d l oop g ain -3 0 -2 0 -1 0 0 10 20 30 40 50 60 70 1.e + 00 1.e + 01 1.e + 02 1.e + 03 1.e + 04 1.e + 05 1.e + 06 1 .e + 07 f r e q u e nc y [ h z ] c l os e d l oop ga i n [ db ] av = 100, rl = 2k ? av = 10, rl = 2k ? a v = 1 , r l = 2 k ? c l o s e d l oop g a i n -3 0 -2 0 -1 0 0 10 20 30 40 50 60 70 1.e + 00 1 . e + 01 1. e + 02 1 . e + 03 1.e + 04 1. e + 05 1. e + 06 1.e + 07 f r e qu e nc y [ h z ] c l os e d l oop g a i n [ db ] av = 100, rl = 2k a v = 10, rl = 2k av = 1 , r l = 2 k
asah i kas ei [ ak2 92 0 ] ms09 53-e-0 1 20 11/ 06 - 6 - ? open loop gain a nd p h as e vs. fre q uenc y ? o p e n l o op gai n a n d phase vs. freq u e ncy (vdd=2 . 7 v , ta=25 c) (vdd=5 v , ta=2 5 c) ? output im p e da nce vs. fre que ncy ? o u t put i m pedanc e vs . freque ncy (vdd=2 . 7 v , ta=25 c) (vdd=5 v , ta=2 5 c) o pen loop gain and phase vs. frequ e ncy -20 -10 0 10 20 30 40 50 60 70 1.e + 03 1.e+ 04 1.e + 05 1.e + 0 6 1 . e + 07 fr eq u e ncy [ h z] open loop gain [db] -180 -140 -100 -60 -20 20 60 100 140 180 p h as e [degrees ] gain phase o p en l oop ga in a nd pha s e v s . fr equ e ncy -20 -10 0 10 20 30 40 50 60 70 1.e + 03 1.e + 04 1.e + 05 1.e + 06 1.e + 07 fr equ e ncy [ h z] open loop gain [db] -180 -140 -100 -60 -20 20 60 100 140 180 p h as e [degrees ] gain phase o u t p u t i m pe da nce vs . fr equ e nc y 0 50 100 150 200 250 300 1. e + 01 1. e + 0 2 1. e + 0 3 1. e + 0 4 1. e + 05 1. e + 06 1. e + 07 fr equ e ncy [ h z] output impedance[ ] av=1 av=10 av=100 o u t p u t i m pe da nce vs . f requenc y 0 50 100 150 200 250 1. e + 0 1 1. e + 02 1. e + 03 1. e + 04 1. e + 05 1. e + 06 1. e + 07 fr equ e ncy [ h z] output impedance [ ] av=1 av=10 av=100 output impedance[ ] output impedance[ ]
asah i kas ei [ ak2 92 0 ] ms09 53-e-0 1 20 11/ 06 - 7 - ? large signa l trans i e n t res p onse ? larg e si gna l tra n sie n t respons e (vdd/v ss = +1 .3 5 v /- 1 . 35v, (vdd/vss = +2.5 v/-2.5 v ta = 25c, cl = 150pf) ta = 25 c, cl = 150pf) ? sm all signa l trans i e n t res p onse ? sm all si gna l tra n sie n t respons e (vdd/v ss = +1 .3 5 v /- 1 . 35v, (vdd/vss = +2.5 v/-2.5 v ta = 25c, cl = 150pf) ta = 25 c, cl = 150pf) large sig n al tr an s i en t r e s p o n s e -2 -1 . 5 -1 -0 . 5 0 0. 5 1 1. 5 2 ti m e (4 se c / d i v) output voltage (0.5v/div) l a r g e s i g n al tan s ien t r e s p o n s -4 -3 -2 -1 0 1 2 3 4 ti m e (4 s / div) output voltage (1v/div) s m al l s i gn al t r ansi e n t r e spo n s e -0 . 2 -0. 1 5 -0 . 1 -0. 0 5 0 0. 0 5 0.1 0. 1 5 0.2 ti m e ( 4 s /div) output voltage ( 50mv/di v) s m al l s i gn al t ransine t r e spo n s e -0 . 2 -0. 1 5 -0 . 1 -0. 0 5 0 0. 0 5 0.1 0. 1 5 0.2 ti m e ( 4 s / div) output voltage ( 50mv/di v)
asah i kas ei [ ak2 92 0 ] ms09 53-e-0 1 20 11/ 06 - 8 - ? s m a l l s i g n a l o v e r s h o o t v s . l o a d c a p a c i t a n c e ? sm all signa l o v ersho o t vs. l o ad ca pacitan ce (vdd=2 . 7 v , ta=25 c) (vdd=5 v , ta=2 5 c) ? positive overvolta ge rec o very ? negat i ve ov ervo l t ag e reco very ( vdd/vss = +2.5v/-2.5v, ta = 25 c) ( vdd/vss = +2.5v/-2.5v, ta = 25 c) small s i gna l o v er s h oot vs . l o a d c a pa ci t a nce 0 10 20 30 40 50 1.e+ 00 1.e + 01 1.e + 02 1.e + 03 1.e + 04 l o a d ca pa ci t a nce [ p f ] overshoot [%] os+ os- s m a l l s i g n a l ove r s h o o t vs . l o a d c a p a c i t a n c e 0 10 20 30 40 50 1.e + 00 1 . e + 0 1 1.e + 02 1.e + 0 3 1.e + 04 l o a d ca p a ci ta n ce [ p f ] over shoot [ %] os+ os- positiv e o v e r v o lta g e re cover y vo l t a g e [ v ] av = - 5 0 rl = 10k ch 1 = 1v/div ch2 = 50m v / d i v time ( 10 sec/div ) ne g a t i v e o v e r v o l t ag e r e co v e ry time (10 sec/div) av = - 5 0 rl = 10k ch1 = 1v/div ch2 = 50 m v / d i v v o l t age [ v ]
asah i kas ei [ ak2 92 0 ] ms09 53-e-0 1 20 11/ 06 - 9 - ? com m on mod e r e je cti on rat i o vs. f r eque ncy ? p o w e r s u p p l y r e j e c t i o n r a t i o v s . f r e q u e n c y ? pow e r sup p ly rej ect io n rati o vs . freq uenc y (vdd=2 . 7 v , ta=25 c) (vdd=5 v , ta=2 5 c) cm rr 0 20 40 60 80 100 120 1.e+ 00 1.e + 01 1.e + 02 1.e + 03 1.e + 04 1.e + 05 f r equ e ncy [ h z] cmrr [db] 2.7v 5.0v psr r 0 20 40 60 80 100 120 140 1.e + 00 1.e + 01 1.e + 02 1.e + 03 1.e + 04 1 . e + 05 1.e + 0 6 fr equ e ncy [ h z] psrr [db] 2.7v_vdd 2. 7v _v s s psr r 0 20 40 60 80 100 12 0 14 0 1 . e + 0 0 1.e + 0 1 1.e + 02 1.e + 03 1 . e + 0 4 1.e + 0 5 1.e + 06 f r eq u e n cy [ h z] psrr [db] 5.0v_vdd 5.0v_vss
asah i kas ei [ ak2 92 0 ] ms09 53-e-0 1 20 11/ 06 - 10 - ? power sup p ly re jec tio n rati o vs. tem p erat ure (vdd=5 v ? ma xim u m out pu t sw in g vs. freq uen c y ? max i m u m output sw in g vs. freque ncy (vdd=2 . 7 v , ta=25 c, a v = 1, rl = 10k ) (vdd=5 v , ta=2 5 c, av = 1, r l = 10k ) psrr - te m p e r a t u r e 50 60 70 80 90 10 0 11 0 12 0 13 0 -4 0 1 0 6 0 t e mper a t u r e [ c ] psrr [db] m a xi m u m ou t p u t s w i n g 0 0.5 1 1.5 2 2.5 3 1.e + 01 1 . e + 02 1.e + 0 3 1.e + 04 1.e + 05 1 . e + 06 1.e + 07 fr equ e ncy [ h z] maximum output swing [v] m a xi m u m ou t p u t s w i n g 0 1 2 3 4 5 6 1. e+ 01 1. e+ 02 1. e+ 0 3 1. e+ 04 1. e+ 05 1. e+ 06 1. e + 07 f r equ e ncy [ h z] maximum output swing [v]
asah i kas ei [ ak2 92 0 ] ms09 53-e-0 1 20 11/ 06 - 11 - ? voltage noise de nsity ? v o lt a g e nois e d ensi t y (vdd=2 . 7 v , ta=25 c, f = 0~2 . 5 k h z) (vdd=5v, ta=25 c, f=0~ 2.5 k h z ) ? voltage noise de nsity ? v o lt a g e nois e d ensi t y (vdd=2 . 7 v , ta=25 c, f = 0~2 0 k h z) (vdd=5v, ta=25 c, f=0~ 20 kh z) vo l tage noise density 0 20 40 60 80 10 0 12 0 0 5 00 0 10 000 1 500 0 20 000 fr e q ue n c y [ h z ] voltage noise density [ n v/ hz] vo l t age no is e de ns ity 0 20 40 60 80 100 120 0 5000 10000 15000 200 00 f r e q ue nc y [ h z ] voltage noise density [ n v/ hz] v ol t a g e noi s e d e ns i t y 0 20 40 60 80 100 120 0 500 100 0 1500 2000 2500 f r e q u e nc y [ h z ] v ol t a ge noi s e de ns i t y [ nv / hz] v o lta ge noise density 0 20 40 60 80 10 0 12 0 0 5 0 0 1 0 0 01 5 0 02 0 0 02 5 0 0 f r e qu e nc y [ h z ] vo lt a g e n o is e d e n s it y [ n v/ hz ]
asah i kas ei [ ak2 92 0 ] ms09 53-e-0 1 20 11/ 06 - 12 - ? volt age n o i s e de nsity (vdd=5 v , ta=2 5 c, f= 1~10kh z) ? voltage noise ? v o l t age no ise (vdd=2 . 7 v , ta=25 c, f = 0 . 1 ~ 10 hz) (vdd=5 v , ta=25 c, f=0 . 1~ 10h z) v o ltage noise density 10 100 1 10 10 0 10 00 10 00 0 fr e que nc y [ h z ] voltage noise density [ n v/ hz] 0.1hz to 10hz noise v oltage [ v] tim e ( 1 s e c / di v) v n = 0.31 vpp vn +0.3 +0.2 -0.2 -0 . 3 0.1hz to 10 h z n o i s e v o lta ge [ v] t i m e ( 1 s e c / di v) v n = 0.18 vpp vn +0.3 +0.2 -0.2 -0.3 -0 . 1 +0.1
asah i kas ei [ ak2 92 0 ] ms09 53-e-0 1 20 11/ 06 - 13 - ? output s h ort-circuit c u rre nt vs. tem p erature ? ma xi m u m outp u t s w ing vs. freq uen cy (vdd=2 . 7 v , ta=-4 0 to 85 c) (vdd=5 v , ta=2 5 c, ta=-40 t o 85 c) ? in pu t o ffset v o ltag e d r ift( vdd=5 v , ta=2 5 c, ta=-40 to 85 c) i n pu t o f fs e t v o l ta g e d r i fft 0 5 10 15 20 25 30 -12 -8 - 4 0 4 8 1 2 i n pu t o ffs e t v o l ta g e drif t [ n v / ] nu mbe r o f a m plifie rs output short-ci r c u i t cu r r en t -5 0 -4 0 -3 0 -2 0 -1 0 0 10 20 30 40 50 - 4 0 - 2 0 0 2 04 06 0 8 0 te m p e r a t u r e [ c ] output shor t- cir c uit cur r e nt [ m a] is c - isc+ output s h or t - ci r c u i t cu r r en t -1 0 0 -8 0 -6 0 -4 0 -2 0 0 20 40 60 80 10 0 - 4 0 - 2 0 0 2 04 0 6 08 0 te m p e r a t u r e [ c ] output shor t- cir c uit cur r e nt [ m a] is c - isc+
asah i kas ei [ ak2 92 0 ] ms09 53-e-0 1 20 11/ 06 - 14 - package 1. marki n g 1.1 tmsop8 2. o u tli ne d i m e nsio ns 2.1 tmsop8 package outline (unit: mm) 9 8 (3 ) (4 ) (5 ) (1) 7 6 5 1 2 3 4 y 2 0 m a (2) (1) p i n n u m ber 1 i n d i c a t i on m a rk (2) p a rt n u m ber (3) d a t e c o de (y ea r) (4) d a te code ( m onth) (5) lo t n u m b er m 0. 1 4.00.1 2.8 2.9 +0.12 -0.1 0.65 0.127 +0.1 -0.05 0.550.2 0~10 0.90.08 0.1 +0.1 -0.05 0.1 0.2 +0.05 -0.03 1
asah i kas ei [ ak2 92 0 ] ms09 53-e-0 1 20 11/ 06 - 15 - important notice z these produc t s and t h eir s p e c ifica t i ons are sub j ec t t o c h a nge with ou t n o ti ce. wh en you co nsi d er any u s e o r app l i cat io n of th ese prod u c ts, ple a se m a ke i n q u iri e s t h e sales offic e of asahi kase i microde v ic es corporati o n (akm) or aut h orize d d i stri bu tors as to curr ent s t at us of the pro ducts. z d e scripti ons o f exter n al circ uits, appl ica t i on circu its, softw a re an d o t h e r relat e d info rm ation c o n t ai ned in t h is d o cum ent are prov id ed only to ill u s trat e the oper ati on and a ppl icat ion e x am p l es of the s em i condu ctor prod uc ts. y ou are fully respons ib le fo r the in corp or ati on of t h ese exter n al circu its, ap pli cati o n circ uits , softw a re an d ot her rel a te d i n form ation in the des i g n of y our eq ui p m en t s . akm assu m e s n o resp on sib i li t y fo r an y l o sses i n cu rred by yo u o r th i r d p a rt ies ari s in g fro m the use of t h es e inf o rm ation herei n . a k m assum e s no lia bil ity for i n fri ngem e nt of a n y pate nt, int ell ectual pr operty , or o t h er righ ts i n t h e ap pli catio n or use of suc h in form ation c o n t ai ned here in . z an y ex po rt o f t h ese p r o d u c ts, o r devi ces or syst e m s co n t ai ni ng th em , may req u i re an ex po rt li cense o r oth e r offic i al appr ova l u n d e r the law a n d regu lat i o n s of t h e c o u n try of exp o rt perta i n i ng to c u stom s and tariffs, currency exchange , or strategic m a terials. z a k m prod uct s are n e it her i n te nde d nor a u th oriz ed f o r use as crit ica l com ponents no t e 1 ) in any safe t y , life su pp ort, o r oth e r ha zard relate d dev i ce or sy stem no t e 2 ) , an d a k m as su m e s no resp onsi b il ity for such use, e x ce pt for the use appr ove d wit h the express w r itte n c onse n t by repres ent a tiv e direct or o f akm. as u s ed here: note1) a critical component is o ne whose f a ilur e to fun c tion or p e rform ma y reas onably b e expected to result, wheth e r d i rect l y or indi rec t l y , in the loss of th e safety or eff ectiv eness of the device or s y s t em contain i ng it, an d which must th erefore meet ver y high standards of perfo rm anc e and re liab ili t y . note2) a hazar d rel a ted dev i ce or s y s t em is one des i gned or int e nded for lif e s up port or m a in ten a nce of safet y or for app lica tions in m e di ci ne, aerospace, nuclear en erg y , or othe r fields, i n which its f a ilur e to function or p e rfo rm m a y r easona bl y be exp ect ed t o result in loss o f lif e or in sign if icant in jur y or d a m a ge to person or prop er ty . z it is t h e res p o n sib ili ty of t h e buy er or dis t ribu tor of a k m pro d u c ts, w ho distri bu tes, dis poses of, o r othe rwise p l ac es th e pr od uct with a t h ird p a rty, to n o tify such th ird part y in a dvanc e o f the ab ov e con t en t a n d co ndi ti ons, an d t h e buy er or di stribu tor agree s to assum e any and all resp onsi b il ity a n d lia bil ity for a n d ho l d a k m harm less fro m any a nd all cl aim s arising fro m the use of said produc t i n the abse nc e of such n o tif icat ion .

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