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sensor solutions /// MS5525DSO page 1 0 9 /201 6 MS5525DSO (digital small outline) specifications ? integrated digital pressure sensor (24 - bit ? adc) ? fast conversion down to 1 ms ? low power, 1 a (standby < 0.15 a) ? supply voltage: 1.8 to 3.6v ? pressure range: 1 to 3 0 psi ? i 2 c and spi interface the ms5 525 dso is a new generation of digital small outline pressure sensors from meas with spi and i 2 c bus interface designed for high volume oem users. the sensor module includes a pressure s ensor and an ultra low power 24 - bit ? adc with internal factory calibrated coefficients. it provides a 24 - bit digital pressure and temperature value and different operation modes that allow the user to optimize for conversion s peed and current consumption. the ms 5 525 dso can be interfaced to virtually any microcontroller. the communication protocol is simple, without the need of programming internal registers in the device . this new sensor module generation is based on leading m ems technology and latest benefits from te proven experience and know - how in high volume manufacturing of pressure modules, which have been widely used for over a decade. the rugged engineered thermoplastic transducer is available in single and dual port configurations, and can measure absolute, gauge, compound, and differential pressure from 1 to 30psi.
MS5525DSO (digital small outline) sensor solutions /// MS5525DSO 0 9 /201 6 page 2 features ? small outline ic package ? barbed pressure ports ? low power, high resolution adc ? digital pressure and temperature outputs applications ? factory automation ? altitude and airspeed measurements ? medical instruments ? leak detection standard ranges (psi) fs pressure absolute gauge differential 1 db, sb, st , dh ,ft db, sb, st , dh 2 db, sb, st , dh ,ft db, sb, st , dh 5 db, sb, st , dh ,ft db, sb, st ,dh 15 d b, dh ,ft db, sb, st , dh ,ft db , dh 30 d b, dh ,ft db, sb, st , dh ,ft db , dh see package configurations: db = dual barb, dh= dual hole, sb=single barb, st= single tube , ft=front side tube
MS5525DSO (digital small outline) sensor solutions /// MS5525DSO 0 9 /201 6 page 3 absolute maximum rating parameter conditions min max unit symbol/notes supply voltage t a = 25c - 0.3 3.6 v v dd storage temperature - 40 125 c overpressure t a = 25 c, both ports 60 psi burst pressure t a = 25 c, port 1 psi see table 1 esd hbm - 4 +4 kv en 61000 - 4 - 2 solder temperature 250c, 5 sec max. table 1 - burst pressure by range and port designation . range port 1 port 2 unit 001 10 10 psi 002 20 20 psi 005 50 15 psi 015 120 60 psi 030 120 120 psi environmental specifications parameter conditions mechanical shock mil spec 202f, method 213b, condition c, 3 drops mechanical vibration mil spec 202f, method 214a, condition 1e, 1hr each axis thermal shock 100 cycles over storage temperature, 30 minute dwell life 1 million fs cycles mttf >10yrs, 70 oc, 1 million pressure cycles, 120%fs pressure
MS5525DSO (digital small outline) sensor solutions /// MS5525DSO 0 9 /201 6 page 4 performance specifications supply voltage 1 3. 0 vdc reference temperature: 25c (unless otherwise specified) parameters min typ max units notes operating voltage 1.8 3.6 adc 24 bits pressure accuracy see table 2 below %fs 2,5 total error band (teb) - 2.5 2.5 %fs 3 temperature accuracy (reference temperature) 1.5 oc 4,5 temperature accuracy 2.5 oc 4,5 supply current see osr table below ma compensated temperature 0 85 oc operating temperature - 40 +125 oc conversion time see osr table below ms weight 3 grams media non - corrosive dry gases compatible w ith silicon, glass, lcp , rtv, gold, thermo - epoxy, silicone gel, aluminum and epoxy. see wetted material by port designation chart. notes 1. proper operation requires an external capacitor placed a s shown in application circuit. output is not ratiometric to supply voltage. 2. the maximum deviation from a best fit straight line(bfsl) fitted to the output measured ov er the pressure range at 25c. includes all errors due to pressure non linearity, hysteresis, and non repeatability. 3. the maximum deviation from ideal output with respect to input pressure and temperature over the compensated temperature range. total error band (teb) includes all accuracy errors, thermal errors over the compensated temperature range , span and offset calibration tolerances. teb values are valid only at the calibrated supply volt age. 4. the deviation from a best fit straight line (bfsl) from 25c. to 85c. 5. six coefficients must be read by microcontroller software and are used in a mathematical calculation for converting d1 and d2 into compensated pressure and temperature values. table 2 - t ypical accuracy specification by pressure range range port 1 port 2 unit 001 0.25 1.0 %fss 002 0.25 0.5 %fss 005 0.50 1.0 %fss 015 0.25 0.25 %fss 030 0.25 0.25 %fss
MS5525DSO (digital small outline) sensor solutions /// MS5525DSO 0 9 /201 6 page 5 oversamplng ratio (osr) performance characteristics supply current ch a r a c t e r i s ti c s p a r a m e t e r s y m b o l c ond i t i on s mi n . t y p . m a x u n i t s upp l y c u rr e n t ( 1 sa m p l e p e r s e c . ) i dd o s r 409 6 204 8 102 4 51 2 25 6 12 . 5 6 . 3 3 . 2 1 . 7 0 . 9 a p e a k s upp l y c u r r e n t du r i n g c on v e r s i o n 1 . 4 m a s t andb y s u pp l y c u r r e n t a t 2 5 c 0 . 0 2 0 . 1 4 a a n a lo g d i g i t a l c o n v e r t er ( a dc ) p a r a m e t e r s y m b o l c ond i t i on s mi n . t y p . m a x u n i t c on v e r s i o n t i m e t c o s r 409 6 204 8 102 4 51 2 25 6 7 . 4 0 3 . 7 2 1 . 8 8 0 . 9 5 0 . 4 8 8 . 2 2 4 . 1 3 2 . 0 8 1 . 0 6 0 . 5 4 9 . 0 4 4 . 5 4 2 . 2 8 1 . 1 7 0 . 6 0 m s input/output specifications d ig i t a l i n p u t s ( c s b , i 2 c , d i n , s c l k ) p a r a m e t e r s y m b o l c ond i t i on s mi n . t y p . m a x u n i t s e r i a l d a t a c l o ck sc l k sp i p r o t o c o l 2 0 m h z serial data clock scl i2c protocol 400 khz i np u t h i g h v o l t ag e v i h p i n s cs b 80 % v dd 100 % v dd v i np u t l o w v o l t ag e v i l 0 % v dd 20 % v dd v i np u t l e a k ag e c u r r e n t i l e a k 25 c i l e a k 85 c a t 2 5 c 0 . 1 5 a i np u t c apa c i t an ce c i n 6 p f p r ess ur e o u t p u t s ( i 2 c , d o u t ) p a r a m e t e r s y m b o l c ond i t i on s mi n . t y p . m a x u n i t o u t pu t h i g h v o l t ag e v o h i s ou rc e = 0.6 m a 80 % v dd 100 % v dd v o u t pu t l o w v o l t ag e v o l i s i nk = 0.6 m a 0 % v dd 20 % v dd v loa d c apa c i t an ce c l o a d 1 6 p f
MS5525DSO (digital small outline) sensor solutions /// MS5525DSO 0 9 /201 6 page 6 functional description f i g u r e 1 : b l o ck d i a g r a m o f MS5525DSO g e n e r a l t h e MS5525DSO c on s i s t s o f a p i e z o - r e s i s t i v e s en s o r an d a s en s o r i n t e r f a ce i c . t h e m a i n f un c t i o n o f t h e MS5525DSO i s t o c o n v e r t t h e un c o m pen s a t e d an al og ou t pu t v o l t ag e f r o m t h e p i e z o - r e s i s t i v e p r e ss u re s e n s o r t o a 24 - b i t d i g i t a l v a l ue , a s w e l l a s p r o v i d i n g a 24 - b i t d i g i t a l v a l u e f o r t h e t e m pe r a t u re o f t h e s en s o r. f a c to r y c a li br a tio n e v e r y m od u l e i s i ndi v idual l y f a c t o ry c al i b r a t e d a t two t e m pe r a t u r e s an d three p r e s s u r e s . as a r e s ult, six c oe ff i c i e n t s ne c e s s a ry t o c o m pen s a t e f o r p r o c e s s v a r i a t i on s an d t e m pe r a t u re v a r i a t i on s a re c a l c u l a t e d an d s t o r e d i n t h e 128 - b i t p r o m o f ea ch m odu l e . t he s e bi t s, p a r t i t i one d i n t o six c o e ff i c i en t s, c1 through c6, m u s t b e r ea d b y t h e m i cr o c o n t r olle r s o f t w a re an d u s e d i n t h e p r og r a m c o n v e r t i n g d 1 an d d 2 i n t o c o m pen s a t e d p r e s s u re an d t e m pe r a t u re v a l ue s . the coefficients c0 and c7 are for factory calibration and crc. se r i a l i n t e r f a c e t h e MS5525DSO ha s bui l t i n t w o t y pe s o f s e r i a l i n t e r f a c e s : s pi an d i 2 c . p ull i n g t h e pr o t o c o l s e l e ct p i n ps t o l o w s e l e c t s t h e spi p r o t o c ol , p u l l i n g p s t o h i g h a c t i v a t e s t h e i 2 c bu s p r o t o c o l . p i n ps m od e p in s u se d h i g h i 2 c sd a , scl csb lo w sp i sd i , sd o , sclk, cs b spi m o d e t h e e x t e r n a l m i cr o c on t r o l l e r c l o cks i n t h e da t a t h r oug h t h e i npu t s cl k (s e r i a l clo ck) an d s d i (s e r i a l da t a i n ). i n t h e spi m od e m odu l e c a n a cc ep t bo t h m od e 0 a n d m od e 3 f o r t h e c l o ck po l a r i t y an d ph a s e . t h e s e n s o r r e s po n d s o n t h e ou t pu t s d o (s e r i a l da t a o u t ) . t h e p i n c sb ( ch i p s e l e c t ) i s u s e d t o enab l e / d i s ab l e t h e i n t e r f a c e , s o t ha t o t he r d e v i c e s c a n t a l k o n t h e s a me spi bu s . t h e c sb p i n c a n b e pu ll e d h i g h a f t e r t h e c o m m an d i s s en t o r a f t e r t h e en d o f t h e c o m m an d e x e c u t i o n ( f o r e x a m p l e en d o f c o n v e r s i on ). t h e be s t no i s e pe r f o r m an ce f r o m t h e m odu l e i s ob t a i ne d w he n t h e s p i bu s i s i d l e an d w i t hou t c o m m u n i c a t i o n t o o t he r d e v i c e s du r i n g t h e a d c c o n v e r s i on . block diagram
MS5525DSO (digital small outline) sensor solutions /// MS5525DSO 0 9 /201 6 page 7 i 2 c m o d e & addressing t h e e x t e r na l m i c r o c on t r ol l e r c l o cks i n t h e da t a through the input scl (serial cloc k ) and sda ( s e r i a l d a t a ). t h e s en s o r r e s po n d s o n t h e s a m e p i n s d a w h i ch i s bid i r e c t i ona l f o r t h e i 2 c bu s i n t e r f a c e . so t h i s i n t e r f a ce t y p e u s e s o n l y 2 s i gna l li ne s an d do e s n o t r equ i re a c h i p s el e c t , w h i ch c a n b e f a v or a bl e t o r edu ce boa rd s pa c e . i n i 2 c - m od e t h e c o m p l e m e n t o f t h e p i n c sb ( c h i p s e l e c t ) r ep r e s en t s t h e l sb o f t h e i 2 c add r e ss . i t i s po s s i b l e t o u s e t w o s e n s o r s w i t h t w o d i f f e r en t add r e ss e s o n t h e i 2 c bu s . t h e p i n c sb must b e c onne c t e d t o v d d o r g n d d o no t l e a v e these pins un c onne c t e d . p i n csb address (7 bits) h i g h 0x76 lo w 0x77 c o mm a nd s t h e MS5525DSO ha s on l y f i v e ba s i c c o mm and s : 1 . re s e t 2 . rea d p r o m ( 12 8 b i t o f c al i b r a t i o n w o r d s ) 3 . d 1 c o n v e r s i o n 4 . d 2 c o n v e r s i o n 5 . rea d a d c r e s u l t ( 2 4 b i t p r e ss u r e / t e m pe r a t u r e ) size of each command is 1 byte (8 bits) as described in the table below. after adc read commands the device will return 24 bit result and after the prom read 16bit result. the address of the prom is embedded inside of the prom read command using the ad2, ad1 and ad0 bits. c o m m a n d b y t e he x v a l u e b i t n u m b e r 0 1 2 3 4 5 6 7 b i t n a m e p rm c o v - t yp a d2 / o s2 a d1 / o s1 a d0 / o s0 s t o p c o mm an d r e s e t 0 0 0 1 1 1 1 0 0 x 1 e c on v e r t d 1 ( o sr = 2 56 ) 0 1 0 0 0 0 0 0 0 x 4 0 c on v e r t d 1 ( o sr = 5 12 ) 0 1 0 0 0 0 1 0 0 x 4 2 c on v e r t d 1 ( o sr = 1 024 ) 0 1 0 0 0 1 0 0 0 x 4 4 c on v e r t d 1 ( o sr = 2 048 ) 0 1 0 0 0 1 1 0 0 x 4 6 c on v e r t d 1 ( o sr = 4 096 ) 0 1 0 0 1 0 0 0 0 x 4 8 c on v e r t d 2 ( o sr = 2 56 ) 0 1 0 1 0 0 0 0 0 x 5 0 c on v e r t d 2 ( o sr = 5 12 ) 0 1 0 1 0 0 1 0 0 x 5 2 c on v e r t d 2 ( o sr = 1 024 ) 0 1 0 1 0 1 0 0 0 x 5 4 c on v e r t d 2 ( o sr = 2 048 ) 0 1 0 1 0 1 1 0 0 x 5 6 c on v e r t d 2 ( o sr = 4 096 ) 0 1 0 1 1 0 0 0 0 x 5 8 ad c r e a d 0 0 0 0 0 0 0 0 0 x 0 0 pr o m r e a d 1 0 1 0 a d 2 a d 1 a d 0 0 0 x a 0 t o 0 x a e f i g u r e 4 : c o mm a n d s t r u c t u r e
MS5525DSO (digital small outline) sensor solutions /// MS5525DSO 0 9 /201 6 page 8 start 5525dso - pp005gs example tmin= - 4 0 c , tmax=125c read calibration data from prom read digital pressure and temperature data d1 digital pressure value unsigned int 32 24 0 16777216 5240585 d2 digital temperature value unsigned int 32 24 0 16777216 3869265 calculate temperature dt difference between actual and reference temperature dt = d2 - t re f = d2 - c5 * 2 q5 signed int 32 25 - 16776960 16777216 47953 temp measured temperature temp=20 c+dt*tempsens=2000+dt*c6/2 q6 signed int 32 41 - 4000 12500 2501 =25. 01 c calculate temperature compensated pressure off offset at actual temperature off=off t1 +tco * dt=c2*2 q2 +(c4*dt)/2 q4 signed int 64 41 5218046194 sens sensitivity at actual temperature sens=sens t1 +tcs*dt=c1*2 q1 +(c3*dt)/2 q3 signed int 64 41 2415906558 p temperature compensated pressure p=d1*sens - off=(d1*sens/2 21 - off)/2 15 signed int 32 61 24996 = 2.4996 psi figure 1: flow chart for pressure and temperature reading and software compensation. variable coefficient description recommended variable type size [1] value example/ typical [bit] min max c1 pressure sensitivity, sens t1 unsigned int 16 16 0 65535 36402 c2 pressure offset, off t1 unsigned int 16 16 0 65535 39473 c3 temperature coefficient, pressure sensitivity, tcs unsigned int 16 16 0 65535 40393 c4 temperature coefficient, pressure offset, tco unsigned int 16 16 0 65535 29523 c5 reference temperature, t ref unsigned int 16 16 0 65535 29854 c6 temperature coefficient temperature, tempsens unsigned int 16 16 0 65535 21917 display pressure and temperature value
MS5525DSO (digital small outline) sensor solutions /// MS5525DSO 0 9 /201 6 page 9 qx coefficients matrix by pressure range part number pmin pmax q1 q2 q3 q4 q5 q6 t res (c) p res (psi) 5525dso - pp001gs 0 1 14 16 7 5 7 21 0.01 0.0001 5525dso - pp001ds - 1 1 15 17 7 5 7 21 0.01 0.0001 5525dso - pp002gs 0 2 14 15 8 6 7 22 0.01 0.0001 5525dso - pp002ds - 2 2 16 1 8 6 4 7 22 0.01 0.0001 5525dso - pp005gs 0 5 1 6 1 7 6 5 7 21 0.01 0.0001 5525dso - pp005ds - 5 5 1 7 19 5 3 7 22 0.01 0.0001 5525dso - pp0015as 0 15 16 1 7 6 5 7 22 0.01 0.0001 5525dso - pp0015gs 0 15 16 1 7 6 5 7 22 0.01 0.0001 5525dso - pp0015ds - 15 15 17 19 5 3 7 22 0.01 0.0001 5525dso - pp0030as 0 30 17 1 8 5 4 7 22 0.01 0.0001 5525dso - pp0030gs 0 30 17 1 8 5 4 7 22 0.01 0.0001 5525dso - pp0030ds - 30 30 1 8 20 4 1 7 22 0.01 0.0001 mem o ry mapping memory mapping address 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 reserved for m anufacturer 1 coefficient 1 (c1) 2 coefficient 2 (c2) 3 coefficient 3 (c3) 4 coefficient 4 (c4) 5 coefficient 5 (c5) 6 coefficient 6 (c6) 7 crc figure 2: memory prom mapping notes [ 1 ] maximal size of intermediate result during evaluation of variable.
MS5525DSO (digital small outline) sensor solutions /// MS5525DSO 0 9 /201 6 page 10 spi interface r es e t s e q u e nc e t h e re s e t s eq u en ce s ha l l b e s en t o n ce a f t e r po w e r - o n t o m a ke s u re t ha t t h e c a li b r a t i o n p r o m ge t s l oade d i n t o t h e i n t e r na l r e g i s t e r. i t c a n b e a l s o u s e d t o r e s e t t h e d e v i ce r o m f r o m a n un k no w n c ond i t i o n
MS5525DSO (digital small outline) sensor solutions /// MS5525DSO 0 9 /201 6 page 11 c o n ve r s i o n se q u e n c e t h e c o n v e r s i o n c o mm an d i s u s e d t o i n i t i a t e un c o m pe n s a t e d p r e s s u re ( d1 ) o r u n c o m pen s a t e d t e m pe r a t u re ( d2 ) c o n v e r s i on . t h e c h i p s e l e ct c a n b e d i s ab l e d du r i n g t h i s t i m e t o c o m m uni c a t e w i t h o t he r d e v i c e s . a f t e r t h e c o n v e r s i on , u s i n g a d c r ea d c o mm an d t h e r e s u l t i s c l o ck e d ou t w i t h t h e msb f i r s t . i f t h e c o n v e r s i o n i s no t e x e c u t e d b e f o re t h e a d c r ea d c o m m and , o r t h e a d c r ea d c o m m an d i s r epea t ed , i t w i l l g i v e 0 a s t h e ou t pu t r e s u l t . i f t h e a d c r ea d c o m m an d i s s en t du r i n g c o n v e rs i o n t h e r e s u l t w i l l b e 0 , t h e c o n v e r s i o n w i l l no t s t o p a n d t h e f i n a l r e s u l t w i l l b e w r ong . co n v e r s i o n s equen ce s e n t du r i n g t h e al r ead y s t a r t e d c o n v e r s i o n p r o c e s s w il l y ie l d i n c o rr e ct r e s u l t a s w e ll . p r o m r e a d se q u e nc e t h e r ea d c o m m an d f o r p r o m s ha l l b e e x e c u t e d o n ce a f t e r r e s e t b y t h e u s e r t o r e a d t h e c on t en t o f t h e c al i b r a t i o n p r o m an d t o c a l c u l a t e t h e c a li b r a t i o n c o e ff i c i en t s . t he re a re i n t o t a l 8 add r e ss e s r e s u l t i n g i n a t o t a l m e m o r y o f 12 8 b i t . a dd r e s s 0 c o n t a i n s f a c t o ry da t a an d t h e s e t up , add r e s s e s 1 - 6 c a li b r a t i o n c oe ff i c i en t s an d add r e ss 7 c on t a i n s t h e s e r i a l c od e an d crc . t h e c o m m an d s equen ce i s 8 b i t s l on g w i t h a 1 6 bi t r e s u l t w h i ch i s c l o ck e d w i t h t h e m sb f i r s t .
MS5525DSO (digital small outline) sensor solutions /// MS5525DSO 0 9 /201 6 page 12 i 2 c interface c o mm a nd s e a ch i 2 c c o mm un i c a t i o n m e ss ag e s t a r t s w i t h t h e s t a rt c ond i t i o n an d i t i s ende d w i t h t h e s t o p c ond i t i on . t h e MS5525DSO add r e ss i s 111011c x , w he re c i s t h e c o m p l e m en t a ry v a l u e o f t h e p i n c s b . s i n ce t h e i c doe s no t h a v e a m i cr o c on t r o l l e r i n s i de , t h e c o m m and s f o r i 2 c an d spi a re qui t e s i m i l a r. r es e t s e q u e nc e t h e r e s e t c a n b e s en t a t an y t i m e . i n t h e e v en t t ha t t h e re i s no t a s u cc e ss f u l po w e r o n r e s e t t h i s m a y b e c au s e d b y t h e s d a be i n g b l o ck e d b y t h e m od u l e i n t h e a ck no w l edg e s t a t e . t h e on l y w a y t o ge t t h e MS5525DSO t o f un c t i o n i s t o s en d s e v e r a l s cl ks f o ll o w e d b y a r e s e t s equen ce o r t o r epea t po w e r o n r e s e t . figure 10: i2c reset command p r o m r e a d se q u e nc e th e p r o m rea d c o m m an d c on s i s t s o f t w o pa r t s . f i rs t c o m m an d s e t s u p t h e s y s t e m i n t o p r o m r ea d m ode . t h e s e c on d pa rt ge t s t h e da t a f r o m t h e s y s t e m . figure 11: i2c command to read memory address= 011 (coefficient 3) figure 12: i2c response from MS5525DSO 1 1 1 0 1 1 csb 0 0 1 0 1 0 0 1 1 0 0 s w a a p from master s = start condition w = write a = acknowledge from slave p = stop condition r = read n = not acknowledge command device address device address cmd byte 1 1 1 0 1 1 csb 0 0 1 0 1 0 0 1 1 0 0 s w a a p from master s = start condition w = write a = acknowledge from slave p = stop condition r = read n = not acknowledge command device address device address cmd byte 1 1 1 0 1 1 csb 1 0 1 1 0 0 x x x x 0 x x x x x x x x 0 s r a a n p from master s = start condition w = write a = acknowledge from slave p = stop condition r = read n = not acknowledge data data device address memory bit 15 - 8 memory bit 7 - 0 device address
MS5525DSO (digital small outline) sensor solutions /// MS5525DSO 0 9 /201 6 page 13 c o n ve r s i o n se q u e n c e a c o n v e r s i o n c a n b e s t a r t e d b y s end i n g t h e c o m m an d t o MS5525DSO . w he n c o m m an d i s s en t t o t h e s y s t e m i t s t a ys bu s y un t i l c o n v e r s i o n i s done . w he n c o n v e r s i o n i s f i n i s he d t h e da t a c a n b e a cc e s s e d b y s end i n g a r e a d c o m m an d , wh en a n a ck n o w l edg e a ppea r s f r o m t h e MS5525DSO , 2 4 s cl k cyc l e s m a y b e s en t t o r e c ei v e a l l r e s u l t bi t s . e v e ry 8 - bi t t h e s y s t e m w a i t s f o r a n a ck no w l edg e s i gna l . figure 13: i 2 c command to initiate a pressure conversion (osr=4096, typ=d1) figure 14: i 2 c adc read sequence figure 15: i 2 c response from MS5525DSO c y c li c r e dund a nc y ch e c k ( crc ) MS5525DSO c on t a i n s a p r o m m e m o ry w i t h 128 - b i t . a 4 - b i t cr c ha s bee n i m p l e m en t e d t o c he ck t h e d a t a v a l i di t y i n m e m o ry. t h e appl i c a t i o n n o t e a n52 0 de s cr i b e s i n de t ai l crc - 4 c od e u s ed . 1 1 1 0 1 1 csb 0 0 0 1 0 0 1 0 0 0 0 s w a a p from master s = start condition w = write a = acknowledge from slave p = stop condition r = read n = not acknowledge command cmd byte device address device address 1 1 1 0 1 1 csb 0 0 0 0 0 0 0 0 0 0 0 s w a a p from master s = start condition w = write a = acknowledge from slave p = stop condition r = read n = not acknowledge command device address device address cmd byte 1 1 1 0 1 1 csb 1 0 x x x x x x x x 0 x x x x x x x x 0 x x x x x x x x 0 s r a a a n p from master s = start condition w = write a = acknowledge from slave p = stop condition r = read n = not acknowledge data data data device address device address data 23-16 data 7 - 0 data 8 - 15
MS5525DSO (digital small outline) sensor solutions /// MS5525DSO 0 9 /201 6 page 14 pinout, marking, and pressure type configuration pressure type pmin pmax description absolute 0psia +prange output is proportional to the difference between 0psia (pmin) and pressure applied to port 1 . differential / bidirectional - prange +prange output is proportional to the difference between port 1 and port 2. output swings positive when port 2 > port 1 . o utput is 50% of total counts when port 1=port 2. gauge 0psig +prange output is proportional to the difference between 0psig (pmin) and port 1. output swings positive when port 2 > port 1 . pin name pin function i2c spi sgnd 1,3 sensor ground sout - 2,4 sensor outputs, negative sdo 5 serial data output sda/sdi 6 i 2 c d a t a input and output spi s e r i a l d a t a i np ut scl/sclk 7 i 2 c clock spi clock csb 8 defines i 2 c address c h i p s e l e ct ( a c t i ve l o w) gnd 9 ground ps 10 p r o t o c o l s e l e ct p s = ( vdd ) p s = (gnd) i 2 c protocol selected spi protocol selected csb= (vdd) i 2 c address =1110110x (0xec, 0xed) csb= (gnd) i 2 c address=1110111x (0xee, 0xef) supply+ 11 ,13 positive supply voltage sout+ 12,14 sensor outputs, positive wetted material by port designation material style port lcp thermo - epoxy resin epoxy rtv glass silicon silicone gel all port 1 x x x x port 2 x x x x x x "x" indicates wetted materi als
MS5525DSO (digital small outline) sensor solutions /// MS5525DSO 0 9 /201 6 page 15 recommend pcb layout
MS5525DSO (digital small outline) sensor solutions /// MS5525DSO 0 9 /201 6 page 16 application circuit the MS5525DSO i s a c i rc u i t t ha t c a n b e u s e d i n c on j un c t i o n w i t h a m i cr o c o n t r ol l e r. i t i s de s i gne d f o r l o w - v o l t ag e s y s t e m s w i t h a s upp l y v ol t ag e o f 3 v. f i g u r e 17 : t y p i c a l ap p l i c a t i o n c i r c u i t wi t h s p i / i 2 c p r o t o c o l co m m un i c a t i o n note 1. place 100nf capacitor between supply and gnd to within 2 cm of sensor.
MS5525DSO (digital small outline) sensor solutions /// MS5525DSO 0 9 /201 6 page 17 dimensions MS5525DSO - db xxxy s
MS5525DSO (digital small outline) sensor solutions /// MS5525DSO 0 9 /201 6 page 18 MS5525DSO - st xxxy s
MS5525DSO (digital small outline) sensor solutions /// MS5525DSO 0 9 /201 6 page 19 MS5525DSO - sb xxxy s
MS5525DSO (digital small outline) sensor solutions /// MS5525DSO 0 9 /201 6 page 20 MS5525DSO - dh xxxy s
MS5525DSO (digital small outline) sensor solutions /// MS5525DSO 0 9 /201 6 page 21 MS5525DSO - ft xxxy s
MS5525DSO (digital small outline) sensor solutions /// MS5525DSO 0 9 /201 6 page 22 ordering information 5525dso - db 005 g s model - package style pressure range pressure type pin style MS5525DSO - db = dual barb sb = single barb st = single tube dh = dual hole ft = front tube 001 002 005 015 030 a = absolute d = differential g = ga u ge s = gull wing north america europe asia measurement specialties , inc., a te connectivity company 45738 northport loop west fremont, ca 94538 tel: +1 800 767 1888 fax: +1 510 498 1578 customercare.frmt@te.com meas switzerland sarl, a te connectivity company ch. chapons - des - prs 11 ch - 2022 bevaix tel: +41 32 847 9550 fax: + 41 32 847 9569 customercare.bevx@te.com measurement specialties (china) ltd. , a te connectivity company no. 26 langshan road shenzhen high - tech park (north) nanshan district, shenzhen, 518057 china tel: +86 755 3330 5088 fax: +86 755 3330 5099 customercare.shzn@te.com te.com/sensorsolutions measurement specialties, inc., a te connectivity company. measurement specialties, te connectivity, te connectivity (logo) and every connection counts are trademarks. all other logos, products and/or company names referred to herein might be trademarks of their respective owners. the information given herein, including drawings, illustrations and schematics which are intended for illustration purposes only, is believed to be reliable. however, te connectivity makes no warranties as to its accuracy or completeness and disclaims any liability in connection with its use. te connectivitys ob ligations shall only be as set forth in te c onnectivitys standard terms and conditions of sale for this product and in no case will te connectivity be liable for any incidental, indirect or c onsequential damages arising out of the sale, resale, use or misuse of the product. users of te connectivity products should make their own evaluation to determine the suitability of each such product for the specific application. ? 2015 te connectivity ltd. family of companies all rights reserved.

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