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data sheet rev. 1 . 1 2 / july 20 1 3 zs c 31050 advanced differential sensor signal conditioner multi - market sensing platforms precise and deliberate
for more information, contact zmdi via ssc@zmdi.com . zsc31050 advanced differential sensor signal conditioner ? 201 3 zentrum mikroelektronik dresden ag rev. 1.12 july 7 , 2013 all rights reserved. the material c o ntained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publication is subject to changes without notice. brief description zsc31050 is a cmos integrated circuit for highly accurate amplification and sensor - spe cific correction of bridge sensor and temperature sen sor signals. the device provides digital compensa tion of sensor offset, sensitivity, temperature drift , and non - l inearity by a 16 - bit risc micro controller running a polynomial correction algorithm. the zsc31050 accommodates virtually any bridge sensor type (e.g. , piezo - resistive, ceramic thick - film or steel membrane based). in addition, it can interface to a separate temperature sensor. the bi - directional digital interfaces (i 2 c ? * , spi, and zacwire ?) ca n be used for a simple pc - con trolled one - pass calibration procedure to program a set of calibration coefficients into an on - chip eeprom. a specific sensor and a zsc31050 can be mated digitally: fast, precise and without the cos t overhead associated with t rim ming by external devices or laser. the zacwire? interface ena bles an end - of - line calibration of the sensor module. typical applications for the zsc31050 include indus - trial, medi c al, and consumer products. it is specif i - cally engineered for most resisti ve bridge sensors; e.g., sensors for measuring pressure, force, torque, acceleration, angle, position , and revolution . benefits ? no external trimming components required ? pc - controlled configuration and calibration via digital bus interface C simple, low co st ? high accuracy (0.1% fso @ - 25 to 85c; 0.25% fso @ - 40 to 125c) ? available support ? evaluation kit available ? support for industrial mass calibration available ? quick circuit customization possible for large production v olumes * i 2 c? is a trademark of nxp. ? features ? digital compe nsation of sensor offset, sensitivity, temperature drift , and non linearity ? accommodates nearly all resistive bridge sensor types (signal spans from 1 mv/v up to 275mv/v ) ? digital one - pass calibration: quick and precise ? selectable compensation temperature s ource: bridge, thermistor, or internal or external diode ? output options: voltage (0 to 5v), current (4 to 20ma), pwm, i 2 c ? , spi, zacwire ? (one - wire interface), alarm ? adjustable output resolution (up to 15 bits) versus sampling rate (up to 3.9khz) ? curre nt consumption: 2.5ma (typical) ? selectable bridge excitation: ratiometric voltage, constant voltage , or constant current ? input channel for separate temperature sensor ? sensor connection and common mode check (sensor aging detection) physical characteristic s ? o peration temperature - 40 to +1 25 c ( - 40 to +150c derated, depending on product version) ? supply voltage : 2.7 to 5.5 v ; with external jfet : 5 to 40v ? available in ssop16 package or as die zsc31050 overview out vcc gnd sensor module zsc31050
zsc31050 advanced differential sensor signal conditioner ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 july 7 , 2013 all rights rese rved. the material c o ntained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consen t of the copyright owner. zsc31050 block diagram ordering information (please refer to section 8 in the data sheet for additional options.) pro duct sales code description package zsc31050feb zsc31050 die temperature range: - 40c to +1 50 c unsawn on wafer zsc31050fec zsc31050 die temperature range: - 40c to +150c sawn on wafer frame ZSC31050FED zsc31050 die temperature range: - 40c to +1 50c waffle pack zsc31050feg1 zsc31050 ssop - 16 temperature range: - 40c to +150c tube: add - t to sales code reel: add - r zsc31050 kit evaluation kit v3.0 modular zsc31050 ssc e valuation kit: three interconnecting boards, five zsc31050 ssop - 16 sampl es kit zsc31050 mass calibration system v1.1 modular mass calibration system (msc) for zsc31050 : mcs boards, cable, connectors, dvd with software and documentation kit typical applications automotive sensors : ? oil pressure ? temperature sensing ? strain gauges portable devices: ? altimeters ? blood pressure monitors industrial applications : ? 4 - 20ma transmitters ? intelligent sensor networks ? process automation ? factory automation consumer goods: ? weight scales ? flow meters ? strain gauges ? load meters ? hvac sales and further information www.zmdi.com ssc@zmdi.com zentrum mikroelektronik dresden ag global headquarters grenzstrasse 28 01109 dresden, germany central office: phone +49.351.8822.0 fax +49.351.8822.600 zmd america, inc. 1525 mccarthy blvd., #212 milpitas, ca 95035 - 7453 usa usa phone +855.275.9634 zentrum mikroelektronik dresden ag, japan office 2nd floor, shinbashi tokyu bldg. 4 - 21 - 3, shinbashi, minato - ku tokyo, 105 - 0004 japan zmd far east, ltd. 3f, no. 51, sec. 2, keelung road 11052 taipei taiwan zentrum mik roelektronik dresden ag, korea office u - space 1 building 11th floor, unit ja - 1102 670 sampyeong - dong bundang - gu, seongnam - si gyeonggi - do, 463 - 400 korea phone +82.31.950.7679 fax +82.504.841.3026 phone +408.883.6310 fax +408.883.6358 phone +81.3.6895.74 10 fax +81.3.6895.7301 phone +886.2.2377.8189 fax +886.2.2377.8199 european technical support phone +49.351.8822.7.772 fax +49.351.8822.87.772 disclaimer : this information applies to a product under development. its characteristics and specifications ar e subject to change without notice. zentrum mikroelek tronik dresden ag (zmd ag) assumes no obligation regarding future manufacture unless otherwise agreed to in writing. the information furnished hereby is believed to be true and accurate. however, under no circumstances shall zmd ag be liable to any customer, licensee, or any other third party for any special, indirect, incidental, or consequential damages of any kind or nature what soever arising out of or in any way related to the furnishing, performance , or use of this technical data. zmd ag hereby expressly disclaims any liability of zmd ag to any customer, licensee or any other third party, and any such customer, licensee and any other third party hereby waives any liab ility of zmd ag for any damages i n connection with or arising out of the furnishing, performance or use of this technical data, whether based on contract, war ranty, tort (including negligence), strict liability, or otherwise. european sales (stuttgart) phone +49.711.674517.55 fax +49.711 .674517.87955 g a i n f a c t o r s e n s o r b r i d g e e x t . t e m p . s e n s . i n t . t e m p . s e n s o r a n a l o g f r o n t - e n d ( a f e ) m u x a d c p g a + ? e x t e r n a l t e m p e r a t u r e s e n s o r i r _ t e m p v b r v i n p v i n n d i g i t a l s e c t i o n t e m p . s e n s . s e l e c t a d c m o d e o f f s e t s h i f t c t r l - r e g s s c l s i f s d a p c o m p f i o 1 f i o 2 o u t / o w i i o 1 i o 2 d a c p w m i n t e r f a c e s c m c e e p r o m r a m i n 3
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 4 of 31 contents 1 electrical characteristics ................................ ................................ ................................ ............................... 6 1.1. absolute maximum ratings ................................ ................................ ................................ .................... 6 1.2. operating conditions ................................ ................................ ................................ .............................. 6 1.3. inherent characteristics ................................ ................................ ................................ .......................... 8 1.3.1. cycle rate versus analog - to - digital conver sion (adc) resolution ................................ ................ 9 1.3.2. pwm frequency ................................ ................................ ................................ .............................. 9 1.4. electrical parameters ................................ ................................ ................................ ........................... 10 1.4.1. supply / regulation ................................ ................................ ................................ ........................ 10 1.4.2. analog front end ................................ ................................ ................................ ........................... 10 1.4.3. dac and analog output (out pin) ................................ ................................ ............................... 10 1.4.4. pwm output (out pin, io1 pin) ................................ ................................ ................................ ... 10 1.4.5. temperature sensors (ir_temp pin) ................................ ................................ ........................... 11 1.4.6. digital outputs (io1, io2, out pins in digital mode) ................................ ................................ .... 11 1.4.7. system response ................................ ................................ ................................ .......................... 11 1.5. interface characteristics ................................ ................................ ................................ ....................... 12 1.5.1. multiport serial interfaces (i 2 c?, spi) ................................ ................................ .......................... 12 1.5.2. one - wire serial interface (zacwire?) ................................ ................................ ......................... 12 2 circuit description ................................ ................................ ................................ ................................ ....... 13 2.1. signal flow ................................ ................................ ................................ ................................ ........... 13 2.2. application modes ................................ ................................ ................................ ................................ 14 2.3. analog front - end (afe) ................................ ................................ ................................ ....................... 15 2.3.1. programmable gain amplifier (pga) ................................ ................................ ............................. 15 2.3.2. extende d zero point compensation (xzc) ................................ ................................ ................... 16 2.3.3. measurement cycle performed by multiplexer ................................ ................................ .............. 17 2.3.4. analog - to - digital converter ................................ ................................ ................................ ............ 18 2.4. system control ................................ ................................ ................................ ................................ ..... 19 2.5. output stage ................................ ................................ ................................ ................................ ......... 20 2.5.1. analog output ................................ ................................ ................................ ................................ 21 2.5.2. comparator module (alarm output) ................................ ................................ ........................... 22 2.5.3. serial digital interface ................................ ................................ ................................ .................... 22 2.6. voltage regulator ................................ ................................ ................................ ................................ . 23 2.7. watchdog and error detection ................................ ................................ ................................ ............. 23 3 application circuit examples ................................ ................................ ................................ ....................... 24 4 esd/latch - up - protection ................................ ................................ ................................ ............................ 25 5 pin configuration and package ................................ ................................ ................................ ................... 26 6 reliability ................................ ................................ ................................ ................................ ..................... 27 7 customization ................................ ................................ ................................ ................................ .............. 27 8 ordering information ................................ ................................ ................................ ................................ ... 28
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 5 of 31 9 related documen ts ................................ ................................ ................................ ................................ ..... 29 10 glossary ................................ ................................ ................................ ................................ ...................... 29 11 document revision history ................................ ................................ ................................ ......................... 30 list of figures figure 2.1 block diagram of the zsc31050 ................................ ................................ ................................ ... 13 figure 2.2. measurement cycle zsc31050 ................................ ................................ ................................ ..... 17 figure 3.1 application example 1 ................................ ................................ ................................ ................... 24 figure 3.2 appli cation example 2 ................................ ................................ ................................ ................... 24 figure 3.3 application example 3 ................................ ................................ ................................ ................... 24 figure 3.4 application example 4 ................................ ................................ ................................ ................... 24 figure 3.5 application example 5 ................................ ................................ ................................ ................... 25 figure 5.1. pin configuration ................................ ................................ ................................ ........................... 27 list of tables table 1.1 absolute maximum ratings ................................ ................................ ................................ ............. 6 table 1.2 operating conditions ................................ ................................ ................................ ....................... 6 table 1.3 inherent characteristics ................................ ................................ ................................ ................... 8 table 1.4 cycle rate versus adc resolution ................................ ................................ ................................ . 9 table 1.5 pwm frequency ................................ ................................ ................................ .............................. 9 table 1.6 electrical parameters ................................ ................................ ................................ ..................... 10 table 1.7. interface characteristics ................................ ................................ ................................ ................ 12 table 2.1 adjustable gains, resulting sensor signal spans, and common mode ranges ........................ 15 table 2.2 extended zero point compensation (xzc) range ................................ ................................ ....... 16 table 2.3 output resolution versus sample r ate ................................ ................................ ........................ 19 table 2.4. output configurations overview ................................ ................................ ................................ .... 20 table 2.5. analog output configuration ................................ ................................ ................................ ......... 21 table 5.1. pin configuration ................................ ................................ ................................ ........................... 26
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 6 of 31 1 electrical characteristics 1.1. absolute maximum ratings table 1 . 1 absolute maximum ratings no. parameter symbol conditi ons min typ max unit 1.1.1 digital supply voltage vdd amr to vss - 0.3 6.5 v dc 1.1.2 analog supply voltag e vdda amr to vss - 0.3 6.5 v dc 1.1.3 voltage at all analog and digital i/o pins except fbp, sda, scl (see 1.1.4 , 1.1.5 , and 1.1.6 ) v a_i/o , v d_i/o - 0.3 vdda +0.3 v dc 1.1.4 voltage at fbp pin v fbp_amr 4 ma to 20ma C interface - 1.2 vdda +0.3 v dc 1.1.5 voltage at sda pin v d_i/o i2c i2c mo de only - 0.3 5.5 v dc 1.1.6 voltage at scl pin v d_i/o i2c i2c mode only - 0.3 5.5 v dc 1.1.7 storage temperature t stg - 45 150 ? c 1.2. operating conditions unless otherwise noted, voltages are relative to vss and analog - to - digital conversion = 2 nd order , resolution = 13 bits, gain ? 210, f clk ? 2.25mhz. for specifications marked with an asterisk (*), there is no measurement in mass production the parameter is guaranteed by design and/or quality observations. note: see important notes at the end of the table. table 1 . 2 operating conditions no. parameter symbol conditions min typical max unit 1.2.1 1.2.1.1 tqe a mbient temperature range for part number s zsc31050x e xx t amb_tqe operation life time < 1000h @ 125 to 150 ? c - 40 1 50 ? c 1.2.1.2 tqa ambient temperature range for part number s zsc31050x a xx t amb_tqa - 40 125 ? c 1.2.1.3 tqi ambient temperature range for part number s zsc31050x i xx t amb_tqi - 25 85 ? c 1.2.2 ambient temperature eeprom programming t amb_eep - 25 85 ? c 1.2.3 eeprom programming cycles 100 1.2.4 data retention (eeprom) average temp. < 85 ? c 15 a
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 7 of 31 no. parameter symbol conditions min typical max unit 1.2.5 analog supply voltage vdda ratiometric mode 2.7 5.5 v dc 1.2.6 analog supply voltage advanced performance vdda adv ratiometric mode 4.5 5.5 v dc 1.2.7 digital supply voltage vdd externally powered 1.05 vdda 2.7 v dc 1.2.8 external supply voltage v supp voltage regulator mode with ext. jfet 1 vdda + 2v v dc 1.2.9 common mode input range v in_cm depends on gain adjust, refer to section 2.3.1 . 0.21 0.76 vadc_ ref 1.2.10 input voltage fbp pin v in_fbp - 1 vdda v dc 1.2.11 sensor bridge resistance 2 (over full temperature range) r br 3.0 25.0 k ? r br_cl current loop interface, 4 to 20ma 5.0 25.0 k ? 1.2.12 reference resistor for bridge current source * r br_ref bridge current i br = vdda / (16r br_ref ) 0.07 r br 1.2.13 stabilization capacitor * c vdda external capacitor between vdda and vss 50 100 470 nf 1.2.14 vdd stabilization capacitor* c vdd between vdd and vss, external 3 0 100 470 nf 1.2.15 maximum load capacitance allowed at out 4 c l_out output voltage mode 50 nf 1.2.16 minimum load resistance allowed r l_out output voltage mode 2 k ? 1.2.17 maximum load capacitance allowed at vgate c l_vgate total capacitance relative to all potentials 10 nf 1. maximum depends on the breakdown voltage of the external jfet; refer to the application recommendations i n the zsc31050 application note 0 - 10v output . 2. no minimum limitation with an external connection between vdda and vbr. 3. lower stabilization capacitors can increase noise level at the output. 4. if maximum is used, consider the special requirements of the zacwir e ? interface stated in the zsc31050 functional description, section 4.3.
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 8 of 31 1.3. inherent characteristics for specifications marked with an asterisk (*), there is no measurement in mass production the parameter is guaranteed by design and/or quality observations. table 1 . 3 inherent characteristics n o . parameter symbol conditions min typ max unit 1.3.1 selectable input span, pressure measurement v in_sp refer to section 2.3.1 . 2 280 mv/v 1.3.2 analog offset comp range (6 bit setting) - 20 20 counts m aximum bias current 3 - 25 25 counts 1.3.3 a/d resolution r adc 3 - b it setting 2 9 15 bit s 1.3.4 d/a resolutio n r dac at analog output 11 bit s 1.3.5 pwm resolution r pwm 9 12 bit s 1.3.6 bias current for external temperature diodes i ts 8 18 40 ? a 1.3.7 sensitivity internal temperature diode st t_si raw values without conditioning 2800 3200 3600 ppm f . s. 1 /k 1.3.8 clock frequency * f clk g uaranteed adjustment range 1 2 4 mhz 1. full scale. 2. 15 - bit resolution is not applicable for 1 st order adc and not recommended for sensors with high nonlinearity behavior. 3. set configur ation word ad j ref:bcur ( bits 4 - 6) to 111 .
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 9 of 31 1.3.1. cycle rate versus analog - to - digital conversion (adc) resolution the following specifications are guaranteed by design and/or quality observations. table 1 . 4 cycle rate versus adc resolution adc order ( o adc ) resolution r adc conversion cycle f cyc f clk =2mhz f clk =2.25mhz [bit] [hz] [hz] 1 9 1302 1465 10 781 879 11 434 488 12 230 259 13 115 129 14 59 67 2 11 3906 4395 12 3906 4395 13 1 953 2197 14 1953 2197 15 977 1099 1.3.2. pwm frequency the following specifications are not measured in mass production; they are guaranteed by design and/or quality observations. table 1 . 5 pwm frequency pwm resolution r pwm [bit] pwm freq. in hz at 2 mhz clock 1 pwm freq./hz at 2.25 mhz clock 2 clock divider clock divider 1 0 . 5 0 . 25 0 . 125 1 0 . 5 0 . 25 0 . 12 5 9 3906 1953 977 488 4395 2197 1099 549 10 1953 977 488 244 2197 1099 549 275 11 977 488 244 122 1099 549 275 137 12 488 244 122 61 549 275 137 69 1. internal rc o scillator: coarse adjustment to 1, 2 and 4 mhz, fine - tuning +/ - 25%; external clock is als o possible. 2. internal rc o scillator: coarse adjustment to 1.125, 2.25 and 4.5 mhz, fine - tuning +/ - 25%; external clock is also possible.
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 10 of 31 1.4. electrical parameters unless otherwise noted, voltages are relative to vss and analog - to - digital conversion = 2 nd order , resolution = 13 bits, gain ? 210, f clk ? 2.25mhz. for specifications marked with an asterisk (*), there is no measurement in mass production the parameter is guaranteed by design and/or quality observations. note: see important notes at the end of the tabl e. table 1 . 6 electrical parameters n o . parameter symbol conditions min typ max unit 1.4.1. supply / regulation 1.4.1.1 supply current i supp without bridge and load current, b ias a dj ust ment ? 4 , f clk ? 2.4mhz 2.5 4 ma 1.4.1.2 supply current for current loop i supp_cl without bridge current, f clk ? 1.2mhz, bias adjustment 1 ? 1 2.0 2.75 ma 1.4.1. 3 temperature coefficient voltage reference * tc ref - 200 50 200 ppm/k 1.4.2. analog front end 1.4.2.1 parasitic differential input offset current * i in_off temp erature range = t amb_tqi - 40 to 85 ? c - 2 to - 10 2 to 10 na 1.4.3. dac and analog output (out pin ) 1.4.3.1 output signal range 2 v out_sr voltage mode, r load > 2k? vdda adv t emperature range = t amb_tqi 0.025 0.975 vdda 1.4.3.2 output dnl dnl out vdda adv t emperature range = t amb_tqi 0.95 lsb 1.4.3.3 output inl 3 inl out 4 lsb 1.4.3.4 output slew rate * sr out voltage m ode load capacitance <20nf u sing conditions of 1.4.3.1 0.1 v/ ? s 1.4.3.5 short circuit current * i out_max 5 10 20 ma 1.4.3.6 addressable output signal range * v out_adr 2048 steps 0 1 vdda 1.4.4. pwm output (out pin , io1 pin ) 1.4.4.1 pwm high voltage v pwm_h load resistance > 10 k ? 0.9 vdda 1.4.4.2 pwm low voltage v pwm_l load resistance > 10 k ? 0.1 vdda 1.4.4.3 pwm output slew rate * sr pwm load capacitanc e < 1nf 15 v/ ? s
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 11 of 31 n o . parameter symbol conditions min typ max unit 1.4.5. temperature sensors (ir_temp pin ) 1.4.5.1 sensitivity external diode / resistor meas. st ts_e at r adc = 13 b it s 75 210 v/lsb 1.4.6. digital outputs (io1, io2, out pins in d igital m ode) 1.4.6.1 output high level v dout_h load resistance > 1 k ? 0.9 vdda 1.4.6.2 output low level v dout_l load resistance > 1 k ? 0.1 vdda 1.4.6.3 output current * i dout 4 ma 1.4.7. system response 1.4.7.1 startup time 4 t sta power - o n to 1 st measure ment result at output 2 5 ms 1.4.7.2 response time * t resp 66% change in input signal ; refer to table 2 . 3 for f con 1.66 2.66 3.66 1/f con 1.4.7.3 overall accuracy (deviation from ideal line including inl, gain , and offset errors) *, 5 ac out t amb_tqi ( - 25 to 85 ? c) & vdda adv 0.10 % t amb_tqa ( - 40 to 125 ? c) & vdda adv 0.25 % t amb_tqe ( - 40 to 150 ? c) & vdda adv with current - loop out & t amb_tqi & vdda adv (refer to the zsc31050 applica tion note current loop ) 0.50 % 1.4.7.4 analog output noise: peak - to - peak * v noise, pp shorted inputs, gain ? 210 bandwidth ? 10khz 10 mv 1.4.7.5 analog output noise : rms * v noise, rms shorted inputs, gain ? 210 bandwidth ? 10khz 3 mv 1.4.7.6 ratio metricity error re out_5v 5% respect ively 1000ppm 10% (5v) 500 ppm re out_3v 5% respectively 2000ppm 10% (3v) 1000 ppm 1. recommended bias adjustment ? 4 ; note the application recommendations and power consumption adjust ment constraints given in the zsc31050 application note current loop . 2. de - rated performance in lower part of supply voltage range (2.7 to 3.3v): 2.5 to 5 %vdda and 95 to 97.5%vdda. 3. output linearity and accuracy can be enhanced by an additional analog output stage calibration. 4. owi , s tar t window disabled (depend ing on resolution and configuration , start routine begins approximately 0.8ms after power - on). 5. accuracy better than 0.5% requires offset and gain calibration for the analog output stage ; p arameter only for ratiometric output. refer to zsc31050 functional description for other output configurations.
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 12 of 31 1.5. interface characteristics table 1 . 7 . interface characteristics n o . parameter symbol conditions min typ max unit 1.5.1. multiport serial interfaces (i 2 c ? , spi) 1.5.1.1 input high level 1 v i2c_in_h 0.7 1 vdda - 5.5 v dc 1.5.1.2 input low level v i2c_in_l 0 0.3 v dda 1.5.1.3 output low level v i2c_out_l 0.1 vdd a 1.5.1.4 load capacitance at the sda pin c sda 400 pf 1.5.1.5 clock frequency at the scl pin 2 f scl f clk 2mhz 400 khz 1.5.1.6 pull - up r esistor r i2c_pu 500 ? 1.5.1.7 input capacitance (each pin) c i2 c_in also valid for spi . 10 pf 1.5.2. one - wire serial interface (zacwire?) 1.5.2.1 owi start window t owi_start 20 ms 1.5.2.2 pull - up resistance master r owi_pu 330 ? 1.5.2.3 owi load capacitance c owi_load 20 ? s < t owi_bit < 100 ? s 0.08 t owi_bit / r owi_ pu 1.5.2.4 voltage level l ow v owi_l 0.2 vdda 1.5.2.5 voltage level h igh v owi_h 0.75 vdda 1. the maximum value in v dc is independent from vdda in i2c? mode. 2. internal clock frequency f clk must be at least 5 times higher than the communication clock f requency.
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 13 of 31 2 circuit description note: this data sheet provides specifications and a general overview of zsc31050 operation. for details of operation, including configuration settings and related eeprom registers, refer to the zsc31050 functional descriptio n . 2.1. signal flow the zsc31050 s signal path includes both analog ( shown in pink in figure 2 . 1 ) and digital ( blue ) sections . the analog path is differential ; i.e., the differential bridge sensor signal is handled int ernally via two signal lines that are symmetrical around a common mode potential (analog ground = vdda/2) , which improves noise rejection . therefore it is possible to amplify positive and negative input signals, which are located in the common mode range o f the signal input. figure 2 . 1 block diagram of the zsc31050 pga programmable gain amplifier mux multiplexer adc analog - to - digital converter cmc calibration microcontroller dac digital - to - analog converter fio1 flexible i/o 1: analog out (voltage/current), pwm2, zacwire tm (one - wire - interface) fio2 flexible i/o 2: pwm1, spi data out, spi slave select, alarm1, alarm2 sif serial interface: i 2 c ? data i/o, spi data in, clock pcomp pro grammable comparator eeprom non v olatile memory for calibration parameters and configuration ts on - c hip temperature sensor (pn - junction) rom memory for correction formula and algorithm pwm pwm module g a i n f a c t o r s e n s o r b r i d g e e x t . t e m p . s e n s . i n t . t e m p . s e n s o r a n a l o g f r o n t - e n d ( a f e ) m u x a d c p g a + ? e x t e r n a l t e m p e r a t u r e s e n s o r i r _ t e m p v b r v i n p v i n n d i g i t a l s e c t i o n t e m p . s e n s . s e l e c t a d c m o d e o f f s e t s h i f t c t r l - r e g s s c l s i f s d a p c o m p f i o 1 f i o 2 o u t / o w i i o 1 i o 2 d a c p w m i n t e r f a c e s c m c e e p r o m r a m i n 3
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 14 of 31 the differential signal from the bridge sensor is pre - am plified by the programmable gain amplifier (pga). the m ultiplexer (mux) transmits the signals from the bridge sensor, external diode , or separate temperature sensor to the adc in a certain sequence (the internal pn - junction (ts) can be used instead of the external temperature diode ). next the adc converts these signals into digital values. the digital signal correction takes place in the calibration micro controller (cmc). it is based on a special correction formula located in the rom and sensor - specific co efficients (stored in the eeprom during calibration). depend ing on the programmed output configuration , the corrected sensor signal is output as an analog value, a pwm signal , or a digital value in the format of spi, i 2 c ? or zacwire tm . the output signal is provided at two flexible i/o modules (fio) and at the serial interface (sif). the configuration data and the correction parameters can be programmed into the eeprom via the digital interfaces. the modular circuit concept enables fast custom designs varyi ng these blocks and, as a res ult, functionality and die size (see section 7 for more details). 2.2. application modes for each application , a configuration set must be established (generally prior to calibration) by programming the on - chip eeprom regarding to the following modes: ? sensor channel ? sensor mode: ratiometric voltage or current supply mode. ? input range: t he gain of the analog front end must be chosen with respect to the maximum sensor signal span , which req uires also adjust ing the zero point of the adc . ? additional offset compensation: t he extended analog offset compensation must be enabled if required ; e.g. , if the sensor offset voltage is close to or larger than the sensor span. ? resolution/response time: t he adc must be configured for resolution and conversion settings (1st or 2nd order). these settings influence the sampling rate, signal integration time , and , as a result, the noise immunity. ? polarity of the sensor bridge inputs: this allows invert ing the sensor bridge inputs ? analog output ? choice of output method (voltage value, current loop , or pwm) for output register 1. ? optional additional output register 2: pwm via io1 pin or alarm out module via io1 or io 2 pin . ? digital communication: the protocol and its parameter s must be selected . ? temperature ? t he temperature sensor type for the temperature correction must be chosen (only main channel (t1) is usable for correction) . ? optional: a secondary temperature sensor (t2) can be chosen as a second sensor output. ? supply voltage : for non - ratiometric output , the voltage regulation must be configured. note: not all possible combinations of settings are allowed (see section 2.5 ).
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 15 of 31 the calibration procedure must include establ ishing the coefficients for calibration calculation and the following steps depending on configuration: ? adjustment of t he extended offset compensation ? zero compensat ion of temperature measurement ? adjustment of the bridge current ? settings for the reference voltage if using the reference voltage ? settings for the thresholds and delays for the alarms if using the alarms 2.3. analog front - end (afe) the analog front - end consists of the programmable gain amplifier (pga), the multiplexer (mux) , and the analog - to - digita l converter (adc). 2.3.1. programmable gain amplifier (pga) the following tables show the adjustable gains, the processable sensor signal spans , and the common mode range allowed . table 2 . 1 adjustable gains, resultin g sensor signal spans, and common mode ranges no. pga gain a in gain amp1 gain amp2 gain amp3 max. s pan v in_sp in mv/v input r ange v in_cm in % vdda 1 420 30 7 2 2 43 to 57 2 280 30 4 . 66 2 3 40 to 59 3 210 15 7 2 4 43 to 57 4 140 15 4 . 66 2 6 40 to 59 5 105 15 3 . 5 2 8 38 to 62 6 70 7 . 5 4 . 66 2 12 40 to 59 7 52 . 5 7 . 5 3 . 5 2 16 38 to 62 8 35 3 . 75 4 . 66 2 24 40 to 59 9 26 . 3 3 . 75 3 . 5 2 32 38 to 62 10 14 1 7 2 50 43 to 57 11 9 . 3 1 4 . 66 2 80 40 to 59 12 7 1 3 . 5 2 100 38 to 62 13 2 . 8 1 1 . 4 2 280 21 to 76 bridge in voltage mode; refer to the zsc31050 functional descrip tion for the usable input signal / common mode range at the bridge in current mode.
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 16 of 31 2.3.2. extended zero point compensation (xzc) the zsc31050 supports two methods of sensor offset cancellation (zero shift): ? digital offset correction ? xzc C an analog cancellation for large offset values (up to approx imately 300% of span) the digital sensor offse t correction is processed at the digital signal correction/conditioning by the cmc. the xzc analog sensor offset pre - compensation is needed for compensation of large offset values, which would overdrive the analog signal path due to uncompensated amplifica tion . for analog sensor offset pre - compensation , a compensation voltage is added in the analog pre - gaining signal path (coarse offset removal). the analog offset compensation in the afe can be adjusted by 6 eeprom bits. it allows an analog zero point shift of up to 300% of the processable signal span. the zero point shift z xzc of the temperature measurements can also be adjusted by 6 eeprom bits ( recommended z xzc = - 20 to +20) . it is calculated by equation (1) : (1) where v xzc = extended zero compensation voltage vdd br = bridge v oltage k = calculation factor a in = input gain table 2 . 2 extended zero point compensation (xzc) range pga gain a in max. span v in_sp ( mv/v ) calculation factor k offset shift per step ( % full span ) approx. maximum offset shift ( mv/v ) approx. maximum shift ( % v in_sp ) (@ 20 steps) 420 2 3 . 0 15% +/ - 7 330 280 3 1 . 833 9% +/ - 6 200 210 4 3 . 0 15% +/ - 14 330 140 6 1 . 833 9% +/ - 12 200 105 8 1 . 25 6% +/ - 12 140 70 12 1 . 833 9% +/ - 24 200 52 . 5 16 1 . 25 6% +/ - 22 140 35 24 1 . 833 9% +/ - 48 200 in xzc br xzc a z k vdd v ? ? ? 20
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 17 of 31 pga gain a in max. span v in_sp ( mv/v ) calculation factor k offset shift per step ( % full span ) approx. maximum offset shift ( mv/v ) approx. maximum shift ( % v in_sp ) (@ 20 steps) 26 . 3 32 1 . 25 6% +/ - 45 140 14 50 3 . 0 15% +/ - 180 330 9 . 3 80 1 . 833 9% +/ - 160 200 7 100 1 . 25 6% +/ - 140 140 2 . 8 280 0 . 2 1% +/ - 60 22 no te: z xzc can be adjusted in the range of C 31 to 31 ; however, parameters are guaranteed only for - 20 to 20. 2.3.3. measurement cycle performed by multiplexer depending on eeprom settings, t he multiplexer selects the following inputs in a set sequence as shown in figure 2 . 2 . ? internal offset of the input channel (auto - zero) measured by short circuiting the input ? bridge temperature signal measured by external and internal diode (pn - junction) ? bridge temperature signal measu red by bridge resistors ? temperature measure d by external thermistor ? pre - amplified bridge sensor signal the complete measurement cycle is controlled by the cmc. the cycle diagram at the right shows its principle structure. the e eprom adjustable parameter s are ? m easurement count n ( bits 9:7 in configuration word cfgcyc): n =<1, 2, 4, 8, 16, 32, 64, 128> ? t emperature 2 measurement enable , t2e=<0, 1> after power - on, the start routine is called. it includes the bridge sensor and auto - zero measurement. i t also mea - sur es the main temperature channel and its auto - zero if enabled . figure 2 . 2 . measurement cycle zsc31050 start routine n bridge sensor measurement 1 temp 1 auto - zero n bridge sensor measurement 1 temp 1 measurement n bridge sensor measurement 1 bridge sensor auto - zero n * t2e bridge sensor measurement t2e temp 2 auto - zero n * t2e bridge sensor measurement t2e temp 2 measurement n bridge sensor measurement 1 common mode voltage f i g . 4 : m e a s u r e
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 18 of 31 2.3.4. analog - to - digital converter the adc is a charge - balancing converter using full differential switched capacitor technique. it can be used as a first or second order converter: in the first order mode , the adc is inherently monotone and insensitive against short and long term instability of the clock frequency. the conversion cycle time depends on the desired resolution and can be roughly cal culated by equation (2) : (2) the available adc resolutions are r adc = <9, 10, 11, 12, 13, 14>. in the second order mode , two conversions are stacked with the advantage of a much shorter conversion cycle time but with the drawback of a lower noise immunity cause d by the shorter signal integration period. the conversion cycle time in thi s mode is roughly calculated by equation (3) : (3) the available adc resolutions are r adc = <11, 12, 13, 14, 15>. the result of the ad con version is a relative counter result correspo nding to equation (4) : (4) z adc number of counts ; i.e., the result of the conversion) v adc_diff diff erential input voltage of adc: ( a in * v in_diff ) v adc_ref reference voltage of adc: ( vbr or vdda) rs adc digital adc r ange s hift (rs adc = 1 / 2 , 3 / 4 , 7 / 8 , 15 / 16 , controlled by eeprom setting ) a sensor input signal can be shifted via the rs adc value in to the optimal input range of the adc. the potential at the vbr pin is used in vbr=vref mode as the ad converter s reference voltage v adc_ref . sensor bridges with no ratiometric behavior (e . g . , temperature - compensated bridges) that are supplied by a constant current, require the vdda potential as v adc_ref and this can be adjust ed by in configuration. if th is mode is enabled, xzc can not be used (adjustment=0), but it must be enabled (refer to the calculation spread sheet zsc31050 _bri dge_current_excitation_rev*.xls for details). note: the ad conversion time (sample rate) is only part of the complete signal conditioning cycle. ? ? s t adc r _ cyc ? ? 2 1 ? ? s t adc r _ cyc ? ? ? ? ? ? ? ? ? ? ? 2 3 2 2 ? ? ? ? ? ? ? ? ? ? ? ? ? adc adc_ref adc_off adc_diff r adc rs v v v z adc 1 2
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 19 of 31 table 2 . 3 output resolution versus sample rate adc order ( o adc ) maximum output resolution sample rate f con r adc ** digital out analog out r pwm f clk =2mhz f clk =2.25mhz ( bit ) ( bit ) ( bit ) ( bit ) ( hz ) ( hz ) 1 9 9 9 9 1302 1465 10 10 10 10 781 879 11 11 11 11 434 488 12 12 11 12 230 259 13 13 11 12 115 129 14 14 11 12 59 67 2 10 10 10 10 3906 4395 11 11 11 11 3906 4395 12 12 11 12 3906 4395 13 13 11 12 1953 2197 14 14 11 12 1953 2197 15 15 11 12 977 1099 2.4. system control the system control is started by the internal power - on reset (po r ) using the internal clock generator or an external clock . it has the following features: ? control of the i/o functions and the measurement cycle using the eeprom - stored configuration settings . ? 16 - bit correction calculation for each measurement signal using the eeprom - stored calibration coefficients and rom - based algorithms . ? error checking: to increase safety, the eeprom data are verified via an eeprom signature during the initialization procedure and the registers of the cmc are continuously observed with a parity check. if an error is detected, the error flag of the cmc is set and the outputs are drive n to a diagnostic value . see section 2.7 . note: conditioning options include up to third - order sensor input correction (derated) . the available adjust ment ranges depend on the specific calibration parameters ; b asically, o ffset compensation and linear correction are only limited by the lo ss of resolution the compensation will cause . t he second - order correction is possible up to approximately 20% of the full - scale difference from a straight line ; third - order is possible up to approximately 10% (adc resolution = 13 bit s ). the temperature calibration includes first and second order correction , which should be sufficient in all most all applications . adc resolution also affects calibration options C each additional bit of resolution reduces the calibration range by approximately 50%. ** adc resolution should b e 1 to 2 bits higher t han applied o utput r esolution
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 20 of 31 2.5. output stage the zsc31050 provides the following i/o pins: out, io1, io2 and sda. the signal formats listed in table 2 . 4 can be output via these pins : analog (voltage or current), pwm, data (spi/i 2 c?), alarm. the following values can be provided at the i/o pins: bridge sensor signal, temperature signal 1, temperature signal 2, and alarm s . note: the a larm signal s (alarm 1 and alarm 2) only a pply t o the bridge sensor signal ; they cannot be used as an alarm for the temperature signal. because some pins are dual - purpose, there are restrictions on the possible combinations for outputs and interface connections. table 2 . 4 gives an overview of valid combinations. for some combinations in the spi mode, pin assignments depend on whether the zsc31050 is in the command mode (cm) or the normal operation mode (nom) as indicated in the mode column ( refer to the zsc3105 0 functional description for more details ) . note: in the spi m ode , the io2 pin is used as the slave select , so no alarm 2 can be output in this mode. table 2 . 4 . output c onfigurations o verview co nfiguration number sif i/o pins used mode i 2 c? spi out io1 io2 sda 1 ? data i/o 2 ? alarm1 data i/o 3 ? alarm2 data i/o 4 ? alarm1 alarm2 data i/o 5 ? pwm1 data i/o 6 ? pwm1 alarm2 data i/o 7 ? analog data i/o 8 ? analog alarm1 data i/o 9 ? analog alarm2 data i/o 10 ? analog alarm1 alarm2 data i/o 11 ? analog pwm1 data i/o 12 ? analog pwm1 alarm2 data i/o 13 ? pwm2 data i/o 14 ? pwm2 alarm1 data i/o 15 ? pwm2 alarm2 data i/o 16 ? pwm2 alarm1 alarm2 data i/o 17 ? pwm2 pwm1 data i/o 18 ? pwm2 pwm1 alarm2 data i/o
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 21 of 31 co nfiguration number sif i/o pins used mode i 2 c? spi out io1 io2 sda 19 ? data out (sdo) slave select data in 20 ? data out (sdo) slave select data in cm alarm1 - - nom 21 ? data out slave select data in cm pwm1 - - nom 22 ? analog data out slave select data in 23 ? analog data out slave select data in cm alarm1 - - nom 24 ? analog data out slave select data in cm pwm1 - - nom 25 ? pwm2 data out slave select data in 26 ? pwm2 data out slave se lect data in cm alarm1 - - nom 27 ? pwm2 data out slave select data in cm pwm1 - - nom 2.5.1. analog output for the analog output , three 15 - bit registers store the compensated measurement results for the bridge sensor signal and temperature measureme nt s 1 and 2. each register can be independe ntly switched to either the digital - to - analog converter module (dac) or the pwm module (see figure 2 . 1 ) and then output via the fio1 or fio2 output module connected to the out or io1 p in respectively according to table 2 . 5 : table 2 . 5 . analog o utput c onfiguration out put module out io1 voltage (dac) ? pwm ? ?
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 22 of 31 the volta ge output module consists of an 11 - bit resistor string dac with a buffered output and a subsequent inverting amplifier with class ab rail - to - rail o p erational a mp lifier . the two feedback net works are connected to the fbn and fbp pins . this structure offers wide flexibility for the output configuration ; for example , voltage output and 4 ma to 20 ma current loop output. accidentally s hort - circuiting the analog output to vss or vdda does not damage the zsc31050 . the pwm module outputs the analog measurement val ue via a stream of pulses wit h a duty cycle that is determined by the analog value . the pwm frequency depends on the resolution and clock divider settings . the maximum analog output resolution is 12 bit s; however the maximum pwm frequency is 4 khz (9 bit s ) . if both pwm 2 and spi protocol are activated (configuration numbers 25, 26, and 27 in table 2 . 4 ) , the output io1 pin is shared between the pwm output and the spi sdo output of the serial interface , and spi interfa ce communication (command mode) interrupts the pwm output . 2.5.2. comparator module (alarm output) the comparator module consists of two comparator chan nels that can be connected to io1 and io2 . each can be independently programmed for threshold, hysteresis, swit ching direction and on/off delay. a window comparator mode is also available. 2.5.3. serial digital interface the zsc31050 includes a serial digital interface that is able to communicate in three different communication protocols : i 2 c tm , spi , and zacwire tm (one - wire communication). in spi mode , the io2 pin operates as the slave - select input, and the io1 pin is the data output (sdo) . initializing communication after power - on for approximately 20ms (the start window), the zsc31050 interface is in the zacwire ? mode, which allows communication via the one - wire interface (out pin ). if a proper communication request is detected during the start window , the interface stays in the zacwire ? mode (the command mode) . this state can be left by set commands or a new power - on. if no request is received during the start window , then the serial interface switches to communication via either i 2 c ? or spi mode depending on eeprom settings . the out pin can be used as an analog output or as a pwm output depending on eeprom settings . the start window can be disabled (or enabled) by a special eeprom setting. for a detailed description of the serial interfaces , see the zsc31050 functional description .
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 23 of 31 2.6. voltage regulator for 3v to 5v ( 10%) r atiometric output applications, the external supply voltage can be used for sensor element biasing. if an absolute analog output is required, then the internal voltage regulator with an external power regulation element (jfet) can be used. the regulation i s bandgap reference based and designed for an external supply voltage v supp in the range of 7v to 40vdc. the internal supply and sensor bridge voltage can be varied between 3v and 5.5v in four steps with the voltage regulator. 2.7. watchdog and error detection the zsc31050 detects various possible errors. a detected error is signaled by changing to a diagnostic mode. in this case , the analog output is set to the high or low level (maximum or minimum possible output value) depending on the error and the output r egisters of the digital serial interface are set to a significant error code. a watchdog continuously monitors the operation of the cmc and the progress of the measurement loop. a continuous check of the sensor bridge for broken wires is done by two comp arators monitoring the input voltage of each input [(vssa + 0.5v) to (vdda C 0.5v)]. t he common mode voltage of the sensor is continuously monitored to detect sensor aging . different functions and blocks in the digital section are continuously monitored, i ncluding the ram , rom, eeprom, and r egister content s. see section 1.3.4 in the zsc31050 functional description for a detailed description of all monitored blocks and methods of indicating errors.
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 24 of 31 3 application circuit examples figure 3 . 1 application example 1 typical ratiometric measurement with voltage output, temperature compensation via external diode, internal vdd regulator , and active sensor connection check (bridge must not be at vdda) figure 3 . 2 application example 2 0v to 10v output configuration, supply regulator (external jfet), temperature compensation via internal diode , and bridge in v oltage m ode figure 3 . 3 application example 3 absolute voltage output, supply regulator (external jfet), constant current excitation of the sensor bridge, temperature compensation by bridge voltage drop meas urement, int ernal vdd regulator without external capacitor figure 3 . 4 application example 4 ratiometric bridge differential signal measurement, 3 C wire connection for end - of - line calibration at out pin (za cwire?), additional temperature mea - surement with external thermistor , and pwm output at io1 pin s e r i a l i n t e r f a c e f l e x i b l e i / o s s e n s o r b r i d g e z s c 3 1 0 5 0 2 1 3 4 6 5 7 8 1 5 1 6 1 4 1 3 1 1 1 2 1 0 9 v d d a i n 3 v g a t e i o 1 i o 2 s c l s d a v d d v i n n v s s v i n p v b r i r _ t e m p f b p o u t f b n s c l s d a o u t / o w i g n d v s u p p c 2 0 . 1 f c 1 0 . 1 f c 2 < 1 5 n f i o 1 i o 2 + 2 . 7 v t o + 5 . 5 v s e n s o r b r i d g e z s c 3 1 0 5 0 2 1 3 4 6 5 7 8 1 5 1 6 1 4 1 3 1 1 1 2 1 0 9 v d d a i n 3 v g a t e i o 1 i o 2 s c l s d a v d d v i n n v s s v i n p v b r i r _ t e m p f b p o u t f b n s c l s d a g n d v s u p p c 3 0 . 1 f c 2 0 . 1 f z d 6 . 8 v c 1 0 . 1 f r 3 3 9 0 o u t : 0 t o 1 0 v r 1 2 . 2 k r 4 1 k r 2 2 k v d d a = 5 v + 7 v t o + 4 0 v i o 2 i o 1 s e n s o r b r i d g e z s c 3 1 0 5 0 2 1 3 4 6 5 7 8 1 5 1 6 1 4 1 3 1 1 1 2 1 0 9 v d d a i n 3 v g a t e i o 1 i o 2 s c l s d a v d d v i n n v s s v i n p v b r i r _ t e m p f b p o u t f b n s c l s d a g n d v s u p p v d d a = 5 v + 7 v t o + 4 0 v r b r _ r e f c 2 < 1 5 n f o u t / o w i i o 2 i o 1 c 1 0 . 1 f c 2 0 . 1 z d 6 . 8 v s e r i a l i n t e r f a c e f l e x i b l e i / o s s e n s o r b r i d g e z s c 3 1 0 5 0 2 1 3 4 6 5 7 8 1 5 1 6 1 4 1 3 1 1 1 2 1 0 9 v d d a i n 3 v g a t e i o 1 i o 2 s c l s d a v d d v i n n v s s v i n p v b r i r _ t e m p f b p o u t f b n s c l s d a g n d v s u p p + 2 . 7 v t o + 5 . 5 v r t c 2 < 1 5 n f o u t / o w i c 1 0 . 1 f c 2 0 . 1 f p t c p w m o u t
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 25 of 31 figure 3 . 5 application example 5 two - wire 4 to 20 ma configuration (7 to 40 v), temperature compensation via internal diode note: it is possible to combine or separate connectivity of different application examples. for vdd generation, zmdi recommends using the internal supply voltage regulator with an external capacitor. refer to additional application notes for use of supply voltage regulation features (non - ratiometric mode) and current loop output mode ( for more details, refer to the zsc31050 application note current loop ) . 4 esd/latch - up - protection all pins ha ve an esd protection of >2000v, except the inn, inp , and fbp pins , which have an esd protec tion > 1200v. all pins have a latch - up protection of ? 100ma or +8v/ C 4v ( relative to vss/vssa) . r efer to section 5 for details and restrictions. esd protection refer enced to the h uman b ody m odel is tested with devices in ssop16 packages during product qualification. the esd test follows the human body model with 1.5kohm/100pf based on mil 883, method 3015.7. s e n s o r b r i d g e z s c 3 1 0 5 0 2 1 3 4 6 5 7 8 1 5 1 6 1 4 1 3 1 1 1 2 1 0 9 v d d a i n 3 v g a t e i o 1 i o 2 s c l s d a v d d v i n n v s s v i n p v b r i r _ t e m p f b p o u t f b n s c l s d a g n d v s u p p z d 7 . 5 v r e 1 5 0 r s e n s 5 0 v d d a = 5 v + 7 v t o + 4 0 v i o 1 i o 2 c 2 0 . 1 f c 3 1 0 n f c 1 0 . 1 f ( c u r r e n t l o o p + ) ( c u r r e n t l o o p ) s e r i a l i n t e r f a c e f l e x i b l e i / o s r b 2 . 2 k c 4 2 2 0 p f
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 26 of 31 5 pin configuration and package table 5 . 1 . pin configuration pin name description remarks l atch - up related application circuit restrictions and/or remarks 1 vdda posit ive analog supply voltage supply 2 in3 resistive temp erature sensor in and external clock in analog in free ly accessible by application ( vulnerable to latch - up if specifications in section 4 are exceeded ) 3 vgate gate voltage for external regulator fet analog out only connection to external fet 4 io1 spi data out or alarm1 or pwm1 output digital io freely accessible by application 5 io2 spi slave select or alarm2 digital io freely accessible by application 6 scl i2c ? clock or spi clock digital in, pu ll - up freely accessible by application 7 sda data i / o for i2c ? or data in for spi digital i/o, pull - up freely accessible by application 8 vdd positive digital supply voltage supply only capacitor to vss is allowed ; otherwise no application access 9 fbn negative feedback connection output stage analog i/o freely accessible by application 10 out analog output or pwm2 o utput or one - wire interface i/o analog out or digital i/o freely accessible by application 11 fbp positive feedback connection output stag e analog i/o freely accessible by application 12 ir_temp current source resistor i/o and temp erature diode in analog i/o circuitry secures potential is within vss - vdda range ; otherwise no application access 13 vbr bridge top sensing in bridge current out analog i/o only short to vdda or connection to sensor bridge ; otherwise no application access 14 vinp positive input from sensor bridge analog in freely accessible by application 15 vss negative supply voltage ground 16 vinn negative input from sensor bridge analog in freely accessible by application
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 27 of 31 the standard package for the zsc31050 is a ssop16 (5.3mm body width) with lead - pitch 0.65mm: figure 5 . 1 . pin configuration pin n o. pin name pin - na me pin no. 9 fbn vdd 8 10 out sda 7 11 fbp scl 6 12 ir_temp io2 5 13 vbr io1 4 14 vinp vgate 3 15 vss in3 2 16 vinn vdda 1 6 reliability a fit rate < 5fit (temp=55c, s=60%) is guaranteed. a typical fit rate of the c7a tech nolog y that is us ed for the zsc31050 is 2.5fit. 7 customization for high - volume applications that require an up graded or downgraded functionality compared to the zsc31050 , zmdi can customize the circuit design by adding or removing certain functional blocks. zmdi has a co nsiderable library of sensor - dedicated circuitry blocks that enable zmdi to provide a custom solution quickly. please contact zmdi for further information.
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 28 of 31 8 ordering information product code description package zsc31050feb zsc31050 die temperature range: - 40c to +150c unsawn on wafer zsc31050fec zsc31050 die temperature range: - 40c to +150c sawn on wafer frame ZSC31050FED zsc31050 die temperature range: - 40c to +150c waffle pack zsc31050feg1 zsc31050 ssop - 16 temperature range: - 40c to +150 c tube: add - t to sales code reel: add - r zsc31050fab zsc31050 die temperature range: - 40c to +125c unsawn on wafer zsc31050fac zsc31050 die temperature range: - 40c to +125c sawn on wafer frame zsc31050fad zsc31050 die temperature range: - 40c to +125c waffle pack zsc31050fag1 zsc31050 ssop - 16 temperature range: - 40c to +125c tube: add - t to sales code reel: add - r zsc31050fib zsc31050 die temperature range: - 25 c to + 8 5c unsawn on wafer zsc31050fic zsc31050 die temperatur e range: - 25 c to + 8 5c sawn on wafer frame zsc31050fid zsc31050 die temperature range: - 25 c to + 8 5c waffle pack zsc31050fig1 zsc31050 ssop - 16 temperature range: - 25 c to + 8 5c tube: add - t to sales code reel: add - r zsc31050kit evaluation kit v3.0 zsc31050 ssc evaluation kit: 3 interconnecting boards, 5 zsc31050 ssop - 16 samples, usb cable kit zsc31050 mass calibration system v1.1 modular mass calibration system (msc) for zsc31050: mcs boards, cable, connectors kit
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 29 of 31 9 related documents documen t file name zsc31050 feature sheet zsc31050 _feature_sheet_ r ev_x_yy.pdf zsc31050 functional description zsc31050 _functionaldescription_ r ev_x_yy.pdf zsc31050 evaluation kit description zsc31050 _application_kit_description_ r ev_x_yy.pdf zsc31050 bridge cur rent excitation spreadsheet zsc31050_bridge_current_excitation_rev*.xls zsc31050 application note 0 - 10v output zsc31050_an_0 - 10v_output_rev_x_yy.pdf zsc31050 application note current loop zsc31050_an_current_loop_rev_x_yy.pdf visit zmdis website www.zmdi.com or contact your nearest sales office for the latest version of these documents. 10 glossary term description adc analog - to - digital converter afe analog front - end cmc calibration microcontroller cmos complementar y metal oxide semiconductor dnl differential nonlinearity esd electrostatic device fio flexible input/output fso full scale output ic integrated circuit inl integral nonlinearity mux multiplexer pga programmable gain amplifier pmc pressure measure ment count poc power on control pwm pulse width modulation ptc positive temperature coefficient
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 30 of 31 term description sif serial interface t2e temperature 2 measurement ts temperature sensor xzc extended zero - point compensation 11 document revision history revision date de scription 1.00 - first release of document. 1.01 - 1.02 - headlines and footnotes at all pages updated . input capacitance of digital interface pins added in 5.5.1.7 . 1.03 - n ote 4 default configuration added in 5.4. o verall accuracy / values and condit ions for current loop output added in 5.4.7.3. reliability / fit rate values added in section 6. 1.04 september 2009 reformatted with new zmdi template . 1.05 - 1.06 october 2009 update to related documents and document revision history . update of compa ny references for zmdi . new format for revision numbering in footer. 1.07 november 30, 2009 reformatted for new zmdi template . addition of zsc31050 feature sheet section on pages 2 and 3. addition of ordering codes for zsc31050 and e valuation k its . 1.0 8 - 1.09 february 1 6 , 2010 addition of units for 1.4.1.2 and change in symbol for 1.5.2.1 . addition of n ew design for block diagram and all application schematics . update for glossary . addition of cm/nom informations in table 2 . 4 . update for phone number for zmd far east, ltd. update for ordering codes description . minor edits. 1.10 february 1 8 , 2010 changed cd to dvd in ordering code . removed die/package option f . minor edits .
zsc31050 advanced differential sensor signal conditioner data sheet july 7 , 2013 ? 201 3 zentrum mikroelektronik dresden ag rev. 1.1 2 all rights re served. the material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publicatio n is subject to changes without notice. 31 of 31 revision date de scription 1.11 july 2 9 , 2010 changed applica tion circuit examples in figure 3 . 1 and figure 3 . 5 . add ition of current consumption in feature sheet area . new style for equation in section 2.3.2 and 2.3.4 . correct ion of calculation formula for z adc in section 2.3.4 . minor edits to rs adc formula in section 2.3.4 . update of product name from zmd31050 to zsc31050 . 1.12 july 7 , 2013 add ition of rb and c4 in to the c urrent l oop application circuit ( figure 3 . 5 ) . changed absolute maximum ratings for i2c ? inter face . updated zmdi contact information and imagery for cover and headers. correction of equation (4) . removal of zsc31050 fc x x part numbers. minor edits. sales and further information www.zmdi.com ssc@zmdi.com zentrum mikroelektronik dresden ag global headquarters grenzstrasse 28 01109 dresden, germany central office: phone +49.351.8822.0 fax +49.351.8822.600 zmd america, inc. 1525 mccart hy blvd., #212 milpitas, ca 95035 - 7453 usa usa phone +855.275.9634 zentrum mikroelektronik dresden ag, japan office 2nd floor, shinbashi tokyu bldg. 4 - 21 - 3, shinbashi, minato - ku tokyo, 105 - 0004 japan zmd far east, ltd. 3f, no. 51, sec. 2, keelung road 110 52 taipei taiwan zentrum mikroelektronik dresden ag, korea office u - space 1 building 11th floor, unit ja - 1102 670 sampyeong - dong bundang - gu, seongnam - si gyeonggi - do, 463 - 400 korea phone +82.31.950.7679 fax +82.504.841.3026 phone +408.883.6310 fax +408. 883.6358 phone +81.3.6895.7410 fax +81.3.6895.7301 phone +886.2.2377.8189 fax +886.2.2377.8199 european technical support phone +49.351.8822.7.772 fax +49.351.8822.87.772 disclaimer : this information applies to a product under development. its character istics and specifications are subject to change without notice. zentrum mikroelek tronik dresden ag (zmd ag) assumes no obligation regarding future manufacture unless otherwise agreed to in writing. the information furnished hereby is believed to be true a nd accurate. however, under no circumstances shall zmd ag be liable to any customer, licensee, or any other third party for any special, indirect, incidental, or consequential damages of any kind or nature what soever arising out of or in any way related to the furnishing, performance, or use of this technical data. zmd ag hereby expressly disclaims any liability of zmd ag to any customer, licensee or any other third party, and any such customer, licensee and any other third party hereby waives any liab ility of zmd ag for any damages in connection with or arising out of the furnishing, performance or use of this technical data, whether based on contract, warranty, tort (including negligence), strict liability, or otherwise. european sales (stuttgart) phone + 49.711.674517.55 fax +49.711.674517.87955
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