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ams datasheet page 1 [v1-00] 2015-apr-06 document feedback HPS-100 automotive hydrogen sensor the HPS-100 is an automotive hydrogen sensor that monitors hydrogen concentrations of 0 C 100 vol%. the design fulfills zone 2 requirements according to atex 100a. the predicted concentration is transmitted to the host via the can bus interface or pwm. ordering information and content guide appear at end of datasheet. key benefits & features the benefits and features of HPS-100, automotive hydrogen sensor are listed below: figure 1: added value of using HPS-100 benefits features ? high sensitivity over large concentration range ? 0 C 100% h 2 in nitrogen ?accuracy 2% vol. ? resolution 0.5% vol. ? low cross sensitivity ? heated field-effect transistor technology ? no detection towards hc, h 2 s, n 2 , co, co 2 , no x ? designed for humid environment ? humidity influence <1% typical ? operating humidity range 5C100% relative humidity including condensation ? fast response time ? start-up time <5s ? speed of response (t 90 ) < 5s ? speed of recovery < 5s ? can bus interface 500 kbit/s (iso11898-2) ? pwm output (on request) ? low power consumption ? 70 ma (typical) ? long-term stability and reliability ? esd and emc protection ? operating temperature range C40oc to 90oc ? operating pressure range 0.3 C 3 bar (absolute) ? safety integrity level and explosion proof ? designed for sil2 (iec 61508) and atex 100a zone 2 ?long lifetime ?ip6k7 and ip6k9k qualifie d with expected lifetime of 5 years general description
page 2 ams datasheet document feedback [v1-00] 2015-apr-06 HPS-100 ? general description applications hydrogen gas measurement in fuel cell systems and other in-process applications. block diagram the functional blocks of this device for reference are shown below: figure 2: HPS-100 block diagram power supply ldo voltage regulation emc filter protection overvoltage, reverse polarity heater switch resistor h 2 -sensor timer controller wa tc hdog output switch connector
ams datasheet page 3 [v1-00] 2015-apr-06 document feedback HPS-100 ? overview figure 3: HPS-100 overview overview process connection power & can bus connector
page 4 ams datasheet document feedback [v1-00] 2015-apr-06 HPS-100 ? overview installation the HPS-100 is designed for process connection with metric straight screw thread with o-ring m14x1.5 in accordance with iso 6149-3 (stud end) and to fit into iso 6149-1 (port). recommended o-ring, 11.30.2, 2.20.08 or 11.30.2, 2.40.08 epdm 70 peroxide crosslinked or fpm 75 (viton) note(s): the o-ring is currently part of the delivery recommended torque for fixati on: 15 nm (+10% -0%) acc. iso 6149-3 recommended orientation of the sensor, see below. figure 4: recommended mounting position of the sensor
ams datasheet page 5 [v1-00] 2015-apr-06 document feedback HPS-100 ? electrical interface electrical connector the sensor connector is a a2105404381 - code a with mating connector mqs 4-pin, te connectivity amp p/n 1-967640-1 code a. figure 5: pin coding amp a2105404381 - code a figure 6: pin assignment pin function 1vcc 2gnd 3 can C high no termination resistor 4 can C low no termination resistor electrical interface 1 4 2 3
page 6 ams datasheet document feedback [v1-00] 2015-apr-06 HPS-100 ? electrical interface can bus interface this section describes the can bus interface that is available in some variants of HPS-100. physical interface the physical interface is two-wire balanced. it is a high speed can interface (iso 11898-2) with bus bit rate at 500 kbit/s. can matrix HPS-100 will send the first can me ssage within 0.1 s after reset. the repetition rate of the can messages is 100ms 2ms. the first h 2 concentration will be delivered after 5 s. the can messages prior to that will have the not_ready bit set, indicating that the concentration value of the message is not valid. in case of a warm restart (<5 s) error category 1 will be set for 10 s. the msg counter increments with each can message. the can message has the id 1120 (0x0460). the byte 7 is not used and has the value 0.
ams datasheet page 7 [v1-00] 2015-apr-06 document feedback HPS-100 ? electrical interface figure 7: can matrix message layout HPS-100 system: h2as receiver name: h2 anode sensor id: (hex) 0x460 datalengthcode: 8 interrupt: no rev. 3.1 transceive: tx remote: no repetition rate: 100 ms msb lsb variables short name datatype resolutio n phys. range / unit raw range no value b7 b6 b5 b4 b3 b2 b1 b0 byte-no. h2 concentration h2as_con byte 0.5 0 .. 100 vol.% h2 0 .. 200 255 byte 0 status sensor not ready h2as_not_ready bit b0 byte 1 error category h2as_err_cat 2 bit b2 b1 emc correction active h2as_emc_corr bit b3 error 2 bit x error 3 bit x error 4 bit x error 5 bit x board temperature h2as_bt 2 byte 0.1 -40 ? c .. 155 | c 0 .. 1950 65535 b15 b14 b13 b12 b11 b10 b9 b8 byte 2 (motorola format) b7 b6 b5 b4 b3 b2 b1 byte3 sw version y.z h2as_sw byte 1 0 .. f . 0 .. f 0.. 255 y yyyzzzzbyte 4 hw version type h2as_hw_type 2 bit 1 1 1 b7 b6 byte 5 hw release h2as_hw_rev 6 bit 1 0 .. 63 0 .. 63 b5 b4 b3 b2 b1 b0 byte 5 msg counter h2as_count byte 1 0 .. 127 0 .. 127 255 to be incremented each message ! byte 6 definition error category : code name description 0 no error h2as sensor ok 1 performance error general function still given (e.g. tolerance range may be increased to x % vol.) 2 slight functional error general function still given but h igh likelihood for upcoming severe error (sensor should be replaced) 3 severe functional error severe error, general function not given anymore, sensor not longer trustable (= signal not available) definition hw version type : code name description 0 h2es type a h2 exhaust sensor 1 h2as h2 anode sensor valid for this component! 2 h2s h2 ambient sensor 3 h2es type b h2 stack module vent sensor
page 8 ams datasheet document feedback [v1-00] 2015-apr-06 HPS-100 ? electrical interface byte 0, h 2 concentration figure 8: byte 0 bit order this byte shows the h 2 concentration in a resolution of 0.5. x = concentration in % hydrogen byte value = (x % h 2 )* 200/ (100 % h 2 ) x % = byte value *(100% h 2 )/200 range: 0 - 200 (hexadecimal 0 - c7) no value: 255 (hexadecimal ff) values: 0 - 100% h 2 resolution: 0.5 =(100 % h 2 ) / 200 the no value is sent if there is no valid h 2 concentration (accompanied by not_ready bit in status byte (byte 1)) byte 1 status figure 9: byte 1 status bit assignment this byte shows the status of the module. bit 0 : if the not_ready bit is set, the module is not up or not working. value: 0 or 1 no value: 1 bit 1+2 : the error category value: 0 - 3 bit msb 7 6 5 4 3 2 1 lsb 0 byte 0 xxxxxxxx bit msb 7 6 5 4 3 2 1 lsb 0 byte 1 error 5 error 4 error 3 error 2 emc_corr bit 2 err_ category bit 1 err_ category not_ready (eq1) (eq2)
ams datasheet page 9 [v1-00] 2015-apr-06 document feedback HPS-100 ? electrical interface figure 10: definition of error category bit 3: emc disturbance detected, compensation active (0-no disturbance, 1-disturbance) bit 4 to 7: not used. byte 2 + byte 3, board temperature figure 11: byte 2 + byte 3 board temperature bit order these two bytes show the board temperature in oc. range: 0 - 1950 (hexadecimal 0 C 79e) value: -40 oc to 155 oc no value: 65335 (hexadecimal ffff) resolution: 0.1 oc 0-399 = -40 oc to -0.1oc 400 = 0 oc 401C1950 = 0.1 oc to 155 oc byte 2 is the high byte and byte 3 the low byte. value name description 0 no error sensor ok 1 performance error general function still given; warm start-up indication (<5s) 2 slight functional error general function still given but high likelihood for upcoming severe error (sensor should be replaced) 3 severe functional error severe error, general function not given anymore, sensor not longer trustable (=signal not available) bit msb 7 6 5 4 3 2 1 lsb 0 byte 2 xxxxxxxx byte 3 xxxxxxxx
page 10 ams datasheet document feedback [v1-00] 2015-apr-06 HPS-100 ? electrical interface byte 4, software version y.z figure 12: byte 4 software version numbering code this byte shows the firmware version. view: y . z range: 0 - 255 (hexadecimal 0 - ff) value: 0 . 0 - 15 . 15 (hexadecimal 0.0 - f.f) byte 5, hardware version figure 13: byte 5 hardware version numbering code this byte is divided into two parts. the first part shows the hardware type. bit 6 and 7 : hw type range: 0 - 3 here 1 figure 14: definition of hw version type the second part of byte 5 shows the revision of the hardware. bit 0 - 5 : revision of the hardware. range: 0 - 63 bit msb 7 6 5 4 3 2 1 lsb 0 byte 4 yyyyxxxx bit msb 7 6 5 4 3 2 1 lsb 0 byte 5 hw type hw type rev. rev. rev. rev. rev. rev. hw type name description 0 hls-440p type a h 2 exhaust sensor (h2es type a) 1 HPS-100 h 2 anoder sensor (h2as) 2 h 2 ambient sensor (h2s) 3hls-440p type b h 2 stack module vent sensor (h2es type b)
ams datasheet page 11 [v1-00] 2015-apr-06 document feedback HPS-100 ? electrical interface byte 6, msg counter figure 15: byte 6 message counter order the msg counter byte number s the can messages and is incremented by 1 with each message range: 0 - 127 (hexadecimal 0 - 7f) value: 0 - 127 after reaching the value 127 the counter starts from 0 again. byte 7, empty figure 16: byte 7 default values t h i s b y te i s n e e d e d to f u l f i l l t h e c a n d a t a l e n g t h c o d e o f 8 by te s. this byte is not used and has the value 0. bit msb 7 6 5 4 3 2 1 lsb 0 byte 6 xxxxxxxx bit msb 7 6 5 4 3 2 1 lsb 0 byte 7 00000000
page 12 ams datasheet document feedback [v1-00] 2015-apr-06 HPS-100 ? electrical interface pwm this section describes the pwm outp ut that is available in some variants of HPS-100. physical interface the electrical connector is the sa me as in the variants with can bus interface (see electrical connector ). the pwm signal is created as a differential can signal on pin 3 and 4. a can signal is said to be in a dominant state when the signal lines are separated (a domi nant bit is transmitted). when the signal lines are at the same voltage level, the state is recessive. recommended circuitry to convert can signals to ttl is specified in a separate document, available on request. the pwm signal is only an output signal. no other transmitting devices should be attached to the bus. the pwm signal the pwm signal has a period time of 255 s. the rather short period is chosen since modern can transceivers do not allow for a longer dominant state. the duration of the recessive state can be translated into output h 2 prediction from the sensor module. the recessive duration (pulse width) ranges from 20 to 220 s, which corresponds to 0 to 100% hydrogen. an error is shown as a 10 s pulse width. at startup the pulse width will be 255 s (100% duty cycle) until the first valid h 2 concentration is delivered after 5 s.
ams datasheet page 13 [v1-00] 2015-apr-06 document feedback HPS-100 ? electrical interface the figure below shows the output for 0% hydrogen (pulse width of 20 s). figure 17: sensor output for 0% hydrogen (pulse width of 20 s) the relation between detected h 2 concentration (in ppm) and pulse width (in s) is: h 2 = (pulse width C 20)*5000 the figure below shows the relation between h 2 prediction and pulse width. figure 18: relation between h 2 prediction and pulse width pulse width message type 10 s error 20 s 0% h 2 21 s 0.5% h 2 219 s 99.5% h 2 220 s 100% h 2 (eq3)
page 14 ams datasheet document feedback [v1-00] 2015-apr-06 HPS-100 ? specifications figure 19: typical characteristics description value sensor function target gas hydrogen concentration range 0 C 100 vol% h 2 in n 2 accuracy 2 vol% under typical conditions resolution 0.5 vol% speed of response (t 90 )<5 s speed of recovery <5 s cross-sensitivity none towards hc, h 2 s, n 2 , co, co 2 , no x some influence of humidity , depending on application conditions (typically 1 vol% h 2 ) humidity correction by subtracting 1.5% start-up time 5 s expected lifetime 5 years or 3000 operation hours safety explosion proof designed to fulfill zone 2 requirements according to atex 100a self test/error handling yes electrical supply voltage 8.5 C16 v supply current 70 ma typical @ 13.8 v and 20 oc, increased current during start-up phase (avg. 200 ma during first 1s) can interface version 2.0 iso 11898 connector a2105404381 - code a mating connector mqs 4-pin, amp 1-967640-1 code a esd/reverse polarity yes environmental operation temperature range -40 oc to 90 oc storage temperature range -50 oc to 95 oc humidity 5-100% including condensation specifications
ams datasheet page 15 [v1-00] 2015-apr-06 document feedback HPS-100 ? specifications the figure below describes the specification of the different variants of HPS-100 figure 20: specification of the different variants of HPS-100 operating pressure 0.3 C 3 bar(a) emc automotive requirements mechanical dimensions (l, ?) l=93.5mm ? = 30mm stud m14x1.5 acc. to standard iso 6149-3 o-ring id: 11.3 0.2 mm, rec. cord size 2.2 0.08 mm alt. cord size 2.4 0.08 mm weight 77 g material stainless steel and pbt gf30 filter membrane pall supor 450r, 0.45 m ip code ip6k7 and ip6k9k description default on request can interface version 2.0 iso 11898 n.a. can bit rate (kbits/s) 500 250 n.a. pwm output - yes description value
page 16 ams datasheet document feedback [v1-00] 2015-apr-06 HPS-100 ? handling instructions due to the fact that the sensor element consists of a silicon chip facing the surrounding the following precautions have to be taken into account: during storage and handling avoid: ? humidity (condensing conditions) ? dropping (sensor must be replaced if dropped) ? dust (especially if cap is removed) ? mechanical impact (especially the entrance membrane) ? electromagnetic radiation (rf fields, high magnetic fields) in case of storage and transport it is recommended to keep the sensor within its original pa ckaging (plastic cap and esd protected bubble bag). the disassembly of any parts is not allowed, except for the removal of the plastic cap directly before final assembly. handling instructions
ams datasheet page 17 [v1-00] 2015-apr-06 document feedback HPS-100 ? reference data figure 21: concentration measurement with h 2 pulse width of 2 min and nominal concentration 10%, 30%, 50%, 70% and 90% vol. h 2 figure 22: deviation of prediction over nominal concentration reference data
page 18 ams datasheet document feedback [v1-00] 2015-apr-06 HPS-100 ? mechanical information figure 23: sensor dimensions note(s) and/or footnote(s): 1. dimensions are in millimeters. mating connector: housing: a2105404381 C code a contacts: a0135454526 seals: a0005456980 o-ring: 11.3 0.2, 2.2 0.08 epdm 70 peroxide crosslinked mechanical information green rohs
ams datasheet page 19 [v1-00] 2015-apr-06 document feedback HPS-100 ? ordering & contact information figure 24: ordering information note(s) and/or footnote(s): 1. for availability of other variants contact ams . buy our products or get free samples online at: www.ams.com/icdirect technical support is available at: www.ams.com/technical-support provide feedback about this document at: www.ams.com/document-feedback for further information and requests, e-mail us at: ams_sales@ams.com for sales offices, distributors and representatives, please visit: www.ams.com/contact headquarters ams ag tobelbaderstrasse 30 8141 unterpremstaetten austria, europe tel: +43 (0) 3136 500 0 website: www.ams.com ordering code type delivery form delivery quantity HPS-100 can (500 kbit/s) (1) individually wrapped single item ordering & contact information
page 20 ams datasheet document feedback [v1-00] 2015-apr-06 HPS-100 ? rohs compliant & ams green statement rohs: the term rohs compliant means that ams ag products fully comply with current rohs directives. our semiconductor products do not contain any chemicals for all 6 substance categories, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. where designed to be soldered at high temperatures, rohs compliant products are suitable for use in specif ied lead-free processes. ams green (rohs compliant and no sb/br): ams green defines that in addition to rohs compliance, our products are free of bromine (br) and antimony (sb) based flame retardants (br or sb do not exceed 0.1% by weight in homogeneous material). important information: the information provided in this statement represents ams ag knowledge and belief as of the date that it is provided. ams ag bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. efforts are unde rway to better integrate information from third parties. ams ag has taken and continues to take reasonable steps to prov ide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ams ag and ams ag suppliers consider certain information to be proprietary, and thus cas numbers and other limited information may not be available for release. rohs compliant & ams green statement
ams datasheet page 21 [v1-00] 2015-apr-06 document feedback HPS-100 ? copyrights & disclaimer copyright ams ag, tobelbader strasse 30, 8141 unterpremstaetten, austria-europe. trademarks registered. all rights reserved. the material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. devices sold by ams ag are covered by the warranty and patent indemnification provisions appe aring in its general terms of trade. ams ag makes no warranty, express, statutory, implied, or by description regarding th e information set forth herein. ams ag reserves the right to ch ange specifications and prices at any time and without notice. therefore, prior to designing this product into a system, it is necessary to check with ams ag for current information. this product is intended for use in commercial applications. applications requiring extended temperature range, unusual environmental requirements, or high reliability applications , such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by ams ag for each application. this product is provided by ams ag as is and any express or implied wa rranties, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose are disclaimed. ams ag shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. no obligation or liability to recipient or any th ird party shall arise or flow out of ams ag rendering of technical or other services. copyrights & disclaimer
page 22 ams datasheet document feedback [v1-00] 2015-apr-06 HPS-100 ? document status document status product status definition product preview pre-development information in this datasheet is based on product ideas in the planning phase of development. all specifications are design goals without any warranty and are subject to change without notice preliminary datasheet pre-production information in this datasheet is based on products in the design, validation or qualific ation phase of development. the performance and parameters shown in this document are preliminary without any warranty and are subject to change without notice datasheet production information in this datashee t is based on products in ramp-up to full production or full production which conform to specifications in accordance with the terms of ams ag standard warranty as given in the general terms of trade datasheet (discontinued) discontinued information in this datasheet is based on products which conform to specifications in accordance with the terms of ams ag standard warranty as given in the general terms of trade, but these products have been superseded and should not be used for new designs document status
ams datasheet page 23 [v1-00] 2015-apr-06 document feedback HPS-100 ? revision information note(s) and/or footnote(s): 1. page and figure numbers for the previous version may diff er from page and figure numbers in the current revision. 2. correction of typographical er rors is not explicitly mentioned. changes from (2014-nov) to current revision 1-00 (2015-apr-06) page content of applied sensor datasheet was updated to the latest ams design revision information
page 24 ams datasheet document feedback [v1-00] 2015-apr-06 HPS-100 ? content guide 1 general description 1 key benefits & features 2 applications 2 block diagram 3overview 4 installation 5 electrical interface 5 electrical connector 6 can bus interface 6physical interface 6can matrix 8 byte 0, h2_concentration 8 byte 1 status 9 byte 2 + byte 3, board temperature h2as_bt 10 byte 4, software version y.z 10 byte 5, hardware version 11 byte 6, msg counter 11 byte 7, empty 12 pwm 12 physical interface 12 the pwm signal 14 specifications 16 handling instructions 17 reference data 18 mechanical information 19 ordering & contact information 20 rohs compliant & ams green statement 21 copyrights & disclaimer 22 document status 23 revision information content guide

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